Engine Control Module Scan Tool Information RPO LZG
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No diagnostic trouble codes (DTCs) |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
5-Volt Reference 1 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 1 circuit at the ECM. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 1 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
5-Volt Reference 2 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 2 circuit at the ECM. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 2 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
A/C Disengage 1-8 History | -- | Varies | This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot. |
A/C High Side Pressure | -- | 1.43 Volts Varies | The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor. |
A/C On | 2.39 Volts Varies | ||
A/C High Side Pressure | -- | 868 kPa/125 psi Varies | The scan tool displays -103 to +3,119 kPa (-14 to +452 psi). This is the A/C refrigerant pressure sensor voltage signal converted to pressure. |
A/C On | 1568 kPa/227 psi Varies | ||
A/C Off for WOT | -- | No | This parameter indicates if the A/C system was commanded off for a wide open throttle event. |
A/C Pressure Disable | -- | No | The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi). |
A/C Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
A/C Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
A/C Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
A/C Relay Command | -- | Off | The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor clutch relay. |
With A/C Selected | On | ||
A/C Relay Request Signal | -- | No | The scan tool displays Yes or No. Yes is displayed when the HVAC control module is requesting A/C operation. |
With A/C Selected | Yes | ||
Air Flow Calculated | -- | 3-6 g/s | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s). |
Ambient Air Temperature | -- | Varies | Outside temperature at any given altitude expressed in degrees centigrade (°C) and Fahrenheit (°F). |
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle, in percent, of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensors | -- | 0% | This parameter displays the average of the accelerator pedal position (APP) sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in percent. |
APP Sensor 1 | Accelerator pedal not actuated | 1.04 Volts | This parameter displays the voltage signal sent to the ECM from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 4.27 Volts | ||
APP Sensor 1 and 2 | -- | Agree | This parameter displays the results of a ECM test that compares the signals from the APP sensors 1 and 2 . The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions. |
APP Sensor 1 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the position of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensor 2 | Accelerator pedal not actuated | 0.47 V | This parameter displays the voltage signal sent to the control module from APP sensor 2 of the APP sensor assembly. APP sensor 2 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 2.10 Volts | ||
APP Sensor 2 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the angle of the APP sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
BARO | -- | 60-104 kPa (varies with altitude) | This parameter displays the barometric pressure as calculated by the control module using the signal from the manifold absolute pressure (MAP) sensor measured when the ignition is turned on with the engine not running. The control module will update the barometric pressure during wide-open throttle (WOT) conditions. |
BPP Circuit Signal | -- | Released | The scan tool displays Applied or Released. This parameter shows the position of the brake pedal position sensor through the stop lamp switch signal circuit. |
Brake pedal depressed | Applied | ||
BPP Signal | -- | Released | The scan tool displays Applied, Released, or Invalid. This parameter shows the position of the brake pedal position sensor through the serial data bus. |
Brake pedal depressed | Applied | ||
Calc. TWC Temp. | -- | 446°C/834°F Varies | Calculated catalytic converter temperature. |
Catalyst Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No |
Catalyst Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
Catalytic Converter Protection Active | -- | No | This parameter displays the state of the Catalytic Converter Protection mode. |
Change Engine Oil Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the Change Engine Oil indicator as commanded by the ECM. |
CKP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the ECM receives a signal from the crankshaft position (CKP) sensor. |
CKP Resync Counter | -- | 0 Counts | This parameter displays the number of times the ECM has to resynchronize the CKP sensor. |
CKP Sensor | -- | Same as Engine Speed | This parameter displays the engine speed as calculated by the ECM using the signal from the CKP sensor. |
Cmmd. A/F Equivalence Ratio | -- | 1.0:1 | Equivalence numbers greater than one represent excess fuel in the fuel air mix. Equivalence numbers less than one represent a deficiency of fuel in the fuel air mix for complete combustion. The equivalence ratio will be reported as one when the vehicle is in Closed Loop. |
CMP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the ECM receives a signal from the Camshaft position (CMP) sensor. |
CMP Angle | -- | 0° | This parameters shows the actual amount, in camshaft degrees, of camshaft actuation. |
CMP Command | -- | 0% | This parameters shows the commanded percentage of the CMP actuator, by the ECM. |
CMP Sensor | -- | Same as Engine Speed | This parameter displays the speed of the engine as calculated by the signal from the CMP sensor. |
CMP Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
CMP Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
CMP Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
CMP Variance | -- | 0.0° | This parameter shows the difference, in degrees of camshaft actuation, between the desired camshaft position and the actual position. |
Cold Startup | -- | Varies | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle. |
Cooling Fan Command | -- | 0-100% Varies | This parameter displays the amount of fan power commanded by the ECM. |
Crank Request Signal | -- | No | This parameter shows the power mode status of the starter motor. When Yes is displayed, a request to engage the starter has been received by the ECM. |
Ignition switch in the crank position | Yes | ||
Cruise Disengage 1-8 History | -- | Varies | These parameters indicate the last 8 reasons the ECM disengaged the cruise control. Reason 1 contains the most recent reason. The reasons include the following: Brake Pedal Initialize, Cancel, Clutch, Coast Disengage, Coast Speed Low, TAC Inhibit, Accel Rate, Decel Rate, High Speed, Illegal Mode, Low Speed, None, Cruise Sw OFF, Over Set Speed, S/C On Speed Hi, ECM Inhibit, Simul S/C-R/A, TCS, Under Set Speed, DLC Override, Memory DTC, Eng Run Time, Engine Speed, DTC Set, RPM Limit, First Gear, APP Override, Low Voltage, D Whl Spd Low, D Whl Spd Hi, Cruise S/S, Cruise Sw Data, ECT Overtemp, VSES, Trans. DTC, BPP Data, BPP DTC, Park Brake, ACC Inhibit, ACC Brake DTC, ACC Option, ACC Brake Inop, PTO Active. |
Cruise Cancel Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Control Active | -- | Inactive | This parameter displays the status of the cruise control system as determined by the control module. The scan tool will display Active when the cruise control system is in control of vehicle speed. The scan tool will display Inactive when the cruise control system is not operating. |
Cruise On/Off Switch | -- | Off | The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | On | ||
Cruise Resume/Accel. Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Set/Coast Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cycles of Misfire Data | -- | 0-100 Counts incrementing | This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the ECM. |
Cyl. Deact. Disable 1-8 History | -- | Varies | This parameter shows the reason the Active Fuel Management system changed from V3 mode to V6 mode, for the last 8 occurrences. Reasons displayed include: None, MAP Low, Brake Vac Low, APP Rate High, APP High, Ign. Voltage, Eng Oil Press, Eng Oil Temp, Eng Coolant Temp, Engine Speed, Trans. Gear, Trans. Range, Trans. Shifting, DLC Override, Min Time All Cyl, Max Deact Time, Oil Aeration, DFCO Active, Inj Stable Time, Heater Perf, MAP DTC, Brk Vac Sen DTC, TAC DTC, EOP DTC, ECT DTC, IAT DTC, VSS DTC, Deact Sol DTC, Misfire DTC, CKP DTC, CMP DTC, EC Ign Relay DTC, Torq Reduction, Axle Torq Limit, ECT Overtemp, TWC Overtemp, Piston Protect, Coolant Hot, RPM Limit. |
Cyl. Deactivation Cycles | -- | Varies | This parameter displays the number of times the engine switches between V6 mode, and V3 mode during each ignition cycle. The counter will reset to zero and increment again, if the count reaches 255 during the current ignition cycle. |
Cyl. Deact. Performance Test | -- | OK | This parameter displays OK if all the Active Fuel Management enabling conditions are met. The parameter displays Fault if one or more enabling conditions are out of range. |
Cyl. 1, 3, or 5 Deact. Sol. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1, 3, or 5 Deact. Sol. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1, 3, or 5 Deact. Sol. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 1, 3, or 5 Deact. Sol. Command | -- | Off | This parameter displays ON when V3 mode is commanded or OFF when V6 mode is commanded. |
Cyl. Deact. System Command | -- | V6 | This parameter displays V6 when all three Active Fuel Management (AFM) cylinder solenoids are deactivated or V3 when the AFM cylinder solenoids are activated. |
Cyl. 1-6 Inj. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1-6 Inj. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1-6 Inj. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 1 and 4 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1 and 4 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1 and 4 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 2 and 5 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 2 and 5 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 2 and 5 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 3 and 6 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 3 and 6 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 3 and 6 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Decel. Fuel Cutoff | -- | Inactive | This parameter displays the status of the operating mode used to turn off the fuel injectors during certain deceleration conditions. When the scan tool displays Active, the ECM has turned off the fuel injectors. When the scan tool displays Inactive, the fuel system is operating normally. |
Desired CMP | -- | 0° | This parameter displays the desired camshaft position, in degrees, as calculated by the control module. |
Desired Idle Speed | -- | 768 RPM | This parameter displays the engine idle speed in RPM commanded by the ECM. The control module compensates for various engine loads in order to maintain the desired engine RPM at idle. This parameter is not valid unless the engine is running. |
Distance with Cyl. Activated | -- | Varies | This parameter displays the total distance, in kilometers (km) or miles (mi), the vehicle traveled in V6 mode for the current ignition cycle. |
Distance with Cyl. Deactivated | -- | Varies | This parameter displays the total distance, in kilometers (km) or miles (mi), the vehicle traveled in V3 mode for the current ignition cycle. |
Distance Since DTC Cleared | -- | Varies | This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven. |
EC Ign. Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EC Ign. Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EC Ign. Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EC Ignition Relay Feedback Signal | -- | 13.0-14.2 Volts | This parameter displays the voltage signal sent to the ECM from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF. |
EC Ignition Relay Command | -- | On | This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the ECM, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module. |
ECM Authentication Status | -- | Valid | This parameter indicates the result of the comparison between the last received immobilizer system response and the expected response calculated by the ECM. |
ECM Challenge Status | -- | Invalid | This parameter shows the immobilizer system status of the ECM challenge. This indicates whether the currently calculated ECM challenge is valid. |
ECM Response Source | -- | Normal | The parameter indicates the source used to calculate the ECM response. The sources include Normal Start, Remote Vehicle Start, PTO Remote Start. |
ECT Sensor | -- | 96-103°C / 204-217°F | This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature sensor. When the coolant temperature is low, the scan tool will display a low temperature. When the coolant temperature is high, the scan tool will display a high temperature. |
Engine Load | -- | Varies | This parameter displays the engine load in percent based on inputs to the ECM from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load. |
Engine Oil Pressure Sensor | -- | 137-193 kPa / 20-28 psi | This parameter displays the engine oil pressure. |
Engine Oil Pressure Sensor | -- | 1.39 Volts Varies | This parameter displays the engine oil pressure sensor output in volts. |
Engine Oil Level Switch | -- | OK | This parameter indicates if the Engine oil level is OK or Low. |
Engine Oil Life Remaining | -- | Varies | This parameter indicates the percentage of time left before an oil change is necessary according to the oil life monitor. |
Engine Oil Temperature Calculated | -- | 109°C/228°F Varies | This parameter displays the engine oil temperature. |
Engine Off Time | -- | Varies | This parameter displays the time elapsed since the engine was shut OFF. |
Engine Run Time | -- | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running. |
Engine Speed | -- | 750-800 RPM | This parameter displays the speed of the crankshaft as determined by the ECM using an input from the crankshaft position (CKP) sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds. |
EPM Inhibit Reason | -- | Varies | This parameter displays the reason for the regulated voltage control (RVC) override command. RVC lowers system operating voltage to reduce the system electrical load and improve fuel economy performance. The RVC command will be overridden if the voltage commanded is below the minimum system voltage required to ensure that the fuel demand, powertrain OBD diagnostics, airflow measurement, cylinder deactivation, or transmission control module functions will execute properly. Reasons include the following: None, Device Control, Fuel Demand, OBD Diagnostics, Airflow Measurement, Cylinder Deactivation, Transmission Control Module Request. |
EVAP Fault History | -- | No Fault | This parameter displays the result of the evaporative emission (EVAP) system diagnostic. Scan tool displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK, WEAK VACUUM, or NO TEST RESULT. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM. |
EVAP Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Purge Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Purge Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Purge Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Purge Solenoid Command | -- | 10-15% Varies | This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the ECM expressed as a percent. The scan tool will display a high percentage when the ECM is commanding the EVAP purge solenoid to be open a large amount . The scan tool will display a low percentage when the ECM is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the ECM is commanding the EVAP purge solenoid closed. |
EVAP Vent Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Vent Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Vent Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Vent Solenoid Command | -- | Venting | This parameter displays the state of the EVAP vent solenoid commanded by the ECM expressed as a Venting or Not Venting. The scan tool will display a venting when the ECM is commanding the EVAP vent solenoid to be open . The scan tool will display a not venting when the ECM is commanding the EVAP vent solenoid to be closed. |
Ext. Travel BPP Signal | -- | Released | This parameter displays Applied, Released, or Invalid. A state of Applied indicates the brake pedal position sensor has traveled beyond a moderate, extended threshold as determined by the brake sensing module and received over serial data. |
Brake Pedal firmly applied | Applied | ||
FC Relay 1 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 1 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 1 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 1 Command | -- | On | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
FC Relay 2 and 3 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 2 and 3 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 2 and 3 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 2 and 3 Command | -- | Off | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
Fuel Alcohol Content | -- | Varies | This parameter displays the percentage of alcohol in the fuel. The value is calculated by the ECM using various sensor inputs. |
Fuel Composition Learn | -- | Inactive | This parameter displays Active or Inactive. Active will be displayed if the ECM is learning the alcohol content of the fuel. |
Fuel Level Sensor | -- | Varies | This parameter displays the approximate fuel level in the fuel tank as a voltage. The ECM calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Fuel Pump Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Fuel Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Fuel Pump Relay Command | -- | On | This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be on when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be off when the scan tool indicates the Fuel Pump Relay Command is Off. |
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as a percentage. The ECM calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Tank Pressure Sensor | -- | -19.8 to +12.52 mm Hg/-10.5 to +6.17 in H2O | This parameter displays the fuel tank pressure as calculated based on a signal sent to the ECM from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high. |
Fuel Tank Pressure Sensor | -- | 0.2-4.0 V | This parameter displays the fuel tank pressure as calculated based on a signal sent to the ECM from the fuel tank pressure (FTP) sensor. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low. |
Fuel Tank Rated Capacity | -- | 64.2 Liters / 17 Gallons | This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the ECM to match the vehicle. |
Fuel Trim Cell | -- | 0 | This parameter displays the fuel trim cell number as calculated by the ECM based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load. |
Fuel Trim Learn | -- | Enabled | This parameter indicates if the ECM is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled. |
Fuel Trim System Test State | -- | Varies | This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test. |
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low. |
GEN F-Terminal Signal | -- | 45% Varies with electrical load | This parameter is an ECM input of the generator field duty cycle. This is an indication of generator load on the engine. |
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
GEN L-Terminal Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
GEN L-Terminal Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
GEN L-Terminal Command | -- | 65% Varies with electrical load | The scan tool displays 0-100 percent. The scan tool displays the percentage of the output voltage of the generator. |
GEN L-Terminal Signal Command | -- | On | This parameter indicates the generator commanded state by the ECM. |
HO2S Heater Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S Heater Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S / O2S Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S / O2S Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving / monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S 1 | -- | 50-950 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S 1 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. |
HO2S 1 Heater | -- | 0.76 Amps | This parameter displays the current through the ECM when the HO2S heater is commanded ON by the ECM. HO2S Heater Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. |
HO2S 1 Heater Command | -- | Varies | This parameter displays the commanded state of the HO2S heater by the ECM. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. |
HO2S 1 Heater Command | -- | On | This parameter displays the commanded state of the HO2S heater by the ECM. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. |
HO2S 1 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 1 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 1 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HO2S 2 | 50-850 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. | |
HO2S 2 Heater | 0.76 Amps | This parameter displays the current through the ECM when the HO2S heater is commanded ON by the control module. HO2S Heater Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. | |
HO2S 2 Heater Command | Varies | This parameter displays the commanded state of the HO2S heater by the ECM. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. | |
HO2S 2 Heater Command | On | This parameter displays the commanded state of the HO2S heater by the ECM. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. | |
HO2S 2 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 2 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 2 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HOT Open Loop | -- | Inactive | This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally. |
IAT Sensor | -- | Varies | The scan tool displays °C/F. The ECM converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. Intake air temp is used by the ECM to adjust fuel delivery and spark timing according to incoming air density. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The ECM converts the resistance of the intake air temperature sensor to degrees. The ECM uses the IAT in order to adjust fuel delivery and spark timing according to incoming air density. |
Ignition 1 Signal | -- | 13-14.2 Volts | This parameter displays the voltage measured at the ignition 1 circuit of the ECM. Voltage is applied to the ECM when the ignition switch is in the ignition 1 position. |
Ignition Accessory Signal | -- | On | This parameter displays the state of the ignition 0 input to the ECM from the ignition switch. The scan tool will display On when the ignition switch is in the ignition accessory position. The scan tool will display Off when the ignition switch is in any other position. |
Inj. 1-6 Disabled Due to Misfire | -- | No | This parameter displays the status of the fuel injector driver by the ECM. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the ECM due to a misfire. |
Injector PWM | -- | 1.55-1.85 ms | The scan tool displays mS Indicates the base PWM or ON time of the fuel injectors in milliseconds. When the engine load is increased, the injector pulse width will increase. Indicates the amount of time the ECM is commanding each injector ON during each engine cycle. A longer injector pulse width will cause more fuel to be delivered. Injector pulse width should increase with increased engine load. |
Intake Manifold Pressure | -- | Varies | This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the ECM. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or high load cruising. |
Knock Detected Cyl. 1-6 | -- | No | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event. |
Knock Retard | -- | 0 Degrees | The scan tool displays °. Indicates the amount of spark the ECM is removing from ignition control (IC) spark advance in response to the signal from the knock sensors. The traction control system desired torque signal from the electronic brake and traction control module (EBTCM) may cause knock retard to display a value more than 0.0 degrees if traction control is active. |
Long Term FT | -- | -10 to +10% | The scan tool range is -99 to +99 percent . This parameter indicates the Long Term fuel trim (FT) correction for bank 1 as commanded by the ECM. A change made to the fuel delivery will be indicated by the Long and Short Term FT values. The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Loop Status | -- | Closed | Closed loop indicates that the ECM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the ECM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and MAF sensor inputs only. |
Low Engine Oil Level Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil level indicator as monitored by the ECM. |
Low EOP Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil pressure indicator as monitored by the ECM. |
LT FT Test Avg. | -- | 0.68% | This parameter is the average long term fuel trim for this bank as calculated by the ECM. The scan tool will display a value more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0, indicating time is being subtracted from the injector pulse width, reducing the amount of fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio. |
LT FT Test Avg. w/o purge | -- | 1.02% | This parameter is calculated by the ECM based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will display a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event |
MAF Performance Test | -- | OK | This parameter displays the status of the mass air flow (MAF) performance test by the ECM. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAF Sensor | -- | 3-6 g/s (varies with altitude) | The scan tool displays g/s The scan tool displays a range of 0.0-655 g/s. The mass air flow (MAF) is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine. |
MAF Sensor | -- | 1,200-1,300 Hz (varies with altitude) | The scan tool displays a range of 0-31,999 Hz. The MAF sensor is a hot wire type air flow sensor. The ECM converts current draw needed by the MAF to keep the hot wires at a constant into a frequency signal. The scan tool displays this frequency in a hertz signal. |
MAP Performance Test 1 | -- | OK | This parameter displays the status of the MAP performance test 1 by the ECM. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Performance Test 2 | -- | OK | This parameter displays the status of the MAP performance test 2 by the ECM. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Sensor | -- | 20-48 kPa (varies with altitude) | The scan tool displays kPa The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MAP Sensor | -- | 0.4-2.0 V (varies with altitude) | The scan tool displays Volts The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
MIL Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
MIL Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
MIL Command | -- | Off | This parameter displays the commanded state of the MIL control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check. |
MIL Requested by DTC | -- | No | This parameter shows if the illumination of the MIL has been requested by a failed diagnostic trouble code (DTC). |
Misfire Current Cyl. 1-6 | -- | 0 Counts | The scan tool displays 0-255 counts. The display shows the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers. |
Misfire History Cyl. 1-6 | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
PNP Switch | -- | Park / Neutral | The scan tool displays the position of the transmission selection as Park/Neutral or In Gear. |
Power Enrichment | -- | Inactive | Scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the ECM has detected conditions appropriate to operate in Power Enrichment mode. The ECM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the ECM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occurring during acceleration. |
Output Shaft Speed Sensor | -- | 0 RPM | The parameter shows the transmission output speed, the speed at the output of the gear box, determined from the speed measured by the transmission output speed (TOS) sensor with the application of the factors to account for the location of the sensor, e.g. after the gear box, after the final chain, after the transfer case, after the final drive, etc. In applications that include both a transmission output speed sensor and a transfer case speed sensor, this parameter will apply specifically to the output of the transmission. |
Reduced Engine Power | -- | Inactive | The scan tool displays Active or Inactive. The scan tool displays Active when the ECM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The ECM limits the engine power. |
RVS Disable 1-8 History | -- | Varies | These parameters show the last 8 reasons the ECM disabled remote vehicle start (RVS). Reason 1 is the most current reason. |
RVS Request Signal | -- | Off | This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode. |
Short Term FT | -- | -10 to +10% | The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT . The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Spark | -- | 18-24 Degrees | The scan tool displays a range of -64 to +64°. The scan tool displays the amount of degrees the ECM commands. The ECM computes the desired spark advance using the following: (1) ECT, (2) engine speed (RPM), (3) load, (4) vehicle speed. The ECM adjusts the timing. A negative (-) value indicates degrees before top dead center (BTDC) or spark advance; a positive value indicates degrees after top dead center (ATDC) or spark retard. |
ST FT Test Avg. | -- | 0.98-1.00% | This parameter is calculated by the ECM based on an intrusive test by the ECM. The Short Term FT Test Average used for the short term correction of the fuel delivery. The scan tool will display a high value for a large amount of short term fuel correction, and 0% for no short term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. |
Starter Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Starter Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Starter Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Starter Relay Command | -- | Off | The scan tool displays ON or OFF. This displays the commanded state of the starter relay by the ECM. |
Ignition switch in the crank position | On | ||
Start-up ECT | -- | Varies | Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The scan tool displays the engine ECT at the time the engine was started. The ECM uses start-up ECT for certain DTCs. Indicates the engine coolant temperature at the time that the vehicle was started. Used to determine if the last startup was a cold start. |
Start-up IAT | -- | Varies | Indicates the IAT at the time that the vehicle was started. Used to determine if the last startup was a cold start. The scan tool range is -39 to 140°C (-38 to 284°F). This parameter indicates the ambient air temperature at start-up. |
TAC Forced Engine Shutdown | -- | No | This parameter indicates the status of TAC control by the ECM. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault. |
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled. |
TAC Motor Command | -- | 15-25% | This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position. |
TB Idle Airflow Compensation | -- | 32% Varies | This parameter indicates the amount of airflow compensation in response to engine intake air flow restrictions. |
TCS Torque Request Signal | -- | 0% | Scan tool range 0-100 percent. Represents the PWM signal from the Electronic Brake and Traction Control Module. The EBTCM reduces the Traction Control Desired Torque signal pulse width when a drive wheel slippage situation is detected. The ECM monitors the Traction Control Desired Torque signal and reduces drive wheel slippage as necessary by retarding spark timing, decreasing boost sol. PWM, or increasing air/fuel ratio. The ECM can also turn OFF up to three fuel injectors if the Traction Control Desired Torque signal indicates a large enough amount of drive wheel slippage. |
TFT Sensor (If equipped) | -- | Varies | This parameter indicates the transmission fluid temperature measured by a sensor. In automatic transmission applications, this is based upon the transmission fluid temperature sensor input to the TCM. In manual transmission applications with a transmission fluid temperature sensor, this is based upon the transmission fluid temperature sensor input to the ECM. |
Torque Delivered Signal | -- | 2-6 ft lbs | Represents the PWM signal which indicates the available torque the engine is delivering to the drive wheels. The EBTCM monitors the Traction Control Torque signal to ensure that the ECM is responding properly to the Traction Control Desired Torque signal. |
Torque Management Spark | -- | 0% | This parameter indicates how much the ignition spark timing is being retarded to control torque by the ECM. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving. |
Total Knock Retard | -- | 0 Degrees | This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions. |
Total Misfire | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
TP Desired Angle | -- | 6% | The scan tool displays %. The scan tool displays 0-100 percent. The ECM indicates the desired throttle angle commanded by the vehicle operator. The scan tool indicates the desired throttle angle commanded by the vehicle operator. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 11% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Indicated Angle | -- | 6% | This parameter displays the angle of the TP in percent. This information is calculated by the ECM using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Performance Test | -- | OK | This parameter displays the status of the TP performance test by the ECM. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
TP Sensor 1 | -- | 4.06 Volts | This parameter displays the voltage signal sent to the ECM from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 1 of the TP sensor assembly. The scan tool will display a high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 3.27 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 0.80 Volts | ||
TP Sensor 1 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 1 in percent. This information is calculated by the ECM using the signal from the throttle position sensor 1. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 1 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the ECM this ignition cycle. |
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a ECM test that compares the signals from the TP sensors 1 and 2 . The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2. |
TP Sensor 2 | -- | 0.90 Volts | This parameter displays the voltage signal sent to the ECM from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 2 of the TP sensor assembly. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 1.69 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 4.16 Volts | ||
TP Sensor 2 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 2 in percent. This information is calculated by the ECM using the signal from the throttle position sensor 2. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 28% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 2 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 2 as determined by the ECM this ignition cycle. |
Vehicle Speed Sensor | -- | 0 km/h/mph | The scan tool range is 0-200 km/h (0-125 mph). This parameter displays the vehicle speed. The ECM receives reference pulses from the vehicle speed sensor (VSS) and converts them into km/h and mph for display. |
VTD Auto Learn Counter | -- | 0 Counts | This parameter indicates the number of auto-learn cycles that have been successfully completed within the immobilizer system. |
VTD Auto Learn Timer | -- | 0 Seconds | This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system. |
VTD Password Learn Enabled | -- | No | This parameter indicates if learning of the immobilizer secret information is enabled. |
VTD Security Code Accepted | -- | No | This parameter indicates that the received immobilizer system security code is correct. |
VTD Security Code Lockout | -- | Inactive | This parameter displays Active or Inactive. Security Code Lockout Active indicates that the security code has not passed and lockout is active. |
VTD Security Code Programmed | -- | No | This parameter indicates if the immobilizer system security code has been programmed. |
VTD Security Info. Programmed | -- | Yes | This parameter indicates if the immobilizer secret information, e.g. powertrain pre-release password, powertrain secret key, has been programmed. |
VTD System Status | -- | Dis. Neg. Resp. | This parameter indicates the current state of the immobilizer algorithm. The states include the following: Standby, Disabled at Startup, Disabled Due to No Response, Disabled Due to Negative Response, Disabled Due to Incorrect Response, Post Release, Pre-Release, Released. |
Warm-ups Since DTC Cleared | -- | Varies | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles since a DTC was cleared from memory. The scan tool displays counts. |
Warm-ups w/o Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without an emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing the information with a scan tool or a loss of power to the ECM also resets the counter to 0. The scan tool displays counts. This display indicates the number of warm-up cycles without a emission failure. |
Warm-ups w/o Non-Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without a non-emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the ECM also resets the counter to 0. |
Wide Open Throttle | -- | No | This parameter indicates the throttle status commanded by the ECM. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100%. |
Output Control | Description | ||||||
|---|---|---|---|---|---|---|---|
A/C Relay | The commanded states are ON or OFF. The command turns the A/C relay ON or OFF, which engages or disengages the A/C compressor clutch. | ||||||
CMP Actuator | Activates the CMP Actuator. Commands the desired CMP from 0-25 degrees in 5 degree increments. The commanded states include Increase and Decrease. The normal state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
CMP Actuator Solenoid | Activates the CMP Actuator. The commanded states include ON and OFF. The normal state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
Crankshaft Pos. Variation Learn | This output control is used to activate the crankshaft position variation learn (CASE) algorithm which calculates the reference pulse correction factors for the misfire diagnostic. | ||||||
Cylinder 1 | This function energizes or de-energizes the cylinder 1 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder 3 | This function energizes or de-energizes the cylinder 3 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder 5 | This function energizes or de-energizes the cylinder 5 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder Deactivation System | This function energizes or de-energizes all 3 VLOM solenoids for V3 or V6 mode. | ||||||
Cylinder Power Balance | Enables/disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met:
When DISABLE is selected, the control module turns the injector OFF for 30 seconds. | ||||||
Engine Controls Ignition Relay | Activates the Engine Controls Ignition Relay. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
Engine Speed Control | Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 500-1,950 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool. | ||||||
EVAP Purge/Seal | Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Purge Solenoid | Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Service Bay Test | Activates the on-board EVAP diagnostic test. | ||||||
EVAP Vent Solenoid | Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
Fan Relay 1 | The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF. | ||||||
Fan Relay 2 & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed. | ||||||
Fan Relays 1, 2, & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed. | ||||||
Fuel Composition Reset |
Important: Do not use this output control unless the actual alcohol content of the fuel in the tank is 10 percent or less. This will reset the learned alcohol composition to 0 percent in the engine control module (ECM). | ||||||
Fuel Injector Balance | Enables the fuel injector in order to verify proper fuel injector flow. The ECM will pulse the selected injector when the following conditions are met:
The selected fuel injector can only be flowed/pulsed once per ignition cycle. | ||||||
Fuel Pump Relay | Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running. | ||||||
Fuel Trim Enable | Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Reset | Activates the reset of fuel trim data in all fuel trim cells. | ||||||
GEN L-Terminal | The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. | ||||||
HO2S Heater Learn | This output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine off time, typically 12 or more hours. | ||||||
HO2S Heater Sensor 1 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
HO2S Heater Sensor 2 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
Idle Learn Reset | This output control is used to reset the learned airflow adaptive values to their initial values. | ||||||
Idle Spark | Disables and enables idle spark advance with the engine running. | ||||||
Loop Status | Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Malfunction Indicator Lamp | Activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool. | ||||||
Misfire Graphic | Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph. | ||||||
Oil Life Reset | The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life. | ||||||
RVS Disable History Reset | This output control is used to trigger the reset of the last 8 reasons the ECM has disabled remote vehicle start (RVS). | ||||||
Spark Retard | Controls the amount of spark retard. The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The normal commanded state is none. | ||||||
Starter Relay | This output control is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON. | ||||||
Throttle Position | Operates TAC motor in from 0-100 percent in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF. |
Engine Control Module Scan Tool Information V8 Gasoline
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic Trouble Code (DTC) List - Vehicle is completed. |
| • | No diagnostic trouble codes (DTCs) |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
5-Volt Reference 1 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 1 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 1 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
5-Volt Reference 2 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 2 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 2 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
A/C Disengage 1-8 History | -- | Varies | This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot. |
A/C High Side Pressure | -- | 1.43 Volts Varies | The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor. |
A/C On | 2.39 Volts Varies | ||
A/C High Side Pressure | -- | 868 kPa/125 psi Varies | The scan tool displays -103 to +3,119 kPa (-14 to +452 psi). This is the A/C refrigerant pressure sensor voltage signal converted to pressure. |
A/C On | 1568 kPa/227 psi Varies | ||
A/C Off for WOT | -- | No | This parameter indicates if the A/C system was commanded off for a wide open throttle event. |
A/C Pressure Disable | -- | No | The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi). |
A/C Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
A/C Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
A/C Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the A/C Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
A/C Relay Command | -- | Off | The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor clutch relay. |
With A/C Selected | On | ||
A/C Relay Request Signal | -- | No | The scan tool displays Yes or No. Yes is displayed when the HVAC control module is requesting A/C operation. |
With A/C Selected | Yes | ||
Air Flow Calculated | -- | 3-6 g/s | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s). |
Ambient Air Temperature | -- | Varies | This parameter displays an estimated outside air temperature at any given altitude in degrees centigrade (°C) and Fahrenheit (°F). The control module monitors the IAT and ECT sensors with the ignition ON to determine a starting outside temperature value. If the temperatures of each sensor are near each other the control module will update the ambient air temperature parameter to the new value. The control module will update the ambient air temperature parameter as the IAT temperature rises or falls during a drive trip. If an IAT sensor fault is detected, the ambient air temperature parameter will display a default temperature of 0°C (32°F). The ECM ambient air temperature value may be used by many control modules in order to allow certain diagnostic tests or functions to enable. |
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle, in percent, of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensors | -- | 0% | This parameter displays the average of the accelerator pedal position (APP) sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in percent. |
APP Sensor 1 | Accelerator pedal not actuated | 1.04 Volts | This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 4.27 Volts | ||
APP Sensor 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2 . The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions. |
APP Sensor 1 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the position of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensor 2 | Accelerator pedal not actuated | 0.47V | This parameter displays the voltage signal sent to the control module from APP sensor 2 of the APP sensor assembly. APP sensor 2 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 2.10 Volts | ||
APP Sensor 2 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the angle of the APP sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
BARO | -- | 60-104 kPa (varies with altitude) | This parameter displays the barometric pressure as calculated by the control module using the signal from the manifold absolute pressure (MAP) sensor measured when the ignition is turned on with the engine not running. The control module will update the barometric pressure during wide-open throttle (WOT) conditions. |
BPP Circuit Signal | -- | Released | The scan tool displays Applied or Released. This parameter shows the position of the brake pedal position sensor through the stop lamp switch signal circuit. |
Brake pedal depressed | Applied | ||
BPP Signal | -- | Released | The scan tool displays Applied, Released, or Invalid. This parameter shows the position of the brake pedal position sensor through the serial data bus. |
Brake pedal depressed | Applied | ||
Calc. TWC Temp. | -- | 446°C/834°F Varies | Calculated catalytic converter temperature. |
Catalyst Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No |
Catalyst Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
Catalytic Converter Protection Active | -- | No | This parameter displays the state of the Catalytic Converter Protection mode. |
Change Engine Oil Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the Change Engine Oil indicator as commanded by the ECM. |
CKP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position (CKP) sensor. |
CKP Resync Counter | -- | 0 Counts | This parameter displays the number of times the control module has to resynchronize the CKP sensor. |
CKP Sensor | -- | Same as Engine Speed | This parameter displays the engine speed as calculated by the control module using the signal from the CKP sensor. |
Cmmd. A/F Equivalence Ratio | -- | 1.0:1 | Equivalence numbers greater than one represent excess fuel in the fuel air mix. Equivalence numbers less than one represent a deficiency of fuel in the fuel air mix for complete combustion. The equivalence ratio will be reported as one when the vehicle is in Closed Loop. |
CMP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the control module receives a signal from the Camshaft position (CMP) sensor. |
CMP Angle | -- | 0° | This parameters shows the actual amount, in camshaft degrees, of camshaft actuation. |
CMP Command | -- | 0% | This parameters shows the commanded percentage of the CMP actuator, by the control module. |
CMP Sensor | -- | Same as Engine Speed | This parameter displays the speed of the engine as calculated by the signal from the CMP sensor. |
CMP Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
CMP Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
CMP Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
CMP Variance | -- | 0.0° | This parameter shows the difference, in degrees of camshaft actuation, between the desired camshaft position and the actual position. |
Cold Startup | -- | Varies | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle. |
Cooling Fan Command | -- | 0-100% Varies | This parameter displays the amount of fan power commanded by the ECM. |
Crank Request Signal | -- | No | This parameter shows the power mode status of the starter motor. When Yes is displayed, a request to engage the starter has been received by the ECM. |
Ignition switch in the crank position | Yes | ||
Cruise Disengage 1-8 History | -- | Varies | These parameters indicate the last 8 reasons the ECM disengaged the cruise control. Reason 1 contains the most recent reason. The reasons include the following: Brake Pedal Initialize, Cancel, Clutch, Coast Disengage, Coast Speed Low, TAC Inhibit, Accel Rate, Decel Rate, High Speed, Illegal Mode, Low Speed, None, Cruise Sw OFF, Over Set Speed, S/C On Speed Hi, ECM Inhibit, Simul S/C-R/A, TCS, Under Set Speed, DLC Override, Memory DTC, Eng Run Time, Engine Speed, DTC Set, RPM Limit, First Gear, APP Override, Low Voltage, D Whl Spd Low, D Whl Spd Hi, Cruise S/S, Cruise Sw Data, ECT Overtemp, VSES, Trans. DTC, BPP Data, BPP DTC, Park Brake, ACC Inhibit, ACC Brake DTC, ACC Option, ACC Brake Inop, PTO Active. |
Cruise Cancel Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Control Active | -- | No | This parameter displays the status of the cruise control system as determined by the control module. The scan tool will display Yes when the cruise control system is in control of vehicle speed. The scan tool will display No when the cruise control system is not operating. |
Cruise On/Off Switch | -- | Off | The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | On | ||
Cruise Resume/Accel. Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Set/Coast Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cycles of Misfire Data | -- | 0-100 Counts incrementing | This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the control module. |
Cyl. Deact. Disable 1-8 History | -- | Varies | This parameter shows the reason the Active Fuel Management system changed from V3 mode to V6 mode, for the last 8 occurrences. Reasons displayed include: None, MAP Low, Brake Vac Low, APP Rate High, APP High, Ign. Voltage, Eng Oil Press, Eng Oil Temp, Eng Coolant Temp, Engine Speed, Trans. Gear, Trans. Range, Trans. Shifting, DLC Override, Min Time All Cyl, Max Deact Time, Oil Aeration, DFCO Active, Inj Stable Time, Heater Perf, MAP DTC, Brk Vac Sen DTC, TAC DTC, EOP DTC, ECT DTC, IAT DTC, VSS DTC, Deact Sol DTC, Misfire DTC, CKP DTC, CMP DTC, EC Ign Relay DTC, Torq Reduction, Axle Torq Limit, ECT Overtemp, TWC Overtemp, Piston Protect, Coolant Hot, RPM Limit. |
Cyl. Deactivation Cycles | -- | Varies | This parameter displays the number of times the engine switches between V6 mode, and V3 mode during each ignition cycle. The counter will reset to zero and increment again, if the count reaches 255 during the current ignition cycle. |
Cyl. Deact. Performance Test | -- | OK | This parameter displays OK if all the Active Fuel Management enabling conditions are met. The parameter displays Fault if one or more enabling conditions are out of range. |
Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Cylinder Deactivation solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 1, 4, 6, or 7 Deact. Sol. Command | -- | Off | This parameter displays ON when V3 mode is commanded or OFF when V6 mode is commanded. |
Cyl. Deact. System Command | -- | V6 | This parameter displays V6 when all three Active Fuel Management (AFM) cylinder solenoids are deactivated or V3 when the AFM cylinder solenoids are activated. |
Cyl. 1-8 Inj. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1-8 Inj. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1-8 Inj. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Fuel Injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 1-8 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1-8 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1-8 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Deactivation Inhibit A/C Clutch ON | -- | No | The scan tool will display Yes if the A/C clutch ON is inhibiting cylinder deactivation. |
Deactivation Inhibit Acceleration Tip In | -- | No | The scan tool will display Yes if acceleration tip in is inhibiting cylinder deactivation. |
Deactivation Inhibit APP High | -- | No | The scan tool will display Yes if the APP sensor is at a higher than acceptable range and is inhibiting cylinder deactivation. |
Deactivation Inhibit Axle Torque Limiting | -- | No | The scan tool will display Yes if axle torque limiting is inhibiting cylinder deactivation. |
Deactivation Inhibit Brake Booster Pressure Sensor DTC | -- | No | The scan tool will display Yes if a brake booster pressure DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Calculated Torque | -- | No | The scan tool will display Yes if calculated torque is inhibiting cylinder deactivation. |
Deactivation Inhibit CKP Sensor DTC | -- | No | The scan tool will display Yes if a CKP sensor DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit CMP Sensor DTC | -- | No | The scan tool will display Yes if a CMP sensor DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Cylinder Deactivation Solenoid DTC | -- | No | The scan tool will display Yes if a Cylinder Deactivation Solenoid DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit DFCO Active | -- | No | The scan tool will display Yes if Decel Fuel Cut-Off is inhibiting cylinder deactivation. |
Deactivation Inhibit DLC Override | -- | No | The scan tool will display Yes if the DLC override is inhibiting cylinder deactivation. |
Deactivation Inhibit EC Ignition Relay DTC | -- | No | The scan tool will display Yes if the EC ignition relay is inhibiting cylinder deactivation. |
Deactivation Inhibit ECT | -- | No | The scan tool will display Yes if engine coolant temperature is inhibiting cylinder deactivation. |
Deactivation Inhibit ECT Sensor | -- | No | The scan tool will display Yes if the ECT sensor is inhibiting cylinder deactivation. |
Deactivation Inhibit Engine Oil | -- | No | The scan tool will display Yes if low engine oil is inhibiting cylinder deactivation. |
Deactivation Inhibit Engine Overtemperature Protection | -- | No | The scan tool will display Yes if engine temperature is inhibiting cylinder deactivation. |
Deactivation Inhibit Engine RPM | -- | No | The scan tool will display Yes if engine RPM is inhibiting cylinder deactivation. |
Deactivation Inhibit EOP | -- | No | The scan tool will display Yes if engine oil pressure is inhibiting cylinder deactivation. |
Deactivation Inhibit EOP Sensor | -- | No | The scan tool will display Yes if the EOP sensor is inhibiting cylinder deactivation. |
Deactivation Inhibit Heater Performance | -- | No | The scan tool will display Yes if is inhibiting cylinder deactivation. |
Deactivation Inhibit Hot Coolant Mode | -- | No | The scan tool will display Yes if vehicle hot coolant mode is inhibiting cylinder deactivation. |
Deactivation Inhibit IAT Sensor DTC | -- | No | The scan tool will display Yes if an IAT DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Ignition Voltage | -- | No | The scan tool will display Yes if is inhibiting cylinder deactivation. |
Deactivation Inhibit Injector Stable Time | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Low Brake Booster Vacuum | -- | No | The scan tool will display Yes if low booster vacuum is inhibiting cylinder deactivation. |
Deactivation Inhibit Low Speed | -- | No | The scan tool will display Yes if vehicle speed is inhibiting cylinder deactivation. |
Deactivation Inhibit Manifold Vacuum Low | -- | No | The scan tool will display Yes if low manifold vacuum is inhibiting cylinder deactivation. |
Deactivation Inhibit MAP Sensor DTC | -- | No | The scan tool will display Yes if a MAP DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Maximum Deactivation Time Exceeded | -- | No | The scan tool will display Yes if the maximum deactivation time is inhibiting cylinder deactivation. |
Deactivation Inhibit Minimum Time after TAC DTC | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Minimum Time on All Cylinders | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Misfire DTC | -- | No | The scan tool will display Yes if a misfire DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Oil Aeration | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Piston Protection | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit HO2S 2 Test | -- | No | The scan tool will display Yes if an HO2S 2 test is inhibiting cylinder deactivation. |
Deactivation Inhibit RPM Limit | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit TAC System DTC | -- | No | The scan tool will display Yes if a TAC DTC is inhibiting cylinder deactivation. |
Deactivation Inhibit Torque Reduction | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Transmission Gear | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit Transmission Range | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Transmission Shifting | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit TWC Overtemperature Protection | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit TWC Temperature Low | -- | No | The scan tool will display Yes if inhibiting cylinder deactivation. |
Deactivation Inhibit VSS DTC | -- | No | The scan tool will display Yes if a VSS DTC is inhibiting cylinder deactivation. |
Decel. Fuel Cutoff | -- | Inactive | This parameter displays the status of the operating mode used to turn off the fuel injectors during certain deceleration conditions. When the scan tool displays Active, the control module has turned off the fuel injectors. When the scan tool displays Inactive, the fuel system is operating normally. |
Desired CMP | -- | 0° | This parameter displays the desired camshaft position, in degrees, as calculated by the control module. |
Desired Idle Speed | -- | 768 RPM | This parameter displays the engine idle speed in RPM commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine RPM at idle. This parameter is not valid unless the engine is running. |
Distance with Cyl. Activated | -- | Varies | This parameter displays the total distance, in kilometers (km) or miles (mi), the vehicle traveled in V6 mode for the current ignition cycle. |
Distance with Cyl. Deactivated | -- | Varies | This parameter displays the total distance, in kilometers (km) or miles (mi), the vehicle traveled in V3 mode for the current ignition cycle. |
Distance Since DTC Cleared | -- | Varies | This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven. |
EC Ign. Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EC Ign. Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EC Ign. Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the Engine Control Ignition Relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EC Ignition Relay Feedback Signal | -- | 13.0-14.2 Volts | This parameter displays the voltage signal sent to the control module from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF. |
EC Ignition Relay Command | -- | On | This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module. |
ECM Authentication Status | -- | Valid | This parameter indicates the result of the comparison between the last received immobilizer system response and the expected response calculated by the ECM. |
ECM Challenge Status | -- | Invalid | This parameter shows the immobilizer system status of the ECM challenge. This indicates whether the currently calculated ECM challenge is valid. |
ECM Response Source | -- | Normal | The parameter indicates the source used to calculate the ECM response. The sources include Normal Start, Remote Vehicle Start, PTO Remote Start. |
ECT Sensor | -- | 96-103°C / 204-217°F | This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature sensor. When the coolant temperature is low, the scan tool will display a low temperature. When the coolant temperature is high, the scan tool will display a high temperature. |
Engine Load | -- | Varies | This parameter displays the engine load in percent based on inputs to the control module from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load. |
Engine Oil Pressure Sensor | -- | 137-193 kPa / 20-28 psi | This parameter displays the engine oil pressure. |
Engine Oil Pressure Sensor | -- | 1.39 Volts Varies | This parameter displays the engine oil pressure sensor output in volts. |
Engine Oil Level Switch | -- | OK | This parameter indicates if the Engine oil level is OK or Low. |
Engine Oil Life Remaining | -- | Varies | This parameter indicates the percentage of time left before an oil change is necessary according to the oil life monitor. |
Engine Oil Temperature Calculated | -- | 109°C/228°F Varies | This parameter displays the engine oil temperature. |
Engine Off Time | -- | Varies | This parameter displays the time elapsed since the engine was shut OFF. |
Engine Run Time | -- | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running. |
Engine Speed | -- | 750-800 RPM | This parameter displays the speed of the crankshaft as determined by the control module using an input from the crankshaft position (CKP) sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds. |
EPM Inhibit Reason | -- | Varies | This parameter displays the reason for the regulated voltage control (RVC) override command. RVC lowers system operating voltage to reduce the system electrical load and improve fuel economy performance. The RVC command will be overridden if the voltage commanded is below the minimum system voltage required to ensure that the fuel demand, powertrain OBD diagnostics, airflow measurement, cylinder deactivation, or transmission control module functions will execute properly. Reasons include the following: None, Device Control, Fuel Demand, OBD Diagnostics, Airflow Measurement, Cylinder Deactivation, Transmission Control Module Request. |
EVAP Fault History | -- | No Fault | This parameter displays the result of the evaporative emission (EVAP) system diagnostic. Scan tool displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK, WEAK VACUUM, or NO TEST RESULT. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM. |
EVAP Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Purge Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Purge Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Purge Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP Purge Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Purge Solenoid Command | -- | 10-15% Varies | This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the control module expressed as a percent. The scan tool will display a high percentage when the control module is commanding the EVAP purge solenoid to be open a large amount . The scan tool will display a low percentage when the control module is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the control module is commanding the EVAP purge solenoid closed. |
EVAP Vent Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Vent Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Vent Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP Vent Solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Vent Solenoid Command | -- | Venting | This parameter displays the state of the EVAP vent solenoid commanded by the control module expressed as a Venting or Not Venting. The scan tool will display a venting when the control module is commanding the EVAP vent solenoid to be open . The scan tool will display a not venting when the control module is commanding the EVAP vent solenoid to be closed. |
Ext. Travel BPP Signal | -- | Released | This parameter displays Applied, Released, or Invalid. A state of Applied indicates the brake pedal position sensor has traveled beyond a moderate, extended threshold as determined by the brake sensing module and received over serial data. |
Brake Pedal firmly applied | Applied | ||
FC Relay 1 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 1 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 1 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 1 Command | -- | On | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
FC Relay 2 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 2 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 2 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 2 Command | -- | On | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
FC Relay 3 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 3 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 3 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 3 Command | -- | On | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
FC Relay 2 and 3 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 2 and 3 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 2 and 3 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 2 and 3 Command | -- | Off | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
Fuel Alcohol Content | -- | Varies | This parameter displays the percentage of alcohol in the fuel. The value is calculated by the ECM using various sensor inputs. |
Fuel Composition Learn | -- | Inactive | This parameter displays Active or Inactive. Active will be displayed if the ECM is learning the alcohol content of the fuel. |
Fuel Level Sensor | -- | Varies | This parameter displays the approximate fuel level in the fuel tank as a voltage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Fuel Pump Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Fuel Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Fuel Pump Relay Command | -- | On | This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be on when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be off when the scan tool indicates the Fuel Pump Relay Command is Off. |
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as a percentage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Tank Pressure Sensor | -- | -19.8 to +12.52 mm Hg/-10.5 to +6.17 in H2O | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high. |
Fuel Tank Pressure Sensor | -- | 0.2-4.0 V | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low. |
Fuel Tank Rated Capacity | -- | 64.2 Liters/17 Gallons | This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle. |
Fuel Trim Cell | -- | 0 | This parameter displays the fuel trim cell number as calculated by the control module based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load. |
Fuel Trim Learn | -- | Enabled | This parameter indicates if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled. |
Fuel Trim System Test State | -- | Varies | This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test. |
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low. |
GEN F-Terminal Signal | -- | 45% Varies with electrical load | This parameter is an ECM input of the generator field duty cycle. This is an indication of generator load on the engine. |
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
GEN L-Terminal Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
GEN L-Terminal Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
GEN L-Terminal Command | -- | 65% Varies with electrical load | The scan tool displays 0-100 percent. The scan tool displays the percentage of the output voltage of the generator. |
GEN L-Terminal Signal Command | -- | On | This parameter indicates the generator commanded state by the ECM. |
Hood Position | -- | Closed | This parameter indicates the status of the hood switch. The scan tool displays CLOSED with the hood closed. The scan tool will display OPEN when the hood is open. |
HO2S Heater Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S Heater Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S/O2S Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S/O2S Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S 1 | -- | 50-950 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S 1 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. |
HO2S 1 Heater | -- | 0.76 Amps | This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S Heater Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. |
HO2S 1 Heater Command | -- | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. |
HO2S 1 Heater Command | -- | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. |
HO2S 1 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 1 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 1 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HO2S 2 | 50-850 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. | |
HO2S 2 Heater | 0.76 Amps | This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S Heater Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. | |
HO2S 2 Heater Command | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. | |
HO2S 2 Heater Command | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. | |
HO2S 2 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 2 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 2 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HOT Open Loop | -- | Inactive | This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally. |
IAT Sensor | -- | Varies | The scan tool displays °C/F. The ECM converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. Intake air temp is used by the ECM to adjust fuel delivery and spark timing according to incoming air density. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The ECM converts the resistance of the intake air temperature sensor to degrees. The ECM uses the IAT in order to adjust fuel delivery and spark timing according to incoming air density. |
Ignition OFF Time | -- | Minutes | This parameter displays the amount of minutes the engine has been OFF. |
Ignition 1 Signal | -- | 13-14.2 Volts | This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position. |
Ignition Accessory Signal | -- | On | This parameter displays the state of the ignition 0 input to the control module from the ignition switch. The scan tool will display On when the ignition switch is in the ignition accessory position. The scan tool will display Off when the ignition switch is in any other position. |
Inj. 1-8 Disabled Due to Misfire | -- | No | This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire. |
Injector PWM | -- | 1.55-1.85 ms | The scan tool displays mS. Indicates the base PWM or ON time of the fuel injectors in milliseconds. When the engine load is increased, the injector pulse width will increase. Indicates the amount of time the PCM is commanding each injector ON during each engine cycle. A longer injector pulse width will cause more fuel to be delivered. Injector pulse width should increase with increased engine load. |
Intake Manifold Pressure | -- | Varies | This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or high load cruising. |
Knock Detected Cyl. 1-8 | -- | No | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event. |
Knock Retard | -- | 0 Degrees | The scan tool displays °. Indicates the amount of spark the PCM is removing from ignition control (IC) spark advance in response to the signal from the knock sensors. The traction control system desired torque signal from the electronic brake and traction control module (EBTCM) may cause knock retard to display a value more than 0.0 degrees if traction control is active. |
Long Term FT | -- | -10 to +10% | The scan tool range is -99 to +99 percent . This parameter indicates the Long Term fuel trim (FT) correction for bank 1 as commanded by the PCM. A change made to the fuel delivery will be indicated by the Long and Short Term FT values. The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Loop Status | -- | Closed | Closed loop indicates that the PCM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the PCM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and MAF sensor inputs only. |
Low Engine Oil Level Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil level indicator as monitored by the ECM. |
Low EOP Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil pressure indicator as monitored by the ECM. |
LT FT Test Avg. | -- | 0.68% | This parameter is the average long term fuel trim for this bank as calculated by the control module. The scan tool will display a value more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0, indicating time is being subtracted from the injector pulse width, reducing the amount of fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio. |
LT FT Test Avg. w/o purge | -- | 1.02% | This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will display a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event |
MAF Performance Test | -- | OK | This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAF Sensor | -- | 3-6 g/s (varies with altitude) | The scan tool displays g/s. The scan tool displays a range of 0.0-655 g/s. The mass air flow (MAF) is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine. |
MAF Sensor | -- | 1,200-1,300 Hz (varies with altitude) | The scan tool displays a range of 0-31,999 Hz. The MAF sensor is a hot wire type air flow sensor. The ECM converts current draw needed by the MAF to keep the hot wires at a constant into a frequency signal. The scan tool displays this frequency in a hertz signal. |
MAP Performance Test 1 | -- | OK | This parameter displays the status of the MAP performance test 1 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Performance Test 2 | -- | OK | This parameter displays the status of the MAP performance test 2 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Sensor | -- | 20-48 kPa (varies with altitude) | The scan tool displays kPa. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MAP Sensor | -- | 0.4-2.0V (varies with altitude) | The scan tool displays Volts. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
MIL Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
MIL Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
MIL Command | -- | Off | This parameter displays the commanded state of the MIL control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check. |
MIL Requested by DTC | -- | No | This parameter shows if the illumination of the MIL has been requested by a failed diagnostic trouble code (DTC). |
Misfire Current Cyl. 1-8 | -- | 0 Counts | The scan tool displays 0-255 counts. The display shows the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers. |
Misfire History Cyl. 1-8 | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
PNP Switch | -- | Park/Neutral | The scan tool displays the position of the transmission selection as Park/Neutral or In Gear. |
Power Enrichment | -- | Inactive | Scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in Power Enrichment mode. The PCM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occurring during acceleration. |
Output Shaft Speed Sensor | -- | 0 RPM | The parameter shows the transmission output speed, the speed at the output of the gear box, determined from the speed measured by the transmission output speed (TOS) sensor with the application of the factors to account for the location of the sensor, e.g. after the gear box, after the final chain, after the transfer case, after the final drive, etc. In applications that include both a transmission output speed sensor and a transfer case speed sensor, this parameter will apply specifically to the output of the transmission. |
Reduced Engine Power | -- | Inactive | The scan tool displays Active or Inactive. The scan tool displays Active when the PCM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The PCM limits the engine power. |
RVS Disable 1-8 History | -- | Varies | These parameters show the last 8 reasons the ECM disabled remote vehicle start (RVS). Reason 1 is the most current reason. |
RVS Request Signal | -- | Off | This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode. |
Short Term FT | -- | -10 to +10% | The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT . The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Spark | -- | 18-24 Degrees | The scan tool displays a range of -64 to +64°. The scan tool displays the amount of degrees the PCM commands. The PCM computes the desired spark advance using the following: (1) ECT, (2) engine speed (RPM), (3) load, (4) vehicle speed. The PCM adjusts the timing. A negative (-) value indicates degrees before top dead center (BTDC) or spark advance; a positive value indicates degrees after top dead center (ATDC) or spark retard. |
ST FT Test Avg. | -- | 0.98-1.00% | This parameter is calculated by the control module based on an intrusive test by the control module. The Short Term FT Test Average used for the short term correction of the fuel delivery. The scan tool will display a high value for a large amount of short term fuel correction, and 0% for no short term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. |
Starter Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Starter Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Starter Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Starter Relay Command | -- | Off | The scan tool displays ON or OFF. This displays the commanded state of the starter relay by the ECM. |
Ignition switch in the crank position | On | ||
Start-up ECT | -- | Varies | Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The scan tool displays the engine ECT at the time the engine was started. The PCM uses start-up ECT for certain DTCs. Indicates the engine coolant temperature at the time that the vehicle was started. Used to determine if the last startup was a cold start. |
Start-up IAT | -- | Varies | Indicates the IAT at the time that the vehicle was started. Used to determine if the last startup was a cold start. The scan tool range is -39 to 140°C (-38 to 284°F). This parameter indicates the ambient air temperature at start-up. |
TAC Forced Engine Shutdown | -- | No | This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault. |
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled. |
TAC Motor Command | -- | 15-25% | This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position. |
TB Idle Airflow Compensation | -- | 32% Varies | This parameter indicates the amount of airflow compensation in response to engine intake air flow restrictions. |
TCS Torque Request Signal | -- | 0% | Scan tool range 0-100 percent. Represents the PWM signal from the Electronic Brake and Traction Control Module. The EBTCM reduces the Traction Control Desired Torque signal pulse width when a drive wheel slippage situation is detected. The ECM monitors the Traction Control Desired Torque signal and reduces drive wheel slippage as necessary by retarding spark timing, decreasing boost sol. PWM, or increasing air/fuel ratio. The ECM can also turn OFF up to three fuel injectors if the Traction Control Desired Torque signal indicates a large enough amount of drive wheel slippage. |
TFT Sensor (If equipped) | -- | Varies | This parameter indicates the transmission fluid temperature measured by a sensor. In automatic transmission applications, this is based upon the transmission fluid temperature sensor input to the TCM. In manual transmission applications with a transmission fluid temperature sensor, this is based upon the transmission fluid temperature sensor input to the ECM. |
Torque Delivered Signal | -- | 2-6 ft lbs | Represents the PWM signal which indicates the available torque the engine is delivering to the drive wheels. The EBTCM monitors the Traction Control Torque signal to ensure that the ECM is responding properly to the Traction Control Desired Torque signal. |
Torque Management Spark | -- | 0% | This parameter indicates how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving. |
Total Knock Retard | -- | 0 Degrees | This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions. |
Total Misfire | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
TP Desired Angle | -- | 6% | The scan tool displays %. The scan tool displays 0-100 percent. The PCM indicates the desired throttle angle commanded by the vehicle operator. The scan tool indicates the desired throttle angle commanded by the vehicle operator. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 11% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Indicated Angle | -- | 6% | This parameter displays the angle of the TP in percent. This information is calculated by the control module using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Performance Test | -- | OK | This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
TP Sensor 1 | -- | 4.06 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 1 of the TP sensor assembly. The scan tool will display a high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 3.27 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 0.80 Volts | ||
TP Sensor 1 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 1 in percent. This information is calculated by the control module using the signal from the throttle position sensor 1. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 1 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle. |
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2 . The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2. |
TP Sensor 2 | -- | 0.90 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 2 of the TP sensor assembly. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 1.69 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 4.16 Volts | ||
TP Sensor 2 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 2 in percent. This information is calculated by the control module using the signal from the throttle position sensor 2. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 28% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 2 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle. |
Vehicle Speed Sensor | -- | 0 km/h/mph | The scan tool range is 0-200 km/h (0-125 mph). This parameter displays the vehicle speed. The PCM receives reference pulses from the vehicle speed sensor (VSS) and converts them into km/h and mph for display. |
VTD Auto Learn Counter | -- | 0 Counts | This parameter indicates the number of auto-learn cycles that have been successfully completed within the immobilizer system. |
VTD Auto Learn Timer | -- | 0 Seconds | This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system. |
VTD Password Learn Enabled | -- | No | This parameter indicates if learning of the immobilizer secret information is enabled. |
VTD Security Code Accepted | -- | No | This parameter indicates that the received immobilizer system security code is correct. |
VTD Security Code Lockout | -- | Inactive | This parameter displays Active or Inactive. Security Code Lockout Active indicates that the security code has not passed and lockout is active. |
VTD Security Code Programmed | -- | No | This parameter indicates if the immobilizer system security code has been programmed. |
VTD Security Info. Programmed | -- | Yes | This parameter indicates if the immobilizer secret information, e.g. powertrain pre-release password, powertrain secret key, has been programmed. |
VTD System Status | -- | Dis. Neg. Resp. | This parameter indicates the current state of the immobilizer algorithm. The states include the following: Standby, Disabled at Startup, Disabled Due to No Response, Disabled Due to Negative Response, Disabled Due to Incorrect Response, Post Release, Pre-Release, Released. |
Warm-ups Since DTC Cleared | -- | Varies | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles since a DTC was cleared from memory. The scan tool displays counts. |
Warm-ups w/o Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without an emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing the information with a scan tool or a loss of power to the PCM also resets the counter to 0. The scan tool displays counts. This display indicates the number of warm-up cycles without a emission failure. |
Warm-ups w/o Non-Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without a non-emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also resets the counter to 0. |
Wide Open Throttle | -- | No | This parameter indicates the throttle status commanded by the control module. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100%. |
Output Control | Description | ||||||
|---|---|---|---|---|---|---|---|
A/C Relay | The commanded states are ON or OFF. The command turns the A/C relay ON or OFF, which engages or disengages the A/C compressor clutch. | ||||||
Crankshaft Pos. Variation Learn | This output control is used to activate the crankshaft position variation learn (CASE) algorithm which calculates the reference pulse correction factors for the misfire diagnostic. | ||||||
Cylinder 1 | This function energizes or de-energizes the cylinder 1 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder 4 | This function energizes or de-energizes the cylinder 4 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder 6 | This function energizes or de-energizes the cylinder 6 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder 7 | This function energizes or de-energizes the cylinder 7 VLOM solenoid. The commanded states include ON and OFF. The normal state is NONE. | ||||||
Cylinder Deactivation System | This function energizes or de-energizes all 3 VLOM solenoids for V3 or V6 mode. | ||||||
Cylinder Power Balance | Enables/disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met:
When DISABLE is selected, the control module turns the injector OFF for 30 seconds. | ||||||
Engine Controls Ignition Relay | Activates the Engine Controls Ignition Relay. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
Engine Speed Control | Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 500-1,950 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool. | ||||||
EVAP Purge/Seal | Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Purge Solenoid | Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Service Bay Test | Activates the on-board EVAP diagnostic test. | ||||||
EVAP Vent Solenoid | Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
Fan Relay 1 | The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF. | ||||||
Fan Relay 2 & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed. | ||||||
Fan Relays 1, 2, & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed. | ||||||
Fuel Injector Balance | Enables the fuel injector in order to verify proper fuel injector flow. The ECM will pulse the selected injector when the following conditions are met:
The selected fuel injector can only be flowed/pulsed once per ignition cycle. | ||||||
Fuel Pump Relay | Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running. | ||||||
Fuel Trim Enable | Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Reset | Activates the reset of fuel trim data in all fuel trim cells. | ||||||
GEN L-Terminal | The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. | ||||||
HO2S Heater Learn | This output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine off time, typically 12 or more hours. | ||||||
HO2S Heater Sensor 1 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
HO2S Heater Sensor 2 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
Idle Learn Reset | This output control is used to reset the learned airflow adaptive values to their initial values. | ||||||
Idle Spark | Disables and enables idle spark advance with the engine running. | ||||||
Loop Status | Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Malfunction Indicator Lamp | Activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool. | ||||||
Misfire Graphic | Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph. | ||||||
Oil Life Reset | The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life. | ||||||
RVS Disable History Reset | This output control is used to trigger the reset of the last 8 reasons the ECM has disabled remote vehicle start (RVS). | ||||||
Spark Retard | Controls the amount of spark retard. The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The normal commanded state is none. | ||||||
Starter Relay | This output control is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON. | ||||||
Throttle Position | Operates TAC motor in from 0-100 percent in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF. |
Engine Control Module Scan Tool Information RPO LZ4 and LZE
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No diagnostic trouble codes (DTCs) |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
5-Volt Reference 1 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 1 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 1 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
5-Volt Reference 2 | -- | 5.0 Volts | This parameter displays the voltage sensed on the 5-volt reference 2 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. |
5-Volt Reference 2 Circuit Status | -- | OK | This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present. |
A/C Disengage 1-8 History | -- | Varies | This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot. |
A/C High Side Pressure | -- | 1.43 Volts Varies | The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor. |
A/C On | 2.39 Volts Varies | ||
A/C High Side Pressure | -- | 868 kPa / 125 psi Varies | The scan tool displays -103 to +3,119 kPa (-14 to +452 psi). This is the A/C refrigerant pressure sensor voltage signal converted to pressure. |
A/C On | 1568 kPa / 227 psi Varies | ||
A/C Off for WOT | -- | No | This parameter indicates if the A/C system was commanded off for a wide open throttle event. |
A/C Pressure Disable | -- | No | The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi). |
A/C Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
A/C Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
A/C Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
A/C Relay Command | -- | Off | The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor clutch relay. |
With A/C Selected | On | ||
A/C Relay Request Signal | -- | No | The scan tool displays Yes or No. Yes is displayed when the HVAC control module is requesting A/C operation. |
With A/C Selected | Yes | ||
Air Flow Calculated | -- | 3-6 g/s | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s). |
AIR Indicated Pressure | -- | 0.00 kPa | This parameter displays the normalized secondary air injection system pressure. The normalized pressure is the filtered pressure minus the ambient air pressure measured by the sensor. |
AIR Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non continuous legislated emission related monitor. The states include: Yes or No. |
AIR Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non continuous legislated emission related monitor. The states include: Yes or No. |
AIR Pressure Sensor | -- | Same as BARO | This parameter displays the unfiltered secondary air injection system pressure. |
AIR Pressure Sensor | -- | 2.6 volts near sea level, varies with altitude | This parameter displays the secondary air injection system pressure analog input as a percentage of its reference voltage. |
AIR Pressure Sensor Variance | -- | 0.00 kPa | This parameter displays the weighted average pressure error (difference between the predicted and actual secondary air injection system pressure) during the secondary air injection on test (phase 1). |
AIR Pump Relay Ckt Short Volts Test Status | -- | Not Run | This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
AIR Pump Relay Ckt Short Gnd Test Status | -- | Not Run | This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
AIR Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
AIR Pump Relay Command | -- | OFF | This parameter displays the commanded state of the secondary air injection pump. The states include: On or Off. |
AIR Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
AIR Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
AIR Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
AIR Solenoid Command | -- | OFF | This parameter displays the commanded state of the secondary air injection valve. The states include: On or Off. |
Ambient Air Temperature | -- | Varies | Outside temperature at any given altitude expressed in degrees centigrade (°C) and Fahrenheit (°F). |
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle, in percent, of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensors | -- | 0% | This parameter displays the average of the accelerator pedal position (APP) sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in percent. |
APP Sensor 1 | Accelerator pedal not actuated | 1.04 Volts | This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 4.27 Volts | ||
APP Sensor 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2 . The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions. |
APP Sensor 1 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the position of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
APP Sensor 2 | Accelerator pedal not actuated | 0.47 V | This parameter displays the voltage signal sent to the control module from APP sensor 2 of the APP sensor assembly. APP sensor 2 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 2.10 Volts | ||
APP Sensor 2 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the angle of the APP sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. |
Accelerator pedal fully actuated | 100% | ||
BARO | -- | 60-104 kPa (varies with altitude) | This parameter displays the barometric pressure as calculated by the control module using the signal from the manifold absolute pressure (MAP) sensor measured when the ignition is turned on with the engine not running. The control module will update the barometric pressure during wide-open throttle (WOT) conditions. |
BPP Circuit Signal | -- | Released | The scan tool displays Applied or Released. This parameter shows the position of the brake pedal position sensor through the stop lamp switch signal circuit. |
Brake pedal depressed | Applied | ||
BPP Signal | -- | Released | The scan tool displays Applied, Released, or Invalid. This parameter shows the position of the brake pedal position sensor through the serial data bus. |
Brake pedal depressed | Applied | ||
Calc. TWC Temp. | -- | 446°C/834°F Varies | Calculated catalytic converter temperature. |
Catalyst Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No |
Catalyst Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
Catalytic Converter Protection Active | -- | No | This parameter displays the state of the Catalytic Converter Protection mode. |
Change Engine Oil Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the Change Engine Oil indicator as commanded by the ECM. |
CKP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position (CKP) sensor. |
CKP Resync Counter | -- | 0 Counts | This parameter displays the number of times the control module has to resynchronize the CKP sensor. |
CKP Sensor | -- | Same as Engine Speed | This parameter displays the engine speed as calculated by the control module using the signal from the CKP sensor. |
Cmmd. A/F Equivalence Ratio | -- | 1.0:1 | Equivalence numbers greater than one represent excess fuel in the fuel air mix. Equivalence numbers less than one represent a deficiency of fuel in the fuel air mix for complete combustion. The equivalence ratio will be reported as one when the vehicle is in Closed Loop. |
CMP Active Counter | -- | 0-255 Counts incrementing | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
CMP Angle | -- | 0° | This parameters shows the actual amount, in camshaft degrees, of camshaft actuation. |
CMP Command | -- | 0% | This parameters shows the commanded percentage of the CMP actuator, by the control module. |
CMP Sensor | -- | Same as Engine Speed | This parameter displays the speed of the engine as calculated by the signal from the CMP sensor. |
CMP Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
CMP Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
CMP Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
CMP Variance | -- | 0.0° | This parameter shows the difference, in degrees of camshaft actuation, between the desired camshaft position and the actual position. |
Cold Startup | -- | Varies | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle. |
Cooling Fan Command | -- | 0-100% Varies | This parameter displays the amount of fan power commanded by the ECM. |
Crank Request Signal | -- | No | This parameter shows the power mode status of the starter motor. When Yes is displayed, a request to engage the starter has been received by the ECM. |
Ignition switch in the crank position | Yes | ||
Cruise Disengage 1-8 History | -- | Varies | These parameters indicate the last 8 reasons the ECM disengaged the cruise control. Reason 1 contains the most recent reason. The reasons include the following: Brake Pedal Initialize, Cancel, Clutch, Coast Disengage, Coast Speed Low, TAC Inhibit, Accel Rate, Decel Rate, High Speed, Illegal Mode, Low Speed, None, Cruise Sw OFF, Over Set Speed, S/C On Speed Hi, ECM Inhibit, Simul S/C-R/A, TCS, Under Set Speed, DLC Override, Memory DTC, Eng Run Time, Engine Speed, DTC Set, RPM Limit, First Gear, APP Override, Low Voltage, D Whl Spd Low, D Whl Spd Hi, Cruise S/S, Cruise Sw Data, ECT Overtemp, VSES, Trans. DTC, BPP Data, BPP DTC, Park Brake, ACC Inhibit, ACC Brake DTC, ACC Option, ACC Brake Inop, PTO Active. |
Cruise Cancel Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Control Active | -- | No | This parameter displays the status of the cruise control system as determined by the control module. The scan tool will display Yes when the cruise control system is in control of vehicle speed. The scan tool will display No when the cruise control system is not operating. |
Cruise On/Off Switch | -- | Off | The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | On | ||
Cruise Resume/Accel. Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cruise Set/Coast Switch | -- | Inactive | The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM). |
Switch pressed | Active | ||
Cycles of Misfire Data | -- | 0-100 Counts incrementing | This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the control module. |
Cyl. 1-6 Inj. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1-6 Inj. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1-6 Inj. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 1 and 4 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 1 and 4 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 1 and 4 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 2 and 5 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 2 and 5 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 2 and 5 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Cyl. 3 and 6 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Cyl. 3 and 6 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Cyl. 3 and 6 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Decel. Fuel Cutoff | -- | Inactive | This parameter displays the status of the operating mode used to turn off the fuel injectors during certain deceleration conditions. When the scan tool displays Active, the control module has turned off the fuel injectors. When the scan tool displays Inactive, the fuel system is operating normally. |
Desired CMP | -- | 0° | This parameter displays the desired camshaft position, in degrees, as calculated by the control module. |
Desired Idle Speed | -- | 768 RPM | This parameter displays the engine idle speed in RPM commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine RPM at idle. This parameter is not valid unless the engine is running. |
Distance Since DTC Cleared | -- | Varies | This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven. |
EC Ign. Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EC Ign. Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EC Ign. Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EC Ignition Relay Feedback Signal | -- | 13.0-14.2 Volts | This parameter displays the voltage signal sent to the control module from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF. |
EC Ignition Relay Command | -- | On | This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module. |
ECM Authentication Status | -- | Valid | This parameter indicates the result of the comparison between the last received immobilizer system response and the expected response calculated by the ECM. |
ECM Challenge Status | -- | Invalid | This parameter shows the immobilizer system status of the ECM challenge. This indicates whether the currently calculated ECM challenge is valid. |
ECM Response Source | -- | Normal | The parameter indicates the source used to calculate the ECM response. The sources include Normal Start, Remote Vehicle Start, PTO Remote Start. |
ECT Sensor | -- | 96-103°C/204-217°F | This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature sensor. When the coolant temperature is low, the scan tool will display a low temperature. When the coolant temperature is high, the scan tool will display a high temperature. |
Engine Load | -- | Varies | This parameter displays the engine load in percent based on inputs to the control module from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load. |
Engine Oil Pressure Sensor | -- | 137-193 kPa/20-28 psi | This parameter displays the engine oil pressure. |
Engine Oil Pressure Sensor | -- | 1.39 Volts Varies | This parameter displays the engine oil pressure sensor output in volts. |
Engine Oil Level Switch | -- | OK | This parameter indicates if the engine oil level is OK or Low. |
Engine Oil Life Remaining | -- | Varies | This parameter indicates the percentage of time left before an oil change is necessary according to the oil life monitor. |
Engine Oil Temperature Calculated | -- | 109°C/228° F Varies | This parameter displays the engine oil temperature. |
Engine Off Time | -- | Varies | This parameter displays the time elapsed since the engine was shut OFF. |
Engine Run Time | -- | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running. |
Engine Speed | -- | 750-800 RPM | This parameter displays the speed of the crankshaft as determined by the control module using an input from the crankshaft position (CKP) sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds. |
EPM Inhibit Reason | -- | Varies | This parameter displays the reason for the regulated voltage control (RVC) override command. RVC lowers system operating voltage to reduce the system electrical load and improve fuel economy performance. The RVC command will be overridden if the voltage commanded is below the minimum system voltage required to ensure that the fuel demand, powertrain OBD diagnostics, airflow measurement, cylinder deactivation, or transmission control module functions will execute properly. Reasons include the following: None, Device Control, Fuel Demand, OBD Diagnostics, Airflow Measurement, Cylinder Deactivation, Transmission Control Module Request. |
EVAP Fault History | -- | No Fault | This parameter displays the result of the evaporative emission (EVAP) system diagnostic. Scan tool displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK, WEAK VACUUM, or NO TEST RESULT. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM. |
EVAP Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
EVAP Purge Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Purge Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Purge Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Purge Solenoid Command | -- | 10-15% Varies | This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the control module expressed as a percent. The scan tool will display a high percentage when the control module is commanding the EVAP purge solenoid to be open a large amount. The scan tool will display a low percentage when the control module is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the control module is commanding the EVAP purge solenoid closed. |
EVAP Vent Sol Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
EVAP Vent Sol Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
EVAP Vent Sol Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
EVAP Vent Solenoid Command | -- | Venting | This parameter displays the state of the EVAP vent solenoid commanded by the control module expressed as a Venting or Not Venting. The scan tool will display a venting when the control module is commanding the EVAP vent solenoid to be open. The scan tool will display a not venting when the control module is commanding the EVAP vent solenoid to be closed. |
Ext. Travel BPP Signal | -- | Released | This parameter displays Applied, Released, or Invalid. A state of Applied indicates the brake pedal position sensor has traveled beyond a moderate, extended threshold as determined by the brake sensing module and received over serial data. |
Brake Pedal firmly applied | Applied | ||
FC Relay 1 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 1 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 1 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 1 Command | -- | On | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
FC Relay 2 and 3 Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
FC Relay 2 and 3 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
FC Relay 2 and 3 Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
FC Relay 2 and 3 Command | -- | Off | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
Fuel Alcohol Content | -- | Varies | This parameter displays the percentage of alcohol in the fuel. The value is calculated by the ECM using various sensor inputs. |
Fuel Composition Learn | -- | Inactive | This parameter displays Active or Inactive. Active will be displayed if the ECM is learning the alcohol content of the fuel. |
Fuel Level Sensor | -- | Varies | This parameter displays the approximate fuel level in the fuel tank as a voltage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Fuel Pump Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Fuel Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Fuel Pump Relay Command | -- | On | This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be on when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be off when the scan tool indicates the Fuel Pump Relay Command is Off. |
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as a percentage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full. |
Fuel Tank Pressure Sensor | -- | -19.8 to +12.52 mm Hg/-10.5 to +6.17 in H2O | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high. |
Fuel Tank Pressure Sensor | -- | 0.2-4.0 V | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low. |
Fuel Tank Rated Capacity | -- | 64.2 Liters/17 Gallons | This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle. |
Fuel Trim Cell | -- | 0 | This parameter displays the fuel trim cell number as calculated by the control module based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load. |
Fuel Trim Learn | -- | Enabled | This parameter indicates if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled. |
Fuel Trim System Test State | -- | Varies | This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test. |
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low. |
GEN F-Terminal Signal | -- | 45% Varies with electrical load | This parameter is an ECM input of the generator field duty cycle. This is an indication of generator load on the engine. |
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
GEN L-Terminal Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
GEN L-Terminal Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
GEN L-Terminal Command | -- | 65% Varies with electrical load | The scan tool displays 0-100 percent. The scan tool displays the percentage of the output voltage of the generator. |
GEN L-Terminal Signal Command | -- | On | This parameter indicates the generator commanded state by the ECM. |
HO2S Heater Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S Heater Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S/O2S Monitor Complete This Ignition | -- | Varies | This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S/O2S Monitor Enabled This Ignition | -- | Varies | This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No. |
HO2S 1 | -- | 50-950 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S 1 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. |
HO2S 1 Heater | -- | 0.76 Amps | This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S Heater Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. |
HO2S 1 Heater Command | -- | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. |
HO2S 1 Heater Command | -- | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. |
HO2S 1 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 1 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 1 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HO2S 2 | 50-850 mV and Varying | The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV , and 1,000 mV, while operating in Closed Loop. | |
HO2S 2 Heater | 0.76 Amps | This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S heater Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. | |
HO2S 2 Heater Command | Varies | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON. | |
HO2S 2 Heater Command | On | This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON. | |
HO2S 2 Htr Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
HO2S 2 Htr Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
HO2S 2 Htr Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
HOT Open Loop | -- | Inactive | This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally. |
IAT Sensor | -- | Varies | The scan tool displays °C/F. The ECM converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. Intake air temp is used by the ECM to adjust fuel delivery and spark timing according to incoming air density. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The ECM converts the resistance of the intake air temperature sensor to degrees. The ECM uses the IAT in order to adjust fuel delivery and spark timing according to incoming air density. |
Ignition 1 Signal | -- | 13-14.2 Volts | This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position. |
Ignition Accessory Signal | -- | On | This parameter displays the state of the ignition 0 input to the control module from the ignition switch. The scan tool will display On when the ignition switch is in the ignition accessory position. The scan tool will display Off when the ignition switch is in any other position. |
Inj. 1-6 Disabled Due to Misfire | -- | No | This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire. |
Injector PWM | -- | 1.55-1.85 ms | The scan tool displays mS Indicates the base PWM or ON time of the fuel injectors in milliseconds. When the engine load is increased, the injector pulse width will increase. Indicates the amount of time the PCM is commanding each injector ON during each engine cycle. A longer injector pulse width will cause more fuel to be delivered. Injector pulse width should increase with increased engine load. |
Intake Manifold Pressure | -- | Varies | This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or high load cruising. |
Knock Detected Cyl. 1-6 | -- | No | This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event. |
Knock Retard | -- | 0 Degrees | The scan tool displays °. Indicates the amount of spark the PCM is removing from ignition control (IC) spark advance in response to the signal from the knock sensors. The traction control system desired torque signal from the electronic brake and traction control module (EBTCM) may cause knock retard to display a value more than 0.0 degrees if traction control is active. |
Long Term FT | -- | -10 to +10% | The scan tool range is -99 to +99 percent . This parameter indicates the Long Term fuel trim (FT) correction for bank 1 as commanded by the PCM. A change made to the fuel delivery will be indicated by the Long and Short Term FT values. The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Loop Status | -- | Closed | Closed loop indicates that the PCM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the PCM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and MAF sensor inputs only. |
Low Engine Oil Level Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil level indicator as monitored by the ECM. |
Low EOP Indicator Command | -- | Off | The scan tool displays ON or OFF. This is the state of the low engine oil pressure indicator as monitored by the ECM. |
LT FT Test Avg. | -- | 0.68% | This parameter is the average long term fuel trim for this bank as calculated by the control module. The scan tool will display a value more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0, indicating time is being subtracted from the injector pulse width, reducing the amount of fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio. |
LT FT Test Avg. w/o Purge | -- | 1.02% | This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will display a high value for a large amount of long term fuel correction, and 0 percent for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event |
MAF Performance Test | -- | OK | This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAF Sensor | -- | 3-6 g/s (varies with altitude) | The scan tool displays g/s The scan tool displays a range of 0.0-655 g/s. The mass air flow (MAF) is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine. |
MAF Sensor | -- | 1,200-1,300 Hz (varies with altitude) | The scan tool displays a range of 0-31,999 Hz. The MAF sensor is a hot wire type air flow sensor. The ECM converts current draw needed by the MAF to keep the hot wires at a constant into a frequency signal. The scan tool displays this frequency in a hertz signal. |
MAP Performance Test 1 | -- | OK | This parameter displays the status of the MAP performance test 1 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Performance Test 2 | -- | OK | This parameter displays the status of the MAP performance test 2 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
MAP Sensor | -- | 20-48 kPa (varies with altitude) | The scan tool displays kPa. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MAP Sensor | -- | 0.4-2.0 V (varies with altitude) | The scan tool displays Volts. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
MIL Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
MIL Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
MIL Command | -- | Off | This parameter displays the commanded state of the MIL control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check. |
MIL Requested by DTC | -- | No | This parameter shows if the illumination of the MIL has been requested by a failed diagnostic trouble code (DTC). |
Misfire Current Cyl. 1-6 | -- | 0 Counts | The scan tool displays 0-255 counts. The display shows the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers. |
Misfire History Cyl. 1-6 | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
PNP Switch | -- | Park/Neutral | The scan tool displays the position of the transmission selection as Park/Neutral or In Gear. |
Power Enrichment | -- | Inactive | Scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in Power Enrichment mode. The PCM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occurring during acceleration. |
Output Shaft Speed Sensor | -- | 0 RPM | The parameter shows the transmission output speed, the speed at the output of the gear box, determined from the speed measured by the transmission output speed (TOS) sensor with the application of the factors to account for the location of the sensor, e.g. after the gear box, after the final chain, after the transfer case, after the final drive, etc. In applications that include both a transmission output speed sensor and a transfer case speed sensor, this parameter will apply specifically to the output of the transmission. |
Reduced Engine Power | -- | Inactive | The scan tool displays Active or Inactive. The scan tool displays Active when the PCM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The PCM limits the engine power. |
RVS Disable 1-8 History | -- | Varies | These parameters show the last 8 reasons the ECM disabled remote vehicle start (RVS). Reason 1 is the most current reason. |
RVS Request Signal | -- | Off | This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode. |
Short Term FT | -- | -10 to +10% | The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT . The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition. |
Spark | -- | 18-24 Degrees | The scan tool displays a range of -64 to +64°. The scan tool displays the amount of degrees the PCM commands. The PCM computes the desired spark advance using the following: (1) ECT, (2) engine speed (RPM), (3) load, (4) vehicle speed. The PCM adjusts the timing. A negative (-) value indicates degrees before top dead center (BTDC) or spark advance; a positive value indicates degrees after top dead center (ATDC) or spark retard. |
ST FT Test Avg. | -- | 0.98-1.00% | This parameter is calculated by the control module based on an intrusive test by the control module. The Short Term FT Test Average used for the short term correction of the fuel delivery. The scan tool will display a high value for a large amount of short term fuel correction, and 0 percent for no short term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. |
Starter Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit. |
Starter Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit. |
Starter Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit. |
Starter Relay Command | -- | Off | The scan tool displays ON or OFF. This displays the commanded state of the starter relay by the ECM. |
Ignition switch in the crank position | On | ||
Start-up ECT | -- | Varies | Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The scan tool displays the engine ECT at the time the engine was started. The PCM uses start-up ECT for certain DTCs. Indicates the engine coolant temperature at the time that the vehicle was started. Used to determine if the last startup was a cold start. |
Start-up IAT | -- | Varies | Indicates the IAT at the time that the vehicle was started. Used to determine if the last startup was a cold start. The scan tool range is -39 to +140°C (-38 to +284°F). This parameter indicates the ambient air temperature at start-up. |
TAC Forced Engine Shutdown | -- | No | This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault. |
TAC Motor | -- | Enabled | This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled. |
TAC Motor Command | -- | 15-25% | This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position. |
TB Idle Airflow Compensation | -- | 32% Varies | This parameter indicates the amount of airflow compensation in response to engine intake air flow restrictions. |
TFT Sensor (If equipped) | -- | Varies | This parameter indicates the transmission fluid temperature measured by a sensor. In automatic transmission applications, this is based upon the transmission fluid temperature sensor input to the TCM. In manual transmission applications with a transmission fluid temperature sensor, this is based upon the transmission fluid temperature sensor input to the ECM. |
Torque Delivered Signal | -- | 2-6 ft-lbs | Represents the PWM signal which indicates the available torque the engine is delivering to the drive wheels. The EBTCM monitors the traction control torque signal to ensure that the ECM is responding properly to the traction control desired torque signal. |
Torque Management Spark | -- | 0% | This parameter indicates how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving. |
Total Knock Retard | -- | 0 Degrees | This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions. |
Total Misfire | -- | 0 Counts | The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events. |
TP Desired Angle | -- | 6% | The scan tool displays %. The scan tool displays 0-100 percent. The PCM indicates the desired throttle angle commanded by the vehicle operator. The scan tool indicates the desired throttle angle commanded by the vehicle operator. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 11% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Indicated Angle | -- | 6% | This parameter displays the angle of the TP in percent. This information is calculated by the control module using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Performance Test | -- | OK | This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test. |
TP Sensor 1 | -- | 4.06 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 1 of the TP sensor assembly. The scan tool will display a high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 3.27 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 0.80 Volts | ||
TP Sensor 1 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 1 in percent. This information is calculated by the control module using the signal from the throttle position sensor 1. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 29% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 1 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle. |
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2 . The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2. |
TP Sensor 2 | -- | 0.90 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 2 of the TP sensor assembly. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 1.69 Volts | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 4.16 Volts | ||
TP Sensor 2 Indicated Position | -- | 6% | This parameter displays the angle of the TP sensor 2 in percent. This information is calculated by the control module using the signal from the throttle position sensor 2. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open. |
With Ignition On, Engine Off, Accelerator pedal not actuated | 28% | ||
With Ignition On, Engine Off, Accelerator pedal fully actuated | 100% | ||
TP Sensor 2 Learned Minimum | -- | 0.69 Volts | This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle. |
Vehicle Speed Sensor | -- | 0 km/h/mph | The scan tool range is 0-200 km/h (0-125 mph). This parameter displays the vehicle speed. The PCM receives reference pulses from the vehicle speed sensor (VSS) and converts them into km/h and mph for display. |
VTD Auto Learn Counter | -- | 0 Counts | This parameter indicates the number of auto-learn cycles that have been successfully completed within the immobilizer system. |
VTD Auto Learn Timer | -- | 0 Seconds | This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system. |
VTD Password Learn Enabled | -- | No | This parameter indicates if learning of the immobilizer secret information is enabled. |
VTD Security Code Accepted | -- | No | This parameter indicates that the received immobilizer system security code is correct. |
VTD Security Code Lockout | -- | Inactive | This parameter displays Active or Inactive. Security Code Lockout Active indicates that the security code has not passed and lockout is active. |
VTD Security Code Programmed | -- | No | This parameter indicates if the immobilizer system security code has been programmed. |
VTD Security Info. Programmed | -- | Yes | This parameter indicates if the immobilizer secret information, e.g. powertrain pre-release password, powertrain secret key, has been programmed. |
VTD System Status | -- | Dis. Neg. Resp. | This parameter indicates the current state of the immobilizer algorithm. The states include the following: Standby, Disabled at Startup, Disabled Due to No Response, Disabled Due to Negative Response, Disabled Due to Incorrect Response, Post Release, Pre-Release, Released. |
Warm-ups Since DTC Cleared | -- | Varies | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles since a DTC was cleared from memory. The scan tool displays counts. |
Warm-ups w/o Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without an emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing the information with a scan tool or a loss of power to the PCM also resets the counter to 0. The scan tool displays counts. This display indicates the number of warm-up cycles without a emission failure. |
Warm-ups w/o Non-Emission Faults | -- | 0 | The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without a non-emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also resets the counter to 0. |
Wide Open Throttle | -- | No | This parameter indicates the throttle status commanded by the control module. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100 percent. |
Output Control | Description | ||||||
|---|---|---|---|---|---|---|---|
A/C Relay | The commanded states are ON or OFF. The command turns the A/C relay ON or OFF, which engages or disengages the A/C compressor clutch. | ||||||
AIR Pump Relay | This output control is used to turn the AIR pump on or off. | ||||||
AIR Service Bay Test | This output control is used to trigger the secondary air injection (SAI) diagnostic service bay test, which causes the on board SAI diagnostic to execute until it is completed or aborted. The SAI diagnostic consists of three phases, SAI on test, SAI valve shut test, and SAI pump off test. | ||||||
AIR Solenoid | This output control is used to turn the AIR valve on or off. | ||||||
AIR System | This output control is used to turn the AIR pump and the AIR valve on or off. | ||||||
CMP Actuator | Activates the CMP actuator. Commands the desired CMP from 0-25 degrees in 5 degree increments. The commanded states include Increase and Decrease. The normal state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
CMP Actuator Solenoid | Activates the CMP actuator. The commanded states include ON and OFF. The normal state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
Crankshaft Pos. Variation Learn | This output control is used to activate the crankshaft position variation learn (CASE) algorithm which calculates the reference pulse correction factors for the misfire diagnostic. | ||||||
Cylinder Power Balance | Enables/disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met:
When DISABLE is selected, the control module turns the injector OFF for 30 seconds. | ||||||
Engine Controls Ignition Relay | Activates the engine controls ignition relay. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the tool. | ||||||
Engine Speed Control | Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 500-1,950 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool. | ||||||
EVAP Purge/Seal | Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Purge Solenoid | Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
EVAP Service Bay Test | Activates the on-board EVAP diagnostic test. | ||||||
EVAP Vent Solenoid | Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O). | ||||||
Fan Relay 1 | The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF. | ||||||
Fan Relay 2 & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed. | ||||||
Fan Relays 1, 2, & 3 | The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed. | ||||||
Fuel Composition Reset | Important: Do not use this output control unless the actual alcohol content of the fuel in the tank is 10 percent or less. This will reset the learned alcohol composition to 0 percent in the engine control module (ECM). | ||||||
Fuel Injector Balance | Enables the fuel injector in order to verify proper fuel injector flow. The ECM will pulse the selected injector when the following conditions are met:
The selected fuel injector can only be flowed/pulsed once per ignition cycle. | ||||||
Fuel Pump Relay | Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running. | ||||||
Fuel Trim Enable | Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Reset | Activates the reset of fuel trim data in all fuel trim cells. | ||||||
GEN L-Terminal | The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. | ||||||
HO2S Heater Learn | This output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine off time, typically 12 or more hours. | ||||||
HO2S Heater Sensor 1 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
HO2S Heater Sensor 2 | Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature. | ||||||
Idle Learn Reset | This output control is used to reset the learned airflow adaptive values to their initial values. | ||||||
Idle Spark | Disables and enables idle spark advance with the engine running. | ||||||
Loop Status | Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Malfunction Indicator Lamp | Activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool. | ||||||
Misfire Graphic | Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph. | ||||||
Oil Life Reset | The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life. | ||||||
RVS Disable History Reset | This output control is used to trigger the reset of the last 8 reasons the ECM has disabled remote vehicle start (RVS). | ||||||
Spark Retard | Controls the amount of spark retard. The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The normal commanded state is none. | ||||||
Starter Relay | This output control is used to override the state of the starter relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON. | ||||||
Throttle Position | Operates TAC motor in from 0-100 percent in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF. |
