Engine Control Module Scan Tool Information 2.4L
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No DTCs |
| • | On-board diagnostics are functioning properly. |
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 normal running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool problem 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 | |||
5-Volt Reference 1 | -- | 4.5 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 2 | -- | 4.5 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. |
A/C Relay Command | -- | Off | This parameter displays the commanded state of the A/C clutch relay control circuit. The scan tool will display ON or OFF. ON indicates the A/C clutch relay control circuit is being grounded by the control module, allowing voltage to the A/C compressor clutch. OFF indicates the A/C clutch relay is not being commanded on by the control module. |
Air Flow Calculated | -- | 3.5 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 Temp | -- | 7°F (14°C) | Outside temperature at any given altitude expressed in degrees. |
APM Control Mode | -- | High to Low | This PID contains the commanded control mode of the APM to the 12V, Low, battery and the hybrid, high, battery as controlled in the Starter Generator Control Module |
APM Control Status | -- | Charging | This PID contains the control status of the APM as controlled in the Starter Generator Control Module. |
APM Voltage | -- | 14 Volts | This PID contains the voltage out of the APM to the 12V battery as measured in the Starter Generator Control Module. |
APP Indicated Angle | -- | 0% | This parameter displays the angle of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position (APP) sensors. The accelerator pedal position 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. |
APP Sensor 1 | -- | 1.02 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. |
APP Sensor 1 | -- | 17% | This parameter displays the angle of the accelerator pedal position (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 pressed to a high percentage when the accelerator pedal is fully pressed. |
APP Sensor 1 Indicated Angle | -- | 0% | This parameter displays the angle of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position (APP) sensors. The accelerator pedal position 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. |
APP Sensor 2 | -- | 4.04 Volts | 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. |
APP Sensor 2 | -- | 89% | This parameter displays the angle of the accelerator pedal position (APP) sensor 2 as calculated by the control module using the signal form the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not pressed to a high percentage when the accelerator pedal is fully pressed. |
APP Sensor 2 Indicated Angle | -- | 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. |
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 Sensors | -- | 0% | Electronic throttle control indicated pedal position. This is stated in percent. |
BARO | -- | 65-104 kPa/ Varies w/Altitude | This parameter displays the barometric pressure as calculated by the control module using the signal from the 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 | This parameter displays the state of the brake pedal position switch as determined by the brake pedal switch. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed. |
BPP Signal | -- | Invalid | This parameter displays the state of the brake pedal position switch as determined by the brake pedal switch. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed. |
Brake Booster Pressure | -- | 60 kPa | This parameter displays the negative pressure, vacuum, internal to the brake booster assembly in kPa or inches of mercury, Hg. |
Calculated Starter Generator Torque | -- | 8-10 N·m | This PID contains the calculated torque delivered by the Starter Generator. |
Catalytic Converter Protection Active | -- | No | This parameter displays the state of the Catalytic Converter Protection mode. |
CKP Active Counter | -- | Varies | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position sensor (CKP). |
CKP Resync Counter | -- | 0 | This parameter displays the number of times the control module has to resynchronize the CKP sensor. |
CKP Sensor | -- | Varies | This parameter displays the RPM that the control module is using for crankshaft position sensing. |
CMP Active Counter | -- | 9-250 | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
CMP Sensor | -- | Varies | This parameter displays the speed of the engine as calculated by the signal from the camshaft position (CMP) sensor, shown in RPM. |
Cold Start-Up | -- | 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. |
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. |
Cycles of Misfire Data | -- | Varies | This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the control module. |
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 Exh. CMP | -- | Varies | This parameter displays the desired exhaust camshaft position, as determined by the control module. The scan tool will display a higher value for more advanced exhaust valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced exhaust valve timing, such as at idle. |
Desired APM Voltage | -- | 14 Volts | This PID contains the voltage commanded by the APM to the 12 volt battery as measured in the Starter Generator Control Module. |
Desired Hybrid Battery Soc | -- | 65-75% | This PID contains the target state of charge of the 36-volt battery. |
Desired Idle Speed | -- | PCM Controlled | 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. |
Desired Int. CMP | -- | 0° | This parameter displays the desired exhaust camshaft position, as determined by the control module. The scan tool will display a higher value for more advanced intake valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced intake valve timing, such as at idle. |
Desired Starter Generator Torque | -- | 8 N·m | This PID contains the torque requested by the ECM for Starter Generator control. |
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 Ignition Relay Circuit Status | -- | Incomplete | This parameter displays the status of the output driver for the EC ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open, short to ground or a short to voltage on the circuit. |
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 the ignition system. OFF indicates the EC ignition relay is not being commanded on by the control module. |
EC Ignition Relay Feedback Signal | -- | 14 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. |
ECT Sensor | -- | 88-105°C (190-221°F) Depends on ambient temperature | This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature (ECT) 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 Auto Start Reason | -- | None | This PID contains the reason HEON was entered. |
Engine Load | -- | 30-24% @ Idle 42% @ 2500 RPM | 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 | -- | 4 kPa | This parameter displays the engine oil pressure. |
Engine Oil Pressure Switch | -- | OK | This parameter displays the state of the engine oil pressure as determined by the control module. The control module monitors the engine oil pressure switch to determine if the engine oil pressure is sufficient. The scan tool will display low when the engine oil pressure is below a predetermined value. The scan tool displays OK or Low. This parameter displays whether or not sufficient engine oil pressure is present. |
Engine Oil Temp Calculated | -- | Varies | This parameter displays the temperature of the engine oil as calculated by the control module using a signal from the engine oil temperature sensor. The engine oil temperature sensor has a range of values indicating a low value when the oil temperature is low to a high value when the oil temperature is high. |
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 | -- | 500-700 RPM | This parameter displays the speed of the crankshaft as determined by the control module using an input from the CKP sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds. |
Engine Time Off | -- | Varies | This parameter displays the time elapsed since the engine was shut off. |
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, or WEAK VACUUM. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM. |
EVAP Purge Solenoid Command | -- | 10-30% | 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 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. |
Exh. CMP Active Counter | -- | 0-250 | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Exh. CMP Angle | -- | 0° | This parameter displays the degrees of advanced exhaust camshaft angle related to crankshaft position as determined by the control module based on input from the exhaust CMP sensors. The scan tool will display a higher value for a more advanced exhaust camshaft position. The scan tool will display a lower value when the exhaust camshaft is not being advanced, such as at idle. |
Exh. CMP Command | -- | 0% | This parameter displays the exhaust camshaft position in percent of range as commanded by the control module. |
Exh. CMP Variance | -- | 0° | This parameter displays in degrees, the difference between the desired exhaust camshaft position and he actual exhaust camshaft position. |
Ext, Travel BPP Signal | -- | Invalid | This parameter will display the state of the brake pedal, applied or released. |
Fuel Level Sensor | -- | 1-2 Volts | 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 Circuit Status | -- | Incomplete | 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. The scan tool will display Fault if there is an open, short to ground or a short to voltage on the circuit. |
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 | -- | Varies | 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 | -- | Varies | 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 Rated Cap. | -- | Varies | 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 | -- | 16, 17, 21 | 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 | -- | Disabled | 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 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 Volatility | -- | Low | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low. |
HO2S 1 | -- | 10-1,000 mV and Varying | The scan tool displays a range of 0-1,106 mV. |
HO2S 1 Heater Command | -- | ON | This parameter displays the commanded state of the heater control circuit for oxygen sensor 1. The oxygen sensor 1 heater should be on when the scan tool indicates the HO2S 1 Heater Command is On. The oxygen sensor 1 heater should be off when the scan tool indicates the HO2S 1 Heater Command is Off. |
HO2S 2 | -- | 10-1,000 mV and Varying | The scan tool displays a range of 0-1,106 mV. |
HO2S 2 Heater Command | -- | Varies | This parameter displays the commanded state of the heater control circuit for oxygen sensor 2. The oxygen sensor 1 heater should be on when the scan tool indicates the HO2S 2 Heater Command is ON. The oxygen sensor 2 heater should be OFF when the scan tool indicates the HO2S 2 Heater Command is OFF. |
HO2S 2 Heater Command | -- | ON | This parameter displays the commanded state of the heater control circuit for oxygen sensor 2. The oxygen sensor 1 heater should be on when the scan tool indicates the HO2S 2 Heater Command is ON. The oxygen sensor 2 heater should be OFF when the scan tool indicates the HO2S 2 Heater Command is OFF. |
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. |
Hybrid Battery Aug Cell Temp | -- | 70 Degrees | This PID contains the average temperature of the Hybrid battery. The BAS has 6 temperature sensors in the battery, two sensors per cassette. The average temperature uses all 6 sensors. |
Hybrid Battery Current | -- | 0.1-1.0 Amps | This PID contains the hybrid battery current in amps. The scaling is set for usage with higher current system than the BAS. |
Hybrid Battery Power Available | -- | 10,000-11,000 Watts | This PID contains the Hybrid Battery Discharge Power Available in watts. |
Hybrid Battery Soc | -- | 70-75% | This PID contains the state of charge of the 36-volt battery. |
Hybrid Battery Voltage | -- | 39-40 Volts | This PID contains the hybrid battery output voltage. The scaling is set for usage with higher voltage than the BAS. |
IAT Sensor | -- | Depends on ambient temperature | The scan tool displays °C. The engine control module (ECM) converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the 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 -40 to +150°C (-40 to +302°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 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. |
Ignition 1 Signal | -- | 11.5-14.5 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. |
Injector 1 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 2 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 3 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 4 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. |
Int. CMP Active Counter | -- | 0-250 | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Int. CMP Angle | -- | 0% | This parameter displays the actual intake camshaft position in degrees. |
Int. CMP Command | -- | 0% | This parameter displays the intake camshaft position in percent of range as commanded by the control module. |
Int. CMP Variance | -- | 0% | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position. |
Intake Manifold Pressure | -- | 55-65 kPa | 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. |
Injector PWM | -- | 2-6 ms | The scan tool displays ms. Indicates the base pulse width modulation (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. |
Knock Detected Cyl. 1 | -- | 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 Detected Cyl. 2 | -- | 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 Detected Cyl. 3 | -- | 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 Detected Cyl. 4 | -- | 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% | 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 | -- | Near 0% | The scan tool displays percentage. The ECM derives the long term fuel trim from the short term fuel trim value. The long term fuel trim represents a long term correction of fuel delivery. A value of 0 percent indicates that fuel delivery requires no compensation in order to maintain the ECM commanded air/fuel ratio. A negative value significantly below 0 percent indicates that the fuel system is rich and the ECM is reducing the fuel delivery. A positive value significantly more than 0 percent indicates that a lean condition exists and the ECM compensates by adding fuel. Fuel trim values at maximum authority indicates an excessively rich or lean system. |
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 mass air flow (MAF) sensor inputs only. |
MAF Sensor | -- | 3 g/s | The scan tool displays g/s The scan tool displays a range of 0.0-655 g/s. The MAF is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine. |
MAF Sensor | -- | 3-4 g/s | 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 Sensor | -- | 2-5 volts | 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 0-5 volts. The MAP sensor measures the absolute pressure in the intake manifold. |
MAP Sensor | -- | 20-48 kPa | 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 10-104 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
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 indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs. |
Misfire Current Cyl #1 | -- | 0 | 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 Current Cyl #2 | -- | 0 | 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 Current Cyl #3 | -- | 0 | 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 Current Cyl #4 | -- | 0 | 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 | -- | 0 | 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. |
Misfire History Cyl #2 | -- | 0 | 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. |
Misfire History Cyl #3 | -- | 0 | 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. |
Misfire History Cyl #4 | -- | 0 | 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 | -- | P | This parameter displays whether the transmission range selector is in Park or Neutral. |
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. |
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. |
Regen Braking Dis Reason | -- | Varies | This PID contains the reason regenerative braking is disabled. |
Short Term FT | -- | Near 0% | The scan tool displays percentage. The short term fuel trim represents a short term correction to fuel delivery by the ECM in response to the amount of time the fuel control oxygen sensor voltage spends above or below the 450 mV threshold. If the oxygen sensor voltage mainly remains less than 450 mV, indicating a lean air/fuel mixture, short term fuel trim increases into the positive range above 0 percent. The ECM adds fuel. If the oxygen sensor voltage stays mainly above the threshold, the short term fuel trim decreases below 0 percent into the negative range. The ECM reduces the fuel delivery in order to compensate for the indicated rich condition. Under certain conditions such as an extended idle and a high ambient temperature, the canister purge may cause the short term fuel trim to read in the negative range during normal operation. The fuel trim values at maximum authority may indicate an excessively rich or lean system. |
Spark | -- | 11-20° | 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. |
Start Up ECT | -- | Varies | Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -40 to +150°C (-40 to +302°F). The scan tool displays the engine ECT at the time the engine was started. The ECM uses start-up ECT for certain DTCs. |
Start Up IAT | -- | Varies | Indicates the IAT at the time that the vehicle was started. The scan tool range is -40 to +150°C (-40 to +302°F). This parameter indicates the ambient air temperature at start-up. |
Starter Generator Belt Slip | -- | Near 0% | This PID contains the belt slip percent. |
Starter Generator Speed | -- | 1,500-1,700 RPM | This PID contains the actual Starter Generator Speed determined by the SGCM and transmitted to the ECM. |
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 | -- | 179% | 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. |
TCC/Cruise Brake Pedal | -- | Released | This parameter displays the position of the torque converter clutch (TCC) brake pedal switch input to the control module. The scan tool displays Applied, Released, or Invalid. |
TCS Torque Delivered Signal | -- | 0% | Represents the pulse width modulation (PWM) signal which indicates the percent of 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. |
TCS Torque Request Signal | -- | 100% | Represents the PWM signal from the EBTCM. 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. |
TFP Switch | -- | P/N | This parameter displays the state of the Transmission Internal Mode Switch based on the signal from the IMS inside the transmission. The scan tool will display Drive 1, Drive 2, Drive 3, Drive 4, Park, Reverse, or Neutral. Drive 1 indicates the Transmission Range switches C and P are closed, connecting these circuits to ground. Drive 2 indicates the Transmission Range switches A and C are closed, connecting these circuits to ground. Drive 3 indicates that all of the Transmission Range switches are closed, connecting all four circuits to ground. Drive 4 indicates the Transmission Range switches B and C are closed, connecting these circuits to ground. Park indicates the Transmission Range A switch is closed, connecting the circuit to ground. Reverse indicates the Transmission Range switches A, B, and P are closed, connecting these circuits to ground. Neutral indicates the Transmission Range switches B and P are closed, connecting these circuits to ground. |
TFP Switch A | -- | High | This parameter displays HI or LOW. The display is an input from the automatic transmission fluid pressure manual valve position switch "A". HIGH indicates that there is line pressure present (switch closed). LOW indicates that there is no line pressure present (switch open). This switch is present on Hybrid applications only. |
Total Knock Retard | -- | 0% | 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 Count | -- | 0 | 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 | -- | 4% | The scan tool displays percent. 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. |
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 plate is closed. The scan tool will display a high percentage when the throttle plate is fully open. |
TP Sensor 1 | -- | 4% | This parameter displays the angle of the throttle position (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. |
TP Sensor 1 | -- | 4.24 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 low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open. |
TP Sensor 1 Indicated Position | -- | 4% | 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. |
TP Sensor 1 Learned Minimum | -- | 0.55 Volts | 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. |
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 | -- | 4% | This parameter displays the angle of the throttle position (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. |
TP Sensor 2 | -- | 0.75 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 high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open. |
TP Sensor 2 Indicated Position | -- | 4% | 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. |
TP Sensor 2 Learned Minimum | -- | 0.57 Volts | This parameter displays the learned minimum value of TP sensor 2 as recorded by the control module on start-up for the ignition cycle. |
Vehicle Speed Sensor | -- | 0 | This parameter indicates the vehicle speed as calculated by the control module based on a signal from the vehicle speed sensor (VSS). The scan tool will display a higher value at higher vehicle speeds, and a lower value at lower vehicle speeds. |
Warm-ups Since DTC Cleared | -- | Varies | This parameter indicates the number of warm up cycles that have occurred Since DTCs were cleared. The scan tool will display a higher counts as more warm up cycles have occurred since the DTCs were cleared. |
Warm-ups Without Emission Faults | -- | Varies | 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 Without Non-Emission Faults | -- | Varies | 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 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 | ||||||
|---|---|---|---|---|---|---|---|
Engine Controls Ignition Relay | Enables or disables the Engine Controls Ignition Relay. The scan tool will command the engine controller to turn the relay ON or OFF. The normal commanded state is ON. | ||||||
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 400-2,200 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 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 19 mm Hg (10 in H2O). | ||||||
EVAP Vent Solenoid | Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds 19 mm Hg (10 in H2O). | ||||||
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 19 mm Hg (10 in H2O). | ||||||
Exhaust CMP Actuator | This function controls the exhaust camshaft position (CMP) actuator. The normal commanded state is 0 degrees. The system will INCREASE or DECREASE the exhaust camshaft timing by changing the duty cycle of the actuator in 5-degree increments up to 50 degrees. This also affects Desired Exh. CMP Angle. | ||||||
Fuel Injector Balance | Enables the fuel injector in order to verify proper fuel injector flow. The PCM 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 | Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running. | ||||||
Fuel Trim Enable | Disables the PCMs 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. | ||||||
Idle Spark | Enables or disables idle spark command. When commanded ON, the idle spark will be controlled to 13 degrees before top dead center. The normal commanded state is OFF. | ||||||
Intake CMP Actuator | This function controls the intake CMP actuator. The normal commanded state is 0 degrees. The system will INCREASE or DECREASE the intake camshaft timing by changing the duty cycle of the actuator in 5-degree increments up to 40 degrees. This also affects Desired Int. CMP Angle. | ||||||
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. | ||||||
MIL | Activates the malfunction indicator lamp (MIL). The MIL will remain illuminated until cancelled by the scan tool. | ||||||
HO2S Heater Driver | Activates the heated oxygen sensor (HO2S) heater. 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. | ||||||
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 degrees of spark retard will remain in the commanded state until cancelled by the scan tool. The normal commanded states is NONE. | ||||||
Throttle Position | Operates TAC motor in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF. | ||||||
APP Learn | This procedure allows the TAC system to re-learn the minimum accelerator pedal position in the even of the bracket and rod assembly replacement. |
Engine Control Module Scan Tool Information 3.6L
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Control Module (ECM) Scan Tool Data List contains all ECM-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 Engine Scan Tool Data List represents values that would be seen on a normally running engine under the conditions listed below.
Note: 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.
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 | -- | Varies | The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor. |
A/C High Side Pressure | -- | 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 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 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 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 | ||
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. |
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 |
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 Sensor 1 | Accelerator pedal not actuated | 0.96 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 | 4.31 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 angle 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 volts | 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 | 2.16 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% | ||
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. |
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 Pressed | Applied | ||
Calc. TWC Temp. Bank 1 | -- | Varies | Calculated catalytic converter temperature |
Calc. TWC Temp. Bank 2 | -- | Varies | Calculated catalytic converter temperature |
Catalyst Monitor Complete This Ignition | -- | No | This parameter displays the monitor completion status during the current driving/monitoring cycle. |
Catalyst Monitor Enabled This Ignition | -- | Yes | This parameter displays the monitor enable status during the current driving/monitoring cycle. |
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 Intake camshaft position (CMP) sensor bank 1. |
CMP Sensor | -- | Same as Engine Speed | This parameter displays the speed of the engine as calculated by the signal from the Intake CMP sensor bank 1. |
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. |
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. |
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 inactive 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 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 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). |
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 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 1-6 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 1-6 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. |
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 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 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. |
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 Exh. CMP Bank 1 | -- | 0 Degrees | This parameter displays the desired exhaust camshaft angle as commanded by the control module. |
Desired Exh. CMP Bank 2 | -- | 0 Degrees | This parameter displays the desired exhaust camshaft angle as commanded by the control module. |
Desired Int. CMP Bank 1 | -- | 0 Degrees | This parameter displays the desired intake camshaft angle as commanded by the control module. |
Desired Int. CMP Bank 2 | -- | 0 Degrees | This parameter displays the desired intake camshaft angle as commanded by the control module. |
Desired Idle Speed | -- | 632 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. |
Drag Control Status | -- | Inactive | EDC Active Control Mode is active when the Requested Torque Signal is within the EDC region, 10% to 35% duty cycle, while the Traction Control System Data Control Signal input is Active. |
Drop Throttle Status | -- | Inactive | Drop Throttle Control Mode is active when the Requested Torque Signal indicates > 90% duty cycle while the Traction Control System Data Control Signal input is active. |
EC Ignition Relay Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the EC 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 Ignition Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the EC 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 Ignition Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the EC 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 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. |
EC Ignition Relay Feedback Signal | -- | 13-15 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. |
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 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 Pressure Switch | -- | OK | This parameter displays the state of the engine oil pressure as determined by the control module. The control module monitors the engine oil pressure switch to determine if the engine oil pressure is sufficient. The scan tool will display low when the engine oil pressure is below a predetermined value. The scan tool displays OK or Low. This parameter displays whether or not sufficient engine oil pressure is present. |
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 Off Time | -- | Varies | This parameter displays the time elapsed since the engine was shut OFF. |
Engine Oil Pressure Sensor | -- | 137-193 kPa / 20-28 psi | This parameter indicates engine oil pressure analog input. |
Engine Oil Temperature Calculated | -- | 98°C / 208°F Varies | This parameter displays a calculated engine oil temperature based on engine coolant temperature and other parameters. |
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 | -- | 600-650 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 | -- | No | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle. |
EVAP Monitor Enabled This Ignition | -- | No | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle. |
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 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 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 | -- | 10-20% | 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 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 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 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. |
Exh. CMP Angle Bank 1 | -- | 0 Degrees | This parameter displays the actual exhaust camshaft position in degrees. |
Exh. CMP Angle Bank 2 | -- | 0 Degrees | This parameter displays the actual exhaust camshaft position in degrees. |
Exh. CMP Bank 1 Active Counter | -- | Varies | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Exh. CMP Bank 1 Command | -- | 0% | This parameter displays the exhaust camshaft position in percent of range as commanded by the control module. |
Exh. CMP Bank 1 Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position. |
Exh. CMP Bank 2 Active Counter | -- | Varies | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Exh. CMP Bank 2 Command | -- | 0% | This parameter displays the exhaust camshaft position in percent of range as commanded by the control module. |
Exh. CMP Bank 2 Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position. |
Exh. CMP Sol. Bn 1 Ckt Open Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 exhaust CAM 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. |
Exh. CMP Sol. Bn 1 Ckt Short Gnd Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 exhaust CAM 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 in the circuit. |
Exh. CMP Sol. Bn 1 Ckt Short Volts Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 exhaust CAM 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 in the circuit. |
Exh. CMP Sol. Bn 2 Ckt Open Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 exhaust CAM 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. |
Exh. CMP Sol. Bn 2 Ckt Short Gnd Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 exhaust CAM 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 in the circuit. |
Exh. CMP Sol. Bn 2 Ckt Short Volts Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 exhaust CAM 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 in the circuit. |
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 Depressed | Applied | ||
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 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 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 2 and 3 Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 & 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 Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 & 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 Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fan control relay 2 & 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. |
F/C Relay 1 Command | -- | Off | This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM. |
Fuel Level Sensor Left Tank | -- | Varies | This parameter displays the unfiltered fuel level sensor analog input for the primary fuel tank as a portion of its reference voltage. |
Fuel Level Sensor Right Tank | -- | Varies | This parameter displays the unfiltered fuel level sensor analog input for the secondary fuel tank as a portion of its reference voltage. |
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 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 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 Rail Pressure Sensor | -- | 38 kPa / 5 psi | This parameter displays fuel rail pressure at the engine. |
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 Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. |
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 volts | 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 | -- | 67.9 Liters / 17.9 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 | -- | Varies | 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 | -- | Monitoring | 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 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 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 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 | -- | 43% 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 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. |
HO2S Bank 1-2 Sensor 1-2 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 Bank 1-2 Sensor 1-2 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 Bank 1-2 Sensor 1-2 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. |
HO2S Bank 1 Sensor 1 | -- | 0-1,000 mV | A YES display indicates that the oxygen sensor is warmed up and is capable of sending useful voltage readings to the ECM. A NO display indicates a cold (not ready) oxygen sensor. Indicates the status of the fuel control exhaust oxygen sensor. The scan tool will indicate that the exhaust oxygen sensors are ready when the ECM detects a fluctuating heated oxygen sensor (HO2S) voltage sufficient to allow closed loop operation. This will not occur unless the exhaust oxygen sensors are warmed up. |
HO2S Bank 1 Sensor 1 Heater | -- | 0.50-1.00 A | This parameter displays the current through the control module when the bank 1 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 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 Bank 1 Sensor 1 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 1 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 1 Sensor 1 Heater Command | -- | 10-40% | 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 Bank 1 Sensor 2 | -- | 0-1,000 mV | The scan tool displays mV. The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 sensor 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. The scan tool displays 0 to 1275 mV. This parameter is the actual voltage on the HO2S signal circuit as measured by the ECM. |
HO2S Bank 1 Sensor 2 Heater | -- | 0.50-1.50 amps | This parameter displays the current through the control module when the bank 1 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 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 Bank 1 Sensor 2 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 1 sensor 2. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 1 Sensor 2 Heater Command | -- | 30-80% | 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 Bank 2 Sensor 1 | -- | 0-1,000 mV | This parameter indicates the HO2S bank 1 sensor 1 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. |
HO2S Bank 2 Sensor 1 Heater | -- | 0.50-1.00 amps | This parameter displays the current through the control module when the bank 2 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 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 Bank 2 Sensor 1 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 2 Sensor 1 Heater Command | -- | 10-40% | 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 Bank 2 Sensor 2 | -- | 0-1,000 mV | This parameter indicates the HO2S bank 1 sensor 2 output voltage as measured by the control module. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. The post-catalyst HO2S output voltage will fluctuate slowly over a longer period of time, compared to the fuel control oxygen sensor. This is due to the oxygen storage capacity of an efficiently operating catalyst. The scan tool displays 0 to 1,275 mV. This parameter is the actual voltage on the HO2S signal circuit as measured by the control module. |
HO2S Bank 2 Sensor 2 Heater | -- | 0.50-1.50 amps | This parameter displays the current through the control module when the bank 2 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 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 Bank 2 Sensor 2 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 2. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 2 Sensor 2 Heater Command | -- | 30-80% | 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 Heater Monitor Complete This Ignition | -- | Varies | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle. |
HO2S Heater Monitor Enabled This Ignition | -- | Varies | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle. |
HO2S/O2S Monitor Complete This Ignition | -- | Varies | This parameter displays the diagnostic monitor completion status during the current driving/monitoring cycle. |
HO2S/O2S Monitor Enabled This Ignition | -- | Varies | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle. |
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 | -- | 13-15 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 Bank 1 | -- | 1.8-2.5 ms | This parameter indicates the average commanded ON time for each injector on Bank 1 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders. |
Injector PWM Bank 2 | -- | 1.8-2.5 ms | This parameter indicates the average commanded ON time for each injector on Bank 2 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders. |
Int. CMP Angle Bank 1 | -- | 0 Degrees | This parameter displays the actual intake camshaft position in degrees. |
Int. CMP Angle Bank 2 | -- | 0 Degrees | This parameter displays the actual intake camshaft position in degrees. |
Int. CMP Bank 1 Active Counter | -- | Varies | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Int. CMP Bank 1 Command | -- | 0 % | This parameter displays the intake camshaft position in percent of range as commanded by the control module. |
Int. CMP Bank 1 Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position. |
Int. CMP Bank 2 Active Counter | -- | Varies | This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor. |
Int. CMP Bank 2 Command | -- | 0% | This parameter displays the intake camshaft position in percent of range as commanded by the control module. |
Int. CMP Bank 2 Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position. |
Int. CMP Sol Bn 1 Ckt Open Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 intake CAM 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. |
Int. CMP Sol Bn 1 Ckt Short Gnd Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 intake CAM 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. |
Int. CMP Sol Bn 1 Ckt Short Volts Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 1 intake CAM 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. |
Int. CMP Sol Bn 2 Ckt Open Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 intake CAM 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. |
Int. CMP Sol Bn 2 Ckt Short Gnd Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 intake CAM 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. |
Int. CMP Sol Bn 2 Ckt Short Volts Test Status | -- | OK | This parameter indicates the status of the output driver for the bank 2 intake CAM 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. |
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 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 Bank 1 | -- | -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. |
Long Term FT Bank 2 | -- | -10 to +10 % | The scan tool range is -99 to 99 percent. This parameter indicates the Long Term FT correction for bank 2 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. |
LT FT Test Avg. Bank 1 | -- | 0.98-1.05 % | 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. Bank 2 | -- | 0.98-1.05 % | 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. Bn 1 w/o purge | -- | 0.98-1.05 % | 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 |
LT FT Test Avg. Bn 2 w/o purge | -- | 0.98-1.05 % | 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 |
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. |
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 | -- | 2,000-4,000 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 volts (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 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 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 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. |
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. |
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. |
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 Bank 1 | -- | 0% | 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. |
Short Term FT Bank 2 | -- | 0% | 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 | -- | 0-10 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. Bank 1 | -- | 0.98-1.02% | 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 in each bank. 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. |
ST FT Test Avg. Bank 2 | -- | 0.98-1.02% | 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 in each bank. 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. |
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 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 | -- | Varies | This parameter indicates the amount of airflow compensation in response to engine intake air flow restrictions. |
TCS and Drop Throttle Status | -- | Inactive | TCS Active and Drop Throttle Control Mode is active when the Requested Torque Signal is within the TCS region, 40% to 90% duty cycle, while the Traction Control System Data Control Signal input is Active. |
TCS Torque Delivered Signal | -- | 0% | Represents the PWM signal which indicates the percent of 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. |
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 | -- | 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 | -- | 1-11 Nm / 1-8 ft-lbs | This parameter displays the engine torque based upon the airflow through the engine and the torque losses due to spark retard and fuel shutoff. Since this is a steady state engine torque, it does not include the inertial component of engine torque. |
Torque Management Spark Retard | -- | 0 Degrees | 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 displays the total knock spark retard, in terms of a crankshaft angle, requested by the knock system. |
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 | -- | 7% | 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 | 13% | ||
With ignition ON, engine OFF, accelerator pedal fully actuated | 100% | ||
TP Indicated Angle | -- | 7% | 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 | -- | 4.08 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 | 3.31 volts | ||
With ignition ON, engine OFF, accelerator pedal fully actuated | 0.80 volts | ||
TP Sensor 1 Indicated Position | -- | 7% | 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 | -- | 0.67 volts | This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle. |
TP Sensor 2 | -- | 0.92 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 | 1.67 volts | ||
With ignition ON, engine OFF, accelerator pedal fully actuated | 4.20 volts | ||
TP Sensor 2 Indicated Position | -- | 7% | 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 | 29% | ||
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. |
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. |
Traction Control Status | -- | Inactive | Scan tool displays Active or Inactive. Active displayed indicates that the traction control system is taking action to reduce drive wheel slippage. |
TWC Mon. Bank 1 Test Count | -- | Varies | This parameter indicates the number of iterations of the catalyst monitor diagnostic test that have been performed since a code clear for bank 1. It is used to determine if a sufficient number of tests have run to report a passing condition. |
TWC Mon. Bank 1 Test Result | -- | No Result | This parameter indicates the status of the catalyst monitor diagnostic for bank 1. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 1. |
TWC Mon. Bank 2 Test Count | -- | Varies | This parameter indicates the number of iterations of the catalyst monitor diagnostic test that have been performed since a code clear for bank 2. It is used to determine if a sufficient number of tests have run to report a passing condition. |
TWC Mon. Bank 2 Test Result | -- | No Result | This parameter indicates the status of the catalyst monitor diagnostic for bank 2. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 2. |
TWC Mon. Off Idle Test Conditions Met | -- | No | This parameter indicates if the off idle conditions for the catalyst monitor diagnostic have been met. Once the off idle conditions are met, Yes is displayed, the vehicle can return to idle and allow the catalyst monitor diagnostic test to run. |
TWC Mon. Test State | -- | Inactive | This parameter indicates when the catalyst monitor diagnostic is actively running a test. This condition will only be true when the vehicle is at idle. |
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 | -- | Yes | 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 | This parameter indicates the number of OBD defined warm-up cycles since the last time codes were cleared with a scan tool or, when applicable, with a battery disconnect. Once this counter reaches its maximum value, it will stop counting and will remain at its maximum value until codes are cleared. |
Warm-ups w/o Emission Faults | -- | Varies | 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 | -- | Varies | 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 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 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 400-2,200 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 19 mm Hg (10 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 19 mm Hg (10 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 19 mm Hg (10 in H2O). | ||||||
Exh. CMP Actuator Sol. Bank 1 | This function controls the exhaust camshaft actuator solenoid for bank 1. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exh. CMP Actuator Sol. Bank 2 | This function controls the exhaust camshaft actuator solenoid for bank 2. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exhaust CMP Actuator Bank 1 | This function controls the exhaust camshaft actuator for bank 1. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 50 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exhaust CMP Actuator Bank 2 | This function controls the exhaust camshaft actuator for bank 2. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 50 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
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 Relay 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 Bank 1 Sensor 1 | With the engine OFF, this output control is intended to be used as a discrete control for circuit diagnosis. The oxygen sensor heater cannot be commanded ON for more than 3 seconds, after which the heater must be disabled for 60 seconds. With the engine running, this output control is used to operate the oxygen sensor heater at various duty cycles. | ||||||
HO2S Heater Bank 1 Sensor 2 | With the engine OFF, this output control is intended to be used as a discrete control for circuit diagnosis. The oxygen sensor heater cannot be commanded ON for more than 3 seconds, after which the heater must be disabled for 60 seconds. With the engine running, this output control is used to operate the oxygen sensor heater at various duty cycles. | ||||||
HO2S Heater Bank 2 Sensor 1 | With the engine OFF, this output control is intended to be used as a discrete control for circuit diagnosis. The oxygen sensor heater cannot be commanded ON for more than 3 seconds, after which the heater must be disabled for 60 seconds. With the engine running, this output control is used to operate the oxygen sensor heater at various duty cycles. | ||||||
HO2S Heater Bank 2 Sensor 2 | With the engine OFF, this output control is intended to be used as a discrete control for circuit diagnosis. The oxygen sensor heater cannot be commanded ON for more than 3 seconds, after which the heater must be disabled for 60 seconds. With the engine running, this output control is used to operate the oxygen sensor heater at various duty cycles. | ||||||
HO2S Heater Learn | Used to reset the learned HO2S resistance values in the ECM. Perform this function when an HO2S is replaced. | ||||||
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. | ||||||
Int. CMP Actuator Sol. Bank 1 | This function controls the intake camshaft actuator for bank 1. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Int. CMP Actuator Sol. Bank 2 | This function controls the intake camshaft actuator solenoid for bank 2. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Intake CMP Actuator Bank 1 | This function controls the intake camshaft actuator for bank 1. The normal commanded states is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 50 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Intake CMP Actuator Bank 2 | This function controls the intake camshaft actuator for bank 2. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 50 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
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 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 relay is commanded ON. | ||||||
Throttle Position | Operates TAC motor 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 3.5L
| Table 1: | Engine Control Module Scan Tool Data Parameters |
| Table 2: | Engine Control Module Scan Tool Output Controls |
The Engine Control Module (ECM) Scan Tool Data List contains all ECM-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 Engine Scan Tool Data List represents values that would be seen on a normally running engine under the conditions listed below.
Note: 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.
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 | 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. Bank 1 | -- | Varies | Calculated catalytic converter temperature |
Calc. TWC Temp. Bank 2 | -- | 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. |
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 in VTD Fail Enable | -- | No | This parameter indicates Yes if a serial communication failure has been detected after the receipt of the correct vehicle theft deterrent (VTD) password. This indication is used to allow the vehicle to start on future ignition cycles in the presence of a serial communication failure. |
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. |
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 & 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 & 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 & 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 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 Speed Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump speed 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 Speed Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump speed 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 Speed Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the fuel pump speed 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 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 | -- | Varies | 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 Bank 1-2 Sensor 1-2 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 Bank 1-2 Sensor 1-2 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 Bank 1-2 Sensor 1-2 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. |
HO2S Bank 1 Sensor 1 | -- | 0-1,000 mV | A YES display indicates that the oxygen sensor is warmed up and is capable of sending useful voltage readings to the ECM. A NO display indicates a cold (not ready) oxygen sensor. Indicates the status of the fuel control exhaust oxygen sensor. The scan tool will indicate that the exhaust oxygen sensors are ready when the ECM detects a fluctuating heated oxygen sensor (HO2S) voltage sufficient to allow closed loop operation. This will not occur unless the exhaust oxygen sensors are warmed up. |
HO2S Bank 1 Sensor 1 Heater | -- | 0.50-1.00 A | This parameter displays the current through the control module when the bank 1 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 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 Bank 1 Sensor 1 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 1 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 1 Sensor 1 Heater Command | -- | 10-40% | 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 Bank 1 Sensor 2 | -- | 0-1,000 mV | The scan tool displays mV. The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 sensor 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. The scan tool displays 0 to 1275 mV. This parameter is the actual voltage on the HO2S signal circuit as measured by the ECM. |
HO2S Bank 1 Sensor 2 Heater | -- | 0.50-1.50 amps | This parameter displays the current through the control module when the bank 1 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 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 Bank 1 Sensor 2 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 1 sensor 2. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 1 Sensor 2 Heater Command | -- | 30-80% | 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 Bank 2 Sensor 1 | -- | 0-1,000 mV | This parameter indicates the HO2S bank 1 sensor 1 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. |
HO2S Bank 2 Sensor 1 Heater | -- | 0.50-1.00 amps | This parameter displays the current through the control module when the bank 2 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 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 Bank 2 Sensor 1 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 1. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 2 Sensor 1 Heater Command | -- | 10-40% | 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 Bank 2 Sensor 2 | -- | 0-1,000 mV | This parameter indicates the HO2S bank 1 sensor 2 output voltage as measured by the control module. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. The post-catalyst HO2S output voltage will fluctuate slowly over a longer period of time, compared to the fuel control oxygen sensor. This is due to the oxygen storage capacity of an efficiently operating catalyst. The scan tool displays 0 to 1,275 mV. This parameter is the actual voltage on the HO2S signal circuit as measured by the control module. |
HO2S Bank 2 Sensor 2 Heater | -- | 0.50-1.50 amps | This parameter displays the current through the control module when the bank 2 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 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 Bank 2 Sensor 2 Heater Command | -- | On | This parameter displays the commanded state of the heater control circuit for oxygen bank 2 sensor 2. The oxygen sensor heater should be on when the scan tool indicates the HO2S Heater Command is On. The oxygen sensor heater should be off when the scan tool indicates the HO2S Heater Command is Off. |
HO2S Bank 2 Sensor 2 Heater Command | -- | 30-80% | 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 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. |
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 Bank 1 | -- | 1.85-2.05 ms | This parameter indicates the average commanded ON time for each injector on Bank 1 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders. |
Injector PWM Bank 2 | -- | 1.85-2.05 ms | This parameter indicates the average commanded ON time for each injector on Bank 2 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders. |
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. |
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. |
Long Term FT Bank 1 | -- | -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. |
Long Term FT Bank 2 | -- | -10 to +10% | The scan tool range is -99 to 99 percent. This parameter indicates the Long Term FT correction for bank 2 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. |
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. Bank 1 | -- | 0.98-1.00% | 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. Bank 2 | -- | 0.98-1.00% | 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. Bn 1 w/o Purge | -- | 0.98-1.00% | 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 |
LT FT Test Avg. Bn 2 w/o Purge | -- | 0.98-1.00% | 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 | -- | 0.4-2.0 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. |
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. |
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. |
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 Bank 1 | -- | 0% | 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. |
Short Term FT Bank 2 | -- | 0% | 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. Bank 1 | -- | 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 in each bank. 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. |
ST FT Test Avg. Bank 2 | -- | 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 in each bank. 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. |
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 Retard | -- | 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. |
TWC Mon. Bank 1 Test Count | -- | Varies | This parameter indicates the number of iterations of the catalyst monitor diagnostic test that have been performed since a code clear for bank 1. It is used to determine if a sufficient number of tests have run to report a passing condition. |
TWC Mon. Bank 1 Test Result | -- | No Result | This parameter indicates the status of the catalyst monitor diagnostic for bank 1. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 1. |
TWC Mon. Bank 2 Test Count | -- | Varies | This parameter indicates the number of iterations of the catalyst monitor diagnostic test that have been performed since a code clear for bank 2. It is used to determine if a sufficient number of tests have run to report a passing condition. |
TWC Mon. Bank 2 Test Result | -- | No Result | This parameter indicates the status of the catalyst monitor diagnostic for bank 2. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 2. |
TWC Mon. Off Idle Test Conditions Met | -- | No | This parameter indicates if the off idle conditions for the catalyst monitor diagnostic have been met. Once the Off Idle Conditions Met, Yes is displayed, the vehicle can return to idle and allow the catalyst monitor diagnostic test to run. |
TWC Monitor Test State | -- | Inactive | This parameter indicates when the catalyst monitor diagnostic is actively running a test. This condition will only be true when the vehicle is at idle. |
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 Timer | -- | 0 Seconds | This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system. |
VTD Fuel Disable | -- | Inactive | This parameter indicates Yes if the vehicle theft deterrent (VTD) system has disabled fuel. |
VTD Fuel Disable Until Ign. Off | -- | No | This parameter indicates Yes if the vehicle theft deterrent (VTD) system has disabled fuel for the remainder of the ignition cycle. |
VTD Fuel Enabled | -- | Yes | This parameter indicates Yes if the vehicle theft deterrent (VTD) system has decided not to disable fuel for the remainder of the ignition cycle based upon the receipt of the correct VTD password. |
VTD Password Learned | -- | No | This parameter indicates Yes if learning of the vehicle theft deterrent (VTD) password received from the platform electronics is enabled. VTD password learning is initially enabled in the assembly plant, and may be re-enabled via either the auto learn procedure or the seed and key procedure. |
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. | ||||||
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 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 Bank 1 Sensor 1 Heater | This output control is used to override the duty cycle of the bank 1 oxygen sensor 1 heater. With the engine off, this output control is intended to be used as a discrete control for circuit diagnosis. With the engine off, none of the oxygen sensor heaters can be commanded on for more than 3 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration, typically 60 seconds, before it may be enabled again. With the engine running, this output control is used to operate the oxygen sensor heaters from 0-100 percent duty cycle in 10 percent increments. | ||||||
HO2S Bank 1 Sensor 2 Heater | This output control is used to override the duty cycle of the bank 1 oxygen sensor 2 heater. With the engine off, this output control is intended to be used as a discrete control for circuit diagnosis. With the engine off, none of the oxygen sensor heaters can be commanded on for more than 3 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration, typically 60 seconds, before it may be enabled again. With the engine running, this output control is used to operate the oxygen sensor heaters from 0-100 percent duty cycle in 10 percent increments. | ||||||
HO2S Bank 2 Sensor 1 Heater | This output control is used to override the duty cycle of the bank 2 oxygen sensor 1 heater. With the engine off, this output control is intended to be used as a discrete control for circuit diagnosis. With the engine off, none of the oxygen sensor heaters can be commanded on for more than 3 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration, typically 60 seconds, before it may be enabled again. With the engine running, this output control is used to operate the oxygen sensor heaters from 0-100 percent duty cycle in 10 percent increments. | ||||||
HO2S Bank 2 Sensor 2 Heater | This output control is used to override the duty cycle of the bank 2 oxygen sensor 2 heater. With the engine off, this output control is intended to be used as a discrete control for circuit diagnosis. With the engine off, none of the oxygen sensor heaters can be commanded on for more than 3 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration, typically 60 seconds, before it may be enabled again. With the engine running, this output control is used to operate the oxygen sensor heaters from 0-100 percent duty cycle in 10 percent increments. | ||||||
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. | ||||||
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. |
