Engine Control Module Scan Tool Information with RPO LMM
| Table 1: | Engine Control Module Scan Tool Data |
| Table 2: | Output Control |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No diagnostic trouble codes (DTCs) |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis.
Parameter | System State | Expected Value | Description |
|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories Off | |||
4WD Low Signal | 4WD Low ON | Enabled | This parameter displays the state of the transfer case based on the signal from the four wheel drive (4WD) low switch. The scan tool will display Enabled or Disabled. Enabled indicates the transfer case is in 4WD low gear and the 4WD low switch is closed, completing the low signal circuit. Disabled indicates the transfer case is not in 4WD low gear and the 4WD low switch is open. Invalid indicates there is no 4WD low. |
4WD Low OFF | Disabled | ||
No 4WD Low | Invalid | ||
4WD Signal | 4WD ON | Enabled | This parameter displays the state of the transfer case based on the signal from the front axle indicator switch. The scan tool will display Enabled or Disabled. Enabled indicates the front axle is locked in 4WD and the front axle indicator switch is closed, supplying voltage to the controller on the axle switch signal circuit. Disabled indicates the transfer case is not in 4WD and the front axle indicator switch is open. |
4WD OFF | Disabled | ||
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 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 3 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 Compressor Cycling Switch | -- | Normal | Normal/Low Pressure |
A/C Relay Command | A/C OFF | OFF | This parameter displays the commanded state of the air conditioning (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. |
A/C ON | ON | ||
A/C Request Signal | A/C ON | YES | The scan tool displays YES/NO. The HVAC module receives an input request when the HVAC module is turned On. |
A/C OFF | NO | ||
A/C High side Pressure Sensor | A/C OFF | 1.43 Volts | The scan tool displays 0-5 volts. The voltage applied to the ECM input for the A/C refrigerant pressure sensor. |
A/C ON | 2.39 Volts | ||
A/C High side Pressure Sensor | A/C OFF | 500-2,220 kPa (72-31 psi) | The scan tool displays 0-3450 kPa (0-500 psi). The voltage applied to the ECM input from the A/C refrigerant pressure sensor is converted to a pressure value. |
A/C ON | 300-1,220 kPa (43-17 psi) | ||
A/C High Side Pres. Sw. | -- | Normal | The scan tool displays High Press./Normal, the state of the A/C high side pressure. |
A/C OFF for WOT | A/C ON/WOT | NO | The scan tool displays YES/NO. The state of the A/C request related to wide open throttle. |
A/C ON/Not WOT | Yes | ||
A/C Pressure Disable | -- | NO | The scan tool displays YES/NO. The state of the A/C refrigerant pressure sensor and circuitry. |
A/C Disengage 1-8 History | A/C ON | Reason for A/C Disengagement | The scan tool displays None, A/C Pressure, Engine Speed, Battery Voltage, Anti-Stall, RPM Unstable, WOT, Launch Performance or Coolant Hot. The scan tool displays None if OK. |
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 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 | 0.7-1.2 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 | 4.2-4.5 Volts | ||
APP Sensor 1 Indicated Position | Accelerator pedal not actuated | 0.0% | 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 at rest position | 0.3-0.5 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 at WOT | 2.0-2.5 Volts | ||
APP Sensor 2 Indicated Position | Accelerator pedal at rest position | 0.0% | 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 at WOT | 100% | ||
Balancing Rate Cyl. 1-8 | -- | Varies | These parameters display the adjustment in fuel volume for each cylinder as calculated by the control module. The scan tool will display a negative balancing rate if the fuel volume is lowered. The scan tool will display a positive balancing rate if the fuel volume is increased. |
BARO | -- | Varies with 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. |
Base Injector Fuel Rate | -- | Varies | It display base calculate rate fuel delivers. The rate is calculated in cubic millimeters. |
Boost Pressure Sensor | -- | Varies | This parameter shows the turbocharger boost pressure in kPa. |
BPP Circuit Signal | Released | OK/Fault/Invalid | This parameter displays the status of the brake pedal position circuit. |
BPP Signal | Released | Applied / Release | This parameter displays the status of the brake pedal as determined by the ECM. |
Commanded A/F Equivalence Ratio | -- | 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. |
Component Monitor Complete This Ignition | -- | No | This parameter displays the component monitor completion status during the current driving/monitoring cycle. |
Component Monitor Enabled This Ignition | -- | No | This parameter displays the component monitor completion status during the current driving/monitoring cycle. |
Coolant Level Switch | -- | OK | This parameter displays the level of engine coolant as determined by the control module. The control module determines the level of the coolant using the signal from a switch used to monitor the engine coolant level. The scan tool will display low when the engine coolant level is low. The scan tool will display OK when the coolant level is correct. |
Cooling Fan Command | -- | % | This parameter displays the cooling fan duty cycle. |
Cooling Motor Fan Command | -- | % | This parameter displays the cooling fan duty cycle. |
Crank Request Signal | -- | No | This parameter displays the state of the crank request input to the control module from the ignition switch. The scan tool will display Yes when the ignition switch is in the Crank position. The scan tool will display No when the ignition switch is in any other position. |
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 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 Disengage 1-8 History | Cruise ON | Reason for Cruise Disengagement | The Scan tool displays the last 8 cruise control disengages in order from 1 to 8. There are 20 possible causes for the cruise control to disengage. |
Cruise On/Off Switch | -- | Off | This parameter displays the state of the On/Off switch input to the control module. The scan tool will display On when the cruise On/Off switch is On. The scan tool will display OFF when the cruise ON/OFF switch is OFF. |
Cruise Resume/Accel Switch | -- | Inactive | This parameter displays the state of the Resume/Accel switch input to the control module When the cruise control switch is in the On position and the Resume/Accel switch is activated, the scan tool displays On. When the Resume/Accel switch is released the scan tool displays Off. |
Cruise Set/Coast Switch | -- | Inactive | This parameter displays the state of the Set/Coast switch input to the control module from the cruise control system. When the cruise control switch is in the on position and the Set/Coast switch is activated, the scan tool displays On. When the Set/Coast switch is released the scan tool displays Off. |
Current Fuel Type | -- | Diesel | The parameter will display diesel as the current fuel type. |
Des. TC Vane Pos. Ctrl. Solenoid | -- | Varies | This parameter displays the desired current draw of the turbocharger vane position control solenoid valve as calculated by the control module. The scan tool will display a high value if the solenoid is commanded open, and a lower value when the solenoid is commanded closed. |
Desired EGR Position | -- | 22-28% | This parameter displays the position of the exhaust gas recirculation (EGR) valve commanded by the control module. The scan tool will display 0 percent when the control module is commanding the EGR valve closed. The scan tool will display a higher percentage when the EGR valve is commanded open. |
Desired Fan Speed | -- | Varies | This parameter displays the fan idle speed in RPM as commanded by the control module. The control module compensates for various engine loads in order to maintain the desired fan speed at idle. This parameter is not valid unless the engine is running. |
Desired Fuel Rail Pressure | -- | Varies | This parameter displays the desired fuel rail pressure as calculated by the control module. This value is calculated based on engine speed, engine load, and sensor inputs. The scan tool will display a higher value at higher engine speeds and loads, and a lower value at idle. |
Desired IAF Valve Position | -- | 100 % | This parameter will display the position of the intake air flow valve and it will display it in percentage. |
Desired Idle Speed | -- | 680 RPM | This parameter displays the engine idle speed in RPM as commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine speed at idle. This parameter is not valid unless the engine is running. |
Desired TC Boost | -- | Varies | This parameter displays the TC Boost pressure as commanded by the control module. This parameter shows the turbocharger boost pressure in kPa. |
Desired TC Vane Position | -- | Varies | This parameter displays the position of the turbocharger vane position sensor as the turbocharger vane position is commanded by the control module. The scan tool will display 0 percent when the control module is commanding the vanes open. The scan tool will display a higher percentage when the vanes are commanded closed. |
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. |
Distance Since Last DPF Regeneration | -- | Varies | This parameter will display the amount of vehicle travel after a DPF regeneration. This parameter will be displayed in km/miles. |
DPF Lamp Command | -- | Off | This parameter will display the status of the IPC mounted DPF status light. This parameter will display On/Off. |
DPF Pressure Sensor | -- | Varies | This parameter will display the voltage differential between the front and rear pressures at the DPF as calculated by the ECM. This will be displayed in volts. As the DPF becomes restricted the differential pressure increases and the voltage we get higher. |
DPF Soot Mass | -- | Varies | This parameter displays the amount of calculated soot in exhaust particulate filter. This parameter will be displayed in grams. |
EC Ignition Relay Command | -- | ON | This parameter displays the commanded state of the engine control (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 Challenge Status | -- | Valid | This parameter displays the condition of the ECM code challenge to the BCM. |
ECM in VTD | Fail / Enable | No | This parameter displays the status of the vehicle theft deterrent system. |
ECT Sensor 1 | 85-105°C/185-220°F | 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. | |
EGR Cooler Temp. Sensor 1 | -- | Varies | This parameter will display the exhaust temperature entering the EGR Cooler. The EGR Temp Sensor 1 temperature will be warmer than the EGR Temp Sensor 2. |
EGR Cooler Temp. Sensor 2 | -- | Varies | This parameter will display the exhaust temperature exiting the EGR Cooler. The EGR Temp Sensor 2 temperature will be cooler than the EGR Temp Sensor 1. |
EGR Learned Minimum Position | 0% | This parameter displays the learned minimum position of the EGR valve as calculated by the control module. The scan tool will display a low value if the current closed EGR position is the same as the last ignition cycle. The scan tool will display a higher value if the EGR valve has closed at a new position. | |
EGR 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 and No. |
EGR Monitor Enabled 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 and No. |
EGR Pos. Lrn. This Run Cycle | Yes / No | -- | This parameter displays the condition of the Learned EGR position by the ECM. |
EGR Position Variance | % | -- | This parameter displays the EGR position variance from the last learned position. |
EGR Position Sensor | 22-28% | This parameter displays EGR valve position as calculated by the control module based on an input from the EGR valve position sensor. The scan tool will display a lower value when the EGR valve is closed, and a higher value when the EGR valve is open. | |
EGR Position Sensor | 1.75 Volts | This parameter displays the voltage signal received from the EGR valve position sensor by the control module. The scan tool will display a lower value when the EGR valve is closed, and a higher value when the EGR valve is open. | |
EGR Solenoid Command | 3-15% | This parameter displays the duty cycle commanded by the control module for the EGR valve. The scan tool will display a high percentage when the EGR valve is commanded open. The scan tool will display a low percentage when the EGR valve is commanded closed. | |
EGT Sensor 1 | -- | Varies | This parameter will display the exhaust temperature before the DPF. When the exhaust temperature is low, the scan tool will display a low temperature. When the exhaust temperature is high, the scan tool will display a high temperature. |
EGT Sensor 2 | -- | Varies | This parameter will display the exhaust temperature after the DPF. When the exhaust temperature is low, the scan tool will display a low temperature. When the exhaust 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 Level Switch | OK | This parameter displays the status of the engine oil level switch as determined by the control module. The control module uses this information to turn on the low engine oil lamp if the engine oil level remains approximately 1 quart low for a sufficient amount of time. The scan tool will display Low when the engine oil level is low. The scan tool will display OK when the engine oil level is correct. | |
Engine Oil Life Remaining | Varies | This parameter displays the amount engine oil life remaining before requiring an oil change based on calculations by the control module. The scan tool will display lower values as the engine oil life approaches 0 miles. | |
Engine Oil Pressure Switch | -- | OK | This parameter displays the state of the EOP as determined by the control module. The control module monitors the EOP switch to determine if the EOP is sufficient. The scan tool will display low when the EOP is below a predetermined value. |
Engine Oil Pressure Sensor | -- | Varies | This parameter displays the pressure of the engine oil as calculated by the control module using a signal from the engine oil pressure (EOP) sensor. The scan tool will display oil pressure when the engine is running. The engine oil pressure sensor has a range of values indicating a low value when the oil pressure is low to a high value when the oil pressure 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 Run Time Since Last DPF Regeneration | -- | Varies | This parameter displays the total of time since the last regen. This parameter will be displayed in hours, minutes and seconds. |
Engine Speed | 680 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 Torque | -- | Varies | This parameter displays the estimated amount of torque that is delivered from the engine. The scan tool displays engine torque in N·m (lb-ft). The ECM sends the engine torque information to the TCM via the high speed GMLAN serial data line. |
EPM Inhibit Reason | None | -- | This parameter displays the reason for EPM inhibit. |
Exhaust Brake Switch, if equipped | -- | Off | This parameter displays the input status of the exhaust brake switch to the control module. The scan tool will display ON or OFF. ON indicates the exhaust brake switch is closing the exhaust brake request circuit to the control module. OFF indicates the exhaust brake switch is open. |
Ext. Travel BPP Ckt Signal | Released | -- | This parameter displays the status of the Ext Travel BPP signal circuit. |
Ext. Travel BPP Signal | Released | -- | This parameter displays the status of the Ext. Travel Brake Pedal Position sensor. |
Fan Speed | -- | Varies | This parameter displays the speed of the fan as determined by the control module. The scan tool will display a high value at high engine speeds and a low value at low engine speeds. |
FC Ckt Open Test | Status | OK | This parameter displays the status of the fan control circuit open test. |
FC Relay 3 Circuit Status Open | -- | OK | This parameter displays the diagnostic state of the output driver for the cooling fan relay 1 control circuit. The scan tool will display OK, Incomplete, Short B+, Short Gnd/Open. The scan tool will display OK if the circuit is operating correctly. |
FRP Regulator Command | -- | 35-40% | This parameter displays the fuel rail pressure regulator duty cycle as commanded by the control module. The scan tool will display a lower value for a higher commanded fuel pressure, and a higher value for a lower commanded fuel pressure. |
Fuel Filter Life Remaining | -- | Varies | This parameter displays the fuel filter life remaining before requiring an fuel filter change. This number is calculated by the control module based on many inputs and is displayed as a percent. The lower the percentage, the sooner the next fuel filter change will be required. |
Fuel Level Sensor | -- | Varies | This parameter displays the voltage from the sensor used to monitor the fuel level inside the fuel tank. The scan tool will display a low voltage reading when that the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full. |
Fuel Level Sensor Rear Tank | -- | Varies | This parameter displays the voltage from the sensor used to monitor the fuel level inside the fuel tank. The scan tool will display a low voltage reading when that the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full. |
Fuel Pump Relay Command | -- | Varies with fuel level | 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 | -- | 35-40 MPa (5076-5801 psi) | This parameter displays the fuel rail pressure as calculated by the control module. This value is calculated based on engine speed, engine load, and sensor inputs. The scan tool will display a higher value at higher engine speeds and loads, and a lower value at idle. |
Fuel Rail Pressure Sensor | -- | Varies | This parameter displays the voltage signal sent to the control module from the sensor used to measure the fuel rail pressure. The scan tool will display a low voltage at idle and high voltage when pressure demands are high. |
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as measured in liters or gallons. The control module determines the amount of fuel remaining in the tank by using information from the fuel level sensor(s). The scan tool will display a higher value with a full fuel tank, and a lower value with an empty fuel tank. |
Fuel Temperature Sensor | -- | Varies | This parameter displays the current fuel temperature as calculated by the control module based on input from the fuel temperature sensor. The scan tool will display a higher value at higher fuel temperatures. The scan tool will display a lower value at lower fuel temperatures. |
Fuel Transfer Pump Command | -- | Varies with Fuel Level | 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 Used Since Last DPF Regeneration | -- | Varies | This parameter will display the amount of fuel used since last regeneration of the exhaust particulate filter. |
GEN F-Terminal Signal | -- | 0-100% | This parameter indicates the generator field duty cycle as commanded by the voltage regulator or control module. The scan tool will display a higher value for a higher commanded generator output, and a lower value for a lower commanded generator output. |
GEN L-Terminal Circuit Open Status | -- | OK | This parameter displays the diagnostic state of the Gen L-Terminal circuit. The scan tool will display OK, Incomplete, Short B+/Open, Short Gnd. The scan tool will display OK if the circuit is operating correctly. |
GEN L-Terminal Command | -- | 0-100% | This parameter displays the control modules commanded state of the voltage regulator on the generator. |
Glow Plug Command | -- | OFF | This parameter displays the voltage supply to the glow plugs as measured by the control module. The scan tool will display a higher value at high voltages, or a lower value at lower voltages. |
High Idle Switch | -- | Off | This parameter displays the state of the high idle request input to the control module from the high idle switch. The scan tool will display ON or OFF. ON indicates the control module is receiving a request from the high idle switch to increase engine speed. OFF indicates the control module is not receiving a request from the high idle switch to increase engine speed. |
IA Flow Valve Learned Closed Position | 0% | -- | This parameter displays Learned Closed Position of the IA flow valve. |
IA Flow Valve Motor Command | -- | 0% | This parameter displays the duty cycle command by the control module for the IA Flow Valve. |
IAF Valve Learned Minimum | -- | 1% | This parameter displays the learned value of the intake air flow valve. This value will be displayed in percent. |
IAF Valve Position | -- | 100% | This parameter displays the actual position of the intake air flow valve. |
IAF Valve Pos. Sensor | -- | 4.27 Volts | This parameter displays the voltage signal sent to the control module from the intake air valve. The intake air valve is a range of values indicating a high voltage when the throttle is closed to a low voltage when the throttle plate is fully open. |
IAT Sensor 1 | -- | Varies | This parameter displays the temperature of the air entering the engine as calculated by the control module based on the input from the intake air temperature (IAT) sensor. The scan tool will display a low value when the air temperature is low, and a high value when the air temperature is high. |
IAT Sensor 2 | -- | Varies | This parameter displays the temperature of the air entering the engine as calculated by the control module based on the input from the intake air temperature (IAT) sensor 2. The scan tool will display a low value when the air temperature is low, and a high value when the air temperature is high. |
Ignition 1 Signal | -- | Battery Voltage | 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. The scan tool will display a low value when the voltage is low. The scan tool will display a high value, such as battery voltage, when the voltage is higher. |
Ignition Accessory Signal | -- | OFF | 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. |
Injection Pump Cam Reference Signal Missed | -- | Counts | This parameter will display the number of reference signals missed. |
Injector Timing | -- | Varies | Indicates the current timing of the main injection pulse as calculated by the control module. The scan tool will display a higher value for a main injection event farther from top dead center (TDC). The Scan tool will display a lower value for a main injection event closer to TDC. |
Intake Air Heater Command | -- | Off | This parameter displays duty cycle of the IAH as commanded by the control module. |
% | |||
MAF Sensor | Engine Idling | 9-20 g/s | This parameter indicates the quantity calculated by the control module based on a signal from the MAF sensor. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds. |
Engine speed at 2,500 RPM | 130-150 g/s | ||
MAF Sensor | -- | 2300-3100 Hz | This parameter indicates the frequency signal received from the MAF sensor by the control module. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds. |
MAP Sensor | 0.95-1.06 Volts | This parameter indicates the voltage signal received by the control module from the MAP sensor. The scan tool displays a low voltage at idle, and a high voltage at wide open throttle. Barometric pressure and altitude can effect these values. | |
Misfire Current Cyl. 1-8 | -- | 0 | This parameter displays the number of possible misfires during the last 200 cylinder firing events detected on Cylinders 1-8 as calculated by the control module. The misfires are calculated based on engine crankshaft rotation speed variations. The scan tool displays an incrementing counter. This counter should display some activity, but the activity should be the same for all cylinders. |
Misfire Monitor Complete This Ignition | -- | Varies | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle. |
Misfire Monitor Enabled This Ignition | -- | Varies | This parameter displays the diagnostic monitor enable status during the current driving/monitoring cycle. |
Particulate Filter Pressure Variance | -- | Varies | This parameter will display the pressure differential between the front and rear pressures at the DPF as calculated by the ECM. This will be displayed in kPa. As the DPF becomes restricted the differential pressure will increase. |
Pilot Inj. Cyl 1-8 Command | -- | On | This parameter displays the commanded state of the fuel injectors for the pilot injection pulse as commanded by the ECM. |
PNP Switch | -- | Park/Neutral | This parameter indicates the range selection of the automatic transmission as calculated by the control module based on input from the PNP switch. The scan tool will display, In Gear, Park, or Neutral depending on the PNP switch position. |
PTO Active | -- | No | The scan tool will display Yes or No indicating the PTO is in operating function. |
PTO Enable | -- | No | This parameter indicates all parameter have been met to enable the power take off (PTO), and the control module has determined that the power take off (PTO) is engaged. |
PTO Engage Relay Command | -- | Off | This parameter displays the commanded state of the PTO relay control circuit. The scan tool will display ON or OFF. ON indicates the PTO relay control circuit is being grounded by the control module, allowing voltage to the load engage switch. OFF indicates the PTO relay is not being commanded on by the control module. |
PTO Engine Shutdown | -- | No | This parameter displays the input status of the PTO engine shutdown switch to the control module. The scan tool will display YES or NO. Yes indicates the PTO engine shutdown switch is closed, grounding the engine shutoff signal circuit to the control module. OFF indicates the engine shutoff switch is open, allowing normal engine and PTO operation. |
PTO Feedback Signal Relay | -- | OFF | This parameter displays the status of the PTO relay. |
PTO Remote Start Request Signal | -- | PTO Off | The scan tool displays PTO Off, PTO On, Set 1, Set 2, No Action, Invalid, or Indeterminate. The PTO module monitors the signal circuit of the PTO remote switch. |
Reduced Engine Power | -- | Inactive | This parameter will display the fuel system status as commanded by the ECM. |
Regeneration Inhibition Reason | -- | Varies | This parameter displays the reason why a regeneration is not allowed. |
Regeneration Status | -- | Active, Not Required, or Complete | This parameter displays the regeneration state. |
Start Up ECT | -- | Varies | This parameter Indicates the engine coolant temperature at engine start up as calculated by the control module based on the signal from the ECT sensor. The scan tool will display a higher value on a warmer engine, and a lower value on a colder engine. |
Start Up Fuel Temperature | -- | Varies | This parameter Indicates the fuel temperature at engine start up as calculated by the control module based on the signal from the fuel temperature sensor. The scan tool will display a higher value on a warmer fuel, and a lower value on a colder fuel. |
Start Up IAT | -- | Varies | This parameter Indicates the intake air temperature at engine start up as calculated by the control module based on the signal from the IAT sensor. The scan tool will display a higher value during warmer under hood temperatures, and a lower value during colder under hood temperatures. |
Start Up IAT Sensor 2 | -- | Varies | This parameter Indicates the intake air temperature at engine start up as calculated by the control module based on the signal from the IAT sensor 2. The scan tool will display a higher value during warmer under hood temperatures, and a lower value during colder under hood temperatures. |
Starter Relay Command | -- | Off | The scan tool displays ON/OFF. The scan tool displays Off until the ignition is placed into the CRANK position, then it reads On. |
TC Vane Pos. Ctrl. Solenoid | -- | 1.0-1.5 amps | This parameter displays the current draw of the vane position control solenoid through the control module. The scan tool will display a high current draw when the turbocharger vanes are being commanded closed. The scan tool will display a lower current draw when the turbocharger vanes are being commanded open. |
TC Vane Position Lrn. Since DTC Clear | -- | Yes | This parameter indicates the status of the control module in learning the turbocharger vane position. The Scan tool will display Yes if the turbocharger vane position has been learned any time after the DTCs have been cleared. The scan tool will display No if the turbocharger vane position has not been learned since the last DTC clear. The control module will attempt to relearn during every ignition cycle. A relearn must be completed after any service on the turbocharger or control module. |
TC Vane Position Lrn. This Run Cycle | -- | Yes | This parameter indicates the status of the control module in learning the turbocharger vane position. The Scan tool will display Yes if the turbocharger vane position has been learned this ignition cycle. The scan tool will display No if the turbocharger vane position has not been learned this ignition cycle. The control module will attempt to relearn during every ignition cycle. A relearn must be completed after any service on the turbocharger or control module. |
TC Vane Pos. Ctrl. Solenoid | -- | Varies | This parameter displays the current commanded state of the turbocharger vane position control solenoid valve by the control module. The scan tool will display a higher value as the solenoid is commanded open. The scan tool will display a lower value as the solenoid is commanded closed. |
TC Vane Position Learn Status | -- | Yes | This parameter indicates the status of the control module in learning the turbocharger vane position. The scan tool will display No if the turbocharger vane position has not been learned since the last DTC clear. |
TC Vane Position Sensor | -- | Varies | This parameter displays the current commanded state of the turbocharger vane position control solenoid valve by the control module. The scan tool will display a higher value as the solenoid is commanded open. The scan tool will display a lower value as the solenoid is commanded closed. |
TC Vane Position Sensor | -- | Varies | This parameter displays the voltage signal sent to the control module from the sensor. The scan tool will display a higher value as the solenoid is commanded open. The scan tool will display a lower value as the solenoid is commanded closed. |
TCC/Cruise Brake Pedal Switch | -- | This parameter displays the state of the brake pedal as determined by the control module. The control module monitors the pedal switch on the brake pedal for vehicles equipped with an automatic transmission. The control module uses this information to release the torque convertor clutch when the brake pedal is applied. The scan tool will display Applied when the brake pedal is depressed. the scan tool will display Released when the brake pedal is not applied. | |
TCM MIL Request | -- | Off | This parameter indicates that a related transmission DTC set in the transmission control module (TCM) by displaying On/Off. The ECM turns ON the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination. |
Vehicle Speed Sensor | -- | 0 km/mi | 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. |
VTD Auto. Learn Timer | -- | Inactive | This parameter indicates that either the auto learn timer (used in the auto learn procedure to enable VTD password learning) or the seed and key timer (used in the seed and key procedure to enable VTD password learning) is active. |
H:M:S | |||
VTD Fuel Disable | -- | Inactive | This parameter indicates the VTD system has disabled fuel. |
VTD Fuel Disable Until Ign. Off | -- | NO | This parameter indicates the VTD system has disabled fuel for the remainder of the ignition cycle. |
VTD Fuel Enabled | -- | Active | This parameter indicates the VTD system has enabled fuel. |
VTD Password Learn Enabled | -- | Yes | This indicates learning of the VTD password received from the platform electronics is enabled. VTD password learning is first enabled in assembly plant (prior to the manufacturer’s enable counter being set to zero) may be re-enabled using 1 of 2 procedures. |
VTD Security Code Accepted | -- | Yes | This parameter displays if the theft deterrent code was accepted by the ECM. |
VTD Security Code Lockout | -- | Inactive | This parameter displays if the VTD code is locked out of the ECM. |
VTD Security Code Programmed | -- | Inactive | This parameter displays if the theft deterrent code is currently being programmed in the ECM. |
VTD Security Info Programmed | -- | Yes | This parameter displays if the theft deterrent code has been programmed in the ECM. |
VTD System Status | -- | Standby | This parameter displays the VTD system status in the BCM. |
Wait to Start Indicator | -- | Light OFF | The wait to start indicator illuminates with the ignition ON and the engine OFF. The wait to start indicator will not illuminate during post-start glow plug operation. |
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 w/o Emission Faults | -- | 0 | This parameter indicates the number of warm up cycles that have occurred without an emission fault present. The scan tool will display a 0 if a fault has occurred. The scan tool will display a higher count if a number of warm up cycles have occurred without an emission fault. |
Warm-ups w/o Non-emission Faults | -- | 0 | This parameter indicates the number of warm up cycles that have occurred without a non-emission fault present. The scan tool will display a 0 if a fault has occurred. The scan tool will display a higher count if a number of warm up cycles have occurred without a non-emission fault. |
Water in Fuel Sensor | -- | No Water | This parameter will display Water if fuel is present in the fuel or No Water when water is no longer present in the fuel. |
Parameter | Description |
|---|---|
A/C Relay | The engine must be running and the ECM must receive an A/C request from the HVAC control module in order to enable the output control. The ECM de-energizes the A/C compressor clutch relay when you select OFF. The relay remains de-energized until you select ON. |
Balance Rate Monitor | This function will allow actual balance rate values to be displayed. |
Cooling Fan | The percent of engine cooling fan requested from the ECM. |
Cylinder Power Balance | Disables each fuel injector. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool. |
Dash Lamps | Malfunction Indicator Lamp--Activates the malfunction indicator lamp (MIL). The MIL will remain illuminated until cancelled by the scan tool. |
DPF Regeneration Indicator | This function will activate the Clean Exhaust Filter message or green indicator lamp and will remain ON until it is cancelled with the scan tool. |
DPF Regeneration Enable | This function enables a DPF Regen when the vehicle meets the conditions for running. This function will by-pass the normal soot model, so the next time the vehicle is under the conditions for an active regeneration to take place, the ECM will go ahead and initiate the regeneration event. |
DPF Reset Replace DPF | Resets all DPF parameters to zero. |
DPF Service Regeneration | This function enables a DPF Regen. The engine coolant must be greater than 70-115°C (158-239°F). Vehicle must be in Park. Ambient temperature must be greater than -30°C (-22°F). Brake pedal and accelerator must be in the released position. The scan tool will display all inhibit reasons. The scan tool must remain connected until test is complete. This function takes approximately 35 minutes to complete. During this procedure the RPM will slowly increase to 2,500 RPM and remain there for approximately 25 minutes. |
EGR Solenoid | Activates the exhaust gas recirculation (EGR) solenoid ON or OFF. The EGR position is limited to 40 percent duty cycle, which is 100 percent commanded open valve. The device control is limited to 10 seconds ON, with a 10 second OFF cooling time. This device control is disabled by DTC P0403. |
Engine Speed Control | Adjusts the engine speed in 25, 100, or 500 RPM increments between 600-1500 RPM. The Device Control will not change unless changed or cancelled by the scan tool. |
Engine Shutdown | The scan tool displays On or Off. This is the state of the engine shutdown indicator as commanded by the IPC. |
Fuel Injector Balance Procedure | Disables each fuel injector injection. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool. |
Fuel Pressure Control | This parameter displays the fuel rail pressure regulator duty cycle as commanded by the control module. The scan tool will display a lower value for a higher commanded fuel pressure, and a higher value for a lower commanded fuel pressure. |
Fuel Pump | Activates the fuel transfer pump or prime pump (depending on application) ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool. |
Fuel Transfer Pump Relay | This function commands the fuel transfer pump relay ON/OFF. |
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. |
IAF Valve Motor | This function increases or decreases the position of the IAF valve. |
IAF Valve Position | This parameter displays the actual position of the intake air flow valve. |
Pilot Injector Balance Procedure | Disables each fuel injector pilot injection. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool. |
TC Vane Position Sensor | Adjusts the turbocharger vane position in 5 percent increments from 0-100 percent. The device control will be aborted if engine speed is above idle or if the coolant temperature is too cold. |
TC Vane Solenoid | Cycles the turbocharger vane position solenoid to 100 percent boost and back to 0 percent boost. The device control is limited to engine speeds less than 1,500 RPM and will be disabled if DTC P0047 or P0048 are set. |
Wait to Start | The scan tool displays On or Off. This is the state of the wait to start indicator as commanded by the PCM. |
Engine Control Module Scan Tool Information with RPO LF8
| Table 1: | Engine Control Module Scan Tool Data |
| Table 2: | Output Control |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No DTCs |
| • | On-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis.
Parameter | System State | Expected Value | Description | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories OFF | |||||||||||||||||||
5-volt Reference 1 | -- | 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 | -- | 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. | ||||||||||||||||
5-volt Reference 3 | -- | 5 Volts | This parameter displays the voltage sensed on the 5-volt reference 3 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 Request signal | -- | NO | The scan tool displays YES/NO. The HVAC module receives an input request when the HVAC module is turned ON. | ||||||||||||||||
Actual Fuel Rail Pressure | -- | 35-40 MPa (5076-5801 psi) | This parameter displays the fuel rail pressure as calculated by the control module. This value is calculated based on engine speed, engine load, and sensor inputs. The scan tool will display a higher value at higher engine speeds and loads, and a lower value at idle. | ||||||||||||||||
After Injection Fuel Rate | -- | Varies | This parameter indicates the quantity of fuel delivered in the post injection fuel pulses. A higher value indicates a larger quantity of fuel. | ||||||||||||||||
APP Indicated Angle | Accelerator pedal not actuated | 0% | This parameter displays the angle 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 | 0.7-1.2 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 | 4.2-4.5 Volts | ||||||||||||||||||
APP Sensor 2 | Accelerator pedal at rest position | 0.3-0.5 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 at WOT | 2.2-2.5 Volts | ||||||||||||||||||
APP Sensor 3 | Accelerator pedal at rest position | 2.2-2.5 Volts | This parameter displays the voltage signal sent to the control module from accelerator pedal position (APP) sensor 3 of the APP sensor assembly. APP sensor 3 is a range of values indicating a high voltage when the accelerator pedal is not depressed to a low voltage when the accelerator pedal is fully depressed. | ||||||||||||||||
Accelerator pedal at WOT | 0.3-0.5 Volts | ||||||||||||||||||
Balancing Rate Cyl. 1-6 | -- | Varies | These parameter display the adjustment in fuel volume for each cylinder as calculated by the control module. The scan tool will display a negative balancing rate if the fuel volume is lowered. The scan tool will display a positive balancing rate if the fuel volume is increased. | ||||||||||||||||
BARO | -- | Varies with 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. | ||||||||||||||||
Basic Injector Fuel Rate | -- | Varies | This parameter displays the base calculate fuel delivery to each cylinder. The rate is calculated in cubic millimeters by the ECM. | ||||||||||||||||
Battery Voltage | -- | 11-14 Volts | This parameter displays the voltage measured at the battery circuit of the control module. Voltage is applied to the control module from the battery at all times. The scan tool will display a low value when sensed battery voltage is low, and a high value when sensed battery voltage is high. | ||||||||||||||||
Boost Pressure Sensor | -- | Varies | This parameter indicates the turbocharger boost pressure inside the engine as calculated by the control module based on the signal from the Boost pressure sensor. The scan tool will display a higher value under heavy load, and a lower value at idle. | ||||||||||||||||
CAM Signal Present | -- | Yes | This parameter displays the state of the CMP signal as determined by the control module. The scan tool will display Yes if the CMP signal is being received by the control module. The scan tool will display No if the CMP signal is missing. | ||||||||||||||||
Clutch Pedal Switch | -- | Released | This parameter displays the current state of the clutch pedal as determined by the control module. The scan tool will display Applied when the clutch pedal is depressed, and Released when the clutch pedal is not depressed. | ||||||||||||||||
Crank Request Signal | -- | No | This parameter displays the state of the crank request input to the control module from the ignition switch. The scan tool will display Yes when the ignition switch is in the Crank position. The scan tool will display No when the ignition switch is in any other position. | ||||||||||||||||
Crank Signal Present | -- | Yes | This parameter displays the state of the CKP signal as determined by the control module. The scan tool will display Yes if the CKP signal is being received by the control module. The scan tool will display No if the CKP signal is missing but the CMP signal is present. | ||||||||||||||||
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 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 | This parameter displays the state of the ON/OFF switch input to the control module. The scan tool will display ON when the cruise ON/OFF switch is ON. The scan tool will display OFF when the cruise ON/OFF switch is OFF. | ||||||||||||||||
Cruise Release Brake Pedal Switch | -- | OFF | This parameter displays the state of the Cruise Release Brake Pedal Switch to the control module. The scan tool will display ON when the brake pedal is depressed. The scan tool will display OFF when the brake switch is released. | ||||||||||||||||
Cruise Resume/Accel Switch | -- | Inactive | This parameter displays the state of the Resume/Accel switch input to the control module When the cruise control switch is in the ON position and the Resume/Accel switch is activated, the scan tool displays ON. When the Resume/Accel switch is released, the scan tool displays OFF. | ||||||||||||||||
Cruise Set/Coast Switch | -- | Inactive | This parameter displays the state of the Set/Coast switch input to the control module from the cruise control system. When the cruise control switch is in the ON position and the Set/Coast switch is activated, the scan tool displays ON. When the Set/Coast switch is released, the scan tool displays OFF. | ||||||||||||||||
Desired EGR Position | -- | 22-28% | This parameter displays the position of the exhaust gas recirculation (EGR) valve commanded by the control module. The scan tool will display 0 percent when the control module is commanding the EGR valve closed. The scan tool will display a higher percentage when the EGR valve is commanded open. | ||||||||||||||||
Desired Fuel Rail Pressure | -- | Varies | This parameter displays the desired fuel rail pressure as calculated by the control module. This value is calculated based on engine speed, engine load, and sensor inputs. The scan tool will display a higher value at higher engine speeds and loads, and a lower value at idle. | ||||||||||||||||
Desired IAF Valve Position | -- | 100% | This parameter will display the position of the intake air flow valve, and it will display it in percentage. | ||||||||||||||||
Desired Idle Speed | -- | 680 RPM | This parameter displays the engine idle speed in RPM as commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine speed at idle. This parameter is not valid unless the engine is running. | ||||||||||||||||
Desired Boost | -- | Varies | This parameter displays the Boost pressure as commanded by the control module. This parameter shows the turbocharger boost pressure in kPa. | ||||||||||||||||
Desired FRP Regulator | -- | Varies | This parameter displays the desired current draw of the fuel rail pressure (FRP) regulator as calculated by the control module. The scan tool will display a low value if the regulator is commanded open, and a higher value when the regulator is commanded closed. | ||||||||||||||||
Desired TC Vane Position | -- | Varies | This parameter displays the position of the turbocharger vane position sensor as the turbocharger vane position is commanded by the control module. The scan tool will display 0 percent when the control module is commanding the vanes open. The scan tool will display a higher percentage when the vanes are commanded closed. | ||||||||||||||||
Desired TC Vane Pos. Ctrl. Solenoid | -- | Varies | This parameter displays the desired current draw of the turbocharger vane position control solenoid valve as calculated by the control module. The scan tool will display a high value if the solenoid is commanded open, and a lower value when the solenoid is commanded closed. | ||||||||||||||||
DPF Accumulation Status | -- | 0-5 | This parameter displays the state of the particulate matter accumulation. The higher the number, the more matter has accumulated as calculated by the control module based on input from the DPF differential pressure sensor. 0 indicates no accumulation, and 5 indicates Max accumulation, resulting in a regeneration. | ||||||||||||||||
DPF Incomplete Regeneration Status | -- | 0-2 | This parameter indicates an error status in the DPF regeneration. 0, 1, or 2 indicates the frequency of incomplete DPF regeneration, when the regeneration did not complete within the calibrated time. 0 indicates no errors, and 2 indicates high frequency of errors, setting a DTC. | ||||||||||||||||
DPF Insufficient Regeneration Status | -- | 0-2 | This parameter indicates an error status in the DPF regeneration. 0, 1, or 2 indicates the frequency of insufficient DPF regeneration, resulting in high soot in the filter after regeneration. 0 indicates no errors, and 2 indicates high frequency of errors, setting a DTC. | ||||||||||||||||
DPF Manual Regeneration Time | -- | 0 seconds | This parameter indicates the amount of time that the manual regeneration has been activated. A higher value indicates more manual regeneration time has elapsed. | ||||||||||||||||
DPF Mode Status | -- | 30 | This parameter displays a number corresponding to the following messages:
| ||||||||||||||||
DPF Regeneration Switch | -- | OFF | This parameter indicates the status of the manual regeneration switch. ON indicates the manual regeneration switch has been activated during the current key cycle. OFF indicates the manual regeneration switch has not been activated. | ||||||||||||||||
DPF Trip Status | -- | 0-4 | This parameter displays the state of the distance since last regeneration. It indicates the accumulated distance since the last successful regeneration. The value increases as mileage increases. | ||||||||||||||||
DTC Set This Ignition | -- | No | This parameter displays if a DTC set during the current ignition cycle. | ||||||||||||||||
ECT Sensor | -- | 85-105°C/185-220°F | 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. | ||||||||||||||||
EGR Cooler Temp. Sensor 1 | -- | Varies | This parameter will display the exhaust temperature entering the EGR Cooler. The EGR Temp Sensor 1 temperature will be warmer than the EGR Temp Sensor 2. | ||||||||||||||||
EGR Cooler Temp. Sensor 2 | -- | Varies | This parameter will display the exhaust temperature exiting the EGR Cooler. The EGR Temp Sensor 2 temperature will be cooler than the EGR Temp Sensor 1. | ||||||||||||||||
EGR Position Sensor | -- | 22-28% | This parameter displays EGR valve position as calculated by the control module based on an input from the EGR valve position sensor. The scan tool will display a lower value when the EGR valve is closed, and a higher value when the EGR valve is open. | ||||||||||||||||
EGR Solenoid Command | -- | 3-15% | This parameter displays the duty cycle commanded by the control module for the EGR valve. The scan tool will display a high percentage when the EGR valve is commanded open. The scan tool will display a low percentage when the EGR valve is commanded closed. | ||||||||||||||||
EGT Sensor 1 | -- | Varies | This parameter will display the exhaust temperature before the DPF. When the exhaust temperature is low, the scan tool will display a low temperature. When the exhaust temperature is high, the scan tool will display a high temperature. | ||||||||||||||||
EGT Sensor 2 | -- | Varies | This parameter will display the exhaust temperature after the DPF. When the exhaust temperature is low, the scan tool will display a low temperature. When the exhaust temperature is high, the scan tool will display a high temperature. | ||||||||||||||||
Engine Coolant Level | -- | OK | This parameter indicates the status of the engine coolant level as reported by the coolant level switch to the control module. OK indicates the coolant level is normal and the switch is closed. Low indicates the coolant is not normal and the switch is open. | ||||||||||||||||
Engine Power Relay | -- | ON | This parameter indicates the status of the Engine Power Relay. This parameter will display ON if the relay is being commanded by the control module, and OFF if the relay is not energized. | ||||||||||||||||
Engine Load | -- | 25% | 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 Level | -- | OK | This parameter displays the status of the engine oil level switch as determined by the control module. The control module uses this information to turn on the low engine oil lamp if the engine oil level remains approximately 1 quart low for a sufficient amount of time. The scan tool will display Low when the engine oil level is low. The scan tool will display OK when the engine oil level is correct. | ||||||||||||||||
Engine Oil Life Remaining | -- | Varies | This parameter displays the amount engine oil life remaining before requiring an oil change based on calculations by the control module. The scan tool will display lower values as the engine oil life approaches 0 miles. | ||||||||||||||||
Engine Oil Pressure Sensor | -- | Varies | This parameter displays the voltage sent to the control module from the engine oil pressure (EOP) sensor. | ||||||||||||||||
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 | -- | 680 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. | ||||||||||||||||
Exhaust Brake Switch | -- | OFF | This parameter displays the input status of the exhaust brake switch to the control module. The scan tool will display ON or OFF. ON indicates the exhaust brake switch is closing the exhaust brake request circuit to the control module. OFF indicates the exhaust brake switch is open. | ||||||||||||||||
Exhaust Brake Relay Command | -- | OFF | This parameter indicates the commanded state of the exhaust brake relay. ON indicates the relay is commanded ON. The parameter indicates OFF when the relay is commanded OFF. | ||||||||||||||||
Exhaust Brake Throttle Command | -- | OFF | This parameter indicates the commanded state of the exhaust brake throttle assembly. ON indicates the exhaust brake is commanded ON, while OFF indicates the exhaust brake is commanded OFF. | ||||||||||||||||
Final Fuel Rate | -- | Varies | This parameter indicates the overall quantity of fuel per injection event. This includes all injection pulses per cylinder event. The value is higher the more fuel is being used. | ||||||||||||||||
FRP Regulator Command | -- | 35-40% | This parameter displays the fuel rail pressure regulator duty cycle as commanded by the control module. The scan tool will display a lower value for a higher commanded fuel pressure, and a higher value for a lower commanded fuel pressure. | ||||||||||||||||
FRP Regulator Fuel Flow | -- | Varies | This parameter displays the fuel flow through the fuel pressure regulator as calculated by the control module based on engine speed, engine load, fuel pressure regulator current, and fuel pressure sensor inputs. The scan tool will display higher values at higher engine speeds and loads, and lower values at idle. | ||||||||||||||||
Fuel Level Sensor Rear Tank | -- | Varies | This parameter displays the voltage from the sensor used to monitor the fuel level inside the fuel tank. The scan tool will display a low voltage reading when that the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full. | ||||||||||||||||
Fuel Level To Cluster | -- | Varies | This parameter indicates the fuel quantity sent to the IPC by the control module based on calculations from the fuel level sensors. | ||||||||||||||||
Fuel Rail Pressure Sensor | -- | Varies | This parameter displays the voltage signal sent to the control module from the sensor used to measure the fuel rail pressure. The scan tool will display a low voltage at idle and high voltage when pressure demands are high. | ||||||||||||||||
Fuel Rate Correction | -- | Varies | This parameter indicates the total fuel rate correction per cylinder event. | ||||||||||||||||
Fuel Rate at Start | -- | Varies | This parameter indicates the initial Fuel quantity at startup, before an fuel adjustments have been performed. | ||||||||||||||||
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 Temperature Sensor | -- | Varies | This parameter displays the current fuel temperature as calculated by the control module based on input from the fuel temperature sensor. The scan tool will display a higher value at higher fuel temperatures. The scan tool will display a lower value at lower fuel temperatures. | ||||||||||||||||
Glow Plug Command | -- | OFF | This parameter displays the voltage supply to the glow plugs as measured by the control module. The scan tool will display a higher value at high voltages, or a lower value at lower voltages. | ||||||||||||||||
Glow Plug Lamp Command | -- | OFF | This parameter displays the commanded state of the glow plug lamp control circuit. The glow plug lamp should be ON when the scan tool indicates the lamp command is ON. The glow plug lamp should be OFF when the scan tool indicates the lamp command is OFF. | ||||||||||||||||
High Idle Switch | -- | OFF | This parameter displays the state of the high idle request input to the control module from the high idle switch. The scan tool will display ON or OFF. ON indicates the control module is receiving a request from the high idle switch to increase engine speed. OFF indicates the control module is not receiving a request from the high idle switch to increase engine speed. | ||||||||||||||||
IAF Valve Desired Position | -- | Varies | This parameter indicates the desired position of the intake airflow valve, as calculated by the control module. | ||||||||||||||||
IAF Valve Learned Closed Position | -- | 1% | This parameter displays the learned value of the intake air flow valve. This value will be displayed in percent. | ||||||||||||||||
IAF Valve Learned Open Position | -- | Varies | This parameter indicates the learned position of the intake airflow valve after the open position learn sequence by the control module. | ||||||||||||||||
IAF Valve Position | -- | 100% | This parameter displays the actual position of the intake air flow valve. | ||||||||||||||||
IAT Sensor 1 | -- | Varies | This parameter displays the temperature of the air entering the engine as calculated by the control module based on the input from the intake air temperature (IAT) sensor. The scan tool will display a low value when the air temperature is low, and a high value when the air temperature is high. | ||||||||||||||||
IAT Sensor 2 | -- | Varies | This parameter displays the temperature of the air entering the engine as calculated by the control module based on the input from the intake air temperature (IAT) sensor 2. The scan tool will display a low value when the air temperature is low, and a high value when the air temperature is high. | ||||||||||||||||
Ignition 1 Signal | -- | Battery Voltage | 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. The scan tool will display a low value when the voltage is low. The scan tool will display a high value, such as battery voltage, when the voltage is higher. | ||||||||||||||||
Ignition Switch | -- | ON | This parameter indicates the current status of the ignition switch as calculated by the control module based in switch power mode inputs. | ||||||||||||||||
Injector 1-6 Command | -- | Varies | This parameter indicates the injector pulse width commanded by the control module. The pulse width will be larger if a cylinder is not contributing proper power, and the pulse width will be short if the control module calculates that cylinder has too much fuel. | ||||||||||||||||
Intake Throttle Solenoid | -- | Varies | This parameter indicates the status of the intake throttle solenoid as commanded by the control module. | ||||||||||||||||
MAF Sensor | Engine Idling | 9-20 g/s | This parameter indicates the quantity calculated by the control module based on a signal from the MAF sensor. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds. | ||||||||||||||||
Engine speed at 2,500 RPM | 20-40 g/s | ||||||||||||||||||
MAF Sensor | -- | Varies | This parameter indicates the voltage signal received from the MAF sensor by the control module. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds. | ||||||||||||||||
Main Injection Timing | -- | Varies | Indicates the current timing of the main injection pulse as calculated by the control module. The scan tool will display a higher value for a main injection event farther from top dead center (TDC). The scan tool will display a lower value for a main injection event closer to TDC. | ||||||||||||||||
MIL Command | -- | OFF | This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit. The MIL should be ON when the scan tool indicates the MIL Command is ON. The MIL 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. | ||||||||||||||||
Mileage Since MIL Request | -- | Varies | This parameter displays the mileage accumulated since MIL was commanded ON by the engine control module. The scan tool will display increasing mileage as the vehicle is driven. | ||||||||||||||||
Particulate Filter Pressure Variance | -- | Varies | This parameter will display the pressure differential between the front and rear pressures at the DPF as calculated by the control module. This will be displayed in kPa. As the DPF becomes restricted, the differential pressure will increase. | ||||||||||||||||
Pilot Injection Fuel Rate | -- | Varies | This parameter displays the amount of fuel in the pilot injection pulse as calculated by the control module. The scan tool will display a higher value for a higher calculated fuel rate. The scan tool will display a lower value for a lower calculated fuel rate. | ||||||||||||||||
PNP Switch | -- | P/N | This parameter indicates the range selection of the automatic transmission as calculated by the control module based on input from the PNP switch. The scan tool will display, In Gear, Park, or Neutral depending on the PNP switch position. | ||||||||||||||||
Post Injection Fuel Rate | -- | Varies | This parameter indicates the quantity of fuel used in each post injection event. A higher value indicates more fuel, and a lower value indicates less fuel. | ||||||||||||||||
Pre-Injection Fuel Rate | -- | Varies | This parameter indicates the quantity of fuel used in each pre- injection event. A higher value indicates more fuel, and a lower value indicates less fuel. | ||||||||||||||||
PTO Brake/Clutch Override Switch | -- | OFF | This parameter indicates the status of the PTO Brake/Clutch override switch. OFF indicates that the brake or clutch pedal are released. ON indicates the brake OR clutch pedal has been depressed. | ||||||||||||||||
PTO Cab Control Disable Switch | -- | OFF | This parameter indicates the status of the PTO Cab Control Disable Switch. | ||||||||||||||||
PTO Enable | -- | No | This parameter indicates all parameters have been met to enable the power take off (PTO), and the control module has determined that the PTO is engaged. | ||||||||||||||||
PTO Engage Relay Command | -- | OFF | This parameter displays the commanded state of the PTO relay control circuit. The scan tool will display ON or OFF. ON indicates the PTO relay control circuit is being grounded by the control module, allowing voltage to the load engage switch. OFF indicates the PTO relay is not being commanded ON by the control module. | ||||||||||||||||
PTO Engine Shutdown | -- | No | This parameter displays the input status of the PTO engine shutdown switch to the control module. The scan tool will display YES or NO. Yes indicates the PTO engine shutdown switch is closed, grounding the engine shut-off signal circuit to the control module. OFF indicates the engine shut-off switch is open, allowing normal engine and PTO operation. | ||||||||||||||||
PTO Idle Speed | -- | Varies | This parameter indicates the PTO idle speed programming into the control module | ||||||||||||||||
PTO Feedback Signal | -- | Relay OFF | This parameter indicates the status of the PTO Relay based on feedback from the relay to the control module. Relay OFF indicates the control module is not receiving feedback voltage from the PTO relay. Relay ON indicates the control module is receiving a voltage signal from the relay. | ||||||||||||||||
PTO Mode | -- | Varies | This parameter displays a number to represent the mode. | ||||||||||||||||
PTO Remote Throttle Sensor | -- | Varies | This parameter indicates the voltage sent from the PTO remote sensor the control module. | ||||||||||||||||
Remote PTO Set Switch | -- | OFF | This parameter displays the status of the remote PTO set switch. ON indicates the switch has been activated, while OFF indicates the switch has not been activated. | ||||||||||||||||
Remote PTO Resume Switch | -- | OFF | This parameter displays the status of the remote PTO resume switch. ON indicates the switch has been activated, while OFF indicates the switch has not been activated. | ||||||||||||||||
Remote Switch Set A Switch | -- | OFF | This parameter displays the status of the remote set A switch. ON indicates the switch has been activated, while OFF indicates the switch has not been activated. | ||||||||||||||||
Remote Switch Set B Switch | -- | OFF | This parameter displays the status of the remote set B switch. ON indicates the switch has been activated, while OFF indicates the switch has not been activated. | ||||||||||||||||
Reverse Switch | -- | No | This parameter displays the gear selection of the manual transmission as calculated by the control module based on input from the Reverse switch. The scan tool will display YES if the reverse switch is closed. The scan tool will display NO if the reverse switch is open. | ||||||||||||||||
Start Up ECT | -- | Varies | This parameter Indicates the engine coolant temperature at engine start-up as calculated by the control module based on the signal from the ECT sensor. The scan tool will display a higher value on a warmer engine, and a lower value on a colder engine. | ||||||||||||||||
Starter Relay Command | -- | ON | The scan tool displays ON/OFF. The scan tool displays OFF until the ignition is placed into the Crank position, then it reads ON. | ||||||||||||||||
Stoplamp Pedal Switch | -- | Released | This parameter displays the state of the brake pedal as determined by the stoplamp pedal switch. This switch turns on the stoplamps when the brake pedal is depressed. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed. | ||||||||||||||||
Supply Pump Adjustment | -- | Varies | This parameter displays the supply pump current adjustment. | ||||||||||||||||
Supply Pump Status | -- | Learned | This parameter displays the supply pump position learn status. The scan tool will display one of the following:
| ||||||||||||||||
TC Vane Learned Open Position | -- | Varies | This parameter displays the learned position in counts. | ||||||||||||||||
TC Vane Pos. Ctrl. Solenoid | -- | Varies | This parameter displays the current draw of the vane position control solenoid through the control module. The scan tool will display a high current draw when the turbocharger vanes are being commanded closed. The scan tool will display a lower current draw when the turbocharger vanes are being commanded open. | ||||||||||||||||
TC Vane Position Learn Status | -- | Yes | This parameter indicates the status of the control module in learning the turbocharger vane position. The scan tool will display No if the turbocharger vane position has not been learned since the last DTC clear. | ||||||||||||||||
TC Vane Position Sensor | -- | Varies | This parameter displays the current commanded state of the turbocharger vane position control solenoid valve by the control module. The scan tool will display a higher value as the solenoid is commanded open. The scan tool will display a lower value as the solenoid is commanded closed. | ||||||||||||||||
TC Vane Position Sensor | -- | Varies | This parameter displays the voltage signal sent to the control module from the sensor. The scan tool will display a higher value as the solenoid is commanded open. The scan tool will display a lower value as the solenoid is commanded closed. | ||||||||||||||||
TCC/Cruise Brake Pedal Switch | -- | Released | This parameter displays the state of the brake pedal as determined by the control module. The control module monitors the pedal switch on the brake pedal for vehicles equipped with an automatic transmission. The control module uses this information to release the torque convertor clutch when the brake pedal is applied. The scan tool will display Applied when the brake pedal is depressed. the scan tool will display Released when the brake pedal is not applied. | ||||||||||||||||
Two Speed Axle Switch | Axle in Low Gear | Low Gear | This parameter indicates the two speed axle gear based on the switch input to the control module. | ||||||||||||||||
Axle in High Gear | High Gear | ||||||||||||||||||
Vehicle Speed Sensor | -- | 0 km/mi | 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. | ||||||||||||||||
Parameter | Description |
|---|---|
Cylinder Power Balance | Disables each fuel injector. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool. |
Dash Lamps and Gages | Malfunction Indicator Lamp--Activates the malfunction indicator lamp (MIL). The MIL will remain illuminated until cancelled by the scan tool. |
DPF Regeneration Enable | This function enables a DPF Regen when the vehicle meets the conditions for running. This function will by-pass the normal soot model, so the next time the vehicle is under the conditions for an active regeneration to take place, the control module will go ahead and initiate the regeneration event. |
DPF Reset Replace DPF | Resets all DPF parameters to zero. |
DPF Service Regeneration | This function enables a DPF Regen. The engine coolant must be greater than 70-115°C (158-239°F). Vehicle must be in Park. Ambient temperature must be greater than -30°C (-22°F). Brake pedal and accelerator must be in the released position. The scan tool will display all inhibit reasons. The scan tool must remain connected until test is complete. This function takes approximately 35 minutes to complete. During this procedure the RPM will slowly increase to 2,500 RPM and remain there for approximately 25 minutes. |
EGR Solenoid | Activates the exhaust gas recirculation (EGR) solenoid ON or OFF. The EGR position is limited to 40 percent duty cycle, which is 100 percent commanded open valve. The device control is limited to 10 seconds ON, with a 10 second OFF cooling time. This device control is disabled by DTC P0403. |
Exhaust Brake Control | Activates the Exhaust Brake ON or OFF. |
Glow Plug | Activates the glow plugs ON of OFF. |
PTO Relay | Activates the PTO relay ON or OFF. |
TC Vane Position Sensor | Adjusts the turbocharger vane position in 5 percent increments from 0-100 percent. The device control will be aborted if engine speed is above idle or if the coolant temperature is too cold. |
