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