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 |
| Table 2: | Output Control |
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
| • | The Diagnostic System Check - Vehicle is completed. |
| • | No DTCs are set |
| • | The on-board diagnostics are functioning properly |
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The engine scan tool data list represents values that would be seen on a normally running engine.
Important: A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis.
Parameter | System State | Expected Value | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories OFF | |||||||||||
5-volt Reference 1 | -- | 5 Volts | This parameter displays the voltage sensed on the 5-volt reference 1 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage. | ||||||||
5-volt Reference 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 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 Request Signal | -- | NO | The scan tool displays YES/NO. The HVAC module receives an input request when the HVAC module is turned ON. | ||||||||
A/C Relay Command | -- | 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 Relay Ckt Short Gnd Test Status | -- | OK | This displays the status of the relay control circuit. It can display OK, Fault or Not Run. | ||||||||
A/C Relay Ckt Open Test Status | -- | OK | This displays the status of the relay control circuit. It can display OK, Fault or Not Run. | ||||||||
A/C Relay Ckt Short Volts Test Status | -- | Not Run | This displays the status of the relay control circuit. It can display OK, Fault or Not Run. | ||||||||
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 (72-319 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 (43-174 psi) | ||||||||||
A/C OFF for WOT | A/C ON | NO | The scan tool displays YES/NO. The state of the A/C request related to wide open throttle. | ||||||||
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, Stall Prevention, RPM Unstable, WOT, Launch Performance or Coolant Hot. The scan tool displays None if OK. | ||||||||
Air Flow Calculated | -- | 3-7 g/s | This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s). | ||||||||
Ambient Air Temperature | -- | Varies | Outside temperature at any given altitude expressed in degrees | ||||||||
APP Indicated Angle | Accelerator pedal not applied | 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 WOT | 100% | ||||||||||
APP Sensor | -- | Varies | This parameter displays the average of the 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 counts. | ||||||||
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% | This parameter displays the angle of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. | ||||||||
Accelerator pedal fully actuated | 100% | ||||||||||
APP Sensor 2 | Accelerator pedal not actuated | 0.3-0.5 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 fully actuated | 2.2-2.5 Volts | ||||||||||
APP Sensor 2 Indicated Position | Accelerator pedal not actuated | 0% | This parameter displays the angle of the APP sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed. | ||||||||
Accelerator pedal fully actuated | 100% | ||||||||||
APP 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. | ||||||||
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. | ||||||||
BPP Signal | -- | Released | This parameter displays the state of the brake pedal position switch as determined by the brake pedal switch. The scan tool will display Applied when the brake pedal is depressed, and Released when the brake pedal is not depressed. | ||||||||
BPP Circuit Signal | -- | Released | The BCM uses the Brake Pedal Position sensor as an indication that the brake pedal is applied or released. | ||||||||
Catalytic Converter Protection Active | -- | No | This parameter indicates the status of the control module control for catalytic converter protection. The scan tool will indicate YES if the control module is adjusting fuel and ignition quantity and timing to protect the catalytic converter from damage. The scan tool will indicate NO if the control module is in a normal fuel and ignition control mode. | ||||||||
Calc. TWC Temp. | -- | Varies | This parameter displays the catalytic converter temperature as calculated by the control module. | ||||||||
Calc. TWC Temp. Bank 1 and Bank 2 | -- | Varies | This parameter displays the catalytic converter temperature as calculated by the control module. | ||||||||
Change Engine Oil Indicator Command | -- | No | This parameter displays the state of the change engine oil lamp control circuit as commanded by the control module. | ||||||||
CKP Resync Counter | -- | Varies | This parameter displays the number of times the control module has to synchronize the CKP sensor. | ||||||||
CKP Sensor | -- | Engine Idle Speed | This parameter displays the engine speed as calculated by the control module using the signal from the CKP sensor. | ||||||||
CKP Active Counter | -- | Incrementing | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position (CKP) sensor. | ||||||||
Cmmd. 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. | ||||||||
CMP Sensor | -- | Engine Idle Speed | This parameter displays the engine speed as calculated by the control module using the signal from the CMP sensor. | ||||||||
Cold Startup | -- | Varies | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle. | ||||||||
Crank Request Signal | -- | No | This parameter 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 | None | 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 | -- | ON | 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 | -- | Invalid | 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 | -- | Invalid | 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. | ||||||||
Cruise Control Cancel Switch | -- | Off | This parameter displays the status of the cruise control cancel switch as determined by the control module. The scan tool will display On when the cruise control cancel switch is on. The scan tool will display Off when the cruise control cancel switch is off. | ||||||||
Cycles of Misfire Data | -- | Incrementing 0-100 | This parameter displays the number of cylinder firing events recorded by the control module | ||||||||
Cyl. 1-8 IC Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Cyl. 1-8 IC Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Cyl. 1-8 IC Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Cyl. 1-8 Inj. Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Cyl. 1-8 Inj. Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Cyl. 1-8 Inj. Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the ignition control circuits. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Decel. Fuel Cut-off | -- | 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 EGR Position | -- | 0% | 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 Exh CMP Bank 1 or 2 | -- | Varies in degrees | This parameter displays the desired exhaust camshaft position for Bank 1 or 2, as determined by the control module. The scan tool will display a higher value for more advanced exhaust valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced exhaust valve timing, such as at idle. | ||||||||
Desired Idle Speed | -- | 650-700 | 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 Int. CMP Bank 1 or 2 | -- | Varies in degrees | This parameter displays the desired exhaust camshaft position for Bank 1 or 2, as determined by the control module. The scan tool will display a higher value for more advanced intake valve timing, such as at high load or speed conditions. The scan tool will display a lower value for a less advanced intake valve timing, such as at idle. | ||||||||
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 First Failure | -- | Varies | This parameter displays the distance accumulated when the emission diagnostic trouble code first failed. | ||||||||
Distance Since Last Failure | -- | Varies | This parameter displays the distance accumulated when the emission diagnostic trouble code last failed. | ||||||||
Drag Control Status | -- | Inactive | Drop Throttle Control Mode is active when the Requested Torque Signal indicates greater than 90 percent duty cycle while the Traction Control System Data Control Signal input is active. | ||||||||
Drop Throttle Status | -- | Inactive | Drop Throttle Control Mode is active when the Requested Torque Signal indicates greater than 90 percent duty cycle while the Traction Control System Data Control Signal input is active. | ||||||||
EC Ignition Relay Ckt Short Gnd Test Status | -- | Not Run | This parameter displays the status of the output driver for the engine control (EC) Ignition Relay control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EC Ignition Relay Ckt Open Test Status | -- | Not Run | This parameter displays the status of the output driver for the engine control (EC) Ignition Relay control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EC Ignition Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the engine control (EC) Ignition Relay control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EC Ignition Relay Command | -- | ON | This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded ON by the control module. | ||||||||
EC Ignition Relay Feedback Signal | -- | Battery Voltage | This parameter displays the voltage signal sent to the control module from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF. | ||||||||
ECM Authentication Status | -- | Valid | This parameter indicates the result of the comparison between the last received immobilizer system response and the expected response calculated by the ECM. | ||||||||
ECM Challenge Status | -- | Invalid | This parameter shows the immobilizer system status of the ECM challenge. This indicates whether the currently calculated ECM challenge is valid. | ||||||||
ECM Response Source | -- | Normal | The parameter indicates the source used to calculate the ECM response. The sources include Normal Start, Remote Vehicle Start, PTO Remote Start. | ||||||||
ECT Sensor | -- | 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. | ||||||||
Engine Load | -- | 25-30% | This parameter displays the engine load in percent based on inputs to the control module from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load. | ||||||||
Engine OFF Time | -- | Varies | This parameter displays the time elapsed since the engine turned OFF. The scan tool will display the time in hours, minutes and seconds. The engine OFF time will reset to zero when the engine starts. | ||||||||
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 Temperature Calculated | -- | Varies °C/°F | This parameter displays the temperature of the engine oil as calculated by the control module using various sensor inputs. The engine oil temperature calculated has a range of values indicating a low value when the oil temperature is low to a high value when the oil temperature is high. | ||||||||
Engine Run Time | -- | Varies | This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running. | ||||||||
Engine Speed | -- | 650 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. | ||||||||
EPM Inhibit Reason | -- | None | 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 as determined by the control module. The scan tool will display various messages, depending on the result of the test. | ||||||||
EVAP Purge Solenoid Command | -- | 15% | 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 Purge Solenoid Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission purge solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EVAP Purge Solenoid Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission purge solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EVAP Purge Solenoid Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission purge solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EVAP Vent Solenoid Command | -- | Venting | This parameter displays the state of the EVAP vent solenoid commanded by the control module. The scan tool will display 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. | ||||||||
EVAP Vent Solenoid Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission vent solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EVAP Vent Solenoid Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission vent solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
EVAP Vent Solenoid Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the evaporative emission vent solenoid control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Angle Bank 1 or 2 | -- | 0 Degrees | This parameter displays the actual exhaust camshaft position in degrees. | ||||||||
Exh CMP Bank 1 or 2 Command | -- | 0 Degrees | This parameter displays the degrees of advanced exhaust camshaft angle related to crankshaft position as commanded by the control module. The scan tool will display a higher value for a more advanced exhaust camshaft position. The scan tool will display a lower value when the exhaust camshaft is not being advanced, such as at idle. | ||||||||
Exh CMP Bank 1 or 2 Variance | -- | 0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position. | ||||||||
Exh CMP Bank 1 or Bank 2 Active Counter | -- | Varies in counts | This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position (CMP) sensor. | ||||||||
Exh CMP Sol Bn 1 Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Sol Bn 1 Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Sol Bn 1 Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Sol Bn 2 Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Sol Bn 2 Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Exh CMP Sol Bn 2 Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Exh CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Ext. Travel BPP Signal | -- | Released | This parameter will display the state of the brake pedal, applied or released. | ||||||||
Fail Counter | -- | Varies Counts | This parameter displays the number of times a specific diagnostic has run and failed. | ||||||||
FC Relay 1 Ckt Short Gnd Test Status | -- | 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, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relay 1 Ckt Open Test Status | -- | 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, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relay 1 Ckt Short Volts Test Status | -- | Not Run | This parameter displays the diagnostic state of the output driver for the cooling fan relay 1 control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relay 1 Command | -- | Varies ON/OFF | This parameter displays the commanded state of the cooling fan relay 1 control circuit. The cooling fan relay 1 should be ON when the scan tool indicates the FC relay 1 command is ON. The cooling fan relay 1 should be OFF when the scan tool indicates the FC Relay 1 Command is OFF. | ||||||||
FC Relays 2 and 3 Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the cooling fan relays 2 and 3 control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relays 2 and 3 Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the cooling fan relays 2 and 3 control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relays 2 and 3 Ckt Short Volts Test Status | -- | Not Run | This parameter displays the diagnostic state of the output driver for the cooling fan relays 2 and 3 control circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
FC Relays 2 and 3 Command | -- | Varies ON/OFF | This parameter displays the commanded state of the cooling fan relays 2 and 3 control circuit. The cooling fan relays 2 and 3 should be ON when the scan tool indicates the FC Relay 2 and 3 command is ON. The cooling fan relays 2 and 3 should be OFF when the scan tool indicates the FC Relay 2 and 3 command is OFF. | ||||||||
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 Left or Right Tank | -- | 0-5 Volts | This parameter displays the voltage signal received by the control module from the fuel level sensors. | ||||||||
Fuel Pump Relay Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the Fuel Pump Relay circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Fuel Pump Relay Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the Fuel Pump Relay circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Fuel Pump Relay Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the Fuel Pump Relay circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
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 Pump Relay Circuit Status | -- | OK/Incomplete | This parameter displays the diagnostic state of the output driver for the Fuel Pump Relay control circuit. The scan tool will display OK if the circuit is operating correctly. The scan tool will display the appropriate fault if there is an open, short to ground or a short to voltage on the circuit. | ||||||||
Fuel Tank Level Remaining | -- | Varies | This parameter displays the amount of fuel remaining in the fuel tank as measured in percentage. The control module determines the amount of fuel remaining in the tank by using information from the fuel level sensors. The scan tool will display a higher value with a full fuel tank, and a lower value with an empty fuel tank. | ||||||||
Fuel Tank Pressure Sensor | -- | 1.5 Volts | This parameter displays the voltage signal sent to the control module from the sensor used to monitor the pressure inside the fuel tank. 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 or in a vacuum. | ||||||||
Fuel Tank Pressure Sensor | -- | 0 inches H2O (0 mm Hg) | This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high. | ||||||||
Fuel Tank Rated Capacity | -- | 17.5-20 gals (66.24-75.7 liter) | 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. See Owner's Manual-Capacities and Specifications. | ||||||||
Fuel Trim Cell | -- | Varies | This parameter displays the fuel trim cell number as calculated by the control module based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load. | ||||||||
Fuel Trim Learn | -- | Enabled | This parameter indicated if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled. | ||||||||
Fuel Trim System Test State | -- | Monitoring | This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test. | ||||||||
Fuel Volatility | -- | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low. | ||||||||
GEN 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 Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the Gen- L Terminal circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
GEN L-Terminal Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the Gen- L Terminal circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
GEN L-Terminal Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the Gen- L Terminal circuit. The scan tool will display OK, Fault or Not Run. 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. | ||||||||
HO2S Bank 1 or 2 Sensor 1 | -- | 80-850 mV | This parameter indicates the heated oxygen sensor (HO2S) bank 1 or bank 2, sensor 1 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. | ||||||||
HO2S Bank 1 or 2 Sensor 1 Heater | -- | 0.60-0.80 amps | This parameter displays the current through the control module when the bank 1 or bank 2, sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bank 1 Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low. | ||||||||
HO2S Bn 1 or 2 Sen 1 Heater Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 or Bank 2 Senor 1. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 or 2 Sen 1 Heater Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 or Bank 2 Senor 1. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 or 2 Sen 1 Heater Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 or Bank 2 Senor 1. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 or 2 Sen 1 Heater Command | -- | 0-99% | This parameter displays the commanded state of the Bank 1 or Bank 2 Sensor 1 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON. | ||||||||
HO2S Bn 1 or 2 Sen 1 Heater Command | -- | ON | This parameter displays the commanded state of the Bank 1 or Bank 2 Sensor 1 heater by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF. | ||||||||
HO2S Bank 1 or 2 Sensor 2 | -- | 80-850 mV | This parameter indicates the heated oxygen sensor (HO2S) bank 1 sensor 2 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. | ||||||||
HO2S Bank 1 or 2 Sensor 2 Heater | 0.60-0.80 amps | This parameter displays the current through the control module when the bank 1 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bank 1 Sensor 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 Bn 1 Sen 2 Heater Ckt Short Gnd Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 Sen. 2. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 Sen 2 Heater Ckt Open Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 Sen. 2. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 Sen 2 Heater Ckt Short Volts Test Status | -- | OK | This parameter displays the status of the output driver for the HO2S Heater Bank 1 Sen. 2. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
HO2S Bn 1 or 2 Sen 2 Heater Command | -- | 0-99% | This parameter displays the commanded state of the Bank 1 Sensor 2 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON. | ||||||||
HO2S Bn 1 or 2 Sen 2 Heater Command | -- | ON | This parameter displays the commanded state of the Bank 1 Sensor 2 heater by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF. | ||||||||
Hot Open Loop | -- | Inactive | This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally. | ||||||||
IAT Sensor | 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 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 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. | ||||||||
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 OFF Time | -- | Varies | This parameter displays the time elapsed since the ignition was last turned OFF. The scan tool will display the time in hours, minutes and seconds. The ignition OFF time will reset to zero when the ignition is turned ON. | ||||||||
Injector PWM Bank 1 or Bank 2 | -- | 2.0-5.4 ms | This parameter indicates the average commanded ON time for each injector on Bank 1 or Bank 2 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders. | ||||||||
Injector 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. | ||||||||
Int. CMP Angle Bank 1 or 2 | -- | 0 Degrees | This parameter displays the degrees of advanced intake camshaft angle related to crankshaft position as determined by the control module based on input from the intake CMP sensors. The scan tool will display a higher value for a more advanced intake camshaft position. The scan tool will display a lower value when the intake camshaft is not being advanced, such as at idle. | ||||||||
Int. CMP Bank 1 or 2 Command | -- | 0 Degrees | This parameter displays the degrees of advanced intake camshaft angle related to crankshaft position as commanded by the control module. The scan tool will display a higher value for a more advanced intake camshaft position. The scan tool will display a lower value when the intake camshaft is not being advanced, such as at idle. | ||||||||
Int. CMP Bank 1 or 2 Variance | -- | 0 Degrees | This parameter indicates the difference between the actual camshaft angle and the commanded camshaft angle as determined by the control module. The scan tool will display a higher value for larger differences, or a lower value if there is only a small difference. | ||||||||
Int. CMP Bank 1 or 2 Active Counter | -- | Varies in counts | This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor. | ||||||||
Int CMP Sol Bn 1 Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Int CMP Sol Bn 1 Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Int CMP Sol Bn 1 Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 1 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Int CMP Sol Bn 2 Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Int CMP Sol Bn 2 Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Int CMP Sol Bn 2 Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Int CMP solenoid Bn 2 control circuit as determined by the control module. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Intake Manifold Pressure | -- | 70-75 kPa | This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or low 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 | This parameter indicates the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensors. The scan tool displays a high value for a large amount of spark retard, and a low value for a small amount of spark retard. | ||||||||
Long Term FT Bank 1 or Bank 2 | -- | 0% ± 10% | 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 or bank 2. The scan tool will a high value for a large amount of long term fuel correction, and 0 percent for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. | ||||||||
LT FT Test Avg. Bank 1 or Bank 2 | -- | 1% | This parameter is calculated by the control module based on an intrusive test by the control module. The Long Term FT test average used for the long term correction of the fuel delivery in each bank. The scan tool will a high value for a large amount of long term fuel correction, and 0 percent for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. | ||||||||
LT FT Avg. Bank 1 or Bank 2 w/o Purge | -- | 1% | This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will display a high value for a large amount of long term fuel correction, and 0 percent for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. | ||||||||
Loop Status | -- | Closed | This parameter displays the state of the fuel control system as commanded by the control module. Closed Loop operation indicates that the control module is controlling the fuel delivery based off the oxygen sensors input signal. In Open Loop operation the control module ignores the oxygen sensor input signal and bases the amount of fuel to be delivered on other sensor inputs. | ||||||||
Low EOP Indicator Command | -- | OFF |
| ||||||||
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 | Engine Idling | 3.4-6.5 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 | 11.88 g/s | ||||||||||
MAF Sensor | -- | 1510-3224 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 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 | -- | 30-38 kPa | This parameter indicates the manifold absolute pressure inside the engine as calculated by the control module based on the signal from the MAP sensor. The scan tool will display a higher value wide open throttle, and a lower value at idle. | ||||||||
MAP Sensor | -- | 0.75-1.40 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. | ||||||||
MIL Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the malfunction indicator lamp control (MIL) circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
MIL Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the malfunction indicator lamp control (MIL) circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
MIL Ckt Short Volts Test Status | -- | Not Run | This parameter displays the diagnostic state of the output driver for the malfunction indicator lamp control (MIL) circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
MIL Command | -- | OFF | This parameter displays the commanded state of the MIL control circuit. The MIL should be ON when the scan tool indicates the MIL Command is ON. The malfunction indicator lamp should be OFF when the scan tool indicates the MIL Command is OFF. The control module will command the MIL ON when the ignition is ON with the engine OFF in order to perform a bulb check. | ||||||||
MIL Requested by DTC | -- | NO | This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs. | ||||||||
Misfire Current Cyl. 1-8 | -- | 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 History Cyl. 1-8 | -- | 0 | This parameter displays the number of possible misfires that have occurred after 195 current misfires have been counted 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. | ||||||||
Not Run Counter | -- | Varies | This parameter displays the number of ignition cycles that a DTC has not run. The scan tool display will increment as the number of ignition cycles increase without a DTC pass or Fail. | ||||||||
Pass Counter | -- | Counts | The scan tool displays the number of times a DTC has run and passed. | ||||||||
PNP Switch | -- | P/N | This parameter indicates the range selection of the automatic transmission as calculated by the control module based on input from the PNP switch. The scan tool will display, In Gear, Park, or Neutral depending on the PNP switch position. | ||||||||
Power Enrichment | -- | Inactive | This parameter indicates if the control module has detected conditions appropriate to operate in Power Enrichment mode. The scan tool will display Active if the mode is in operation, and Inactive if the mode is not in operation. The control module enters Open Loop operation and increases injector pulse width when in power enrichment mode. | ||||||||
Reduced Engine Power | -- | Inactive | This parameter indicates if the control module has detected that a TAC system fault has occurred. The scan tool will display Active if the mode is in operation, and Inactive if the mode is not in operation. The control module limits engine power when this mode is Active. | ||||||||
Reverse Inhibit Command | -- | OFF | This parameter displays the commanded state of the reverse inhibit solenoid control circuit. The reverse inhibit solenoid should be ON when the scan tool indicates the Reverse Inhibit Solenoid Command is ON. The reverse inhibit solenoid should be OFF when the scan tool indicates the Reverse Inhibit Solenoid Command is OFF. | ||||||||
Reverse Inhibit Solenoid Command | -- | OFF | This parameter displays the commanded state of the reverse inhibit solenoid control circuit. The reverse inhibit solenoid should be ON when the scan tool indicates the Reverse Inhibit Solenoid Command is ON. The reverse inhibit solenoid should be OFF when the scan tool indicates the Reverse Inhibit Solenoid Command is OFF. | ||||||||
Rev. Inhibit Solenoid Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Reverse Inhibit Solenoid circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Rev. Inhibit Solenoid Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Reverse Inhibit Solenoid circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Rev. Inhibit Solenoid Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the output driver for the Reverse Inhibit Solenoid circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
RVS Disable 1-8 History | -- | None | This parameter displays one of the last eight reasons that powertrain has disabled remote vehicle start (RVS). | ||||||||
RVS Request Signal | -- | ON/OFF | This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode. | ||||||||
Short Term FT Bank 1 or Bank 2 | -- | 0% ± 10% | This parameter displays the short term correction to fuel delivery for bank 1 or bank 2 by the control module in response to the amount of time the oxygen sensor voltage spends above or below the 450 mV threshold. The scan tool will display 0 percent if no adjustments are required. The scan tool will display a higher positive value if fuel has to be added, and a higher negative value if fuel has to be removed. | ||||||||
Spark | -- | 9-11° | This parameter displays the spark timing being commanded by the control module ON the IC circuit. The scan tool will display a negative value if the spark timing is before top dead center (BTDC) or spark advance; the scan tool will display a positive value if the spark timing is after top dead center (ATDC) or spark retard. Because the ignition control module sets spark advance at a fixed value BTDC while operating in bypass mode, the displayed spark advance only reflects true spark timing when the PCM has commanded IC mode. | ||||||||
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 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. | ||||||||
ST FT Test Avg. Bank 1 or Bank 2 | -- | 1% | This parameter is calculated by the control module based on an intrusive test by the control module. The Short Term FT Test Average used for the short term correction of the fuel delivery in each bank. The scan tool will display a high value for a large amount of short term fuel correction, and 0% for no short term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event. | ||||||||
Starter Relay Ckt Short Gnd Test Status | -- | OK | The scan tool displays OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Starter Relay Ckt Open Test Status | -- | OK | The scan tool displays OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Starter Relay Ckt Short Volts Test Status | -- | Not Run | The scan tool displays OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
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. | ||||||||
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. | ||||||||
TCS and Drop Throttle Status | -- | Inactive | TCS Active and Drop Throttle Control Mode is active when the Requested Torque Signal is within the TCS region, 40-90 percent duty cycle, while the Traction Control System Data Control Signal input is Active. | ||||||||
TCS Torque Request Signal | -- | 3 N·m (2 lbs ft) | This parameter indicates the percentage of available torque requested from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque. | ||||||||
TCS Torque Request Signal | -- | 100% | This parameter indicates the torque requested from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque. | ||||||||
TCS Torque Delivered Signal | -- | 1% | This parameter indicates the torque delivered from the engine to the transmission as calculated by the control module. The scan tool will display a higher value for higher torque, and a lower value for lower torque. | ||||||||
TFT Sensor | -- | Varies °C/°F |
| ||||||||
Torque Management Spark Retard | -- | 0° | This parameter indicates how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving. | ||||||||
Total Knock Retard | -- | 0° | 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 | This parameter displays the number of possible misfires during the last 200 cylinder firing events detected on all cylinders as calculated by the control module. The misfires are calculated based on engine crankshaft rotation speed variations. The scan tool displays an incrementing counter. | ||||||||
TP Desired Angle | -- | 2-6% | This parameter indicates the desired throttle angle calculated by the TAC module as commanded by the vehicle operator. The scan tool will display a higher value when the accelerator pedal is depressed, and a lower value as the accelerator pedal is released. | ||||||||
TP Indicated Angle | -- | 2-6% | This parameter displays the angle of the throttle plate as calculated by the control module using the signals from the throttle position (TP) sensors. The TP indicated angle is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is wide open. | ||||||||
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 | -- | 4.1-4.5 Volts | This parameter displays the voltage signal sent to the control module from TP sensor 1 of the throttle assembly. The TP sensor 1 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. | ||||||||
TP Sensor 1 Indicated Position | -- | 2% | This parameter displays the angle of the throttle position (TP) sensor 1 as calculated by the control module using the signal from the TP sensor 1. The TP sensor 1 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open. | ||||||||
TP Sensors 1 and 2 | -- | Agree | This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2. The scan tool will display Agree or Disagree. Agree indicates that TP sensor 1 and TP sensor 2 voltages correspond to the same throttle position. Disagree indicates that TP sensor 1 and TP sensor 2 voltages correspond to different throttle positions. | ||||||||
TP Sensor 2 | -- | 0.5-0.8 Volts | This parameter displays the voltage signal sent to the control module from TP sensor 2 of the throttle assembly. The TP sensor 2 is a range of values indicating a low voltage when the throttle is closed to a high voltage when the throttle plate is fully open. | ||||||||
TP Sensor 2 Indicated Position | -- | 2% | This parameter displays the angle of the TP sensor 2 as calculated by the control module using the signal from the TP sensor 2. The TP sensor 2 is a range of values indicating a low percentage when the throttle is closed to a high percentage when the throttle is fully open. | ||||||||
Torque Delivered Signal | -- | N·m (lbs ft) Varies |
| ||||||||
Traction Control Status | -- | Inactive | This parameter indicates the status of the traction control system as reported by the control module. The scan tool will display ACTIVE if the traction control system is taking action to reduce drive wheel slippage. The scan tool will display INACTIVE if the traction control system is not being required to take action to reduce drive wheel slippage. | ||||||||
Vehicle Speed Ckt Short Volts Test Status | -- | OK | This parameter displays the diagnostic state of the Vehicle Speed Sensor circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Vehicle Speed Ckt Open Test Status | -- | OK | This parameter displays the diagnostic state of the Vehicle Speed Sensor circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
Vehicle Speed Ckt Short Gnd Test Status | -- | OK | This parameter displays the diagnostic state of the Vehicle Speed Sensor circuit. The scan tool will display OK, Fault or Not Run. The scan tool will display OK if the circuit is operating correctly. | ||||||||
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 Counter | -- | Counts | The scan tool displays the count value when using the 30-minute reprogramming procedure. Three 10-minute cycles, or three counts, are required to complete the 30-minute auto learn reprogramming procedure. | ||||||||
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. | ||||||||
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 | -- | Yes | This parameter indicates the VTD system has enabled fuel. | ||||||||
VTD Password Learn Enabled | -- | No | The scan tool will display Yes when a valid theft password has been learned. | ||||||||
VTD Password Learned | -- | No | 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 | -- | 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 | 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 | -- | Varies | 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 | -- | Varies | 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. | ||||||||
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%. | ||||||||
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. | ||||||
CMP Actuator | This function controls the camshaft actuator Ssolenoid. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 25 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
CMP Actuator Solenoid | This function controls the camshaft actuator. The normal commanded state is NONE. The system will increase or decrease the angle of the camshaft in 5 degree increments up to 20 crankshaft degrees. The engine must be OFF. | ||||||
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. | ||||||
Dash Lamps | Malfunction Indicator Lamp--Controls the malfunction indicator lamp (MIL). The commanded states include NONE, ON, and OFF. When commanded ON or OFF, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Engine Controls Ignition Relay | This function activates the engine control (EC) ignition relay. The normal commanded state is NONE. When commanded ON or OFF, the engine control module (ECM) turns the relay ON or OFF. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Engine Speed Control | Activates the idle air control (IAC) valve 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 engine speed. The SET STEP VALUE changes the engine speed by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the tool. | ||||||
EVAP Purge Solenoid | Activates the EVAP Purge Valve. The normal commanded state is NONE. The system will INCREASE or DECREASE the amount of EVAP purge valve opening by 10 percent increments within a range of 0-100 percent. The system remains in the commanded state until cancelled by the tool or the fuel tank pressure exceeds 24 mm Hg (12 in H2O). | ||||||
EVAP Service Test | Activates the on-board EVAP diagnostic test. | ||||||
EVAP Vent Solenoid | Activates the EVAP vent solenoid. The normal commanded state is NONE. When commanded ON, the vent valve switches to non-venting. The system remains in the commanded state unless one of the following conditions occurs:
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EVAP Purge/Seal | This control enables 2 functions. One function increases or decreases the amount of purge by changing the duty cycle of the purge valve and commanding the vent ON (non-venting). The normal commanded state of both valves is NONE. The system will INCREASE or DECREASE the amount of EVAP purge valve opening by 10 percent increments within a range of 0-100 percent. The second function seals the system after using the purge function to obtain a specific amount of fuel tank pressure (FTP). When activated the purge valve is commanded to 0 percent and the vent valve is commanded ON (non-venting). Both functions remain in the commanded state until cancelled by the tool or the FTP exceeds 24 mm Hg (12 in H2O). | ||||||
Exhaust CMP Actuator Bank 1 | This function controls the exhaust camshaft actuator for bank 1. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 25 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exhaust CMP Actuator Bank 2 | This function controls the exhaust camshaft actuator for bank 2. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 25 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exhaust CMP Actuator Sol. Bank 1 | This function controls the exhaust camshaft actuator solenoid for bank 1. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Exhaust CMP Actuator Sol. Bank 2 | This function controls the exhaust camshaft actuator solenoid for bank 2. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fan Relay 1 | Commands the low speed fan relay ON and OFF. Both cooling fans will activate on low speed | ||||||
Fan Relays 2 and 3 | Commands the series parallel and high speed fan relays ON and OFF. The driver side fan will be OFF. The passenger side fan will activate on high speed. | ||||||
Fan Relays 1, 2 and 3 | Commands the low speed fan , high speed fan, and series parallel relays ON and OFF. Both fans will activate on 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 | Controls the fuel pump relay. The normal commanded state is NONE. When commanded ON/OFF, the PCM turns the fuel pump ON/OFF. If the engine is running, and the fuel pump is commanded OFF, the engine will stall. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Enable | Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Reset | Activates the reset of fuel trim data in all fuel trim cells. | ||||||
GEN L-Terminal | The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage. | ||||||
HO2S Heater Bank 1 Sensor 1 Command | Activates the HO2S bank 1 sensor 1 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 1 sensor 1 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
HO2S Heater Bank 1 Sensor 2 Command | Activates the HO2S bank 1 sensor 2 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 1 sensor 2 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
HO2S Heater Bank 2 Sensor 1 Command | Activates the HO2S bank 2 sensor 1 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 2 sensor 1 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
HO2S Heater Learn | his output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine OFF time, typically 12 or more hours. | ||||||
Idle Spark | Disables and enables idle spark advance with the engine running. | ||||||
Intake CMP Actuator Bank 1 | This function controls the intake camshaft actuator for bank 1. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 20 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Intake CMP Actuator Bank 2 | This function controls the intake camshaft actuator for bank 2. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 20 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Intake CMP Actuator Sol. Bank 1 | This function controls the intake camshaft actuator solenoid for bank 1. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
Intake CMP Actuator Sol. Bank 2 | This function controls the intake camshaft actuator solenoid for bank 2. The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the camshaft actuator solenoid ON/OFF. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. | ||||||
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 | Controls the malfunction indicator lamp (MIL). The commanded states include NONE, ON, and OFF. When commanded ON or OFF, the system remains in the commanded state 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. | ||||||
Reverse Inhibit | This device control is used to override the state of the Reverse Inhibit output. | ||||||
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 normal commanded state is NONE. The system will INCREASE or DECREASE the amount of spark retard by 1 degree increments within a range of 0-10 degrees maximum retard. The system remains in the commanded state until cancelled by the tool. | ||||||
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 | This function opens the throttle plate in 10 percent increments. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. |
