Part 2

Scan Tool Data Definitions - Continued

IAT Sensor
- This parameter displays the temperature of the air entering the air induction system based on input to the control module from the intake air temperature (IAT) sensor.

Ignition Off Time
- 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.

Ignition 0 Signal
- This parameter displays On when the control module detects a voltage at the ignition 0 input terminal.

Ignition 1 Signal
- 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 1 Signal
- This parameter displays On when the control module detects a voltage at the ignition 1 input terminal.

IMRC Solenoid Circuit Status
- This parameter displays the state of the intake manifold runner control (IMRC) control circuit. The parameter displays Fault if the IMRC control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON.

IMRC Solenoid Command
- This parameter displays the control modules commanded state of the IMRC solenoid.

Int. Brake Apply Signal
- This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).

Injector 1-6 Command
- This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module.

Injector 1-6 Disabled Due to Misfire
- 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
- This parameter displays the actual intake camshaft position in degrees.

Int. CMP Bank 1 or Bank 2 Active Counter
- This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor.

Int. CMP Angle Bank 1 or 2 Variance
- This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position.

Int. CMP Bank 1 or 2 Command
- This parameter displays the intake camshaft position in percent of range as commanded by the control module.

Int. CMP Solenoid Bn. 1 or 2 Circuit Status
- This parameter displays the state of the intake camshaft actuator solenoid control circuit. The parameter displays Fault if the camshaft actuator solenoid control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the circuit has been commanded ON. This parameter may not change if the scan tool is used to command the CMP solenoid ON.

Knock Detected Cyl. 1-6
- 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
- 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.

KS 1 or 2 Signal
- This parameters displays the voltage input to the control module from the knock sensor (KS).

Long Term FT Bank 1 or Bank 2
- This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT is used for the long term correction of the fuel delivery. 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 Bn. 1 or 2 Sen. 1
- 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.

Loop Status Bn. 1 or 2 Sen. 2
- This parameter displays the state of the rear heated oxygen sensors as commanded by the control module. The rear sensors will not go into Closed Loop until the ECM determines that the HO2S is ready for operation.

LT FT Bn. 1 or Bn. 2 Cruise/Accel.
- This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for cruise and acceleration conditions.

LT FT Bn. 1 or Bn. 2 Idle/Decel.
- This parameter displays the commanded Long Term Fuel Trim correction by the control module for bank 1 or bank 2 for idle and deceleration conditions.

MAF Performance Test
- 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
- This parameter displays the measured quantity of air flowing into the engine during all operating conditions.

MAF Sensor
- This parameter displays the signal frequency from the mass air flow (MAF) sensor to the control module.

MIL Circuit Status
- This parameter displays the state of the MIL control circuit. The parameter displays Fault if the MIL control circuit is open, shorted to ground, or shorted to voltage. This parameter displays indeterminate until the circuit is commanded ON.

MIL Command
- This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module.

Mil Requested by DTC
- 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.

Mileage Since First Failure
- This parameter displays the mileage that has elapsed since the first emission failure.

Mileage Since Last Failure
- This parameter displays the mileage that has elapsed since the last emission failure.

Mileage Since MIL Requested
- This parameter displays the mileage that has elapsed since the control module has commanded the malfunction indicator lamp (MIL) On.

Misfire Current Cyl. 1-6
- The scan tool displays a range of 0-200 counts. This parameter displays the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.

Misfire History Cyl. 1-6
- The scan tool displays a range of 0-65,535 counts. The misfire history counters display the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire DTC P0300 has become active. The misfire history counters will update every 200 cylinder firing events.

Moderate Brake Apply Signal
- This parameter displays the state of the brake pedal that is transmitted over the serial data circuit from the electronic brake control module (EBCM).

PNP Switch
- This parameter displays whether the transmission range selector is in park or neutral.

Power Enrichment
- This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions.

Reduced Engine Power
- This parameter displays whether the control module is commanding reduced engine power due to a throttle actuator control (TAC) system condition.

RVS Disable 1-8 History
- This parameter displays one of the last eight reasons that powertrain has disabled remote vehicle start (RVS).

Short Term FT Bank 1 or Bank 2
- This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor 1 or 2. If the oxygen sensor indicates a lean air/fuel mixture, the control module will add fuel increasing the short term fuel trim above 0. If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce fuel decreasing the short term fuel trim below 0.

Spark
- This parameter displays the amount of spark advance the control module is commanding on the ignition control circuits. The control module determines the desired advance.

Starter Relay Circuit Status
- This parameter displays the state of the starter relay control circuit. The parameter displays Fault if the starter relay control circuit is open, shorted to ground, or shorted to voltage. The parameter displays Indeterminate until the relay control circuit has been commanded ON.
This parameter may not change if the scan tool is used to command the relay control circuit ON.

Starter Relay Command
- This parameter indicates whether the control module is commanding the starter relay to go on or off.

Start Up ECT
- This parameter displays the temperature of the engine coolant on start up based on input to the control module from the ECT sensor.

Start Up IAT
- This parameter displays the temperature of the intake air at start in the air induction system based on input to the control module from the IAT sensor.

Stop Lamp Pedal Switch
- This parameter displays the position of the stop lamp pedal switch input to the control module.

System Power Mode
- This parameter displays the position of the ignition switch.

TAC Forced Engine Shutdown
- This parameter indicates the status of throttle actuator control (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
- This parameter indicates the status of the throttle actuator control (TAC) motor driver by the engine control module (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 System Learned Counts
- This parameter displays the steps counted in learning the throttle actuator control parameters. The last step learned is 11.

TCC Status
- This parameter displays the commanded status of the torque convertor clutch.

TCM Requested Torque
- This parameter displays the calculated amount torque requested of the controller.

TCM Torque Increase
- This parameter displays whether or not the controller has responded to a request for a torque increase.

TCS Torque Increase
- This parameter displays whether or not the controller has responded to a request for a torque increase.

TCM Torque Reduction Active
- This parameter displays whether the transmission control module (TCM) is reducing torque.

TCS Torque Reduction Active
- This parameter displays whether EBTCM has determined a reduction in torque took place.

TCS Torque Delivered Signal
- This is the calculated torque output from the engine to the transmission used by the EBTCM for the traction control system operation.

TCS Torque Request Signal
- The EBTCM sends a Desired Torque Level signal request to the control module. This decreases torque from the powertrain in order to reduce wheel slip during acceleration for the traction control.

Total Fuel Trim Avg. Bank 1 or Bank 2
- This parameter displays the overall fuel trim from the idle/decel cell and the cruise/accel cell.

Total Knock Retard
- This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.

Total Misfire Count
- This parameter displays the total number of cylinder firing events that the control module detected as misfires for the last 200 crankshaft revolution sample period.

TP Desired Angle
- This parameter displays the desired TP angle commanded by the control module.

TP Indicated Angle
- This parameter displays the percent of throttle opening as calculated by the control module using information from the two TP sensors.

TP Performance Test
- This parameter displays the status of the throttle position (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
- This parameter displays the actual voltage on the TP sensor 1 signal circuit as measured by the control module.

TP Sensor 1 Learned Minimum
- This parameter displays the learned minimum value of throttle position (TP) sensor 1 as recorded by the control module during the last learn procedure.

TP Sensor 2
- This parameter displays the actual voltage on the TP sensor 2 signal circuit as measured by the control module.

TP Sensor 2 Learned Minimum
- This parameter displays the learned minimum value of TP sensor 2 as recorded by the control module during the last learn procedure.

TP Sensor 1 and 2
- This parameter displays Disagree when the control module detects that TP sensor 1 voltage signal is not within the correct relationship to TP sensor 2. The scan tool displays Agree under the normal operating conditions.

Traction Control Status
- This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control.

Vehicle Security Status
- This parameter displays the status of the vehicle theft deterrent system.

TWC Temperature Calculated
- This parameter displays the catalytic converter temperature as calculated by the control module.

Vehicle Speed Sensor
- This parameter displays the speed of the vehicle as calculated by the transmission control module (TCM) from information received from the vehicle speed sensor (VSS).

Volumetric Efficiency
- This parameter displays the calculated volumetric efficiency of the engine as calculated by the control module.

VTD Auto. Learn Timer
- 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
- This parameter indicates the VTD system has disabled fuel.

VTD Fuel Enabled
- This parameter indicates the VTD system has enabled fuel.

VTD Fuel Disable Until Ign. Off
- This parameter indicates the VTD system has disabled fuel for the remainder of the ignition cycle.

VTD Password learned
- 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.

Warm Ups Since DTC Cleared
- 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.

Wide Open Throttle
- 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%.