Vehicle Diagnostic Information - Specifications - All Systems

Body Control Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Engine ON
Accy/RAP Relay Command	On	The scan tool displays On or Off. This is the commanded state of the RAP relay. The scan tool displays ON when the BCM provides voltage to the RAP relay control circuit.
All Door Lock Cmd.	Off	The scan tool displays On or Off. This is the Lock output from the body control module (BCM) to all door lock actuators. When either door lock switch is operated to the Lock position the parameter is displayed as ON.
Ambient Light Sensor	Varies	This displays Volts. This is the current voltage at the ambient light sensor.
Ambient Light Status	Varies	The scan tool displays Night, Day, Unknown or Invalid. This is the state of the ambient light sensor.
Auto Hdlp. Disable Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the auto headlamp disable switch.
Backup Lamps	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the backup lamps are turned ON.
Batt. Low at Start	No	The scan tool displays Yes or No. Yes is displayed if the state of the battery charge is low during cranking.
Batt. Open Ckt. Tested	No	The scan tool displays Yes or No.
Batt. Open Ckt. Voltage	Varies	This displays Volts. This is the voltage input to the BCM and is compared to the battery high resolution voltage for determining RVC charging voltage.
Batt. Voltage High Res.	Varies	This displays Volts. This is the voltage measured on a discreet high resolution voltage sense circuit to the BCM.
Battery Current	Varies	This displays amps. This parameter displays the information sent to the BCM from the battery current sensor to be used for determining RVC charging voltage.
Battery Sulfation Mode	Inactive	The scan tool displays Active or Inactive. The BCM will enter this mode when the interpreted generator output voltage is less than 13.2 volts for 45 minutes. In this mode the BCM will set a targeted output voltage of 13.8 volts for 5 minutes.
Battery Voltage	Varies	This displays Volts. This parameter displays the amount of battery voltage available to the body control module (BCM).
Battery Voltage	Normal	This displays Normal or Out of Range. This is the current state of the system voltage.
BPP Sensor	Varies	This displays Counts. This numeric value is the current brake pedal position.
BPP Sensor Reference	Varies	This displays Counts. This numeric value is the BPP sensor reference.
BPPS High During Learn	No	The scan tool displays Yes or No. If a short to battery positive voltage is detected in the stop lamp switch signal circuit during calibration, then the scan tool will display YES.
BPPS Learned Home Position	Varies	This displays Counts. This numeric value is the BPP sensor learned home position.
BPPS Low During Learn	No	The scan tool displays Yes or No. If a short to ground is detected in the stop lamp switch signal circuit during calibration, then the scan tool will display YES.
BPPS Move During Learn	No	The scan tool displays Yes or No. If the brake pedal is moved during calibration, the scan tool will display YES.
BPPS Status	Learned	The scan tool displays Invalid, Learned and Invalid, Undecided, Learning and Learned. This is the state of the BPPS calibration in the BCM.
Brake Applied Output Signal	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the brake pedal is applied.
BTSI Fault	Not Present	The scan tool displays Present or Not Present. Present is displayed if the BCM senses a brake transmission shift interlock (BTSI) fault.
Calculated Brake Pedal Position	Varies	This displays Counts. This numeric value is the current brake pedal position.
Content Theft Mode	Varies	The scan tool displays True or False. This is the mode of the content theft system.
Courtesy Lamp PWM Cmd.	Varies	This displays percent. This is the current dimming percentage of the courtesy lamps.
Crank Abort	False	The scan tool displays True or False. This is the state of the crank abort.
Cruise Control Switch	Off	The scan tool displays Off, On, Resume, Set, Error or Cancel. This is the state of the cruise control switch as monitored by the body control module (BCM).
CTD Status	Disarmed	The scan tool displays Disarmed, Armed, Arm Delay or Alarm Active. The scan tool displays the current arming status of the content theft system.
CTD Trigger History 1-3	None	The scan tool displays None, Drvr. Door, Psgr. Door, LR Door, RR Door, Rear Closure, Mid Closure, Tonneau, Hood, Ignition, Intrusion, Inclination, Remote, Batt. Reconnect, Power Mode, Tamper, or Glass Break. The scan tool displays the input which previously caused a content theft alarm.
Ctsy. Lamp Actv. Reason	Varies	The scan tool displays Off, Panic, Manual, Air Bag, Door Open, RFA, RFA Theft, Door Closed, Exit or Manual Defeat. This is the reason for courtesy lamp activation.
Current CTD Trigger	None	The scan tool displays None, Drvr. Door, Psgr. Door, LR Door, RR Door, Rear Closure, Mid Closure, Tonneau, Hood, Ignition, Intrusion, Inclination, Remote, Batt. Reconnect, Power Mode, Tamper, or Glass Break. The scan tool displays the current input which has cause a content theft alarm.
Current Power Mode	Run	The scan tool displays Off, Accessory, Run or Crank Request. This parameter displays the power mode defined by the power mode master and communicated to the modules that require this information. This parameter should match the actual ignition switch position.
Desired Battery Voltage	Varies	This displays Volts. This is the desired battery voltage.
Dimming Control Reference	Varies	This displays Volts. This is the dimming control reference voltage.
Dimming Control Signal	Varies	This displays percent. This is the dimming control percentage.
Dimming Control Signal	Varies	This displays Volts. This is the dimming control signal voltage.
Door Key Cyl. Unlock Switch	Inactive	This displays Active or Inactive. The scan tool displays the current status of the door key cylinder unlock switch.
Door Lock Requestor	Varies	The scan tool displays Power Lock, Door Key Cyl., Rear Closure, Emergency, Keyless Entry, Passive Keyless, Remote, Delayed Lock, Relocking, Anti-Lockout, Exterior Sw. or Auto Locks. This is the current state of the door lock request as monitored by the BCM.
Driver Door Ajar Sw.	Door Closed	The scan tool displays Door Ajar or Door Closed. When the driver door is open or latched and not completely closed, the scan tool will display Door Ajar.
Driver Door Lock Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the driver door lock switch.
Driver Door Open Sw.	Closed	The scan tool displays Open or Closed. When the driver door is open, the scan tool will display Open.
Driver Door Unlock Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the driver door unlock switch.
Driver Identification	Varies	The scan tool displays Unknown or Driver 1-7. The scan tool displays the driver which has disarmed the content theft system.
DRL Relay Command	On	The scan tool displays On or Off. This output of the BCM is displayed as ON when the BCM turns ON the DRL lamps.
Drvr. Door Unlock Cmd.	Off	The scan tool displays On or Off. This is the state of the driver door unlock system.
Drvr. 1 RVS Status	Off	The scan tool displays On or Off. On is displayed if driver 1 has performed a remote vehicle start request.
Drvr. 2 RVS Status	Off	The scan tool displays On or Off. On is displayed if driver 2 has performed a remote vehicle start request.
Estimated Battery Temp.	Varies	This displays °C (°F). This is the current estimated battery temperature.
Flash to Pass Switch	Inactive	The scan tool displays Active or Inactive. When the multifunction switch is placed on the FTP position, the scan tool will display Active.
Front Fog Lamp Relay Command	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the fog lamps are turned ON.
Front Fog Lamp Switch	Inactive	The scan tool displays Active or Inactive. When the fog lamp switch is placed in the ON position, the scan tool will display Active.
Fuel Economy Mode	Active	The scan tool displays Active or Inactive. This is the state of the fuel economy mode.
Hazard Lamp Switch	Inactive	The scan tool displays Active or Inactive. When the hazard switch is placed in the ON position, the scan tool will display Active.
Headlamp Switch	Inactive	The scan tool displays Active or Inactive. This is the state of the headlamp switch.
High Beam Relay Command	Off	The scan tool displays On or Off. This is the state of the high beam relay.
High Beam Select Switch	Inactive	The scan tool displays Active or Inactive. When the headlamp dimmer switch is placed in the HIGH position, the scan tool will display Active.
Hood Ajar Switch	Closed	The scan tool displays Ajar or Closed. When the hood is open or latched and not completely closed, the scan tool will display Ajar.
Hood Closed Switch	Active	The scan tool displays Active or Inactive. The scan tool displays the status of the hood closed portion of the hood ajar switch.
Hood Open Switch	Inactive	The scan tool displays Active or Inactive. The scan tool displays the status of the hood open portion of the hood ajar switch.
Hood Switch Fault	Not Present	The scan tool displays Present or Not Present. Present is displayed if the BCM senses a hood switch fault.
Horn Relay Command	Off	The scan tool displays On or Off. The horn output indicates the state that the control module has commanded for the relay.
HS Comm. Cmd.	Off	The scan tool displays On or Off. The scan tool displays the commanded state of the serial data communication enable circuit output. The scan tool displays ON when the BCM provides voltage to the circuit.
Idle Boost Level 2 Counter	Varies	This numeric value is the number of level 2 idle boosts requested by the RVC system to maintain proper battery charging at idle.
Idle Boost Level 3 Counter	Varies	This numeric value is the number of level 3 idle boosts requested by the RVC system to maintain proper battery charging at idle.
Ign. Off/Run/Crank	Run	The scan tool displays Key In/Off, Key Out/ACC, Crank or Run. The BCM uses this data input signal from the off/run/crank voltage circuits in order to determine the power mode (ignition switch position).
Ignition Accessory/Run	Active	The scan tool displays Active or Inactive. The BCM uses this data input signal from the accessory voltage circuits in order to determine the power mode (ignition switch position). Active is displayed when the ignition switch is in the Accy or Run positions.
Ignition Run/Crank	Active	The scan tool displays Active or Inactive. The BCM uses this data input signal from the ignition 1 voltage circuits in order to determine the power mode (ignition switch position). Active is displayed when the ignition switch is in the Run or Crank positions.
Ignition Switch Fault	No	The scan tool displays Yes or No. Yes is displayed if the BCM senses an ignition switch fault.
Incandescent Dimming PWM Cmd.	Varies	This displays percent. This is the current incandescent dimming percentage.
Int. Trunk/Liftglass Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the interior trunk or liftglass release switch.
Key Capture Solenoid Cmd.	Off	The scan tool displays On or Off. This is the state of the key capture solenoid.
Key in Ignition	Yes	The scan tool displays Yes or No. This is the state of the key in ignition.
Key in Ignition Status	Key In	The scan tool displays Key In or Key Out. The scan tool displays the ignition key in/out status.
LED Dimming PWM Cmd.	Varies	This displays percent. This is the current LED dimming percentage.
Left Rear Door Ajar Sw.	Door Closed	The scan tool displays Door Closed or Door Ajar. When the left rear door is open or latched and not completely closed, the scan tool will display Door Ajar.
Left Turn Signal Switch	Inactive	The scan tool displays Active or Inactive. When the turn signal switch is placed in the LEFT turn position, the scan tool will display Active.
LF Turn Signal	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the left turn signal is turned ON.
Load Shed Lvl 2 Counter	Varies	This numeric value is the number of level 2 load sheds requested by the RVC system to maintain proper battery charging at idle.
Load Shed Lvl 3 Counter	Varies	This numeric value is the number of level 3 load sheds requested by the RVC system to maintain proper battery charging at idle.
Low Beam Relay Command	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the low beam headlamps are turned ON.
LR Turn Signal	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the left turn signal is turned ON or when the brakes are applied.
Off/Run/Crank Reference	Varies	This displays volts. This is the current off/run/crank reference voltage.
Off/Run/Crank Signal	Varies	This displays volts. This is the current off/run/crank signal voltage.
Parasitic Current	Varies	This displays amps. This is the state of the parasitic draw on the battery.
Park Brake Switch	Released	The scan tool displays Applied or Released. When the park brake is applied, the scan tool will display Applied.
Park Lamp Relay Cmd.	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the park lamps are turned ON.
Parklamp Switch	Off	The scan tool displays On or Off. When the headlamp switch is in the PARK position, the scan tool will display ON.
Passenger Door Ajar Sw.	Door Closed	The scan tool displays Door Closed or Door Ajar. When the front passenger door is open or latched and not completely closed, the scan tool will display Door Ajar.
Passenger Door Open Sw.	Closed	The scan tool displays Open or Closed. When any passenger door other than the drivers door is open, the scan tool will display Open.
Powertrain HS Comm. Cmd.	Off	The scan tool displays On or Off. The scan tool displays the commanded state of the accessory wake up serial data circuit output. The scan tool displays ON when the BCM provides voltage to the circuit. This voltage output acts as a wake up signal for the powertrain control module(s).
Prev. State of Charge	Varies	The scan tool displays 0-100%. The scan tool displays the state of charge from the previous ignition off cycle.
Psgr. Door Lock Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the passenger door lock switch.
Psgr. Door Unlock Sw.	Inactive	The scan tool displays Active or Inactive. This is the state of the passenger door unlock switch.
Psgr. Door(s) Unlock Cmd.	Off	The scan tool displays On or Off. This is the state of the passenger doors unlock system.
Rear Closure Ajar Sw.	Inactive	The scan tool displays Active or Inactive. When the rear compartment is open or latched and not completely closed, the scan tool will display Active.
Regulator Setpoint	Varies	This displays percent. This is the set point of the voltage regulator as determined by the RVC system.
Remaining Starts 0	Varies	The scan tool displays True or False. True is displayed if there are no remaining starts.
Remote Start Attempts 0	Varies	The scan tool displays True or False. True is displayed if there are no remote start attempts.
RF Turn Signal	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the right turn signal is turned ON.
Right Rear Door Ajar Sw.	Door Closed	The scan tool displays Door Closed or Door Ajar. When the right rear door is open or latched and not completely closed, the scan tool will display Door Ajar.
Right Turn Signal Switch	Inactive	The scan tool displays Active or Inactive. When the turn signal switch is placed in the RIGHT turn position, the scan tool will display Active.
RR Turn Signal	Off	The scan tool displays On or Off. This output of the BCM is displayed as ON when the right turn signal is turned ON or when the brakes are applied.
Run/Crank Relay Command	Off	The scan tool displays On or Off. The scan tool displays the commanded state of the run/crank relay. The scan tool displays ON when the BCM provides voltage to the run/crank relay control circuit.
Run Abort	False	The scan tool displays True or False. True is displayed if a run abort was executed.
Shift Lock Solenoid Command	Off	The scan tool displays On or Off. This is the state of the shift lock solenoid.
Start Up State of Charge	Varies	The scan tool displays 1-100%. The scan tool displays the state of charge at initial ignition ON cycle.
State of Charge	Varies	The scan tool displays 0-100%. The scan tool displays the present state of charge.
State of Charge Low	No	The scan tool displays YES/NO. The scan tool displays YES if the present state of charge is low.
Stop Lamp Relay Command	Off	The scan tool displays On or Off. This is the state of the stop lamp relay.
SWC Bank 1 Status	Idle	The scan tool displays Idle or Switch 1-10. This is the state of the steering wheel controls (SWC) bank 1.
Theft LED	Off	The scan tool displays On, Off, Flash Slow or Flash Fast. The scan tool displays the current status of the theft indicator as controlled by the CTD system.
Traction Control Switch	Inactive	The scan tool displays Active or Inactive. This is the state of the traction control switch.
Trunk Release Solenoid Command	Off	The scan tool displays On or Off.
Valet Switch	Inactive	The scan tool displays Active or Inactive. This is the state of the valet switch.
Washer Relay Cmd.	Off	The scan tool displays On or Off. When the windshield washer system is active, the scan tool displays the BCM the commanded output state of the windshield washer relay as On.
Windshield Washer Switch	Inactive	The scan tool displays Active or Inactive. When the washer switch is pressed, the scan tool displays the switch input to the BCM as Active. The BCM then commands the wiper relay ON and keeps it ON until 2 wipe cycles have completed after the switch has been released.
Windshield Wiper Switch	Off	The scan tool displays Off, Intermittent, Low, High or Switch Fault. When the windshield wiper system is active, the scan tool will display Intermittent or Low as selected. The scan tool will display Switch Fault if the BCM senses an invalid wiper switch input.
Wiper Delay Setting	Varies	This displays a numeric value. The scan tool displays 0/1-5. When the wiper switch is in the Delay mode, the scan tool will display the wiper switch delay position 1-5 as selected.
Wiper High Speed Relay Cmd.	Off	The scan tool displays On or Off. When the wiper system is in the active state, the scan tool displays the BCM commanded output to the wiper high relay as On.
Wiper High Speed Switch	Inactive	The scan tool displays Active or Inactive. When the wiper switch is in the high speed position, this parameter displays the switch input to the BCM as Active.
Wiper Park Switch	Inactive	The scan tool displays Active or Inactive. The body control module (BCM) uses this input to determine the position of the wipers. When the wipers are in the PARK or down position, the wiper motor park switch signal circuit of the BCM is pulled low and the scan tool will display Active.
Wiper Relay Cmd.	Off	The scan tool displays On or Off. When the windshield wiper system is active, the scan tool displays the BCM commanded output state of the wiper relay as On.

Body Control Module Scan Tool Data Parameters

Scan Tool Output Control	Description
Accy/RAP Relay	This output control is used to command the Accy/RAP relay On and Off.
Backup Lamps	This output control is used to command the backup lamps On and Off.
BPP Sensor Calibration	This output control is used to command the BCM to calibrate the brake pedal position (BPP) sensor to zero.
Courtesy Lamp	This output control is used to command the foot wells and courtesy lamps On and Off.
Driver Door Unlock	The BCM momentarily pulses only the driver door lock motor. The driver door should unlock when ON is selected.
DRL	This output control is used to command the daytime running lamps On and Off.
Fog Lamps	This output control is used to command the fog lamps On and Off.
High Beams	This output control is used to command the high beam headlights On and Off.
Horn	This output control is used to command the horn On and Off.
Incandescent Dimming	The BCM dims the incandescent dimming from 0-100 percent when you select INCREASE or DECREASE by 20 percent increments.
LED Dimming	The BCM dims the LED dimming from 0-100 percent when you select INCREASE or DECREASE by 20 percent increments.
LF Turn Signal	This output control is used to command the left front turn signal On and Off.
Lock Rear Doors	This output control is used to command the rear doors to lock.
Low Beams	This output control is used to command the low beam headlights On and Off.
LR Turn Signal	This output control is used to command the left rear turn signal On and Off.
Parking Lamps	This output control is used to command the parking lamps On and Off.
RF Turn Signal	This output control is used to command the right front turn signal On and Off.
RR Turn Signal	This output control is used to command the right rear turn signal On and Off.
Run/Crank Relay	This output control is used to command the run/crank relay On and Off.
Setup SDM Primary Key in BCM	This output control is used to set up the SDM primary key into the BCM.
Shift Lock Solenoid	This output control is used to command the shift lock solenoid On and Off.
Trunk Release	This output control is used to command the trunk release solenoid On and Off.
Unlock Rear Doors	This output control is used to command the rear doors to unlock.
Wiper High Speed Relay	This output control is used to command the wiper high speed relay On and Off.
Wiper Relay	This output control is used to command the wiper relay On and Off.
Wiper Washer Motor	This output control is used to command the wiper washer motor On and Off.

Body Control Module Scan Tool Output Controls

Communication Interface Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions : Ignition ON
Date	Numeric	This displays DD/MM/YYYY. This is the date the VCIM was manufactured.
GPS Signal	Yes	The scan tool displays Yes or No. Yes is displayed if there is a GPS signal received by the VCIM.
Signal Strength	68	The scan tool displays 0-100. This displays a calculated value for cellular reception signal strength. A higher number indicates a stronger signal.
Signal Type	Digital	The scan tool displays Digital or Analog. This is the signal type received by the VCIM.
Time	Numeric	The scan tool displays HH:MM:SS. This displays the time as synchronized with GPS Satellites.
Transceiver ID	Varies	The scan tool displays a 2-5 digit value. This displays the ID number of the cellular tower that the OnStar® VCIM is using for cellular signal.

Vehicle Communication Interface Module Scan Tool Data Parameters

Scan Tool Output Control	Description
B1000 Data	This shows the data recorded when DTC B1000 was set in the VCIM.
Green LED	The VCIM illuminates the green LED on the inside rearview mirror when ON is selected.
Phone Call Test	When ON is selected, VCIM commands OnStar to connect to the OnStar Center.
PRL Update	This function performs an update of the Preferred Roamer List. Provides a list of alternate networks to use when the service provider's and/or subscriber's primary wireless network cannot be reached.
Red LED	The VCIM illuminates the red LED on the inside rearview mirror when ON is selected.

Vehicle Communication Interface Module Scan Tool Output Controls

Digital Radio Receiver Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Ignition ON/Engine OFF/Radio ON
Battery Voltage	Varies	This displays volts. This is the voltage input supplied to the digital radio receiver.
Ignition Counter	Varies	This displays the number of times the ignition has been cycled from the OFF to ON position.
Power Mode	Run	The scan tool displays Reserved, Off Battery Save, Off Asleep, Off Awake, Unlock, RAP Unlock, Accessory, Run, Crank, or RAP. The status of the vehicle power mode (ignition switch).

Digital Radio Receiver Scan Tool Data Parameters

Driver Seat and Passenger Seat Heater Control Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Ignition ON
Driver Seat Heat Status	Inactive	The scan tool displays Active or Inactive. Active is displayed when the module commands seat heating ON.
Driver Seat HVC Level	Varies	The scan tool displays High, Medium or Low. This is the current level of seat heating as requested by the heated seat switch.
Driver Seat HVC Mode	Varies	The scan tool displays Off, Back & Cushion, Back Only, or Cool. This is the current mode of operation for the driver seat.
Passenger Seat Heat Status	Inactive	The scan tool displays Active or Inactive. Active is displayed when the module commands seat heating ON.
Passenger Seat HVC Level	Varies	The scan tool displays High, Medium or Low. This is the current level of seat heating as requested by the heated seat switch.
Passenger Seat HVC Mode	Varies	The scan tool displays Off, Back & Cushion, Back Only, or Cool. This is the current mode of operation for the passenger seat.
Seat Heat Supply Voltage	Inactive	The scan tool displays Active or Inactive. Active is displayed when the module commands seat heating ON.

Heated Seat Module Scan Tool Data Parameters

Electronic Brake Control Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Ignition ON
ABS Active	No	The scan tool displays Yes or No. The scan tool displays Yes if the ABS system is performing antilock braking.
ABS Failed	No	The scan tool displays Yes or No. Yes is displayed if there is an ABS fault.
Battery Voltage Signal	Varies	This displays volts. This is the voltage supplied to the EBCM.
Brake Fluid Level Status	OK	The scan tool displays OK or Low. This is the state of the brake fluid level sensor.
Brake Pressure Sensor Input	Varies	The scan tool displays 0-5 Volts. This voltage signal indicates the master cylinder hydraulic pressure applied to the system
BPP Signal	Released	The scan tool displays Applied or Released. The scan tool displays the applied state of the brake pedal position sensor.
Delivered Torque	0%	The scan tool displays 0-100%. The duty cycle of the signal is used to transmit how much engine torque the ECM is delivering. Normal values are between 10-90 percent duty cycle. The signal is at low values (approximately 10 percent) at idle and at higher values under driving conditions.
DRP Active	No	The scan tool displays Yes or No. The scan tool displays if the EBCM is performing dynamic rear proportioning.
DRP Disabled	No	The scan tool displays Yes or No. The scan tool displays if the EBCM is no longer able to perform dynamic rear proportioning.
Engine Drag Control Failed	No	The scan tool displays Yes or No. Indicates if the EBCM disabled engine drag control due to a malfunction.
Lateral Accelerometer Input	0.0 m/s 2	The scan tool displays m/s 2 . This is the current rate of the vehicle acceleration or deceleration as reported by the lateral accelerometer sensor.
LF Wheel Speed Sensor	0 km/h (0 mph)	This displays km/h (mph). This is the current speed of the left front wheel speed sensor.
LF Inlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the left front inlet valve solenoid is commanded on.
LF Outlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the left front outlet valve solenoid is commanded on.
LR Wheel Speed Sensor	0 km/h (0 mph)	This displays km/h (mph). This is the current speed of the left rear wheel speed sensor.
LR Inlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the left rear inlet valve solenoid is commanded on.
LR Outlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the left rear outlet valve solenoid is commanded on.
Panic Brake Assist Failed	No	The scan tool displays Yes or No. Indicates if the EBCM disabled Panic Brake Assist due to a malfunction.
Pump Motor Command Voltage	Varies	This displays Volts. The scan tool displays the voltage applied to the ABS pump motor.
Requested Torque	0%	The scan tool displays 0-100%. The duty cycle of the signal is used to transmit how much torque the EBCM is requesting the ECM to deliver. Normal values are between 10-90 percent duty cycle. The signal should be at 90 percent duty cycle when traction control is not active and at lower values (approximately 10 percent) when traction control is active.
RF Inlet Solenoid	Off	The scan tool displays On or Off. On is displayed when the right front inlet valve solenoid is commanded on.
RF Outlet Solenoid	Off	The scan tool displays On or Off. On is displayed when the right front outlet valve solenoid is commanded on.
RF Wheel Speed Sensor	0 km/h (0 mph)	This displays km/h (mph). This is the current speed of the right front wheel speed sensor.
RR Inlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the right rear inlet valve solenoid is commanded on.
RR Outlet Solenoid Command	Off	The scan tool displays On or Off. On is displayed when the right rear outlet valve solenoid is commanded on.
RR Wheel Speed Sensor	0 km/h (0 mph)	This displays km/h (mph). This is the current speed of the right rear wheel speed sensor.
Steering Position Sensor Signal	Varies	This displays degrees. This is the signal received from the steering angle sensor.
TCS Active	No	The scan tool displays Yes or No. The scan tool displays if the EBCM is requesting torque reduction from the ECM.
TCS Failed	No	The scan tool displays Yes or No. The scan tool displays if the EBCM is no longer able to perform traction control.
VSES Active	No	The scan tool displays Yes or No. The scan tool displays Yes when VSES is active, and No when VSES is inactive.
VSES Failed	No	The scan tool will display Yes or No depending on the state of the ABS indicator.
Yaw Rate Sensor Input	0.0 °/sec	The scan tool displays the signal received from the yaw rate sensor.

Electronic Brake Control Module Scan Tool Data Parameters

Scan Tool Output Control	Description
Automated Bleed	This is used in order to bleed ABS hydraulics. Refer to Antilock Brake System Automated Bleed .
Steering Angle Sensor Centering	This is used to center the steering angle sensor.

Electronic Brake Control Module Scan Tool Output Controls

Engine Control Module Scan Tool Information (3.5L)

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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) is completed.
No diagnostic trouble codes (DTCs)
On-board diagnostics are functioning properly

The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.

IMPORTANT

A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.

Only the parameters listed below are referenced in this service manual for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.

Parameter	System State	Expected Value	Description
Base Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released
5-Volt Reference 1		5.0 Volts	This parameter displays the voltage sensed on the 5-volt reference 1 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage.
5-Volt Reference 1 Circuit Status		OK	This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
5-Volt Reference 2		5.0 Volts	This parameter displays the voltage sensed on the 5-volt reference 2 circuit at the control module. The scan tool will display a higher value at higher voltage. The scan tool will display a lower value at lower voltage.
5-Volt Reference 2 Circuit Status		OK	This parameter will display OK if the circuit is good or Fault if a short to ground, short to B+ or open circuit is present.
A/C Disengage 1-8 History		Varies	This parameter indicates the reason the A/C compressor was disengaged. The reasons displayed are: None, A/C Pressure, Eng Spd, Batt Voltage, Stall Prevention, RPM Unstable, WOT, Launch Perf, Coolant Hot.
A/C High Side Pressure		1.43 Volts Varies	The scan tool displays 0-5 volts. This is the output of the A/C refrigerant pressure sensor.
A/C High Side Pressure	A/C On	2.39 Volts Varies
A/C High Side Pressure		868 kPa / 125 psi Varies	The scan tool displays -103 to +3,119 kPa (-14 to +452 psi). This is the A/C refrigerant pressure sensor voltage signal converted to pressure.
A/C High Side Pressure	A/C On	1568 kPa / 227 psi Varies
A/C Off for WOT		No	This parameter indicates if the A/C system was commanded off for a wide open throttle event.
A/C Pressure Disable		No	The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 3,034 kPa (440 psi).
A/C Relay Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
A/C Relay Ckt Open Test Status		OK	This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
A/C Relay Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the A/C relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
A/C Relay Command		Off	The scan tool displays ON or OFF. ON is displayed when the ECM has energized the A/C compressor clutch relay.
A/C Relay Command	With A/C Selected	On
A/C Relay Request Signal		No	The scan tool displays Yes or No. Yes is displayed when the HVAC control module is requesting A/C operation.
A/C Relay Request Signal	With A/C Selected	Yes
Air Flow Calculated		3-6 g/s	This parameter displays the air flow of the engine as calculated by the control module using information from the manifold absolute pressure (MAP) sensor. The scan tool will display a range of values indicating a high air flow when MAP pressure is high and a low air flow when MAP pressure is low. This value is listed in grams per second (g/s).
AIR Indicated Pressure		0.00 kPa	This parameter displays the normalized secondary air injection system pressure. The normalized pressure is the filtered pressure minus the ambient air pressure measured by the sensor.
AIR Monitor Complete This Ignition		Varies	This parameter displays the completion status during the current driving/monitoring cycle of the non continuous legislated emission related monitor. The states include: Yes or No.
AIR Monitor Enabled This Ignition		Varies	This parameter displays the enable status during the current driving/monitoring cycle of the non continuous legislated emission related monitor. The states include: Yes or No.
AIR Pressure Sensor		Same as BARO	This parameter displays the unfiltered secondary air injection system pressure.
AIR Pressure Sensor		2.6 volts near sea level, varies with altitude	This parameter displays the secondary air injection system pressure analog input as a percentage of its reference voltage.
AIR Pressure Sensor Variance		0.00 kPa	This parameter displays the weighted average pressure error (difference between the predicted and actual secondary air injection system pressure) during the secondary air injection on test (phase 1).
AIR Pump Relay Ckt Short Volts Test Status		Not Run	This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
AIR Pump Relay Ckt Short Gnd Test Status		Not Run	This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
AIR Pump Relay Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the AIR pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
AIR Pump Relay Command		OFF	This parameter displays the commanded state of the secondary air injection pump. The states include: On or Off.
AIR Sol Ckt Open Test Status		OK	This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
AIR Sol Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
AIR Sol Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the AIR solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
AIR Solenoid Command		OFF	This parameter displays the commanded state of the secondary air injection valve. The states include: On or Off.
Ambient Air Temperature		Varies	Outside temperature at any given altitude expressed in degrees centigrade (°C) and Fahrenheit (°F).
APP Indicated Angle	Accelerator pedal not actuated	0%	This parameter displays the angle, in percent, of the accelerator pedal as calculated by the control module using the signals from the accelerator pedal position sensors. The accelerator pedal position (APP) indicated angle is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
APP Indicated Angle	Accelerator pedal fully actuated	100%
APP Sensors		0%	This parameter displays the average of the accelerator pedal position (APP) sensors as calculated by the throttle actuator control (TAC) module. The APP average is a range of values indicating a low number when the accelerator pedal is not depressed to a high number when the accelerator pedal is fully depressed. This value is listed in percent.
APP Sensor 1	Accelerator pedal not actuated	1.04 Volts	This parameter displays the voltage signal sent to the control module from APP sensor 1 of the APP sensor assembly. APP sensor 1 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
APP Sensor 1	Accelerator pedal fully actuated	4.27 Volts
APP Sensor 1 and 2		Agree	This parameter displays the results of a control module test that compares the signals from the APP sensors 1 and 2. The scan tool will display Agree or Disagree. Agree indicates that APP sensor 1 and APP sensor 2 voltages correspond to the same accelerator pedal position. Disagree indicates that APP sensor 1 and APP sensor 2 voltages correspond to different accelerator pedal positions.
APP Sensor 1 Indicated Position	Accelerator pedal not actuated	0%	This parameter displays the position of the APP sensor 1 as calculated by the control module using the signal from the APP sensor 1. APP sensor 1 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
APP Sensor 1 Indicated Position	Accelerator pedal fully actuated	100%
APP Sensor 2	Accelerator pedal not actuated	0.47 V	This parameter displays the voltage signal sent to the control module from APP sensor 2 of the APP sensor assembly. APP sensor 2 is a range of values indicating a low voltage when the accelerator pedal is not depressed to a high voltage when the accelerator pedal is fully depressed.
APP Sensor 2	Accelerator pedal fully actuated	2.10 Volts
APP Sensor 2 Indicated Position	Accelerator pedal not actuated	0%	This parameter displays the angle of the APP sensor 2 as calculated by the control module using the signal from the APP sensor 2. APP sensor 2 is a range of values indicating a low percentage when the accelerator pedal is not depressed to a high percentage when the accelerator pedal is fully depressed.
APP Sensor 2 Indicated Position	Accelerator pedal fully actuated	100%
BARO		60-104 kPa (varies with altitude)	This parameter displays the barometric pressure as calculated by the control module using the signal from the manifold absolute pressure (MAP) sensor measured when the ignition is turned on with the engine not running. The control module will update the barometric pressure during wide-open throttle (WOT) conditions.
BPP Circuit Signal		Released	The scan tool displays Applied or Released. This parameter shows the position of the brake pedal position sensor through the stop lamp switch signal circuit.
BPP Circuit Signal	Brake pedal depressed	Applied
BPP Signal		Released	The scan tool displays Applied, Released, or Invalid. This parameter shows the position of the brake pedal position sensor through the serial data bus.
BPP Signal	Brake pedal depressed	Applied
Calc. TWC Temp.		446°C/834°F Varies	Calculated catalytic converter temperature.
Catalyst Monitor Complete This Ignition		Varies	This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No
Catalyst Monitor Enabled This Ignition		Varies	This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
Catalytic Converter Protection Active		No	This parameter displays the state of the Catalytic Converter Protection mode.
Change Engine Oil Indicator Command		Off	The scan tool displays ON or OFF. This is the state of the Change Engine Oil indicator as commanded by the ECM.
CKP Active Counter		0-255 Counts incrementing	This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position (CKP) sensor.
CKP Resync Counter		0 Counts	This parameter displays the number of times the control module has to resynchronize the CKP sensor.
CKP Sensor		Same as Engine Speed	This parameter displays the engine speed as calculated by the control module using the signal from the CKP sensor.
Cmmd. A/F Equivalence Ratio		1.0:1	Equivalence numbers greater than one represent excess fuel in the fuel air mix. Equivalence numbers less than one represent a deficiency of fuel in the fuel air mix for complete combustion. The equivalence ratio will be reported as one when the vehicle is in Closed Loop.
CMP Active Counter		0-255 Counts incrementing	This parameter displays an incrementing counter when the control module receives a signal from the camshaft position (CMP) sensor.
CMP Angle		0°	This parameters shows the actual amount, in camshaft degrees, of camshaft actuation.
CMP Command		0%	This parameters shows the commanded percentage of the CMP actuator, by the control module.
CMP Sensor		Same as Engine Speed	This parameter displays the speed of the engine as calculated by the signal from the CMP sensor.
CMP Sol Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
CMP Sol Ckt Open Test Status		OK	This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
CMP Sol Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the CMP solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
CMP Variance		0.0°	This parameter shows the difference, in degrees of camshaft actuation, between the desired camshaft position and the actual position.
Cold Startup		Varies	This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during this ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle.
Cooling Fan Command		0-100% Varies	This parameter displays the amount of fan power commanded by the ECM.
Crank Request Signal		No	This parameter shows the power mode status of the starter motor. When Yes is displayed, a request to engage the starter has been received by the ECM.
Crank Request Signal	Ignition switch in the crank position	Yes
Cruise Disengage 1-8 History		Varies	These parameters indicate the last 8 reasons the ECM disengaged the cruise control. Reason 1 contains the most recent reason. The reasons include the following: Brake Pedal Initialize, Cancel, Clutch, Coast Disengage, Coast Speed Low, TAC Inhibit, Accel Rate, Decel Rate, High Speed, Illegal Mode, Low Speed, None, Cruise Sw OFF, Over Set Speed, S/C On Speed Hi, ECM Inhibit, Simul S/C-R/A, TCS, Under Set Speed, DLC Override, Memory DTC, Eng Run Time, Engine Speed, DTC Set, RPM Limit, First Gear, APP Override, Low Voltage, D Whl Spd Low, D Whl Spd Hi, Cruise S/S, Cruise Sw Data, ECT Overtemp, VSES, Trans. DTC, BPP Data, BPP DTC, Park Brake, ACC Inhibit, ACC Brake DTC, ACC Option, ACC Brake Inop, PTO Active.
Cruise Cancel Switch		Inactive	The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM).
Cruise Cancel Switch	Switch pressed	Active
Cruise Control Active		No	This parameter displays the status of the cruise control system as determined by the control module. The scan tool will display Yes when the cruise control system is in control of vehicle speed. The scan tool will display No when the cruise control system is not operating.
Cruise On/Off Switch		Off	The scan tool displays ON or OFF. This is the state of the switch as monitored by the body control module (BCM).
Cruise On/Off Switch	Switch pressed	On
Cruise Resume/Accel. Switch		Inactive	The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM).
Cruise Resume/Accel. Switch	Switch pressed	Active
Cruise Set/Coast Switch		Inactive	The scan tool displays Active or Inactive. This is the state of the switch as monitored by the body control module (BCM).
Cruise Set/Coast Switch	Switch pressed	Active
Cycles of Misfire Data		0-100 Counts incrementing	This parameter displays the number of cylinder firing events that were recorded as misfires as determined by the control module.
Cyl. 1-6 Inj. Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 1-6 Inj. Ckt Open Test Status		OK	This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 1-6 Inj. Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fuel injector control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Cyl. 1 and 4 IC Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 1 and 4 IC Ckt Open Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 1 and 4 IC Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Cyl. 2 and 5 IC Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 2 and 5 IC Ckt Open Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 2 and 5 IC Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Cyl. 3 and 6 IC Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Cyl. 3 and 6 IC Ckt Open Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Cyl. 3 and 6 IC Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the ignition control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Decel. Fuel Cutoff		Inactive	This parameter displays the status of the operating mode used to turn off the fuel injectors during certain deceleration conditions. When the scan tool displays Active, the control module has turned off the fuel injectors. When the scan tool displays Inactive, the fuel system is operating normally.
Desired CMP		0°	This parameter displays the desired camshaft position, in degrees, as calculated by the control module.
Desired Idle Speed		768 RPM	This parameter displays the engine idle speed in RPM commanded by the control module. The control module compensates for various engine loads in order to maintain the desired engine RPM at idle. This parameter is not valid unless the engine is running.
Distance Since DTC Cleared		Varies	This parameter displays the distance accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing distance as the vehicle is driven.
EC Ign. Relay Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EC Ign. Relay Ckt Open Test Status		OK	This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EC Ign. Relay Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the engine control ignition relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EC Ignition Relay Feedback Signal		13.0-14.2 Volts	This parameter displays the voltage signal sent to the control module from the engine control ignition relay. The scan tool will display battery voltage when the engine is running. The scan tool will display no voltage when the relay is OFF.
EC Ignition Relay Command		On	This parameter displays the commanded state of the EC Ignition relay control circuit. The scan tool will display ON or OFF. ON indicates the EC ignition relay control circuit is being grounded by the control module, allowing voltage to other control module circuits and systems. OFF indicates the EC ignition relay is not being commanded on by the control module.
ECM Authentication Status		Valid	This parameter indicates the result of the comparison between the last received immobilizer system response and the expected response calculated by the ECM.
ECM Challenge Status		Invalid	This parameter shows the immobilizer system status of the ECM challenge. This indicates whether the currently calculated ECM challenge is valid.
ECM Response Source		Normal	The parameter indicates the source used to calculate the ECM response. The sources include Normal Start, Remote Vehicle Start, PTO Remote Start.
ECT Sensor		96-103°C/204-217°F	This parameter displays the temperature of the engine coolant based on the input from the engine coolant temperature sensor. When the coolant temperature is low, the scan tool will display a low temperature. When the coolant temperature is high, the scan tool will display a high temperature.
Engine Load		Varies	This parameter displays the engine load in percent based on inputs to the control module from various engine sensors. The scan tool will display a low percentage when the engine is at idle with little or no load. The scan tool will display a high percentage when the engine is running at a high RPM under a heavy load.
Engine Oil Pressure Sensor		137-193 kPa/20-28 psi	This parameter displays the engine oil pressure.
Engine Oil Pressure Sensor		1.39 Volts Varies	This parameter displays the engine oil pressure sensor output in volts.
Engine Oil Level Switch		OK	This parameter indicates if the engine oil level is OK or Low.
Engine Oil Life Remaining		Varies	This parameter indicates the percentage of time left before an oil change is necessary according to the oil life monitor.
Engine Oil Temperature Calculated		109°C/228° F Varies	This parameter displays the engine oil temperature.
Engine Off Time		Varies	This parameter displays the time elapsed since the engine was shut OFF.
Engine Run Time		Varies	This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running.
Engine Speed		750-800 RPM	This parameter displays the speed of the crankshaft as determined by the control module using an input from the crankshaft position (CKP) sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds.
EPM Inhibit Reason		Varies	This parameter displays the reason for the regulated voltage control (RVC) override command. RVC lowers system operating voltage to reduce the system electrical load and improve fuel economy performance. The RVC command will be overridden if the voltage commanded is below the minimum system voltage required to ensure that the fuel demand, powertrain OBD diagnostics, airflow measurement, cylinder deactivation, or transmission control module functions will execute properly. Reasons include the following: None, Device Control, Fuel Demand, OBD Diagnostics, Airflow Measurement, Cylinder Deactivation, Transmission Control Module Request.
EVAP Fault History		No Fault	This parameter displays the result of the evaporative emission (EVAP) system diagnostic. Scan tool displays NO FAULT, EXCESS VACUUM, PURGE VALVE LEAK, SMALL LEAK, WEAK VACUUM, or NO TEST RESULT. The EVAP Fault History indicates the status of EVAP system diagnostics performed by the ECM.
EVAP Monitor Complete This Ignition		Varies	This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
EVAP Monitor Enabled This Ignition		Varies	This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
EVAP Purge Sol Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EVAP Purge Sol Ckt Open Test Status		OK	This parameter displays the status of the output driver for the EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EVAP Purge Sol Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fan EVAP purge solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EVAP Purge Solenoid Command		10-15% Varies	This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the control module expressed as a percent. The scan tool will display a high percentage when the control module is commanding the EVAP purge solenoid to be open a large amount. The scan tool will display a low percentage when the control module is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the control module is commanding the EVAP purge solenoid closed.
EVAP Vent Sol Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
EVAP Vent Sol Ckt Open Test Status		OK	This parameter displays the status of the output driver for the EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
EVAP Vent Sol Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fan EVAP vent solenoid control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
EVAP Vent Solenoid Command		Venting	This parameter displays the state of the EVAP vent solenoid commanded by the control module expressed as a Venting or Not Venting. The scan tool will display a venting when the control module is commanding the EVAP vent solenoid to be open. The scan tool will display a not venting when the control module is commanding the EVAP vent solenoid to be closed.
Ext. Travel BPP Signal		Released	This parameter displays Applied, Released, or Invalid. A state of Applied indicates the brake pedal position sensor has traveled beyond a moderate, extended threshold as determined by the brake sensing module and received over serial data.
Ext. Travel BPP Signal	Brake Pedal firmly applied	Applied
FC Relay 1 Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
FC Relay 1 Ckt Open Test Status		OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
FC Relay 1 Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fan control relay 1 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
FC Relay 1 Command		On	This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM.
FC Relay 2 and 3 Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
FC Relay 2 and 3 Ckt Open Test Status		OK	This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
FC Relay 2 and 3 Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fan control relay 2 and 3 control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
FC Relay 2 and 3 Command		Off	This parameter displays ON or OFF. This indicates the commanded state of the relay by the ECM.
Fuel Alcohol Content		Varies	This parameter displays the percentage of alcohol in the fuel. The value is calculated by the ECM using various sensor inputs.
Fuel Composition Learn		Inactive	This parameter displays Active or Inactive. Active will be displayed if the ECM is learning the alcohol content of the fuel.
Fuel Level Sensor		Varies	This parameter displays the approximate fuel level in the fuel tank as a voltage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full.
Fuel Pump Relay Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Fuel Pump Relay Ckt Open Test Status		OK	This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Fuel Pump Relay Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Fuel Pump Relay Command		On	This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be on when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be off when the scan tool indicates the Fuel Pump Relay Command is Off.
Fuel Tank Level Remaining		Varies	This parameter displays the amount of fuel remaining in the fuel tank as a percentage. The control module calculates this level using the signal from the sensor used to monitor the fuel level in the fuel tank. The scan tool will display a low reading when the fuel level in the tank is low or near empty. The scan tool will display a high reading when the fuel level in the tank is high or near full.
Fuel Tank Pressure Sensor		19.8 to +12.52 mm Hg/-10.5 to +6.17 in H2O	This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high.
Fuel Tank Pressure Sensor		0.2-4.0 V	This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low.
Fuel Tank Rated Capacity		64.2 Liters/17 Gallons	This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle.
Fuel Trim Cell		0	This parameter displays the fuel trim cell number as calculated by the control module based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load.
Fuel Trim Learn		Enabled	This parameter indicates if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled.
Fuel Trim System Test State		Varies	This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test.
Fuel Volatility		Varies	This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool displays Low, Moderate, or High. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.
GEN F-Terminal Signal		45% Varies with electrical load	This parameter is an ECM input of the generator field duty cycle. This is an indication of generator load on the engine.
GEN L-Terminal Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
GEN L-Terminal Ckt Open Test Status		OK	This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
GEN L-Terminal Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the generator L-terminal control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
GEN L-Terminal Command		65% Varies with electrical load	The scan tool displays 0-100 percent. The scan tool displays the percentage of the output voltage of the generator.
GEN L-Terminal Signal Command		On	This parameter indicates the generator commanded state by the ECM.
HO2S Heater Monitor Complete This Ignition		Varies	This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
HO2S Heater Monitor Enabled This Ignition		Varies	This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
HO2S/O2S Monitor Complete This Ignition		Varies	This parameter displays the completion status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
HO2S/O2S Monitor Enabled This Ignition		Varies	This parameter displays the enable status during the current driving/monitoring cycle of the non-continuous legislated emission related monitor. The states include: Yes or No.
HO2S 1		50-950 mV and Varying	The scan tool displays a range of 0-1,106 mV. The HO2S 1 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV, and 1,000 mV, while operating in Closed Loop.
HO2S 1 Heater		0.76 Amps	This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S Heater Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S 1 Heater Command		Varies	This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON.
HO2S 1 Heater Command		On	This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON.
HO2S 1 Htr Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
HO2S 1 Htr Ckt Open Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
HO2S 1 Htr Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
HO2S 2	50-850 mV and Varying		The scan tool displays a range of 0-1,106 mV. The HO2S bank 2 parameter represents the exhaust oxygen sensor output voltage. The voltage fluctuates constantly within a range between 10 mV, and 1,000 mV, while operating in Closed Loop.
HO2S 2 Heater	0.76 Amps		This parameter displays the current through the control module when the HO2S heater is commanded ON by the control module. HO2S heater Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.
HO2S 2 Heater Command	Varies		This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display a higher percentage as the heater command is increased, and a lower percentage if the heater is not commanded ON.
HO2S 2 Heater Command	On		This parameter displays the commanded state of the HO2S heater by the control module. The scan tool will display On as the heater is commanded on, and Off if the heater is not commanded ON.
HO2S 2 Htr Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
HO2S 2 Htr Ckt Open Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
HO2S 2 Htr Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the HO2S heater control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
HOT Open Loop		Inactive	This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in open loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally.
IAT Sensor		Varies	The scan tool displays °C/F. The ECM converts the resistance of the intake air temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. Intake air temp is used by the ECM to adjust fuel delivery and spark timing according to incoming air density. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The ECM converts the resistance of the intake air temperature sensor to degrees. The ECM uses the IAT in order to adjust fuel delivery and spark timing according to incoming air density.
Ignition 1 Signal		13-14.2 Volts	This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position.
Ignition Accessory Signal		On	This parameter displays the state of the ignition 0 input to the control module from the ignition switch. The scan tool will display On when the ignition switch is in the ignition accessory position. The scan tool will display Off when the ignition switch is in any other position.
Inj. 1-6 Disabled Due to Misfire		No	This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.
Injector PWM		1.55-1.85 ms	The scan tool displays mS Indicates the base PWM or ON time of the fuel injectors in milliseconds. When the engine load is increased, the injector pulse width will increase. Indicates the amount of time the PCM is commanding each injector ON during each engine cycle. A longer injector pulse width will cause more fuel to be delivered. Injector pulse width should increase with increased engine load.
Intake Manifold Pressure		Varies	This parameter displays the pressure difference between the MAP and the barometric pressure (BARO) as calculated by the control module. The scan tool will display a higher value during high vacuum conditions, such as idle or deceleration. The scan tool will display a lower value during low vacuum conditions, such as wide open throttle or high load cruising.
Knock Detected Cyl. 1-6		No	This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if there is no knock condition detected related to that cylinder combustion event.
Knock Retard		0 Degrees	The scan tool displays °. Indicates the amount of spark the PCM is removing from ignition control (IC) spark advance in response to the signal from the knock sensors. The traction control system desired torque signal from the electronic brake and traction control module (EBTCM) may cause knock retard to display a value more than 0.0 degrees if traction control is active.
Long Term FT		10 to +10%	The scan tool range is -99 to +99 percent. This parameter indicates the Long Term fuel trim (FT) correction for bank 1 as commanded by the PCM. A change made to the fuel delivery will be indicated by the Long and Short Term FT values. The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition.
Loop Status		Closed	Closed loop indicates that the PCM is controlling fuel delivery according to oxygen sensor voltage. In open loop, the PCM ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on throttle position (TP) sensor, ECT, and MAF sensor inputs only.
Low Engine Oil Level Indicator Command		Off	The scan tool displays ON or OFF. This is the state of the low engine oil level indicator as monitored by the ECM.
Low EOP Indicator Command		Off	The scan tool displays ON or OFF. This is the state of the low engine oil pressure indicator as monitored by the ECM.
LT FT Test Avg.		0.68%	This parameter is the average long term fuel trim for this bank as calculated by the control module. The scan tool will display a value more than 0 percent indicating that time is being added to the injector pulse width, increasing the amount of fuel to this bank of the engine. The scan tool will display a value of less than 0, indicating time is being subtracted from the injector pulse width, reducing the amount of fuel to this bank of the engine. A value of 0 percent indicates no compensation is required to operate the engine at the desired air/fuel ratio.
LT FT Test Avg. w/o Purge		1.02%	This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will display a high value for a large amount of long term fuel correction, and 0 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
MAF Performance Test		OK	This parameter displays the status of the mass air flow (MAF) performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAF Sensor		3-6 g/s (varies with altitude)	The scan tool displays g/s The scan tool displays a range of 0.0-655 g/s. The mass air flow (MAF) is the MAF input frequency converted to grams of air per second. This indicates the amount of air entering the engine.
MAF Sensor		1,200-1,300 Hz (varies with altitude)	The scan tool displays a range of 0-31,999 Hz. The MAF sensor is a hot wire type air flow sensor. The ECM converts current draw needed by the MAF to keep the hot wires at a constant into a frequency signal. The scan tool displays this frequency in a hertz signal.
MAP Performance Test 1		OK	This parameter displays the status of the MAP performance test 1 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAP Performance Test 2		OK	This parameter displays the status of the MAP performance test 2 by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
MAP Sensor		20-48 kPa (varies with altitude)	The scan tool displays kPa. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold.
MAP Sensor		0.4-2.0 V (varies with altitude)	The scan tool displays Volts. The MAP sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold.
MIL Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
MIL Ckt Open Test Status		OK	This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
MIL Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the malfunction indicator lamp control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
MIL Command		Off	This parameter displays the commanded state of the MIL control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check.
MIL Requested by DTC		No	This parameter shows if the illumination of the MIL has been requested by a failed diagnostic trouble code (DTC).
Misfire Current Cyl. 1-6		0 Counts	The scan tool displays 0-255 counts. The display shows the number of misfires that have been detected during the last 200 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers.
Misfire History Cyl. 1-6		0 Counts	The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
PNP Switch		Park/Neutral	The scan tool displays the position of the transmission selection as Park/Neutral or In Gear.
Power Enrichment		Inactive	Scan tool displays ACTIVE or INACTIVE. ACTIVE displayed indicates that the PCM has detected conditions appropriate to operate in Power Enrichment mode. The PCM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occurring during acceleration.
Output Shaft Speed Sensor		0 RPM	The parameter shows the transmission output speed, the speed at the output of the gear box, determined from the speed measured by the transmission output speed (TOS) sensor with the application of the factors to account for the location of the sensor, e.g. after the gear box, after the final chain, after the transfer case, after the final drive, etc. In applications that include both a transmission output speed sensor and a transfer case speed sensor, this parameter will apply specifically to the output of the transmission.
Reduced Engine Power		Inactive	The scan tool displays Active or Inactive. The scan tool displays Active when the PCM receives a signal from the TAC module that a throttle actuator control system fault is occurring. The PCM limits the engine power.
RVS Disable 1-8 History		Varies	These parameters show the last 8 reasons the ECM disabled remote vehicle start (RVS). Reason 1 is the most current reason.
RVS Request Signal		Off	This parameter indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode.
Short Term FT		10 to +10%	The Short Term FT values change rapidly in response to the HO2S signal voltages. These changes fine tune the engine fueling. The Long Term FT values change in response to the trends in the Short Term FT. The Long Term FT makes coarse adjustments to the fueling in order to re-center and restore control to the Short Term FT. The Short Term FT and the Long Term FT can be monitored with a scan tool. A positive fuel trim value indicates that the ECM is adding fuel in order to compensate for a lean condition. A negative fuel trim value indicates that the ECM is reducing the amount of fuel in order to compensate for a rich condition.
Spark		18-24 Degrees	The scan tool displays a range of -64 to +64°. The scan tool displays the amount of degrees the PCM commands. The PCM computes the desired spark advance using the following: (1) ECT, (2) engine speed (RPM), (3) load, (4) vehicle speed. The PCM adjusts the timing. A negative (-) value indicates degrees before top dead center (BTDC) or spark advance; a positive value indicates degrees after top dead center (ATDC) or spark retard.
ST FT Test Avg.		0.98-1.00%	This parameter is calculated by the control module based on an intrusive test by the control module. The Short Term FT Test Average used for the short term correction of the fuel delivery. The scan tool will display a high value for a large amount of short term fuel correction, and 0 percent for no short term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.
Starter Relay Ckt Short Gnd Test Status		OK	This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to ground on the circuit.
Starter Relay Ckt Open Test Status		OK	This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is an open in the circuit.
Starter Relay Ckt Short Volts Test Status		OK	This parameter displays the status of the output driver for the starter relay control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Fault if there is a short to voltage on the circuit.
Starter Relay Command		Off	The scan tool displays ON or OFF. This displays the commanded state of the starter relay by the ECM.
Starter Relay Command	Ignition switch in the crank position	On
Start-up ECT		Varies	Indicates the engine coolant temperature at engine start up. The scan tool displays a range of -39 to +140°C (-38 to +284°F). The scan tool displays the engine ECT at the time the engine was started. The PCM uses start-up ECT for certain DTCs. Indicates the engine coolant temperature at the time that the vehicle was started. Used to determine if the last startup was a cold start.
Start-up IAT		Varies	Indicates the IAT at the time that the vehicle was started. Used to determine if the last startup was a cold start. The scan tool range is -39 to +140°C (-38 to +284°F). This parameter indicates the ambient air temperature at start-up.
TAC Forced Engine Shutdown		No	This parameter indicates the status of TAC control by the control module. The scan tool will display YES if the engine has been shut down due to a throttle control fault. The scan tool will display NO if the engine has not been shut down by a throttle control fault.
TAC Motor		Enabled	This parameter indicates the status of the TAC motor driver by the ECM. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display disabled if the TAC motor is disabled.
TAC Motor Command		15-25%	This parameter indicates the required duty cycle to maintain a desired throttle position. The scan tool will display a higher value if more effort is required to move the throttle to the desired position, such as physical resistance. The scan tool will display a lower value if less effort is required to move the throttle to the desired position.
TB Idle Airflow Compensation		32% Varies	This parameter indicates the amount of airflow compensation in response to engine intake air flow restrictions.
TFT Sensor (If equipped)		Varies	This parameter indicates the transmission fluid temperature measured by a sensor. In automatic transmission applications, this is based upon the transmission fluid temperature sensor input to the TCM. In manual transmission applications with a transmission fluid temperature sensor, this is based upon the transmission fluid temperature sensor input to the ECM.
Torque Delivered Signal		2-6 ft-lbs	Represents the PWM signal which indicates the available torque the engine is delivering to the drive wheels. The EBTCM monitors the traction control torque signal to ensure that the ECM is responding properly to the traction control desired torque signal.
Torque Management Spark		0%	This parameter indicates how much the ignition spark timing is being retarded to control torque by the control module. The scan tool will display a higher value under extreme torque control conditions such as spinning wheels. The scan tool will display a lower value under low torque control conditions such as light driving.
Total Knock Retard		0 Degrees	This parameter indicates how much ignition spark timing is being retarded due to all control systems monitored by the control module. The scan tool will display a high value during extreme conditions such as high temperatures and antilock braking. The scan tool will display a lower value during lighter driving conditions.
Total Misfire		0 Counts	The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
TP Desired Angle		6%	The scan tool displays %. The scan tool displays 0-100 percent. The PCM indicates the desired throttle angle commanded by the vehicle operator. The scan tool indicates the desired throttle angle commanded by the vehicle operator.
	With Ignition On, Engine Off, Accelerator pedal not actuated	11%
	With Ignition On, Engine Off, Accelerator pedal fully actuated	100%
TP Indicated Angle		6%	This parameter displays the angle of the TP in percent. This information is calculated by the control module using the signals from the throttle position sensors. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.
	With Ignition On, Engine Off, Accelerator pedal not actuated	29%
	With Ignition On, Engine Off, Accelerator pedal fully actuated	100%
TP Performance Test		OK	This parameter displays the status of the TP performance test by the control module. The scan tool will display OK if no fault is found. The scan tool will display Fault if the control module detects a fault during the test.
TP Sensor 1		4.06 Volts	This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 1 of the TP sensor assembly. The scan tool will display a high voltage when the throttle plates are at rest. The scan tool will display a low voltage when the throttle plates are fully open.
	With Ignition On, Engine Off, Accelerator pedal not actuated	3.27 Volts
	With Ignition On, Engine Off, Accelerator pedal fully actuated	0.80 Volts
TP Sensor 1 Indicated Position		6%	This parameter displays the angle of the TP sensor 1 in percent. This information is calculated by the control module using the signal from the throttle position sensor 1. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.
	With Ignition On, Engine Off, Accelerator pedal not actuated	29%
	With Ignition On, Engine Off, Accelerator pedal fully actuated	100%
TP Sensor 1 Learned Minimum		0.69 Volts	This parameter displays the learned minimum voltage for TP sensor 1 as determined by the control module this ignition cycle.
TP Sensors 1 and 2		Agree	This parameter displays the results of a control module test that compares the signals from the TP sensors 1 and 2. The scan tool will display Agree when the signal from TP sensor 1 corresponds with the signal from TP sensor 2. The scan tool will display Disagree when the signal from TP sensor 1 conflicts with the signal from TP sensor 2.
TP Sensor 2		0.90 Volts	This parameter displays the voltage signal sent to the control module from the sensor used to monitor the position of the throttle plates. This parameter is for sensor 2 of the TP sensor assembly. The scan tool will display a low voltage when the throttle plates are at rest. The scan tool will display a high voltage when the throttle plates are fully open.
	With Ignition On, Engine Off, Accelerator pedal not actuated	1.69 Volts
	With Ignition On, Engine Off, Accelerator pedal fully actuated	4.16 Volts
TP Sensor 2 Indicated Position		6%	This parameter displays the angle of the TP sensor 2 in percent. This information is calculated by the control module using the signal from the throttle position sensor 2. The scan tool will display a low percentage when the throttle plates are closed. The scan tool will display a high percentage when the throttle plates are fully open.
	With Ignition On, Engine Off, Accelerator pedal not actuated	28%
	With Ignition On, Engine Off, Accelerator pedal fully actuated	100%
TP Sensor 2 Learned Minimum		0.69 Volts	This parameter displays the learned minimum voltage for TP sensor 2 as determined by the control module this ignition cycle.
TWC Mon. Bank 1 Test Result		No Result	This parameter indicates the status of the catalyst monitor diagnostic for bank 1. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 1.
TWC Mon. Bank 2 Test Result		No Result	This parameter indicates the status of the catalyst monitor diagnostic for bank 2. Multiple tests may run before the diagnostic reports a Passed or Failed. When a determination has been made, the diagnostic is complete for the current trip and will not attempt any further tests on bank 2.
TWC Mon. Off Idle Test Conditions Met		No	This parameter indicates if the off-idle conditions for the catalyst monitor diagnostic have been met. Once the off-idle conditions have been met, Yes is displayed and the vehicle can return to idle and allow the catalyst monitor diagnostic test to run.
TWC Monitor Test State		Inactive	This parameter indicates when the catalyst monitor diagnostic is actively running a test. This condition will only be true when the vehicle is at idle.
Vehicle Speed Sensor		0 km/h/mph	The scan tool range is 0-200 km/h (0-125 mph). This parameter displays the vehicle speed. The PCM receives reference pulses from the vehicle speed sensor (VSS) and converts them into km/h and mph for display.
VTD Auto Learn Counter		0 Counts	This parameter indicates the number of auto-learn cycles that have been successfully completed within the immobilizer system.
VTD Auto Learn Timer		0 Seconds	This parameter indicates the time elapsed within the current auto-learn cycle within the immobilizer system.
VTD Password Learn Enabled		No	This parameter indicates if learning of the immobilizer secret information is enabled.
VTD Security Code Accepted		No	This parameter indicates that the received immobilizer system security code is correct.
VTD Security Code Lockout		Inactive	This parameter displays Active or Inactive. Security Code Lockout Active indicates that the security code has not passed and lockout is active.
VTD Security Code Programmed		No	This parameter indicates if the immobilizer system security code has been programmed.
VTD Security Info. Programmed		Yes	This parameter indicates if the immobilizer secret information, e.g. powertrain pre-release password, powertrain secret key, has been programmed.
VTD System Status		Dis. Neg. Resp.	This parameter indicates the current state of the immobilizer algorithm. The states include the following: Standby, Disabled at Startup, Disabled Due to No Response, Disabled Due to Negative Response, Disabled Due to Incorrect Response, Post Release, Pre-Release, Released.
Warm-ups Since DTC Cleared		Varies	The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles since a DTC was cleared from memory. The scan tool displays counts.
Warm-ups w/o Emission Faults		0	The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without an emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing the information with a scan tool or a loss of power to the PCM also resets the counter to 0. The scan tool displays counts. This display indicates the number of warm-up cycles without a emission failure.
Warm-ups w/o Non-Emission Faults		0	The scan tool displays a range of 0-255. This parameter counts the number of warm up cycles without a non-emission fault present. The counter increments to 255 and rolls back to 0 unless a fault occurs. If a fault occurs, the counter reverts back to 0 until the fault is corrected. Clearing information with a scan tool or a loss of power to the PCM also resets the counter to 0.
Wide Open Throttle		No	This parameter indicates the throttle status commanded by the control module. The scan tool will display YES is the vehicle throttle is commanded to wide open. The scan tool will display NO if the vehicle throttle is commanded to an amount less than 100 percent.

Engine Control Module Scan Tool Data Parameters

Output Control	Description
A/C Relay	The commanded states are ON or OFF. The command turns the A/C relay ON or OFF, which engages or disengages the A/C compressor clutch.
AIR Pump Relay	This output control is used to turn the AIR pump on or off.
AIR Service Bay Test	This output control is used to trigger the secondary air injection (SAI) diagnostic service bay test, which causes the on board SAI diagnostic to execute until it is completed or aborted. The SAI diagnostic consists of three phases, SAI on test, SAI valve shut test, and SAI pump off test.
AIR Solenoid	This output control is used to turn the AIR valve on or off.
AIR System	This output control is used to turn the AIR pump and the AIR valve on or off.
CMP Actuator	Activates the CMP actuator. Commands the desired CMP from 0-25 degrees in 5 degree increments. The commanded states include Increase and Decrease. The normal state is NONE. The system remains in the commanded state until cancelled by the tool.
CMP Actuator Solenoid	Activates the CMP actuator. The commanded states include ON and OFF. The normal state is NONE. The system remains in the commanded state until cancelled by the tool.
Crankshaft Pos. Variation Learn	This output control is used to activate the crankshaft position variation learn (CASE) algorithm which calculates the reference pulse correction factors for the misfire diagnostic.
Cylinder Power Balance	Enables/disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met: All the instructions on the scan tool have been completed. The engine speed has stabilized. The fuel injector has been selected. When DISABLE is selected, the control module turns the injector OFF for 30 seconds.
Engine Controls Ignition Relay	Activates the engine controls ignition relay. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the tool.
Engine Speed Control	Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 500-1,950 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool.
EVAP Purge/Seal	Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
EVAP Purge Solenoid	Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -22 mm Hg (-11 in H2O).
EVAP Service Bay Test	Activates the on-board EVAP diagnostic test.
EVAP Vent Solenoid	Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
Fan Relay 1	The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF.
Fan Relay 2 & 3	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed.
Fan Relays 1, 2, & 3	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed.
Fuel Composition Reset	Important: Do not use this output control unless the actual alcohol content of the fuel in the tank is 10 percent or less. This will reset the learned alcohol composition to 0 percent in the engine control module (ECM).
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: All instruction on the scan tool completed. Fuel injector selected Key ON, engine OFF The selected fuel injector can only be flowed/pulsed once per ignition cycle.
Fuel Pump Relay	Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running.
Fuel Trim Enable	Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool.
Fuel Trim Reset	Activates the reset of fuel trim data in all fuel trim cells.
GEN L-Terminal	The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage.
HO2S Heater Learn	This output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine off time, typically 12 or more hours.
HO2S Heater Sensor 1	Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature.
HO2S Heater Sensor 2	Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature.
Idle Learn Reset	This output control is used to reset the learned airflow adaptive values to their initial values.
Idle Spark	Disables and enables idle spark advance with the engine running.
Loop Status	Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool.
Malfunction Indicator Lamp	Activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool.
Misfire Graphic	Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph.
Oil Life Reset	The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life.
RVS Disable History Reset	This output control is used to trigger the reset of the last 8 reasons the ECM has disabled remote vehicle start (RVS).
Spark Retard	Controls the amount of spark retard. The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The normal commanded state is none.
Starter Relay	This output control is used to override the state of the starter relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON.
Throttle Position	Operates TAC motor in from 0-100 percent in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF.
Throttle Sweep	This function moves the Throttle plate slowly from a closed position to wide open position, aiding diagnosis of TAC motor.

Engine Control Module Scan Tool Output Controls

Engine Control Module Scan Tool Information (3.9L)

Use the Engine Scan Tool Data List only after the following is determined

The «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) is completed.
No diagnostic trouble codes (DTCs)
On-board diagnostics are functioning properly

IMPORTANT

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

Engine Control Module Scan Tool Data Parameters

Output Control	Description
A/C Relay	The commanded states are ON or OFF. The command turns the A/C relay ON or OFF, which engages or disengages the A/C compressor clutch.
CMP Actuator	Activates the CMP Actuator. Commands the desired CMP from 0-25 degrees in 5 degree increments. The commanded states include Increase and Decrease. The normal state is NONE. The system remains in the commanded state until cancelled by the tool.
CMP Actuator Solenoid	Activates the CMP Actuator. The commanded states include ON and OFF. The normal state is NONE. The system remains in the commanded state until cancelled by the tool.
Crankshaft Pos. Variation Learn	This output control is used to activate the crankshaft position variation learn (CASE) algorithm which calculates the reference pulse correction factors for the misfire diagnostic.
Cylinder Power Balance	Enables/disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met: All the instructions on the scan tool have been completed. The engine speed has stabilized. The fuel injector has been selected. When DISABLE is selected, the control module turns the injector OFF for 30 seconds.
Engine Controls Ignition Relay	Activates the Engine Controls Ignition Relay. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the tool.
Engine Speed Control	Activates the throttle activation control (TAC) system to change engine RPM. The normal commanded state is None. To enable the RPM control, all instruction on the scan tool must be completed. The system will increase or decrease the RPM within a range of 500-1,950 RPM. The set step value changes the RPM by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the scan tool.
EVAP Purge/Seal	Simultaneously activates the purge solenoid in 10 percent increments from 0 to 100 percent and the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
EVAP Purge Solenoid	Activates the purge solenoid in 10 percent increments from 0 to 100 percent. The device control will be aborted and inhibited if the fuel tank pressure (FTP) sensor exceeds -22 mm Hg (-11 in H2O).
EVAP Service Bay Test	Activates the on-board EVAP diagnostic test.
EVAP Vent Solenoid	Activates the vent solenoid. The device control will be aborted and inhibited if the FTP sensor exceeds -22 mm Hg (-11 in H2O).
Fan Relay 1	The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning both low speed fans ON and OFF.
Fan Relay 2 & 3	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate the cooling fan series/parallel relay and the cooling fan 2 relay. The RH cooling fan 2 turns ON and OFF in high speed.
Fan Relays 1, 2, & 3	The scan tool displays a commanded state of OFF or ON. This allows you to activate or deactivate all of the cooling fan relays. Both cooling fans turn ON and OFF in high speed.
Fuel Composition Reset	IMPORTANT: Do not use this output control unless the actual alcohol content of the fuel in the tank is 10 percent or less. This will reset the learned alcohol composition to 0 percent in the engine control module (ECM).
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: All instruction on the scan tool completed. Fuel injector selected Key ON, engine OFF The selected fuel injector can only be flowed/pulsed once per ignition cycle.
Fuel Pump Relay	Activates the fuel pump relay for 2 seconds. Also turns fuel pump ON and OFF while engine is running.
Fuel Trim Enable	Disables the ECM ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool.
Fuel Trim Reset	Activates the reset of fuel trim data in all fuel trim cells.
GEN L-Terminal	The commanded states are ON and OFF. Selecting OFF commands the ECM to turn OFF the generator and stop generating an output voltage.
HO2S Heater Learn	This output control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine off time, typically 12 or more hours.
HO2S Heater Sensor 1	Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature.
HO2S Heater Sensor 2	Commands the heated oxygen sensor (HO2S) heater from 0-100 percent in 10 percent increments. The normal state is NONE. The system remains in the commanded state until cancelled by the tool or the heaters exceed a maximum temperature.
Idle Learn Reset	This output control is used to reset the learned airflow adaptive values to their initial values.
Idle Spark	Disables and enables idle spark advance with the engine running.
Loop Status	Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool.
Malfunction Indicator Lamp	Activates the malfunction indicator lamp (MIL). The commanded states include ON and OFF. The normal state is NONE. The MIL will remain illuminated until cancelled by the scan tool.
Misfire Graphic	Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph.
Oil Life Reset	The engine oil remaining life is determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This output control may be used to reset the engine oil remaining life.
RVS Disable History Reset	This output control is used to trigger the reset of the last 8 reasons the ECM has disabled remote vehicle start (RVS).
Spark Retard	Controls the amount of spark retard. The scan tool will command an increase or decrease in the amount of spark retard in 1 degree increments, within a range of 1-10 degrees. The normal commanded state is none.
Starter Relay	This output control is used to override the state of the Starter Relay output. Fuel and spark are disabled to prevent the engine from starting if the starter relay output is commanded ON.
Throttle Position	Operates TAC motor in from 0-100 percent in 10 percent increments to open or close the throttle blade. The test operates during key ON, engine OFF.
Throttle Sweep	This function moves the Throttle plate slowly from a closed position to wide open position, aiding diagnosis of TAC motor.

IMPORTANT
Do not use this output control unless the actual alcohol content of the fuel in the tank is 10 percent or less. This will reset the learned alcohol composition to 0 percent in the engine control module (ECM).

Engine Control Module Scan Tool Output Controls

Heating, Ventilation and Air Conditioning Control Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions : Engine ON
A/C Head Pressure	Normal	The scan tool displays Normal or Out of Range.
A/C LED	Varies	The scan tool displays On or Off. This is the current state of the A/C indicator LED.
A/C Request	No	The scan tool displays Yes or No. Yes is displayed if the air conditioning is requested.
Ambient Air Temperature	Normal	The scan tool displays Normal or Out of Range.
Ambient Air Temp. Sensor	Varies	The scan tool displays °C (°F). This is the outside air temperature.
Battery Voltage	Normal	The scan tool displays Normal or Out of Range.
Blower Motor Speed Command	Varies	The scan tool displays 0-100 percent. This is the numeric value in percent of the blower motor speed as commanded by the HVAC module.
Blower Speed	Normal	The scan tool displays Normal or Off.
Coolant Temperature	Varies	This displays °C (°F). This is the current temperature of the engine coolant.
Driver Heated Seat Switch	Inactive	The scan tool displays Inactive or Active. This is the current state of the driver heated seat switch.
Driver Temp. Dr. Motor Command	Varies	This displays counts. This is the numeric value of the driver temperature door commanded by the HVAC module.
Driver Temp. Dr. Position	Varies	This displays counts. This is the current value of the driver temperature door as monitored by the HVAC module.
Engine Coolant Temp	Normal	The scan tool displays Normal or Out of Range.
Engine Running	Yes	The scan tool displays Yes or No.
Mode Dr. Motor Command	Varies	This displays counts. This is the numeric value of the mode door commanded by the HVAC module.
Mode Door Position	Varies	This displays counts. This is the current value of the mode door as monitored by the HVAC module.
Mode Select Position	Varies	The scan tool displays Invalid, Auto, Panel, Bi-Level, Heater, Htr./Def., or Defrost. This is the current position of the mode select switch.
Outside Air LED	Off	The scan tool displays On or Off. This is the current state of the outside air indicator LED.
Outside Air Temp.	Varies	This displays °C (°F). This is the raw value of the outside air temperature.
Passenger Heated Seat Switch	Inactive	The scan tool displays Inactive or Active. This is the current state of the passenger heated seat switch.
Psgr. Temp. Dr. Motor Command	Varies	This displays counts. This is the numeric value of the passenger temperature door commanded by the HVAC module.
Psgr. Temp. Dr. Position	Varies	This displays counts. This is the current value of the passenger temperature door as monitored by the HVAC module.
Rear Defrost LED	Varies	The scan tool displays On or Off. This is the current state of the rear defrost indicator LED.
Rear Defrost State	Off	The scan tool displays On or Off. This is the current state of the rear defroster.
Recirculation Dr. Motor Command	Varies	This displays counts. This is the numeric value of the recirculation door commanded by the HVAC module.
Recirculation Dr. Position	Varies	This displays counts. This is the current value of the recirculation door as monitored by the HVAC module.
Recirculation LED	Varies	The scan tool displays On or Off. This is the current state of the recirculation mode indicator LED.
Temperature Dr. Motor Command	Varies	This displays counts. This is the numeric value of the temperature door commanded by the HVAC module.
Temperature Dr. Position	Varies	This displays counts. This is the current value of the temperature door as monitored by the HVAC module.
Vehicle Speed	Varies	This displays the current vehicle speed in MPH.

HVAC Control Module Scan Tool Data Parameters

Scan Tool Output Control	Description
A/C LED	This command allows you to turn the A/C LED On and Off.
A/C Request	This command allows you to turn the A/C relay On and Off. When the A/C relay is commanded On, the A/C compressor clutch should be engaged.
Air Inlet Door Position	The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.
All Status LEDs	This command allows you to turn the all HVAC status LEDs On and Off.
Blower Motor	The scan tool displays Off or On selections. This function allows you to command the blower motor to its maximum or minimum speeds.
Driver Heated Seat LED	This command allows you to turn the driver heated seat LED On and Off.
Left Temp. Door Position	The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.
Mode Door Position	The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.
Psgr. Heated Seat LED	This command allows you to turn the passenger heated seat LED On and Off.
Rear Defog LED	This command allows you to turn the rear defog LED On and Off.
Recalibrate All Motors	When ON is selected, all air temp and mode actuators have the capability to perform a recalibration.
Recirc. LED	This command allows you to turn the recirculation LED On and Off.
Right Temp. Door Position	The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.

HVAC Control Module Scan Tool Output Controls

Inflatable Restraint Passenger Presence System Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions : Ignition ON
Battery Voltage Signal	Varies	The scan tool displays 0-20 volts. This is the system voltage measured by the PPS between the battery input and ground.
Passenger Classification	Empty	The scan tool displays Unknown, Calibrating, Empty Seat, Small 1, Small 2, Large or Re-Zero. The scan tool displays the calculated seat occupant status or need to re-zero.
Passenger Status	No Info	The scan tool displays No Info., Valid, Invalid Class., Invalid Pos., Invalid Data or Inval. Class & Pos. The scan tool displays the calculated seat occupant status including relationship to seat position.
Power Mode	Run	The scan tool displays Off, Accessory, Run or Crank Request. The scan tool displays the current vehicle power mode.
PPS Enable Status	Enabled	The scan tool displays Disabled or Enabled. The scan tool displays the current status of the PPS system. This information is sent to the SDM for deactivation of the deployment loops related to the passenger airbags. PPS Enable Status and SDM Enable status should match.
PPS Fault Status	No Fault	The scan tool displays No Fault, Plant Mode, Fault, Mismatch or Test Enable. The scan tool displays the current condition of the PPS system to determine if the SDM or PPS is causing the PPS Disabled condition.
PPS Primary Key	Varies	The scan tool displays primary key that the PPS has stored to memory.
Pressure Sensor	Varies	The scan tool displays the voltage determined by the weight/position of the seat occupant.
Primary Key Status	Valid	The scan tool displays Unknown, Valid or Invalid. The scan tool displays the status of the primary key based on the comparison between the SDM and the PPS. If the Status is other than Valid the PPS will not allow activation and should set a DTC.
Received Primary Key	Varies	The scan tool displays what the PPS received from the BCM as the primary key. The PPS then compares it to what it has stored to determine the Primary Key Status. The PPS Primary Key and Received Primary Key should match.
Seat Belt Tension Sensor	Varies	The scan tool displays voltage which is used to determine whether a child infant seat is mounted in the passenger seat or not.
SDM Enable Status	Enabled	The scan tool displays the current status of the PPS system within the SDM. When disabled, SDM will default to deactivate the deployment loops related to the passenger airbags. PPS Fault Status and SDM Fault status should match.

Passenger Presence System Scan Tool Data Parameters

Inflatable Restraint Sensing and Diagnostic Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions : Ignition ON
Active Switch	Enabled	The scan tool displays Enabled or Disabled. This is the state of the SIR active switch.
Active Switch	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR learned the active switch.
Battery Voltage Signal	Varies	The scan tool displays 0-20 volts. This is the system voltage measured by the SDM between the battery input and ground.
Deployment Loop 1-12	Enabled	The scan tool displays Enabled or Disabled. This is the state of the SIR loop.
Deployment Loop 1-12	Learned	The scan tool displays Learned or Not Learned. Learned is displayed if the SIR has that number loop learned.
Driver Seat Belt Switch	Unbuckled	The scan tool displays Buckled or Unbuckled. This is the state of the driver seat belt.
Driver Seat Belt Type	Varies	The scan tool displays Switch or Sensor. The scan tool displays whether the driver seat uses a switch or a sensor for the seat belt buckle.
Driver Seat Position Sensor	Enabled	The scan tool displays Enabled or Disabled. This is the state of the driver seat position sensor.
Driver Seat Position Sensor	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR learned the driver seat position sensor.
Driver Seat Position Sensor	Varies	The scan tool displays whether the driver seat is in the Forward or Rearward position to determine if the airbag should activate single or dual stage deployment as necessary.
Impact Sensor 1-6	Enabled	The scan tool displays Enabled or Disabled. This is the state of the sensor.
Impact Sensor 1-6	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR has that sensor learned.
Loop 1-12 Type	Varies	The scan tool displays Not Used, LF Stage 1, RF Stage 1, LF Stage 2, RF Stage 2, LF Preten., RF Preten., LF Side Bag, RF Side Bag, Lt. Roof Stage1, Rt. Roof Stage1, Lt. Roof Stage2, Rt. Roof Stage2, Lt. Roof Stage3 or Rt. Roof Stage3. This is the type of loop.
Passenger Seat Belt Switch	Unbuckled	The scan tool displays Buckled or Unbuckled. This is the state of the passenger seat belt.
PPS Options	Varies	The scan tool displays Not Present, Manual, Auto or Auto. + Man. This is the current enabled option of the passenger presence system.
PPS Status	Enabled	The scan tool displays Enabled or Disabled. This is the state of the passenger presence system.
PPS Status	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR has learned the passenger presence system.
Primary Key Status	Valid	The scan tool displays Unknown, Valid or Invalid. The scan tool displays the status of the primary key based on the comparison between the BCM and the SDM. If the Status is other than Valid the SDM will not allow activation and should set a DTC.
Psgr. Seat Belt Sensor	Enabled	The scan tool displays Enabled or Disabled. This is the state of the passenger seat belt sensor.
Psgr. Seat Belt Sensor	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR learned the passenger seat belt sensor.
Psgr. Seat Belt Sensor	Varies	This displays mA. This is the amount of current supplied to the passenger seat belt sensor.
Psgr. Seat Belt Type	Varies	The scan tool displays Switch or Sensor. The scan tool displays whether the passenger seat uses a switch or a sensor for the seat belt buckle.
Psgr. Seat Position Sensor	Enabled	The scan tool displays Enabled or Disabled. This is the state of the passenger seat position sensor.
Psgr. Seat Position Sensor	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR learned the passenger seat position sensor.
Psgr. Seat Position Sensor	Inactive	The scan tool displays Rearward or Forward. The scan tool displays whether the passenger seat is in the Forward or Rearward position to determine if the airbag should activate single or dual stage deployment as necessary.
Received Primary Key	Varies	The scan tool displays what the SDM received from the BCM as the primary key. The SDM then compares it to what it has stored to determine the Primary Key Status. The SDM Primary Key and Received Primary Key should match.
Received VIN Digits 2-5	Varies	The scan tool displays the Secondary Key which includes digits 2 though 5 of the VIN that the BCM sends to the SDM.
Received VIN Digits 6-7	Varies	The scan tool displays the Secondary Key which includes digits 6 and 7 of the VIN that the BCM sends to the SDM.
Rollover Sensor	Enabled	The scan tool displays Enabled or Disabled. This is the state of the rollover sensor.
Rollover Sensor	Learned	The scan tool displays Learned or Unlearned. Learned is displayed if the SIR learned the rollover sensor.
Run/Crank	Active	This displays volts. This is the current power mode of the SDM.
Secondary Key Status	Valid	The scan tool displays Unknown, Valid or Invalid. This determines if the VIN stored in SDM memory matches what is stored in the BCM.
Sensor 1-6 Type	Varies	The scan tool displays Not Used, EFS LF, EFS Center, EFS RF, SIS Left Row 1, SIS Right Row 1, SIS Left Row 2 or SIS Right Row 2. This is the type of SIR sensor.
SDM Primary Key	Varies	The scan tool displays the primary key that the SDM has stored to memory.
SIR Warning Indicator	Off	The scan tool displays On or Off. This is the status of the SIR warning indicator.

Supplemental Inflatable Restraint Scan Tool Data Parameters

Scan Tool Output Control	Description
Setup New SDM	This output control is used to set up a new SDM.
Setup SDM Primary Key in BCM	This output control is used to set up a new SDM primary key in the BCM.

Supplemental Inflatable Restraint Scan Tool Output Controls

Instrument Cluster Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Ignition ON
Battery Voltage	Varies	This displays volts. The scan tool displays the system voltage of the vehicle.
Brake Fluid	OK	The scan tool displays OK or Low. This is the state of the brake fluid level.
Brake Fluid Switch	Varies	This displays volts. This is the voltage status of the brake fluid switch.
DIC Fuel Info.	Inactive	The scan tool displays Active or Inactive. This is the state of the DIC Fuel Info. switch.
DIC Information Switch	Inactive	The scan tool displays Active or Inactive. This is the state of the DIC Information switch.
DIC Personalization	Off	The scan tool displays Active or Inactive. This is the status of the driver information center (DIC) personalization functions as monitored by the IPC.
Heated Washer Fluid Ind. Signal	Inactive	The scan tool displays Active or Inactive. This is the status of the heated washer fluid indicator signal as monitored by the IPC.
Ignition 1 Input	Active	The scan tool displays Active or Inactive. This is the state of the Ignition 1 input to the IPC.
Ignition Cycle Counter	Varies	The scan tool displays counts. This is the number of times the ignition has been cycled from the OFF to ON position.
Passenger Seatbelt Indicator Commanded	Off	This displays On or Off. This is the state of the seatbelt indicator command as monitored by the IPC.
Passenger Seatbelt Indicator Status	Off	This displays On or Off. This is the status of the seatbelt indicator status as monitored by the IPC.
Trip Reset Switch	Inactive	The scan tool displays Active or Inactive. This is the state of the trip reset switch.
Washer Fluid Level	OK	The scan tool displays OK or Low. This is the state of the washer fluid level.

Instrument Panel Cluster Scan Tool Data Parameters

Scan Tool Output Control	Description
Dimming	The IPC increases or decreases the dimming intensity in increments of 20 percent between a range of 0-100 percent.
Display Test	The IPC illuminates all of the indicators for 7 seconds when you select ON.
Display(s) Test	The instrument panel cluster (IPC) drives all of the gauges at or below minimum for a few seconds when you select ON, then drives all of the gauges at or above maximum for a few seconds. The IPC Display Test will end after one cycle of the gauges sweep.

Instrument Panel Cluster Scan Tool Output Controls

Radio Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions : Ignition ON
Antenna Module	Enabled	This scan tool displays Enabled or Disabled. This is the state of the antenna module.
Auxiliary Audio Input	Present	The scan tool displays Present or Not Present. This is the state of the auxiliary audio input.
DRR	Present	The scan tool displays Present or Not Present. This is indicates if the digital radio receiver present.
Ign. Cycles Since last DTC	Varies	The scan tool displays the number of ignition cycles since the last DTC.
Phone Signal	Present	The scan tool displays Present or Not Present. This is the state of the phone signal.
Power Mode	Run	The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch.
Power Mode Config.	Normal Mode	The scan tool displays Bench Mode or Normal Mode. This is the configuration of the power mode.
Signal Strength	Varies	This displays dBuV. This is the signal strength of the radio.
Theft Armed	Learned VIN	The scan tool displays Learned VIN or No VIN. The Scan tool displays Learned VIN when the theft mode has been turned ON by recognizing a valid VIN.
Theft Lock Status	Inactive	The scan tool displays Active or Inactive. This is the state of the theft lock system.
Video Display	Varies	The scan tool displays Present or Not Present. This is the state of the video display.

Radio Scan Tool Data Parameters

Scan Tool Output Control	Description
Left Front Speaker	Commanding the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF enables all speakers.
Left Rear Speaker	Commanding the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF enables all speakers.
Right Front Speaker	Commanding the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF enables all speakers.
Right Rear Speaker	Commanding the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF enables all speakers.

Radio Scan Tool Output Controls

Remote Control Door Lock Receiver Scan Tool Information

Parameter	Expected Value	Description
Operating Conditions: Ignition ON
Battery Voltage Signal	Varies	The scan tool displays the current system battery voltage.
Fob 1-4 Battery	OK	The scan tool displays OK or Low. This is the state of the indicated fob battery.
Fob 1-4 Function	None	The scan tool displays None, Lock, Dr Door Unlock, All Door Unlock, R Closure Rel., Lt Sliding Ctrl., Rt Sliding Ctrl., Panic, Fuel Door, Power Window, Power Top, Engine Start, Engine Stop, Fob Program, Locate, R Closure Close, R Closure Open, R Closure Stop, Double Lock, R Closure Start or Lt Sliding Stop. The scan tool indicates the last keyless entry function received by the keyless entry transmitter programmed to the indicated slot number.
Fob 1-4 Programmed	Yes	The scan tool displays Yes or No. Yes is displayed if a fob has been programmed to the indicated slot number.
Front Placard	Varies	This displays Counts.
Last Fob Used	Varies	The scan tool displays None, Fob 1, Fob 2, Fob 3, Fob 4 or Fob 5. This was the last Fob used, as monitored by the RCDLR.
Last Key Pressed On Fob	Varies	The scan tool displays Unlock, Lock, Panic, remote Start, Rear Closure, Left Slide Door, Right Slide Door, Learn, or No Key Press. The scan tool indicates the last keyless entry function received by a valid keyless entry transmitter.
Learn in Progress	No	The scan tool displays Yes or No. Yes is displayed when the TPM system is in learn mode.
LF Pressure Sensor Mode	Stationary	The scan tool displays Off, Learn, Re-measure, Drive, Stationary, or Wakeup. This is the state of the left front pressure sensor.
LF Pressure Status	Normal	The scan tool displays Unknown, Normal, Low, Flat or High. This is the state of the left front tire pressure.
LF Tire Press. Sensor Status	Normal	The scan tool displays Normal or Failed. This is the state of the left front tire pressure sensor.
LF Tire Pressure Sensor Battery Status	OK	The scan tool displays OK or Low. This is the condition of the left front tire pressure sensor battery.
LF Tire Pressure	Varies	This displays kPa (psi). This is the amount of pressure in the left front tire.
LR Pressure Sensor Mode	Stationary	The scan tool displays Off, Learn, Re-measure, Drive, Stationary, or Wakeup. This is the state of the left rear pressure sensor.
LR Pressure Status	Normal	The scan tool displays Unknown, Normal, Low, Flat or High. This is the state of the left rear tire pressure.
LR Tire Press. Sensor Status	Normal	The scan tool displays Normal or Failed. This is the state of the left rear tire pressure sensor.
LR Tire Pressure Sensor Battery Status	OK	The scan tool displays OK or Low. This is the condition of the left rear tire pressure sensor battery.
LR Tire Pressure	Varies	This displays kPa (psi). This is the amount of pressure in the left rear tire.
Rear Placard	Varies	This displays Counts.
RF Pressure Sensor Mode	Stationary	The scan tool displays Off, Learn, Re-measure, Drive, Stationary, or Wakeup. This is the state of the right front pressure sensor.
RF Pressure Status	Normal	The scan tool displays Unknown, Normal, Low, Flat or High. This is the state of the right front tire pressure.
RF Tire Press. Sensor Status	Normal	The scan tool displays Normal or Failed. This is the state of the right front tire pressure sensor.
RF Tire Pressure Sensor Battery Status	OK	The scan tool displays OK or Low. This is the condition of the right front tire pressure sensor battery.
RF Tire Pressure	Varies	This displays kPa (psi). This is the amount of pressure in the right front tire.
RR Pressure Sensor Mode	Stationary	The scan tool displays Off, Learn, Re-measure, Drive, Stationary, or Wakeup. This is the state of the right rear pressure sensor.
RR Pressure Status	Normal	The scan tool displays Unknown, Normal, Low, Flat or High. This is the state of the right rear tire pressure.
RR Tire Press. Sensor Status	Normal	The scan tool displays Normal or Failed. This is the state of the right rear tire pressure sensor.
RR Tire Pressure Sensor Battery Status	OK	The scan tool displays OK or Low. This is the condition of the right rear tire pressure sensor battery.
RR Tire Pressure	Varies	This displays kPa (psi). This is the amount of pressure in the right rear tire.
Selected Front Tire Type	Varies	The scan tool displays N/A, P-Metric (S), P-Metric (X), Load Range C, Load Range D or Load Range E. This indicates the type of front tires that were last selected for the vehicle.
Selected Rear Tire Type	Varies	The scan tool displays N/A, P-Metric (S), P-Metric (X), Load Range C, Load Range D or Load Range E. This indicates the type of rear tires that were last selected for the vehicle.
TPM Indicator/Message	Off	The scan tool displays Off or On. This indicates if the TPM system has requested a warning message or indicator lamp to be activated.
TPM System Enabled	Yes	The scan tool displays Yes or No. Yes is displayed if the TPM system is enabled.

Remote Control Door Lock Receiver Scan Tool Data Parameters

Output Control	Description
Key Fob Button Test	The RCDLR monitors the incoming RF communications to ensure all keyless entry transmitter functions are operating properly.

Remote Control Door Lock Receiver Scan Tool Output Controls

Theft Deterrent Module Scan Tool Information

Parameter	Expected Value	Definition
Operating Conditions: Ignition ON
Auto Learn Counter	Varies	This displays Counts. This is the number of times the auto learn procedure was carried out by the TDM.
Auto. Learn Timer	Varies	This displays minutes. This is the amount of minutes the TDM took to auto learn.
Battery Reconnect	No	The scan tool displays Yes or No. Yes is displayed if the battery was recently reconnected.
Fleet Vehicle	No	The scan tool displays Yes or No. Yes is displayed if the vehicle is a fleet vehicle.
Fuel Continue	No	The scan tool displays Yes or No.
Fuel Disable Ignition Off	Yes	The scan tool displays Yes or No. Yes is displayed if the fuel is disabled during ignition OFF.
Fuel Disable Timeout	No	The scan tool displays Yes or No. Yes is displayed if the fuel disable timed out.
Ignition Voltage Signal	Present	The scan tool displays Present or Not Present. Present is displayed if there is an ignition voltage signal to the TDM.
Immobilization	Inactive	The scan tool displays Active or Inactive. This is the state of the immobilizer system.
Immobilizer Programmed	Yes	The scan tool displays Yes or No. This is the state of the immobilizer system programming.
Incorrect VIN 1	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 2	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 3	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 4	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 5	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 6	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 7	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 8	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 9	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Incorrect VIN 10	No Error	The scan tool displays Unknown, No Error, ECM/PCM, TCM, EBCM, DSCC, TBCM, ESCM, ASCM, BCM, BCM Aux., SDM, PPS, ROS, PIDM, IPC, DIC, HUD, Chime, Radio, Amp., CDX, RSA, DRR, Onstar, HVAC, RCC, DDM, PDM, LRDM, RRDM, LGM, PSDM, MSM, HVSM, RCDLR, SOD, TDM or SCLM. The module displayed has an incorrect VIN programmed into that module.
Learn Coded Key	No	The scan tool displays Yes or No.
Master Keys Learned	Varies	This displays Counts. This is the number of master keys learned by the TDM.
PCM Authentication Status	Valid	The scan tool displays Unknown, Incorrect, Negative or Valid. This is the state of the PCM authentication.
PCM Auto. Learn Timer	Inactive	The scan tool displays Active or Inactive. This is the current state of the ECM auto learn timer.
PCM Password Learning	Enabled	The scan tool displays Enabled or Disabled. This is the state of the password learning in the ECM.
PCM Release Status	Release	The scan tool displays Unknown, Post Release, Pre-Release or Release. This is the release status of the ECM.
Power Mode	Run	The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch.
Powertrain DTC	No	The scan tool displays Yes or No. Yes is displayed if there is a powertrain DTC stored in the ECM or TCM.
Previous TDM State	Varies	The scan tool displays Asleep, Wakeup, Normal, Learn Passkey, Tamper, Monitor Key, Fail Pending, Fail Enabled, Lrn Keys Stdby, Learn More Keys, Learn Pending, Auto Learn, Auto. Lrn. Done, No Coded Key, Check Second Key, VIN Check, OnStar, Bypass, Override or VIN Timer. This was the last state of the TDM.
Security Code Programmed	No	The scan tool displays Yes or No. Yes is displayed if a security code is programmed.
Start Disabled	No	The scan tool displays Yes or No. Yes is displayed if the starter is disabled.
Substitution Detection Status	Pass	The scan tool displays Pass or Fail. Pass is displayed if the TDM does not sense a module with incorrect VIN programming.
Tamper Status	Inactive	The scan tool displays Active or Inactive. This is the state of the tamper system.
TDM State	Varies	The scan tool displays Asleep, Wakeup, Normal, Learn Passkey, Tamper, Monitor Key, Fail Pending, Fail Enabled, Lrn Keys Stdby, Learn More Keys, Learn Pending, Auto Learn, Auto. Lrn. Done, No Coded Key, Check Second Key, VIN Check, OnStar, Bypass, Override, or VIN Timer. This was the last state of the TDM.
Telltale Status	Off	The scan tool displays On, Off, Flash or Invalid. This is the state of the security indicator.
Theft Problem	No	The scan tool displays Yes or No. Yes is displayed if there is a theft problem.
Total Keys Learned	Varies	This displays Counts. This is the number of total keys learned by the TDM.
Transponder Key	Present	The scan tool displays Present or Not Present. Present is displayed when a transponder is present. This does not mean that this is a valid or learned transponder, but only that a transponder is present.
Valid Key	Yes	The scan tool displays Yes or No. Yes is displayed if a valid key was used as monitored by the TDM.
Valid VIN	Yes	The scan tool displays Yes or No. Yes is displayed if the VIN is valid.
VIN Learned	Yes	The scan tool displays Yes or No. Yes is displayed if the VIN was learned.
VIN Message Received	Yes	The scan tool displays Yes or No. Yes is displayed if the VIN message is received

Theft Deterrent Module Scan Tool Data Parameters

Transmission Control Module Scan Tool Information (4T65-E)

The Transmission Control Module Scan Tool Information contains all transmission 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.

The values below represent a typical display recorded from a properly functioning system.

IMPORTANT

Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used/referenced in this manual for diagnosis. If a scan tool displays other parameters, those values are not recommended by General Motors for use in diagnosis.

If all values are within the expected range described below, refer to Symptoms - Automatic Transmission for diagnosis.

The scan tool values from a properly functioning transmission may be used for comparison with the transmission you are diagnosing. The values below represent a typical display recorded from a properly functioning system.

Parameter	Expected Value	Description
Operating Conditions: Engine at idle, upper radiator hose hot, closed throttle, transmission in PARK, closed loop operation, accessories OFF, brake pedal not applied.
1-2 Shift Error	Seconds, Varies	This parameter displays the difference between the desired 1-2 shift time and the actual 1-2 shift time. A positive number indicates a firm or fast shift, the actual shift time was shorter than the desired shift time. A negative number indicates a soft or slow shift, the actual shift time was longer than the desired shift time. This value is only accurate if the shift was adaptable.
1-2 Shift Time	Seconds, Varies	This parameter displays the actual time of the last 1-2 shift. The shift time is based on the engine RPM drop after the commanded 1-2 shift. This value is only accurate if the shift was adaptable.
1-2 Sol.	On	This parameter displays the commanded state of the 1-2 shift solenoid valve. When the transmission is in FIRST and FOURTH gear, the display should indicate ON, current is flowing trough the solenoid. When the transmission is in SECOND and THIRD gear, the display should indicate OFF, current is not flowing through the solenoid.
1-2 Sol. CKT Status	Indeterminate	This parameter displays the solenoid valve feedback voltage signal circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present the scan tool will display OK.
1-2 TAP Cell (4-16)	KPa/psi, Varies	This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 N.m (12.5 lb ft) of engine torque increment per cell, added to or subtracted from shift pressure during a 1-2 upshift. A positive number indicates that long shifts have been detected and PC solenoid pressure has been added in order to decrease shift time. A negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted in order to increase shift time.
2-3 Shift Error	Seconds, Varies	This parameter displays the difference between the desired 2-3 shift time and the actual 2-3 shift time. A positive number indicates a firm or fast shift, the actual shift time was shorter than the desired shift time. A negative number indicates a soft or slow shift, the actual shift time was longer than the desired shift time. This value is only accurate if the shift was adaptable.
2-3 Shift Time	Seconds, Varies	This parameter displays the actual time of the last adaptable 2-3 shift. The shift time is based on the gear ratio change after the commanded 2-3 shift.
2-3 Sol.	On	This parameter displays the commanded state of the 2-3 shift solenoid valve. When the transmission is in FIRST and SECOND gear, the display should indicate ON, current is not flowing trough the solenoid. When the transmission is in THIRD and FOURTH gear, the display should indicate OFF, current is flowing through the solenoid.
2-3 Sol. CKT Status	Indeterminate	This parameter displays the solenoid valve feedback voltage signal circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present the scan tool will display OK.
2-3 TAP Cell (4-16)	KPa/psi, Varies	This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 N.m (12.5 lb ft) of engine torque increment per cell, added to or subtracted from shift pressure during a 2-3 upshift. A positive number indicates that long shifts have been detected and PC solenoid pressure has been added in order to decrease shift time. A negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted in order to increase shift time.
3-4 Shift Error	Seconds, Varies	This parameter displays the difference between the desired 3-4 shift time and the actual 3-4 shift time. A positive number indicates a firm or fast shift, the actual shift time was shorter than the desired shift time. A negative number indicates a soft or slow shift, the actual shift time was longer than the desired shift time. This value is only accurate if the shift was adaptable.
3-4 Shift Time	Seconds, Varies	This parameter displays the actual time of the last adaptable 3-4 shift. The shift time is based on the gear ratio change after the commanded 3-4 shift.
3-4 TAP Cell (4-16)	KPa/psi, Varies	This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 N.m (12.5 lb ft) of engine torque increment per cell, added to or subtracted from shift pressure during a 3-4 upshift. A positive number indicates that long shifts have been detected and PC solenoid pressure has been added in order to decrease shift time. A negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted in order to increase shift time.
Brake Switch	Released	This parameter displays the status of the brake switch circuit input. Applied indicates a zero voltage input, brake pedal applied. Released indicates a voltage input, brake pedal released. The scan tool displays Applied or Released.
Calc. Throttle Position	%, 0	This parameter displays a calculated value, which is determined by the accelerator pedal position and the actual throttle position, used to optimize transmission controls. It represents the driver's intended request for torque or acceleration. The range is 0-100 percent, where 0 percent represents an idle or coast request and 100 percent represents a request for wide open throttle (WOT).
Commanded Gear	1	This parameter displays the current commanded state of the shift solenoid valves. The scan tool displays 1, 2, 3, 4 or 5.
Current TAP Cell	4-16, Varies	This parameter displays the current transmission adaptive pressure (TAP) cell in use for transmission line pressure adaptation. The cells are based on 17 N.m (12.5 lb ft) of engine torque. The higher the engine torque, the higher the current TAP cell. The last cell used will remain displayed until the next adaptable upshift occurs.
ECT	°C (°F), Varies	This parameter displays the input signal from the engine coolant temperature (ECT) sensor. ECT is high at 151°C (304°F) when the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F) when the signal voltage is high, 5 volt.
Engine Speed	RPM, 600-850 RPM	This parameter displays the rotational speed of the engine expressed as revolutions per minute (RPM).
Engine Torque	N.m (lb ft), Varies	This parameter displays a calculated value based on engine load, throttle position, mass air flow, and other engine inputs. This parameter is accurate to within 20 N.m (15 ft lb) of actual measured engine torque.
Gear Ratio	Ratio, 3.98	This parameter displays the actual transmission gear ratio. The scan tool displays the gear ratio calculated from the automatic transmission input shaft speed sensor (AT ISS) and the automatic transmission output shaft speed sensor (AT OSS) inputs.
Ignition Voltage	Volts, 12.5-14.5 Volts	This parameter displays the system voltage measured at the ignition feed.
IMS	PARK	This parameter displays PARK, PARK/REVERSE, REVERSE, REVERSE/NEUTRAL, NEUTRAL, NEUTRAL/DRIVE 4, DRIVE 4, DRIVE 4/DRIVE 3, DRIVE 3, DRIVE 3/DRIVE 2, DRIVE 2, DRIVE 2/DRIVE 1, DRIVE 1 or INVALID. The IMS Range display represents a decoded status of the four inputs from the IMS. The combination of IMS inputs are used to determine which position the manual valve is in at any time.
IMS A/B/C/P	LOW/HI/HI/LOW	This parameter displays the status of the four A/B/C/P inputs from the automatic transmission internal mode switch. HI indicates an ignition voltage signal. LOW indicates a 0 voltage signal. The scan tool will display HI/LOW, HI/LOW, HI/LOW, HI/LOW.
Last Shift Time	Seconds, Varies	This parameter displays the actual time of the last upshift. This value is only accurate if the shift was adaptable.
PC Sol. Actual Current	Amps, 0.95-1.05	This parameter displays the actual current flow through the pressure control solenoid circuit, which is measured by the control module. High current flow results in low line pressure. Low current flow results in high line pressure.
PC Sol. Duty Cycle	%, 45-55%	This parameter displays the commanded state of the pressure control solenoid, expressed as a percentage of energized ON time. A reading of low percent indicates zero ON time, non energized, or no current flow. A high percent at idle indicates maximum ON time, energized, or high current flow.
PC Sol. Ref. Current	Amps, 0.95-1.05	This parameter displays the commanded current of the pressure control solenoid circuit. High current results in low line pressure. Low current results in high line pressure.
Steady State TAP 1GR	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 1st gear. The larger the value, the greater the increase to line pressure.
Steady State TAP 2GR	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 2nd gear. The larger the value, the greater the increase to line pressure.
Steady State TAP 2GR/TCC	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 2nd gear with TCC applied. The larger the value, the greater the increase to line pressure.
Steady State TAP 3GR	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 3rd gear. The larger the value, the greater the increase to line pressure.
Steady State TAP 3GR/TCC	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 3rd gear with TCC applied. The larger the value, the greater the increase to line pressure.
Steady State TAP 4GR	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 4th gear. The larger the value, the greater the increase to line pressure.
Steady State TAP 4GR/TCC	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in 4th gear with TCC applied. The larger the value, the greater the increase to line pressure.
Steady State TAP Reverse	KPa/psi, Varies	This parameter displays a pressure modification which is added to the line pressure in Reverse gear. The larger the value, the greater the increase to line pressure.
TCC Duty Cycle	%, 0%	This parameter displays the commanded percentage of ON time for the TCC PWM solenoid. A high percentage represents an ON, energized, commanded state. Zero percent represents an OFF, non-energized, commanded state.
TCC Duty Cycle CKT Status	Indeterminate	This parameter displays the solenoid driver feedback voltage signal and displays the circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present the scan tool will display OK.
TCC Release Pressure	Yes	This parameter displays the status of the normally closed TCC release switch and displays YES or NO. When TCC release fluid pressure is present, the switch is open, indicating that the TCC is released. When the fluid pressure is not present, the switch is closed, indicating that the TCC is applied.
TCC Slip Speed	RPM, Varies	This parameter displays the difference between transmission output speed and engine speed. A negative value indicates the engine speed is less than the output speed, deceleration. A positive value indicates the engine speed is greater than the output speed, acceleration. A value of zero indicates the engine speed is equal to the output speed, TCC applied.
Traction Control	Inactive	This parameter displays Active or Inactive. When the powertrain control module (PCM) receives a request for torque reduction from the electronic brake traction control module (EBTCM), Active is displayed.
Trans. Fluid Temp.	°C (°F), Varies	This parameter displays the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high, 151°C (304°F), when signal voltage is low, 0 volt. Transmission fluid temperature is low, -40°C (-40°F), when signal voltage is high, 5 volt.
Transmission Hot Mode	Off	This parameter displays the automatic transmission fluid temperature (TFT) and displays On or Off. Off indicates that the TFT has not exceeded 130°C (266°F). On indicates that the TFT has exceeded 130°C (266°F) and has not cooled to 120°C (248°F) for greater that 5 seconds. These numbers are approximate and differ with transmissions.
Transmission ISS	RPM, 650-800 RPM	This parameter displays the rotational speed of the transmission input shaft. The scan tool displays input shaft speed as revolutions per minute (RPM).
Transmission OSS	RPM, 0 RPM	This parameter displays the rotational speed of the transmission output shaft. The scan tool displays output shaft speed as revolutions per minute (RPM).
Vehicle Speed	Km/h (mph), 0 km/h	This parameter displays the speed at which the vehicle is traveling. The scan tool displays vehicle speed as kilometers per hour (km/h), miles per hour (MPH). The vehicle speed is calculated based on the input signal from the vehicle speed sensor.

Scan Tool Data Parameters

Output Control	Description
1-2 Solenoid	The powertrain control module (PCM) commands the 1-2 shift solenoid valve ON and OFF. The scan tool 1-2 Sol. parameter should match the commanded state. The scan tool Commanded Gear parameter should correspond with the shift solenoid combination. Refer to Shift Solenoid Valve State and Gear Ratio . When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid remains ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the PCM. When the engine is running, the following control limits apply: Only sequential gear changes are allowed. For example, 1st to 3rd is not allowed. If a non-sequential gear change is attempted, the message "Non-sequential gear changes not allowed. Gear changes must be in order" appears on the scan tool display. The vehicle speed must be below a calibrated value. If the vehicle speed is too high, the message "Vehicle speed too high" appears on the scan tool display. The gear requested may not be greater than the current selected transmission range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2. If the gear requested is greater than the current selected transmission range, the message "Eng. running and gear request is greater than the current TR" appears on the scan tool display. The solenoid remains ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the PCM.
2-3 Solenoid	The PCM commands the 2-3 shift solenoid valve ON and OFF. The scan tool 2-3 Sol. parameter should match the commanded state. The scan tool Commanded Gear parameter should correspond with the shift solenoid combination. Refer to Shift Solenoid Valve State and Gear Ratio . When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid will remain ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the PCM. When the engine is running, the following control limits apply: Only sequential gear changes are allowed. For example, 1st to 3rd is not allowed. If a non-sequential gear change is attempted, the message "Non-sequential gear changes not allowed. Gear changes must be in order" appears on the scan tool display. The vehicle speed must be below a calibrated value. If the vehicle speed is too high, the message "Vehicle speed too high" appears on the scan tool display. The engine speed must be below a calibrated value. If the engine speed is too high, the message "Engine speed too high" appears on the scan tool display. Downshifts are allowed only when the vehicle speed is below a calibrated value. If the vehicle speed is too high, the message "Eng. is on and veh. speed too hi for 3-2 or 2-1 downshift" appears on the scan tool display. The gear requested may not be greater than the current selected transmission range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2. If the gear requested is greater than the current selected transmission range, the message "Eng. running and gear request is greater than the current TR" appears on the scan tool display. The solenoid remains ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the PCM.
Reset Transmission Adapts	The PCM clears, or resets, the transmission adapt pressure (TAP) cells to the original base value. There are no limits to using this output control. It may be performed with the engine running or when the ignition is ON, and the engine is OFF.
PC Solenoid	The PCM commands the amperage, current, to the pressure control solenoid valve in order to control transmission line pressure. As the amperage increases, the line pressure decreases. As the amperage decreases, the line pressure increases. The amperage range is 0.00-1.10 and may be commanded in 1/10 amp increments. When the ignition is ON, and the engine is OFF, the reference, commanded, amperage may be controlled within calibrated limits. The scan tool parameter "PC Sol. Ref. Current" changes, but the parameter "PC Sol. Actual Current" does not change. The reference current remains until commanded otherwise. When the engine is running, the following control limits apply: When the transmission range is PARK or NEUTRAL, the reference, commanded, amperage may be controlled within calibrated limits. The engine speed must be less than 1,500 RPM. If the engine speed is greater than 1,500 RPM, the message "TR in park/neutral and engine speed over 1,500 RPM" appears on the scan tool display. Both the scan tool parameters "PC Sol. Ref. Current" and "PC Sol. Actual Current" change. Both current readings remain until commanded otherwise. When the transmission range is not in PARK or NEUTRAL, the reference amperage can only be controlled less than the current determined by the PCM. The PCM does not allow a value to be selected that may cause damage to the transmission. If the requested amperage is more than allowed by the PCM, the message "Requested current for the PC Solenoid is too high" appears on the scan tool display. Transmission range DTCs must not be active. If a transmission range DTC is active, the message "Engine running with transmission DTC present" appears on the scan tool display.
Shift Transmission	The PCM commands upshifts and downshifts. The scan tool Commanded Gear parameter should correspond with the shift solenoid combination. Refer to Shift Solenoid Valve State and Gear Ratio . When the ignition is ON, and the engine is OFF, there are no limits to this control. The scan tool shift solenoid states change to match the Current Gear selected. When the engine is running, the following control limits apply: The PCM does not allow a shift if it causes the engine RPM to exceed a calibrated limit. If a gear is requested and the engine speed is too high, the message "Engine speed too high" appears on the scan tool display. The PCM does not allow a 3-2 or 2-1 downshift if the vehicle speed exceeds a calibrated limit. If either downshift is requested and the vehicle speed is too high, the message "Eng. is on and veh. speed too hi for 3-2 or 2-1 downshift" appears on the scan tool display. The PCM does not allow a 4-3 downshift if the vehicle speed exceeds a calibrated limit. If a 4-3 downshift is requested and the vehicle speed is too high, the message "Vehicle speed too high" appears on the scan tool display. The PCM does not allow an upshift if the vehicle speed exceeds a calibrated limit. If an upshift is requested and the vehicle speed is too high, the message "Vehicle speed too high" appears on the scan tool display. The PCM does not allow an upshift that is greater than the current selected transmission range (PRNDL). For example, 3rd gear is not allowed if the transmission range is D2. If an upshift is requested that is greater than the current selected transmission range, the message "Eng. running and gear request is greater than the current TR" appears on the scan tool display.
TCC Control Solenoid	The PCM commands the duty cycle of the TCC PWM solenoid valve. The duty cycle is represented by a percentage of ON energized time. Approximately 90-100 percent duty cycle represents an ON energized commanded state. zero percent represents an OFF non-energized commanded state. The scan tool TCC Duty Cycle parameter should match the commanded state. When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid remains ON, 90-100 percent duty cycle until commanded OFF, 0 percent duty cycle, and vice versa. When the output control is exited, the solenoid duty cycle is determined by the PCM. When the engine is running, the following control limits apply: If the transmission range is PARK, and the transmission is in hot mode, the torque converter clutch pulse width modulation (TCC PWM) solenoid valve may not be commanded OFF. If the solenoid is requested OFF, the message "TCC OFF command disabled in Hot Mode" appears on the scan tool display. The TCC PWM solenoid valve may not be commanded OFF for more than a calibrated amount of time. If the solenoid is commanded OFF, for a certain amount of time, the message "TCC OFF time has been exceeded" appears on the scan tool display.

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