GM Service Manual Online
For 1990-2009 cars only

Use the scan tool data display values and definitions information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data with the typical data display value table information. Use the information in order to aid in understanding the nature of the concern when the vehicle data does not match the typical data display values.

The scan tool data values were taken from a known good vehicle under the following conditions:

    • The ignition switch is in the Run position.
    • The engine is not running.
    • The vehicle is in PARK.

Parameter

Operating Conditions

Expected Value

Definition

Ignition is ON, engine OFF, and vehicle is stationary

ABS Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when doing a system check or fault occurs.

--

Off

Accessory Relay Command

Ignition is in ACC/RUN/CRANK position

On

The scan tool displays On or Off. This is the state of the accessory relay.

Ignition is in OFF position

Off

Acc./RAP Relay Commend

Acc./RAP relay switch activated

On

The scan tool displays On or Off. This is the state of the Acc./RAP relay.

Acc./RAP relay switch deactivate

Off

All Door Lock Command

All door lock switch activated

Active

The scan tool displays Active or Inactive. This is the state of the all door lock switch.

All door lock switch deactivated

Inactive

Alternator Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when a fault occurs.

--

Off

Ambient Light Sensor

--

4.6 Volts

The scan tool displays the ambient light level as detected by the sensor as a voltage.

Ambient Light Status

--

Night

The scan tool displays Night, Day, Unknown or Invalid. This is the state of the ambient light sensor.

--

Day

--

Unknown

--

Invalid

Anti Theft Warning System

Anti theft warning system activated

Armed

This parameter displays whether the anti theft system is Armed or Disarmed.

Anti theft warning system deactivated

Disarmed

ATWS LED (Anti-Theft Warn.)

--

On

The scan tool displays On, Fast Flash or Off. This is the current state of the ATWS indicator.

--

Fast Flash

--

Off

Auto Headlamp Disable Switch

Auto headlamp disable switch activated

Active

This parameter displays the status of the auto headlamp disable switch.

Auto headlamp disable switch deactivated

Inactive

Backup System Power Mode

Backup system power mode activated

Enable

This parameter displays the status of the backup system power mode

Backup system power mode deactivated

Disabled

Battery Current

--

- 4 Amps

The scan tool displays amperes. This numeric value is the battery amperage.

Battery Low at Start

Battery voltage below 11 Volts

Yes

The scan tool displays Yes if the  voltage is below  11 volts. Or No if the voltage is above 12  volts.

Battery voltage above 11 Volts

No

Battery Open Charge Voltage

--

12 Volts

This parameter displays the Voltage of the battery open charge.

Battery Open Circuit Tested

Battery circuit open

Yes

The scan tool will display Yes, if the battery has a open circuit.

Battery circuit closed

No

Battery Status Remote Key 1

--

Okay

The scan tool will display test the battery in the remote key to determine if it is Okay or Low if the voltage is low.

--

Low

Battery Status Remote Key 2

--

--

Battery Status Remote Key 3

--

--

Battery Status Remote Key 4

--

--

Battery Sulfation Mode

--

Active

This parameter displays if the regulated voltage has been low for some time the BCM will command a higher regulated voltage to prevent sulfation.

--

Inactive

Battery Voltage

--

12 Volts

The scan tool displays 0-14 Volts. The scan tool displays approximately 12 Volts when the ignition is on.

Battery Voltage High Resolution

--

12 Volts

The scan tool displays 0-14 Volts. The scan tool displays approximately 12 Volts when the ignition is on.

Boost Level 2 Counter

--

0 Counts

The scan tool displays a numeric value. This is the number of level 2 idle boosts.

Boost Level 3 Counter

--

0 Counts

The scan tool displays a numeric value. This is the number of level 3 idle boosts.

BPPS High During Learn

--

Yes

The scan tool displays Yes or No. Yes is displayed if the BPPS was high during BPP calibration.

--

No

BPPS Learned Home Position

--

219 Counts

The scan tool displays Counts. This numeric value is the BPPS Learned Home Position.

BPPS Move During Learn

--

Yes

The scan tool displays Yes or No. Yes is displayed if the BPPS was moved during BPP calibration.

--

No

BPPS Low During Learn

--

Yes

The scan tool displays Yes or No. Yes is displayed if the BPPS was low during BPP calibration.

--

No

BPPS Reference

--

792 Counts

The scan tool displays Counts. This numeric value is the BPPS Reference.

BPPS Status (Brake Pedal)

--

Invalid

The scan tool displays Invalid, Learned, Undecided and Learning. This is the state of the BPPS calibration in the BCM.

--

Learned

--

Undecided

--

Learning

Brake Fluid Level Switch

Empty

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when a fault occurs.

Full

Off

Brake Lamps

Brake pedal applied

On

The scan tool will display On/Off depending on the position of the Brake Pedal.

Brake pedal not applied

Off

Brake Pedal Position Sensor

--

174 Counts

The scan tool displays counts. The numerical value is the location of the BPP as interpreted by the BCM

Brake Status

Brakes applied

On

The scan tool displays On or Off. This is the state of the brakes.

Brakes not applied

Off

Brake System Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when doing a system check or fault occurs.

--

Off

Central Door Lock Switch

Centre console door lock button pressed

Active

This parameter displays Active if the central locking has been activated.

Centre console door lock button in idle position

Inactive

Central Door Unlock Switch

Centre console door unlock button pressed

Active

This parameter displays Active if the central locking has been deactivated.

Centre console door unlock button in idle position

Inactive

Cruise Control Switch

Cruise control switched Off

Off

The scan tool displays Off, On, Resume, Set, Error or Cancel. This is the current state of the cruise control switch.

Cruise control switched On

On

Resume/Accel cruise button pressed

Resume

Set/Decel cruise button pressed

Set

--

Error

Brake pedal applied

Cancel

Current Anti-Theft Warning

--

None

The scan tool displays None, Driver Door, Passenger Door, Hood, Ignition, Intrusion, Inclination, Remote, Battery Reconnect, Power Mode or Tamper. These parameters are the possible Current Anti-Theft Warnings

--

Driver Door

--

Passenger Door

--

Hood

--

Ignition

--

Intrusion

--

Inclination

--

Remote

--

Battery Reconnect

--

Power Mode

--

Tamper

Current Trip Distance

--

Km

This parameter will display the current distance travelled.

Daytime Running Lamps

Daytime running lamps activated

On

This parameter displays whether the daytime running lamps are On or Off. If Fitted

Daytime running lamps deactivated

Off

Desired Voltage

--

12 Volts

The scan tool displays 0-14 Volts. The scan tool displays approximately 12 Volts when the ignition is on.

Dimming Control Signal

--

Volts

 

Dimming Control Switch

Dimming control increase switch activated

Up

This parameter displays the status of the Dimming Control Switch.

Dimming control Decrease switch activated

Down

Dimming control switch idle position

Inactive

Distance To Arrival

--

Km

Miles

 

Door Key Cylinder Lock Switch

--

Active

The scan tool displays Active or Inactive. This is the state of the door key cylinder lock switch.

--

Inactive

Door Key Cylinder Unlock Switch

--

Active

The scan tool displays Active or Inactive. This is the state of the door key cylinder unlock switch.

--

Inactive

Door Lock Request

Centre console door lock button pressed

Power Lock

The scan tool displays Power Lock, Door Key Cyl. Keyless Entry, or Auto Locks. This is the current state of the door lock request as monitored by the BCM.

Door locked by key in door lock cylinder

Door Key Cyl.

Remote key door lock button pressed

Keyless Entry

Key removed from ignition

Auto Locks

Door Open Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when a door is open or not closed correctly.

--

Off

Driver Door Unlock Command

Driver door unlock switch activated

Active

The scan tool displays Active or Inactive. This is the state of the driver door unlock switch.

Driver door unlock switch deactivated

Inactive

Driver Identification

Driver key 1/2/3 in ignition

Driver 1

This parameter identifies the current key in the ignition.

Driver 2

Driver 3

Drivers Door Ajar Switch

With Door Open

Door Ajar

This parameter displays Opened , which will command the telltail lamp on the Instrument Cluster to illuminate when a door is opened or not closed correctly.

With Door Closed

Door Closed

Drivers Side Seat Belt Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when the seat belt is not buckled.

--

Off

Engine Coolant Temperature

--

12 °C

This parameter displays the current temperature of the coolant in the vehicle.

Engine Hood Open Switch

Engine hood open

Active

This parameter displays the status of the Engine Hood Open Switch.

Engine hood closed

Inactive

Engine Speed

--

RPM

This parameter displays the speed of the crankshaft as calculated by the control module based on inputs from the crankshaft Position (CKP) Sensor. The scan tool will diplay the Engine speed in revolutions per minute (RPM).

Estimated Battery Temperture

--

12 °C

This parameter displays the current temperature of the battery.

Fixed Service Interval

--

Km

Miles

 

Flash to Pass Switch

Flash to pass switch activated

Active

The scan tool displays Active or Inactive. This is the state of the flash to pass switch.

Flash to pass switch in idle position

Inactive

Fog Lamp Front

Front fog lamps activated

On

This parameter displays On, when you activate the front fog lamp switch.

Front fog lamps deactivated

Off

Front Fog Lamp Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when the front fog lamps are turned on.

--

Off

Front Fog Lamp Switch

Front fog lamp switch activated

Active

This parameter displays if the fog lamp switch is Active or Inactive. This Determines weather the switch is receiving voltage.

Front fog lamp switch deactivated

Inactive

Fuel Economy Mode

--

Active

If the battery is over 80% charged the BCM may reduce regulated voltage to as low as 12.8 volts.

--

Inactive

Fuel Used A

--

Litres

This parameter displays the total litres of fuel used since the trip computer was reset.

Fuel Used B

--

Litres

This parameter displays the total litres of fuel used since the trip computer was reset.

Hazard Request

--

Active

This parameter displays if the Hazard switch is Active or Inactive.

--

Inactive

Headlamp Switch

Headlamp switch activated

On

The scan tool displays On or Off. This is the state of the Headlamp Switch.

Headlamp switch deactivated

Off

Headlamp Washer Relay Command

Headlamp washer relay activated

On

This parameter displays On or Off. This is the state of the headlamp washer relay.

Headlamp washer relay deactivated

Off

High Beam

High beam activated

On

This parameter displays if the High Beam lamps are On or Off.

High beam deactivated

Off

High Beam Switch

High beam switch activated

Active

This parameter displays if the High Beam Switch is Active or Inactive.

High beam switch deactivated

Inactive

High Beam Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when the high beam lamps are turned on.

--

Off

Hood Close Switch

Hood closed

Active

This parameter displays the status of the Hood Close Switch.

Hood open

Inactive

HS Communication Command

HS communication activated

Active

The scan tool displays On or Off. This is the state of the high speed communications command of the BCM.

HS communication deactivated

Inactive

Ignition Accessory/Run

--

Active

The scan tool displays Active or Inactive. This is the state of the ignition Accessory/Run.

--

Inactive

Ignition Off/Run/Crank

Ignition is in OFF position

Key In

This parameter displays the current status of the ignition Off/Run/Crank.

Ignition is in ACC position

Key Off

Ignition is in RUN position

Run

Ignition is in

Crank

Ignition Run/Crank

Ignition is in RUN/CRANK position

Active

The scan tool displays Active or Inactive. This is the state of the ignition Run/Crank.

Ignition is in OFF/ACC position

Inactive

Ignition Switch

--

On - 12 volts

This parameter displays the current status of the ignition cycle.

--

Off - 0 volts

Incand Dimming PWM Command

--

0 - 100%

This scan tool displays a percentage. This is the current incandescent dimming percentage.

Interior Lamp Door Switch

Interior lamp door switch activated

Active

This parameter displays the status of the Interior Lamp Door Switch.

Interior lamp door switch deactivated

Inactive

Interior Lamp Activation Reason

--

Off

This parameter displays the interior lamp activation reason.

--

Door Open

--

Manual Defeat

Interior Lamp On/Off Switch

Interior lamp On/Off switch activated

On

This parameter displays if the interior lamp is turned On or Off.

Interior lamp On/Off switch deactivated

Off

Interior Lamp PWM Command

--

0 -100%

This parameter displays the interior lamp dimming percentage.

Key In Status

Key in ignition

Key In

This parameter displays if the ignition key is In or Out of the ignition barrel

Key not in ignition

Key Out

Last Remote Key Used

--

Ignition key dependant

This parameter displays the last programmed remote key in the ignition.

LED Dimming PWM Command

0 - 100

%

The scan tool displays a percentage. This is the current LED dimming percentage.

Left Front Turn Signal

Left front turn signal activated

On

This parameter displays whether the Left Front Turn Signal is active or inactive.

Left front turn signal deactivated

Off

Left Rear Turn Signal

Left rear turn signal activated

On

This parameter displays whether the Left Rear Turn Signal is active or inactive.

Left rear turn signal deactivated

Off

Left Scroll Switch

--

0 Counts

 

Left Turn Signal Switch

Left turn signal switch activated

Active

This parameter displays the status of the Left Turn Signal Switch.

Left turn signal switch in the idle position

Inactive

Load Shed Level 2 Count

--

0 Counts

 

Load Shed Level 3 Count

--

0 Counts

 

Low Beam

Low beams activated

On

This parameter displays the status of the Low Beam Headlamps.

Low beams deactivated

Off

Odometer

--

Km

Miles

This parameter displays the odometer reading which calculates the distance travelled based on information from the ECM.

Off/Run/Crank Reference

--

5.4 Volts

The scan tool displays volts. This is the current Off/Run/Crank reference voltage.

Off/Run/Crank Signal

--

4.4 Volts

The scan tool displays volts. This is the current Off/Run/Crank signal voltage.

Parasitic Current

--

0 Amps

The scan tool displays amperes. This is the state of the parasitic draw on the battery.

Park Brake Switch

With Park Brake

Active

This parameter displays the current position of the Park Brake switch.

With Park Brake

Inactive

Park Lamp Switch

Park lamp switch activated

On

This parameter displays the status of the park lamp switch.

Park lamp switch deactivated

Off

Park Lamps

Park lamps activated

On

This parameter displays On when the park lamps are in the on position.

Park lamps deactivated

Off

Passenger Ajar Switch

With door open

Door Ajar

The scan tool displays the current status of the passenger door ajar switch.

With door closed

Door Closed

Passenger Door Unlock Command

Passenger door unlock switch activated

Active

The scan tool displays Active or Inactive. This is the state of the passenger doors unlock system.

Passenger door unlock switch deactivated

Inactive

Phone

--

On

 

--

Off

Powertrain HS Communication

Powertrain HS communication activated

Active

The scan tool displays Active or Inactive. This is the state of the powertrain high speed communications command.

Powertrain HS communication deactivated

Inactive

Previous State of Charge

--

0 - 100%

The scan tool displays a percentage. This was the previous state of charge of the battery at start up.

Puddle Lamps

Puddle lamps activated

On

This parameter displays On when the Puddle Lamps are active.

Puddle lamps deactivated

Off

Rain Sensor Mode

--

OFF Parked

 

Rain Sensor Signal

--

Volts

 

Rain Sensor Wiper Request

--

Valid

 

--

Invalid

Rear Fog Light Status

Rear fog lights activated

On

The scan tool displays On or Off. This is the state of the rear fog light.

Rear fog lights deactivated

Off

Rear Fog Light Switch

Rear fog light switch activated

Active

This parameter displays the status of the rear fog light switch.

Rear fog light switch deactivated

Inactive

Rear Lamp Flasher Switch

Rear lamp flasher switch activated

Active

This parameter displays the status of the rear lamp flasher switch.

Rear lamp flasher switch deactivated

Inactive

Regulator Setpoint

--

0 - 100%

The scan tool displays a percentage. This is the set point of the voltage regulator.

Remaining Fuel

--

0 - 100%

This parameter displays the percentage of remaining fuel in the tank.

Remaining Fuel

--

Litres

This parameter displays the litres of remaining fuel in the tank.

Remote Key 1 Function

--

None

 

Remote Key 2 Function

--

None

 

Remote Key 3 Function

--

None

 

Remote Key 4 Function

--

None

 

Remote Key No. 1

--

Programmed

Not Programmed

This parameter displays the Remote key has been programmed or not programmed.

--

Remote Key No. 2

--

--

Remote Key No. 3

--

--

Remote Key No. 4

--

--

Reverse Lamps

Reverse gear selected

On

This parameter displays whether the reverse lamps are On or Off.

Reverse gear not selected

Off

Right Front Turn Signal

Right front turn signal activated

On

This parameter displays whether the Right Front Turn Signal is active or inactive.

Right front turn signal deactivated

Off

Right Rear Turn Signal

Right rear turn signal activated

On

This parameter displays whether the Right Rear Turn Signal is active or inactive.

Right rear turn signal deactivated

Off

Right Scroll Switch

--

Counts

 

Right Turn Signal Switch

Right turn signal switch activated

Active

This parameter displays the status of the Right Turn Signal Switch.

Right turn signal switch in idle position

Inactive

Run Relay Command

--

On

 

--

Off

Run/Crank Relay Command

Ignition is in RUN/CRANK position

On

The scan tool displays On or Off. This is the state of the Run/Crank relay.

Ignition is in OFF/ACC position

Off

Shift Light Solenoid Command

--

Unlock

 

Shift Lock Solenoid Command

Shift lock solenoid activated

Lock

The scan tool displays Lock or Unlock. This is the state of the shift lock solenoid.

Shift lock solenoid deactivated

Unlock

Shift Mode Switch

--

Active

This parameter displays the status of the shift mode switch.

--

Inactive

Shift Up Indicator

--

On

 

--

Off

Shifter Unlock Command

Shifter unlock command activated

On

The scan tool displays On or Off. This is the state of the shifter unlock command

Shifter unlock command deactivated

Off

SRS Air Bag Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when doing a systems check or a fault has been logged.

--

Off

Start Up State of Charge

--

0 - 100%

The scan tool displays a percentage. This was the last state of charge of the battery at start up.

State of Charge

--

0 - 100%

The scan tool displays a percentage. This is the current state of charge of the battery.

Steering Wheel Cruise Indicator

0 - 100

%

 

Steering Wheel Switch

--

On

This parameter displays the status of the Steering Wheel Switch.

--

Off

Surveillance Mode Switch

Surveillance mode switch activated

Active

This parameter displays the status of the surveillance mode switch.

Surveillance mode switch deactivated

Inactive

System Power Mode

Ignition is in OFF position

Off

This parameter displays Accessory/Run/Crank. This is the status of the system power mode dependent on the ignition position.

Ignition is in ACC position

Accessory

Ignition is in RUN position

Run

Ignition is in CRANK position

Crank

TC/ESP Switch (Traction Control)

Traction control turned on

Active

This parameter displays the status of the TC/ESP switch (Traction Control).

Traction control turned off

Inactive

Theft Horn Relay Command

Security system activated

On

The scan tool displays On or Off. This is the state of the theft horn relay.

Security system deactivated

Off

Time Till Arrival

--

day(s)

This parameter displays the total days remaining till Arrival.

Time Till Arrival

--

00:00:00 (hh:mm:ss)

The scan tool will display the total time remaining till Arrival.

TPM Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when doing a systems check or a fault is logged.

--

Off

Trip A Distance

--

Km

Miles

This parameter displays the total kilometers travelled since last reset.

Trip A Time

--

day(s)

This parameter will display the total days remaining till Arrival.

Trip A Time

--

00:00:00 (hh:mm:ss)

This parameter will display the engine running time during this ignition cycle.

Trip B Distance

--

Km

Miles

This parameter displays the total kilometres travelled since last reset.

Trip B Time

--

day(s)

This parameter displays the total days remaining till Arrival.

Trip B Time

--

00:00:00 (hh:mm:ss)

This parameter will display the engine running time during this ignition cycle.

Trunk Release Command

Trunk release button is pressed

Active

The scan tool displays Active or Inactive. This is the state of the trunk release relay.

Trunk release button not pressed

Inactive

Trunk Switch

Trunk switch activated

Active

This parameter displays the status of the Trunk Switch.

Trunk switch deactivated

Inactive

Turn Left Signal Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when the turn signal switch is activated.

--

Off

Turn Right Signal Telltail

--

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when the turn signal switch is activated.

--

Off

Up and Down Shift Switch

Active select shift up

Up

This parameter displays the status of the up and down shift switch.

Active select shift up

Down

Active select idle position

Inactive

Vehicle Speed

--

Kph

Mph

This parameter indicates the vehicle speed calculated by the control module based on an input from the vehicle speed sensor (VSS). The scan tool will display a high value at higher vehicle speeds, and a low value at lower vehicle speeds.

Washer Level Switch

--

On

This parameter displays the status of the Washer Level Switch.

--

Off

Washer Relay Command

Washer relay command activated

On

The scan tool displays On or Off. This is the state of the washer relay.

Washer relay command idle position

Off

Windscreen Washer Switch

Windscreen washer switch activated

Active

This parameter displays the status of the windscreen washer switch.

Windscreen washer switch in idle position

Inactive

Windscreen Wiper Switch

User dependent

Off

This parameter displays the status of the windscreen washer switch.

Single wipe

Low

High

Wiper Delay Setting

User Dependent

1-5

The scan tool displays a numeric value. This is the wiper delay setting.

Wiper Depressed Park Switch

--

On

This parameter displays the status of the Wiper Depressed Park Switch.

--

Off

Wiper High Speed Relay

Wiper high speed relay activated

On

The scan tool displays On or Off. This is the state of the wiper high speed relay.

Wiper high speed relay deactivated

Off

Wiper High Speed Switch

Wiper high speed switch activated

Active

This parameter displays the status of the wiper high speed switch.

Wiper high speed switch deactivated

Inactive

Wiper Park Switch

Wiper park switch activated

On

This parameter displays the status of the Wiper Park Switch.

Wiper park switch in idle position

Off

Wiper Relay Command

Wiper relay activated

On

This parameter displays weather the wiper relay is receiving power. The wiper function is controlled via the (BCM).

Wiper relay deactivated

Off

Body Control Module Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

Backup Lamps

Exterior Lighting

The BCM activates the backup lamp relay when you select ON. The backup lamps illuminate for 5 seconds or until commanded OFF.

Fog Lamps

Exterior Lighting

The BCM activates the fog lamps relay when you select ON. The fog lamps illuminate for 5 seconds or until commanded OFF.

High Beams

Exterior Lighting

The BCM activates the high beam relay when you select ON. The high beam headlamps illuminate for 5 seconds or until commanded OFF.

LF Turn Signal

Exterior Lighting

The BCM activates the left front turn signal lamps when you select ON. The turn signal lamps illuminate for 5 seconds or until commanded OFF.

Low Beams

Exterior Lighting

The BCM activates the low beam relay when you select ON. The low beam headlamps illuminate for 5 seconds or until commanded OFF.

LR Turn Signal

Exterior Lighting

The BCM activates the left rear turn signal lamps when you select ON. The lamp illuminates for 5 seconds or until commanded OFF.

Parking Lamps

Exterior Lighting

The BCM activates the park lamp relay when you select ON. The park lamps illuminate for 5 seconds or until commanded OFF.

RF Turn Signal

Exterior Lighting

The BCM activates the right front turn signal lamps when you select ON. The turn signal lamps illuminate for 5 seconds or until commanded OFF.

RR Turn Signal

Exterior Lighting

The BCM activates the right rear turn signal lamps when you select ON. The lamp illuminates for 5 seconds or until commanded OFF.

Courtesy Lamp

Interior Lighting

The BCM activates the interior lamps outputs for 5 seconds when you select ON. The dome, footwell, and courtesy lamps illuminate for 5 seconds or until commanded OFF.

Incandescent Dimming

Interior Lighting

The BCM activates the interior incandescent type component lamps from full dim to full bright for 5 seconds or until commanded OFF.

LED Dimming

Interior Lighting

The BCM activates the interior LED type component lamps from full dim to full bright for 5 seconds or until commanded OFF.

Wiper

Miscellaneous Test

The Wiper/Washer switch has to be in the off position for this output control to function. The BCM actuates the Wiper relay when you select ON. The front wipers should operate in intermittent mode.

Horn

Miscellaneous Test

The BCM Energizes the horn relay for 5 seconds when you select On or until you select Off.

The Transmission Scan Tool Data Definitions contain a brief description of manual transmission related parameters available on the scan tool. The list is in alphabetical order. A given parameter may appear in any one of the data lists. In some cases, the parameter appears more than once or in more than one data list in order to group certain related parameters together.

CPP Switch: This parameter displays the state of the clutch pedal switch circuit input. The scan tool will display APPLIED when the clutch pedal is depressed, and RELEASED when the clutch pedal is released.

Vehicle Speed Sensor: 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.

Wheel Speed Sensor: This parameter displays the speed at which the vehicle is travelling. The scan tool displays vehicle speed as kilometres per hour (km/h), miles per hour (m.p.h.). The vehicle speed is calculated based on the input signal from the wheel speed sensor.

The Transmission Scan Tool Data List contains manual 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.

A complete list of all engine related scan tool parameters can be found in the Scan Tool Data List in Engine Controls - 3.6L.

Use the Transmission Scan Tool Data List only after the following is determined:

    • The Diagnostic System Check - Vehicle in Vehicle DTC Information, is completed.
    • There are no diagnostic trouble codes (DTCs) shown.
    • The on-board diagnostics are functioning properly.

Scan tool values from a properly functioning vehicle may be used for comparison with the vehicle you are diagnosing.

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 - Manual Transmission in Manual Transmission - Aisin AY6.

The column labelled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

Engine Data 1: (1)

Engine Data 2: (2)

EVAP Data: (3)

Fuel Trim Data: (4)

HO2S Data: (5)

Misfire Data: (6)

TAC Data: (7)

CMP Actuator Data: (8)

Cooling/HVAC Data: (9)

Cruise/Traction Data: (10)

Electrical/Theft Data: (11)

IPC Data: (12)

ODM Data: (13)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released

CPP Switch (If Equipped)

1

APPLIED/RELEASED

RELEASED

Wheel Speed Sensor

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12

km/h (mph)

0

Use the scan tool data values under the following conditions:

    • The Diagnostic System Check - Vehicle in Vehicle DTC Information is complete.
    • The on-board diagnostics are functioning properly.
    • No diagnostic trouble codes (DTCs) are present.

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 in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values below were recorded under the following conditions:

    • Engine at idle
    • Upper radiator hose hot
    • Closed throttle
    • Transmission in Neutral
    • Closed Loop operation
    • Accessories OFF
    • Brake pedal not applied

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Clutch Pedal Switch

F0, F3

applied/released

released

Reverse Inhibit Solenoid Command

F0

INHIBIT/OFF

OFF

Wheel Speed Sensor

ALL

km/h (mph)

0

*Data List Legend

    • F0: Engine Data 1
    • F1: Engine Data 2
    • F2: Engine Data 3
    • F3: Cruise Control Data
    • F4: Enhanced EVAP Data
    • F5: Fuel Trim Data
    • F6: Misfire Data
    • F7: TAC Data
    • F8: H02S Data
Clutch Pedal Switch: This parameter displays the state of the clutch pedal switch circuit input. The scan tool will display APPLIED when the clutch pedal is depressed, and RELEASED when the clutch pedal is released.

Reverse Inhibit Solenoid Command: This parameter displays the commanded state of the reverse inhibit solenoid. When the vehicle speed is greater than 5 km/h (3 mph), the solenoid is commanded ON, inhibiting shifts to Reverse. When the vehicle speed is less than 5 km/h (3 mph), the solenoid is commanded OFF, allowing shifts to Reverse. The scan tool will display ON/OFF.

Reverse Inhibit Solenoid Command: This parameter displays the commanded state of the reverse inhibit solenoid. When the vehicle speed is greater than 5 km/h (3 mph), the solenoid is commanded ON, inhibiting shifts to Reverse. When the vehicle speed is less than 5 km/h (3 mph), the solenoid is commanded OFF, allowing shifts to Reverse. The scan tool will display ON/OFF.

Vehicle Speed: 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 Output Control

Additional Menu Selection(s)

Description

Reverse Inhibit

Special Functions - Engine Output Controls

Command grounds the reverse lockout solenoid control circuit. Turns the reverse inhibit solenoid ON and OFF.