GM Service Manual Online
For 1990-2009 cars only

Body Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors Closed

Door Lock Requestor

Doors

Auto Locks/Power Lock/Door Key Cyl./Rear Closure/Emergency/Keyless Entry/Passive Keyless/Remote/Delayed Lock/Relocking/Anti-Lockout/Exterior Sw.

Varies

Drvr. Door Unlock Cmd.

Doors

On/Off

OFF

Left Rear Door Ajar Sw.

Doors

Door Ajar/Door Closed

Door Closed

Rear Doors Lock Cmd.

Doors

On/Off

OFF

Rear Doors Unlock Cmd.

Doors

On/Off

OFF

Right Rear Door Ajar Sw.

Doors

Door Ajar/Door Closed

Door Closed

Driver Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors Closed

Door Lock Actuator Cmd.

Outputs

Off/Unlock/Lock

Off

Door Key Cyl. Unlock Switch

Inputs

Idle/Unlock

Idle

Driver Door Ajar Sw.

Inputs

Inactive/Active

Inactive

Driver Door Open Sw.

Inputs

Inactive/Active

Inactive

Passenger Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors Closed

Door Lock Actuator Cmd.

Outputs

Off/Unlock/Lock

Off

Door Key Cyl. Unlock Switch

Inputs

Idle/Unlock

Idle

Passenger Door Ajar Sw.

Inputs

Inactive/Active

Inactive

Passenger Door Open Sw.

Inputs

Inactive/Active

Inactive

Liftgate Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Liftgate Closed

Battery Voltage Signal 2

Data

Voltage

Varies

Hall Sensor Feed Status

Data

No Output/Short to Ground

No Output

Liftgate Handle Switch Status

Data

Active/Inactive

Inactive

Liftgate Ajar Switch

Data

Active/Inactive

Inactive

Object Detection Sensor Status

Data

Voltage

3.33 V

Object Sensor Supply Voltage

Data

Active/Inactive

Active

LGM Clutch Actuator Command

Data

Active/Inactive

Inactive

LGM Latch Motor Cinch Command

Data

Active/Inactive

Inactive

LGM Latch Pawl Switch

Data

Active/Inactive

Inactive

LGM Latch Ratchet Switch

Data

Active/Inactive

Inactive

LGM Latch Motor Release Command

Data

Active/Inactive

Inactive

LGM Latch Sector Switch

Data

Active/Inactive

Inactive

LGM Motor Closed Command

Data

Active/Inactive

Inactive

LGM Motor Open Command

Data

Active/Inactive

Inactive

LGM Open/Close Position Learned

Data

Yes/No

Yes

LGM Full Open Switch

Data

Active/Inactive

Inactive

LGM Open/Close History Data

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Liftgate Closed

Crank Signal Present

Open/Close History Data

Yes/No

No

Door Lock Status

Open/Close History Data

Locked/Unlocked

Unlocked

Hall Sensor Feed Status

Open/Close History Data

No Output/Short to Ground

No Output

LGM Latch Fault

Open/Close History Data

Yes/No

No

LGM Position Out of Range

Open/Close History Data

Yes/No

No

Liftgate Handle Sw. Status

Open/Close History Data

Active/Inactive

Inactive

Module Over Current Detected

Open/Close History Data

Yes/No

No

Object Detection Sensor Status

Open/Close History Data

Yes/No

No

Obstacle Detected in Liftgate

Open/Close History Data

Yes/No

No

System Operation Status

Open/Close History Data

OK/Not OK

OK

System Voltage

Open/Close History Data

OK/Out of Range

OK

Temperature Out of Range

Open/Close History Data

Yes/No

No

Vehicle In Park

Open/Close History Data

Yes/No

Yes