Body Control Module

WARNING: This page is about a different car, the 2003 Pontiac Grand Am and 2003 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

The various BCM input and output circuits are described in the corresponding functional areas indicated on the BCM electrical schematics. The Body Control Module functions include the following:

A/C compressor request. Refer to AIR TEMPERATURE DESCRIPTION AND OPERATION
Remote Function Control. Refer to KEYLESS ENTRY SYSTEM DESCRIPTION AND OPERATION
A/C cooling Fan. Refer to AIR DELIVERY DESCRIPTION AND OPERATION
Audio Delay Power. Refer to RADIO/AUDIO SYSTEM DESCRIPTION AND OPERATION
Exterior and interior lighting control. Refer to EXTERIOR LIGHTING SYSTEMS DESCRIPTION AND OPERATION
- Daytime running lights (DRL)
- Automatic lighting control
- Fog lamps
Interior lighting. Refer to INTERIOR LIGHTING SYSTEMS DESCRIPTION AND OPERATION
Battery rundown protection (Inadvertent Power). Refer to INTERIOR LIGHTING SYSTEMS DESCRIPTION AND OPERATION
Chimes. Refer to AUDIBLE WARNINGS DESCRIPTION AND OPERATION
- Key-ln-lgnition
- Head Lamps On
- Seat Belt Not Fastened
- Turn Signal On
- Park Brake Warning
- Door Ajar Warning
- Check gages
Gage control. Refer to INSTRUMENT PANEL CLUSTER (IPC) DESCRIPTION AND OPERATION
Instrument cluster indicator control. Refer to INSTRUMENT PANEL CLUSTER (IPC) DESCRIPTION AND OPERATION
Theft deterrent. Refer to THEFT SYSTEMS DESCRIPTION AND OPERATION
Engine coolant level sensing. COOLING SYSTEM DESCRIPTION AND OPERATION
Washer solvent level sensing. Refer to WIPER/WASHER SYSTEM DESCRIPTION AND OPERATION
Key-in-ignition sensing. Refer to AUDIBLE WARNINGS DESCRIPTION AND OPERATION
Seat belt use sensing. Refer to SEAT BELT SYSTEM DESCRIPTION AND OPERATION
Brake fluid level sensing. Refer to BRAKE WARNING SYSTEM DESCRIPTION & OPERATION
Parking brake state sensing. Refer to BRAKE WARNING SYSTEM DESCRIPTION & OPERATION
Rear compartment interface. Refer to POWER DOOR LOCKS DESCRIPTION AND OPERATION
Horn interface. Refer to HORNS SYSTEM DESCRIPTION AND OPERATION
Door lock interlace. Refer to POWER DOOR LOCKS DESCRIPTION AND OPERATION
Bulb Check. Refer to INSTRUMENT PANEL CLUSTER (IPC) DESCRIPTION AND OPERATION