Body Control Module

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. 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.

Retained Accessory Power, RAP, Audio System only. Refer to RETAINED ACCESSORY POWER
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
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 In Ignition
- Head Lamps On
- Seat Belt Not Fastened
- Turn Signal On
- Park Brake Warning
- Door Ajar Warning
- Check gauges
Gauge 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. Refer to COOLING SYSTEM DESCRIPTION AND OPERATION
Key-in-ignition sensing. Refer to AUDIBLE WARNINGS DESCRIPTION AND OPERATION
Brake fluid level sensing. Refer to BRAKE WARNING SYSTEM DESCRIPTION AND OPERATION
Parking brake state sensing. Refer to BRAKE WARNING SYSTEM DESCRIPTION AND OPERATION
Rear compartment interface. Refer to POWER DOOR LOCKS DESCRIPTION AND OPERATION
Horn interface. Refer to HORNS SYSTEM DESCRIPTION AND OPERATION
Door lock interface. Refer to POWER DOOR LOCKS DESCRIPTION AND OPERATION
Bulb Check. Refer to INSTRUMENT PANEL CLUSTER (IPC) DESCRIPTION AND OPERATION
ETS -Pontiac Only. Refer to ABS DESCRIPTION AND OPERATION
A/T Shift lock control. Refer to AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL DESCRIPTION AND OPERATION