Body Control Module
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. 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 BCM functions include the following:
- Battery rundown protection - inadvertent power - Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
- BTSI/Automatic transmission shift lock control - Refer to Automatic Transmission Shift Lock Control Description and Operation in Automatic Transaxle - 4T65-E
- Bulb check - Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
- Chimes - Refer to Audible Warnings Description and Operation
in Instrument Panel, Gages, and Console.
- Check gages
- Content theft deterrent
- Door ajar warning
- Headlamps ON
- Key-in-ignition
- Oil reset
- Park brake warning
- Seat belt not fastened
- Turn signal ON
- Vehicle theft deterrent
- Door lock interface - Refer to Power Door Locks Description and Operation in Doors.
- Exterior and interior lighting control - Refer to Exterior Lighting Systems Description and Operation
in Lighting Systems.
- Automatic lighting control
- Backup lamps
- Daytime running lights (DRL)
- Fog lamps
- High/Low beam head lamps
- Park brake lights
- Turn hazard lamps
- Gage control - Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
- Heated seats - Refer to Heated Seats Description and Operation in Seats.
- Horn interface - Refer to Horns System Description and Operation in Horns.
- Instrument cluster indicator control - Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
- Interior lighting - Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
- Key-in-ignition sensing - Refer to Audible Warnings Description and Operation in Instrument Panel, Gages, and Console.
- Parking brake state sensing - Refer to Brake Warning System Description and Operation in Hydraulic Brakes.
- Retained accessory power (RAP) - Refer to Retained Accessory Power (RAP) Description and Operation in Retained Accessory Power.
- Rear compartment interface - Refer to Power Door Locks Description and Operation in Doors.
- Rear defogger - Refer to Rear Window Defogger Description and Operation in Stationary Windows.
- Remote function control - Refer to Keyless Entry System Description and Operation in Keyless Entry.
- RFA communication link - Refer to Keyless Entry System Description and Operation in Keyless Entry.
- Seat belt use sensing - Refer to Seat Belt System Description and Operation in Seat Belts.
- Theft deterrent vehicle/content- Refer to Theft Systems Description and Operation in Theft Deterrent.
- Washer solvent level sensing - Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.
- Wiper/washer - Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.