Body Control Module
WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. 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:
- A/C compressor request - Refer to Air Temperature Description and Operation in HVAC Systems-Manual.
- A/C cooling fan - Refer to Air Delivery Description and Operation in HVAC Systems-Manual.
- Battery rundown protection (Inadvertent Power) - Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
- Brake fluid level sensing - Refer to DESCRIPTION & OPERATION in Disc & Drum in Brakes.
- 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
- Door ajar warning
- Headlamps ON
- Key-in-ignition
- Oil reset
- Park brake warning
- Seat belt not fastened
- Turn signal ON
- Door lock interface - Refer to Power Door Locks Description and Operation in Doors.
- Electronic steering control (ESC) - Refer to Power Steering System Description and Operation in Power Steering System.
- Engine coolant level sensing - Refer to Cooling System Description and Operation in Engine Cooling.
- Exterior and interior lighting control - Refer to Exterior Lighting Systems Description and Operation
in Lighting Systems.
- Automatic lighting control
- Daytime running lights (DRL)
- Fog lamps
- Park brake lights
- Turn hazard lamps
- Gage control - Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
- 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 DESCRIPTION & OPERATION in Disc & Drum in 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.
- Seat belt use sensing - Refer to Seat Belt System Description and Operation in Seat Belts.
- Theft deterrent - 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.