The body control system consists of a body control module (BCM) and its associated controls. Battery positive voltage is provided to the BCM from BFC/BATT fuse in the left hand instrument panel fuse block. The module ground is wired to ground G202. The BCM is wired to the class 2 serial data communication bus as well as discrete input and output terminals to control the functions of the vehicle body .
Power Mode Master
This vehicles BCM functions as the Power Mode Master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.
Data Line Communications
The body control module (BCM) communicates on the following 2 separate data lines:
| • | Class 2 serial data comminutions--Refer to Data Link Communications Description and Operation . |
| • | Serial peripheral interface (SPI)--The BCM acts as the master between itself and the instrument panel cluster (IPC). |
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. |
| • | Remote function control--Refer to Keyless Entry System Description and Operation in Keyless Entry. |
| • | A/C cooling fan |
| • | Audio delay power--Refer to Radio/Audio System Description and Operation in Entertainment. |
| • | Exterior and interior lighting control--Refer to Exterior Lighting Systems Description and Operation in Lighting Systems. |
| - | Daytime running lamps (DRL) |
| - | Automatic lighting control |
| - | Fog lamps |
| • | Interior lighting--Refer to Interior Lighting Systems Description and Operation in Lighting Systems. |
| • | Battery rundown protection from inadvertent power--Refer to Interior Lighting Systems Description and Operation in Lighting Systems. |
| • | Chimes--Refer to Audible Warnings Description and Operation in Instrument Panel, Gages, and Console. |
| - | Key-in-Ignition |
| - | Head Lamps On |
| - | Seat Belt Not Fastened |
| - | Turn Signal On |
| - | Park Brake Warning |
| - | Door Ajar Warning |
| - | Check Gages |
| • | Gage control--Refer to Instrument Cluster Description and Operation in Instrument Panel, Gages, and Console. |
| • | Instrument cluster indicator control--Refer to Instrument Cluster Description and Operation In Instrument Panel, Gages, and Console. |
| • | Theft deterrent--Refer to Theft Systems Description and Operation in Theft Deterrent. |
| • | Engine coolant level sensing--Refer to Cooling System Description and Operation in Engine Cooling. |
| • | Washer solvent level sensing--Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems. |
| • | Key-in-ignition sensing--Refer to Audible Warnings Description and Operation in Instrument Panel, Gages, and Console. |
| • | Seat belt use sensing--Refer to Seat Belt System Description and Operation in Seat Belts. |
| • | Brake fluid level sensing--Refer to Brake Warning System Description and Operation in Hydraulic Brakes. |
| • | Parking brake state sensing--Refer to Brake Warning System Description and Operation in Hydraulic Brakes. |
| • | Rear compartment interface--Refer to Power Door Locks Description and Operation in Doors. |
| • | Horn interface--Refer to Horns System Description and Operation in Horns. |
| • | Door lock interface--Refer to Power Door Locks Description and Operation in Doors. |
| • | Bulb check--Refer to Instrument Cluster Description and Operation in Instrument Panel, Gages, and Console. |
