Body Control Module (BCM)

The Body Control Module (BCM) is located behind the driver side cowl panel and controls the following:

Interior lighting
Exterior lighting
Dimmable backlighting
Battery saver function
Delayed accessory relay function
Horn
Brake shift interlock
Power door locks (vehicles without Intelligent Access (IA))
Remote Keyless Entry (RKE) system
Perimeter alarm
Passive Anti-Theft System (PATS) (vehicles without IA)
Remote engine start
Tire Pressure Monitoring System (TPMS)

Refer to the appropriate article for system specific information and diagnostics.

Battery Saver

NOTE: Time-out is 1 minute if the vehicle has less than 80 km (50 miles).

To save battery voltage, the BCM provides automatic shut-off of some system controlled components after a time-out period. REFER to Exterior Lighting (Exterior Lighting) or Interior Lighting (Interior Lighting) for system specific information.

Post Crash Alert Feature

The post crash alert is a function controlled by the BCM. If the Restraints Control Module (RCM) determines an impact of enough severity (the air bags may or may not be deployed), the post crash alert function activates. The post crash alert function activates the hazard lamp function and cycles the horn on 3 times, then off for 4 seconds, and repeats this cycle until the battery is discharged or the function is turned off. The post crash alert function can be turned off by:

pressing the hazard flasher lamp switch (which may need to be pressed twice).
pressing the RKE transmitter UNLOCK button.
pressing the RKE transmitter PANIC button.