Body Control Module (BCM)

The Body Control Module (BCM) controls the door locking and interior lighting portions of the keyless entry system. On vehicles equipped with the content theft deterrent system (RPO UA6). the BCM also controls the remote alarm. One of three BCM types is installed on this vehicle based on vehicle equipment:
- BCM type 2 provides interior illumination control, inadvertent load (battery rundown) protection, chime functions, and automatic power door locks.
- BCM type 3 provides BCM type 2 features plus keyless entry system (RPO AUO).
- BCM type 4 provides BCM type 2 and 3 features plus content theft deterrent system (RPO UA6) with remote activation verification and remote alarm.

For more information regarding the BCM, refer to Body Control Module.

Diagnostic Trouble Codes (DTCs)
The Remote Control Door Lock Receiver (RCDLR) sends door locking command (and remote alarm command, if equipped) messages to the BCM through the RFA link. The BCM sets DTC 8 if the RFA link circuit 377 is open, or shorted to B+ or ground. Refer to Body Control Module (BCM) for more information. Body Control Module