Door Ajar Warning

WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Radio activates door ajar audible warning as requested by Body Control Module (BCM). BCM sends a class 2 message to radio, indicating chime frequency of a medium rate and at a continuous duration. Door ajar warning sounds and DOOR AJAR indicator illuminates when following occurs:

BCM determines that driver's door is open and signal circuit is low. Instrument Panel Cluster (IPC) receives a message via class 2 from BCM requesting illumination of DOOR AJAR indicator.
The vehicle is not in Park. BCM receives a class 2 message from PCM indicating gear position.