For 1990-2009 cars only
Door Ajar Warning
The audio amplifier activates the door ajar audible warning as requested by the body control module (BCM). The BCM sends a serial data message to the radio indicating the chime frequency of a medium rate and continuous duration. The door ajar warning sounds and the door ajar indicator illuminates when the following occurs:
| • | The BCM determines that the driver door is open and the signal circuit is low. The instrument panel cluster (IPC) also receives a serial data message from the BCM requesting illumination of the door ajar indicator. |
| • | The vehicle is not in PARK. The BCM receives a serial data message from the ECM or BCM indicating the gear position. |
