Circuit/System Description

The body control module (BCM) provides voltage to each door latch assembly over the door jamb switch signal circuits. The door latch assemblies are permanently grounded at G201. The door ajar switches are normally open when the doors are fully closed. When a door is opened, the door ajar switch contacts close providing a path to ground. The driver information center (DIC) located at the bottom of the instrument panel cluster (IPC), illuminates the DOOR AJAR indicator when the BCM detects that one of the doors is open. The IPC receives a GMLAN serial data message from the BCM indicating the door ajar status. If this message is displayed and the vehicle speed is greater than 4.8 km/h (3 mph), a chime will sound.