For 1990-2009 cars

### Door Ajar Indicator System Components

The door ajar indicator system consist of the following components:

• | Body control module (BCM)

• | Driver door ajar switch

• | Passenger door ajar switch

• | Door Lock Actuator - Driver

• | Door Lock Actuator - Passenger

### Door Ajar Indicator

The body control module (BCM) receives a discrete input from the driver and passenger door ajar switch signal circuits. The door ajar switches are integral to each door lock actuator assembly. When a door is opened, the normally open door ajar switch closes. With the door ajar switch closed, ground is provided to the door ajar switch signal circuit. The BCM interprets this and communicates via GMLAN serial data with the instrument panel cluster (IPC). When a door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display DOOR AJAR for the appropriate door that is opened. If the door is still ajar and the vehicles speed is greater than 4.8 km/h (3 mph) a chime will sound. The driver and passenger door lock actuator assemblies are grounded at G300.