For 1990-2009 cars

### Door Ajar Indicator System Components

The door ajar indicator system consists of the following components:

• | The driver door module (DDM)

• | The passenger door module (PDM)

• | The body control module (BCM)

• | The instrument panel cluster (IPC)

• | The driver information center (DIC)

• | The driver door ajar switch

• | The passenger door ajar switch

• | The left rear door ajar switch

• | The right rear door ajar switch

• | The liftgate ajar switch Driver Door Ajar And Passenger Door Ajar

### Driver Door Ajar And Passenger Door Ajar

The driver door module (DDM) and passenger door module (PDM) receive a discrete input from the respective door ajar switch to indicate the status of the door. The DDM or PDM then communicates this status to the instrument panel cluster (IPC) via LAN message. The IPC, upon receipt of this LAN message, will illuminate the appropriate door ajar message in the driver information center (DIC) and also send a LAN message to the radio to activate the door ajar audible warning when the following conditions are met:

• | The transmission is removed from PARK

• | The vehicle speed is greater then 8.05 km/h (5 mph)

### Left Rear Door Ajar And Right Rear Door Ajar

The body control module (BCM) receives discrete inputs from both the left and right rear door and liftgate ajar switches to indicate the status of the doors and liftgate. The BCM then communicates this status to the instrument panel cluster (IPC) via LAN message. The IPC, upon receipt of this LAN message, will illuminate the appropriate door ajar message in the driver information center (DIC) and also send a LAN message to the radio to activate the door ajar audible warning when the following conditions are met:

• | The transmission is removed from PARK

• | The vehicle speed is greater then 8.05 km/h (5 mph)