For 1990-2009 cars

### Door Ajar Indicator System Components

The door ajar indicator system consists of the following components:

• | The body control module (BCM)

• | The instrument panel cluster (IPC)

• | The driver information center (DIC)

• | The driver door latch

• | The passenger door latch

• | The left rear door latch

• | The right rear door latch

### Driver and Passenger Door Ajar Operation

The BCM monitors the voltage on the door ajar signal circuits, the door ajar switch is open when the door is closed and the voltage level in the signal circuit will equal the B+ voltage. When the door is open, the door ajar switch closes causing a voltage drop in the ajar signal circuit. The BCM will detect the the voltage drop and send a serial data message to the IPC. The IPC, upon receipt of this serial data message, will illuminate the ajar icon in the DIC and also sends a serial data 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 km/h (5 mph).