Door Ajar System

DOOR AJAR SYSTEM
The door ajar, tailgate and flip-up glass ajar states are used as inputs for the Body Control Module (BCM). The BCM uses these inputs to determine exactly what position the doors, tailgate and flip-up glass are in.

The DRB III (R) will display the state of the door ajar, tailgate ajar and flip-up glass ajar switches in Input/Outputs. It's important to note, that when any door, the tailgate or flip-up glass is closed the switch state on the DRB III (R) will show OPEN.

When any door, the tailgate or flip-up glass is open the switch state on the DRB III (R) will show CLOSED. During diagnosis, if a door, the tailgate or flip-up glass is closed and the DRB III (R) displays the switch state as CLOSED, it indicates a shorted ajar circuit. If a door, the tailgate or flip-up glass is open and the DRB III (R) displays the switch state as OPEN, it indicates an open ajar circuit.

The door ajar switch is part of the door latch assembly. Each of the door ajar switches are individually connected to the Body Control Module. On right hand drive vehicles there is a separate ground wire connected to the BCM to identify it as a right hand drive. Therefore, when using the DRB III and reading Input/Output on a RHD vehicle, the driver door ajar switch will read the Right Front Door Ajar Switch status.

Refer to Electronic Vehicle Information Center (EVIC).
Electronic Vehicle Information Center (EVIC)