Doors, Hood and Trunk: Description and Operation

DOOR AJAR SYSTEM
The door ajar and liftgate ajar states are used as inputs for the Body Control Module (BCM). The BCM uses these inputs to determine exactly what position the doors and liftgate are in. The DRB III will display the state of the door ajar and the liftgate ajar switches in Inputs/Outputs. It's important to note, that when any door, or the liftgate is closed, the switch state on the DRB III will show OPEN. When any door, or the liftgate is open the switch state on the DRB III will show CLOSED. During diagnosis, if a door or the liftgate is closed and the DRB III displays the switch state as CLOSED, it indicates a shorted ajar circuit. If the door or the liftgate is open and the DRB III displays the switch state as OPEN, it indicates an open ajar circuit.