The driver door module (DDM) and the passenger door module (PDM) receive a discreet input from the driver door ajar switch and the passenger door ajar switch respectively. Likewise, the body control module (BCM) receives a discreet input from both the left and right rear door ajar switches. The door ajar switches are normally open when the doors are fully closed. When a door is open, the door ajar switch contacts close providing a path to ground. The driver information center (DIC) displays the appropriate door ajar message when one of the doors is open. The instrument panel cluster (IPC) receives a serial data message from either the BCM, DDM or PDM indicating the door ajar status. If the message is displayed and the vehicle speed is greater than 8.1 km/h (5 mph), a chime will sound as a reminder of the door ajar status.

Schematic Reference

Connector End View Reference

Electrical Information Release

Scan Tool Reference

Ignition ON, observe the scan tool Door Ajar Switch parameter in the Driver Door Switch data list, Passenger Door Switch data list or the BCM Doors data list (rear doors only) while opening and closing the suspect door. The door ajar switch parameter should change between Active/Inactive or Door Ajar/Door Closed.

1. Ignition OFF, disconnect the harness connector at the suspect door latch assembly.
2. Test for less than 1.0 ohm of resistance between the low reference/ground circuit and ground.

⇒	If greater than the specified value, test the low reference/ground circuit for an open/high resistance.

3. Ignition ON, close all doors and verify the scan tool Door Ajar Switch parameter for the suspect door is Door Closed or Inactive.

⇒	If not the specified value, test the suspect door ajar switch signal circuit for a short to ground. If the circuit tests normal, replace either the driver door module (DDM), the passenger door module (PDM) or the body control module (BCM) for the rear doors only.

4. Install a 3A fused jumper between the suspect door ajar switch signal circuit and the low reference/ground circuit. Verify the scan tool door ajar switch parameter is Door Ajar or Active.

⇒	If not the specified value, test the suspect door ajar switch signal circuit for a short to voltage or an open/high resistance.

5. If all circuits test normal, test or replace the suspect door latch assembly.

Rear Compartment Lid Latch

1. Ignition OFF, disconnect the harness connector at the suspect door latch assembly.
2. Test for infinite resistance between the door ajar switch signal circuit and the low reference/ground circuit in the open position.

⇒	If not the specified value, replace the suspect door latch assembly.

3. Test for less than 2.0 ohms of resistance between the door ajar switch signal circuit and the low reference/ground circuit in the closed position.

⇒	If greater than the specified range, replace the suspect door latch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.