The body control module (BCM) receives an input from all four door ajar switches, drivers, passengers, left rear, and right rear. The door ajar switches are normally open when the doors are fully closed. When a door is opened, the door ajar switch contacts close providing a path to ground. The message center on the instrument panel cluster (IPC), illuminates the door ajar message when the one of the doors is open. The IPC receives a serial data message from the BCM, indicating the door ajar status. If this message is displayed and the vehicle speed is greater than 8.1 km/h (5 mph), a chime will sound.

Schematic Reference

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

1. Ignition OFF, disconnect the harness connectors at the two door latch assemblies and the two sliding door jamb switches.
2. Ignition OFF, test for less than 1.0 ohm of resistance between each of the four ground circuits and ground

⇒	If any of the ground circuits are greater than 1.0 ohm, test that ground circuit for an open/high resistance.

3. Verify the scan tool Door Ajar Switch parameters are all closed.

⇒	If not closed, test the appropriate signal circuit for a short to ground. If all circuits test normal, replace the BCM.

4. Install a 3-amp fused jumper one at a time between the four signal circuits and ground. Verify the scan tool Door Ajar Switch parameter is Ajar when each signal circuit is activated.

⇒	If not Ajar, test the appropriate signal circuit for a short to voltage or an open/high resistance. If all circuits test normal, replace the BCM.

5. Ignition OFF, reconnect the harness connectors at the two door latch assemblies, and the two sliding door jamb switches, one at a time. Open and close the door with the reconnected harness. Verify the appropriate scan tool Door Ajar Switches parameter is Ajar when the door is open and closed when the door is closed.

⇒	If not Ajar when open or closed when closed, replace the appropriate door latch assembly or sliding door jamb switch.

6. If all circuits test normal, test or replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.