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 four door latch assemblies.
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 Switches parameter is Inactive.

⇒	If not Inactive, test each of the four signal circuits for a short to ground. If the 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 Switches parameter is Active when each signal circuit is jumpered.

⇒	If not Active, 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 four door latch assemblies, one at a time. Open and close the door with the reconnected harness. Verify the scan tool Door Ajar Switches parameter is Active when the door is open and Inactive when the door is closed.

⇒	If not Active when open or Inactive when closed, replace the appropriate door latch assembly.

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.