The body control module (BCM) receives a discrete input from the driver and passenger door ajar switch signal circuits. The door ajar switches are integral to each door latch assembly. When a door is opened, the normally open door ajar switch closes. With the door ajar switch closed, ground is provided to the door ajar switch signal circuit. The BCM interprets this and sends a serial data message to the instrument panel cluster (IPC). When a door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display DOOR AJAR for the appropriate door that is opened. If the door is still ajar and the vehicles speed is greater than 5 km/h (3 mph) a chime will sound.

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool LF Door Ajar Switch parameter while opening and closing the driver door. The parameter should change between Door Closed and Ajar.

⇒	If the parameter does not change, refer to Driver Door Ajar Malfunction.

⇒	If the parameter changes but the DRIVER DOOR AJAR indicator is always ON or always OFF, replace the IPC.

2. Observe the scan tool RF Door Ajar Switch parameter while opening and closing the passenger door. The parameter should should change between Door Closed and Ajar.

⇒	If the parameter does not change, refer to Passenger Door Ajar Malfunction.

⇒	If the parameter changes but the PASSENGER DOOR AJAR indicator is always ON or always OFF, replace the IPC.

Driver Door Ajar Malfunction

1. Ignition OFF, disconnect the harness connector at the driver door latch.
2. Test for less than 1 ohm between the ground circuit terminal 8 and ground.

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

3. Ignition ON, verify the scan tool LF Door Ajar Switch parameter is Door Closed.

⇒	If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the BCM.

4. Install a 3A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 8. Verify the scan tool LF Door Ajar Switch parameter is Ajar.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

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

Passenger Door Ajar Malfunction

1. Ignition OFF, disconnect the harness connector at the passenger door latch.
2. Test for less than 1 ohm between the ground circuit terminal 3 and ground.

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

3. Ignition ON, verify the scan tool RF Door Ajar Switch parameter is Door Closed.

⇒	If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM.

4. Install a 3A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 3. Verify the scan tool RF Door Ajar Switch parameter is Ajar.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

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

1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
2. Test for infinite resistance between the signal terminal and the ground terminal listed below with the switch in the open position.

•	Driver door latch signal terminal 6 and ground terminal 8

•	Passenger door latch signal terminal 1 and ground terminal 3

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

3. Test for less than 2 ohms between the signal terminal and the ground terminal listed below with the switch in the closed position.

•	Driver door latch signal terminal 6 and ground terminal 8

•	Passenger door latch signal terminal 1 and ground terminal 3

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.