Door Ajar Indicator Malfunction

Door Ajar Indicator Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provide an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

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 driver information center (DIC) 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 5 km/h (3 mph), a chime will sound.

Circuit/System Verification

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

^ If the reading does not change, refer to Driver Door Ajar Malfunction

2. With the passenger doors closed, observe the scan tool Door Ajar Switch parameter while opening and closing each door. The reading should change between Door Closed and Door Ajar.

^ If the reading does not change, refer to Passenger Door Ajar Malfunction.

Circuit/System Testing

Driver Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the driver door latch assembly.
2. Test for less than 1 ohm between the ground circuit terminal B and ground.

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

3. Ignition ON, verify the scan tool Driver Door Ajar Sw parameter and is Door Closed.

^ If not the specified value, test the signal circuit terminal A 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 A and the ground circuit terminal B. Verify the scan tool Driver Door Ajar Sw parameter is Door 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 ajar switch.

Passenger Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate door ajar switch.
2. Test for less than 1.0 ohm between the ground circuit terminal B and ground.

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

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

^ If not the specified value, test the signal circuit terminal A 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 A and the ground circuit terminal B. Verify the scan tool Door Ajar Switch parameter is Door Ajar.

^ If not the specified value, test the appropriate 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 appropriate door ajar switch.

Component Testing

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

^ If not the specified value, replace the appropriate door ajar switch.

3. Test for less than 2.0 ohms between the signal terminal A and the ground terminal B with the appropriate door ajar switch in the closed position.

^ If greater than the specified range, replace the appropriate door ajar switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Front Side Door Jamb Switch Replacement
* Rear Door Jamb Switch Replacement