Door Ajar Indicator Malfunction

Door Ajar Indicator Malfunction

Diagnostic Instructions

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



Diagnostic Fault Information






Circuit/System Description

The individual door control modules each receive a discrete input from there respective 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 door control module interprets this and communicates via GMLAN serial data with 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 4.8 km/h (3 mph) the door control module will send a GMLAN serial data message to the IRC requesting 5 chimes to sound.


Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

* Power Door Latch Description and Operation (Description and Operation)
* Power Door Locks Description and Operation (Description and Operation)

Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)


Circuit/System Verification

1. Ignition ON, observe the scan tool door ajar switch parameter located in the driver door module data display menu while opening and closing the driver door. The reading should toggle between DOOR CLOSED and DOOR AJAR.
2. Ignition ON, observe the scan tool door ajar switch parameter located in the passenger door module data display menu while opening and closing the front passenger door. The reading should toggle between DOOR CLOSED and DOOR AJAR.
3. Ignition ON, observe the scan tool door ajar switch parameter located in the left rear door module data display menu while opening and closing the left rear passenger door. The reading should toggle between DOOR CLOSED and DOOR AJAR.
4. Ignition ON, observe the scan tool door ajar switch parameter located in the right rear door module data display menu while opening and closing the right rear passenger door. The reading should toggle between DOOR CLOSED and DOOR AJAR.



Circuit/System Testing

1. Ignition ON, all doors OPEN, observe the scan tool door ajar switch parameter for each of the doors. The scan tool should display DOOR AJAR for each of the doors and the DOOR AJAR indicator should be ON.

• If the scan tool displays DOOR AJAR for all doors and the DOOR AJAR indicator is not ON, replace the IPC.

2. Ignition ON, all doors CLOSED, observe the scan tool door ajar switch parameter for each of the doors. The scan tool should display DOOR CLOSED for each of the doors and the DOOR AJAR indicator should be OFF.

• If the scan tool displays DOOR CLOSED for all doors and the DOOR AJAR indicator is ON, replace the IPC.

3. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
4. Ignition OFF, scan tool OFF, test for less than 10.0 ohms between the ground circuit and ground.

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

5. Ignition ON, verify the scan tool door ajar switch parameter displays DOOR CLOSED.

• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the appropriate door control module.

6. Install a 3A fused jumper wire between the door ajar switch signal circuit and ground. Verify the scan tool door ajar switch parameter displays 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 appropriate door control module.

7. If all circuits tests normal, test or replace the appropriate door latch assembly.



Repair Instructions

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

* Rear Door Lock Replacement (Rear Door Lock Replacement)
* Front Side Door Lock Replacement (Front Side Door Lock Replacement)
* Control Module References (Programming and Relearning) for DDM, IPC, PDM, LRDM, or RRDM replacement, setup and programming