Door Ajar Indicator Malfunction (Except RPO AXC/AXE)
Door Ajar Indicator Malfunction (Except RPO AXC/AXE)
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 provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) receives a discrete input from the respective jamb switch to indicate the status of the door. The BCM then communicates this status to the instrument panel cluster (IPC) via a serial data message. The IPC, upon receipt of this serial data message, will illuminate the appropriate ajar message in the driver information center (DIC) and also send a serial data massage to the radio to activate the door ajar audible warning when the transmission is removed from PARK and the vehicle speed is greater then 8 km/h (5 mph).
The door ajar switches supply a ground to the BCM when the door is open. Once the door is closed the door ajar switch opens removing the ground to the BCM. The BCM sends a signal to the IPC to turn on the door ajar light when a door is open.
Circuit/System Verification
Ignition ON, with all doors closed, observe the scan tool Door Ajar Switch parameter while opening and closing all doors. The reading should change between Closed and Ajar.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
2. Test for less than 1.0 ohm between ground circuit terminal listed below and ground:
* Driver door latch assembly ground circuit terminal 8
* LR door latch assembly ground circuit terminal 6
* Passenger and RR door latch assembly ground circuit terminal 3
^ If not the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Door Ajar Switch is Door Closed.
^ If not the specified value, test the signal circuit terminal listed below 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 and the ground circuit terminal listed below. Verify the scan tool Door Ajar Switch is Ajar.
* Driver door latch assembly signal circuit terminal 6 and ground circuit terminal 8
* LR door latch assembly signal circuit terminal 4 and ground circuit terminal 6
* Passenger and RR door latch assembly signal circuit terminal 1 and ground circuit terminal 3
^ 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 door latch assembly.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
2. With the switch in the open position, test for infinite resistance between the signal and the ground terminals listed below:
* Driver door latch assembly signal terminal 6 and ground terminal 8
* LR door latch assembly signal terminal 4 and ground terminal 6
* Passenger and RR door latch assembly signal terminal 1 and ground terminal 3
^ If not the specified value, replace the appropriate door latch assembly.
3. With the switch in the closed position, test for less than 1.0 ohm between the signal and the ground terminals listed below.
* Driver door latch assembly signal terminal 6 and ground terminal 8
* LR door latch assembly signal terminal 4 and ground terminal 6
* Passenger and RR door latch assembly signal terminal 1 and ground terminal 3
^ If not the specified value, replace the appropriate door latch assembly.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Front Side Door Latch Replacement
* Rear Side Door Latch Replacement