Door Ajar Indicator Malfunction
Door Ajar Indicator Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category
Diagnostic Fault Information
Circuit/System Description
Depending upon the vehicle power window options, the window motors or the window switches will provide the ajar switches with a 12V signal. With the door ajar switch closed, ground is provided to the door ajar switch signal circuit, the window motor and/or window switch will detect the voltage drop and will send a serial data message to the BCM and the BCM will send serial data message to the instrument panel cluster to display the door ajar icon.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Door Ajar Indicator Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
1. Observe the scan tool Driver Door Ajar Switch parameter while opening and closing the driver door. The parameter should change between Active and Inactive.
• If the value does not change, refer to Driver Door Ajar Switch Malfunction.
2. Observe the scan tool Passenger Door Ajar Switch parameter while opening and closing the front passenger door. The parameter should change between Active and Inactive.
• If the value does not change, refer to Passenger Door Ajar Switch Malfunction.
3. Observe the scan tool Left Rear Door Ajar Switch and Right Rear Door Ajar Switch parameters while opening and closing the left and right rear doors. The value should change between Inactive and Active.
• If a value does not change, refer to Rear Door Ajar Switch Malfunction.
Circuit/System Testing
Driver Door Ajar Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the A23D door latch assembly - driver.
2. Test for less than 10 ohms 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 Driver Door Ajar Switch parameter is Inactive.
• If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the M74D window motor - driver.
4. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground. Verify the scan tool Driver Door Ajar Switch parameter is Active.
• 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 M74D window motor - driver.
5. If all circuits test normal, test or replace the A23D door latch assembly - driver.
Passenger Door Ajar Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the A23P door latch assembly - passenger.
2. Test for less than 10 ohms 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 Passenger Door Ajar Switch parameter is Inactive.
• If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the M74P window motor- passenger.
4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Passenger Door Ajar Switch parameter is Active.
• 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 M74P window motor- passenger.
5. If all circuits test normal, test or replace the A23P door latch assembly - passenger.
Rear Door Ajar Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate rear A23 door latch.
2. Test for less than 10 ohms between the ground circuit terminal listed below and ground:
* Left rear door latch ground circuit terminal 8
* Right rear door latch ground circuit terminal 3
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the appropriate scan tool Rear Door Ajar Switch parameter is Inactive.
• If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the rear S79 window switch (AEQ) or the rear M74 window motor (AER).
* Left rear door ajar switch signal circuit terminal 6
* Right rear door ajar switch signal circuit terminal 1
4. Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground. Verify the scan tool Rear Door Ajar Switch parameter is Active.
* Left rear door ajar switch signal circuit terminal 6
* Right rear door ajar switch signal circuit terminal 1
• If not the specified value, test the signal circuit terminal listed below for an open/high resistance. If the circuit tests normal, replace the rear S79 window switch (AEQ) or the rear M74 window motor (AER).
5. If all circuits tests normal, test or replace the rear A23 door latch.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the appropriate A23 door latch.
2. With the switch in the open position, test for infinite resistance between the signal and the ground terminals listed below:
* Driver door latch signal terminal 6 and ground terminal 8
* Left rear door latch signal terminal 6 and ground terminal 8
* Right rear door latch signal terminal 1 and ground terminal 3
* Passenger door latch signal terminal 1 and ground terminal 3
• If not the specified value, replace the A23 door latch.
3. With the switch in the closed position, test for less than 5 ohms between the signal and the ground terminals listed below:
* Driver door latch signal terminal 6 and ground terminal 8
* Left rear door latch signal terminal 6 and ground terminal 8
* Right rear door latch signal terminal 1 and ground terminal 3
* Passenger door latch signal terminal 1 and ground terminal 3
• If greater than the specified range, replace the A23 door latch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Side Door Lock Replacement Front Side Door Lock Replacement
* Rear Side Door Lock Replacement Rear Side Door Lock Replacement
* Front Side Door Window Regulator Motor Replacement Service and Repair