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
If the vehicle is equipped with power windows, the window motors or the window switches each provide a 12 V signal to their 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 and the voltage within the signal circuit drops. The window motor or the window switches will detect the voltage drop and will send a serial data message to the body control module which will then send a message to the instrument panel cluster to command the door ajar message.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left (D61)
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the appropriate scan tool Door Ajar Switch parameter changes between Inactive and Active when opening and closing the driver door, the passenger door, the left rear door and right rear door.
• If any parameter does not change
Refer to Circuit/System Testing
• If all the parameters change
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate A23 door latch assembly. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal listed below and ground.
* A23D door latch assembly-driver - ground circuit terminal 8
* A23P door latch assembly-passenger - ground circuit terminal 3
* A23LR door latch assembly-left rear - ground circuit terminal 8
* A23RR door latch assembly-right rear - ground circuit terminal 3
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Ignition ON.
4. Verify the appropriate scan tool Door Ajar Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the appropriate component listed below:
* M74D window motor - driver (AXG)
* S79D window switch - driver (AEC)
* S79P window switch - passenger
* S79LR window switch - left rear
* S79RR window switch - right rear
2. Test for infinite resistance between the signal circuit terminal listed below and ground.
* A23D door latch assembly-driver - signal circuit terminal 6
* A23P door latch assembly-passenger - signal circuit terminal 1
* A23LR door latch assembly-left rear - signal circuit terminal 6
* A23RR door latch assembly-right rear - signal circuit terminal 1
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the appropriate component.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground.
* A23D door latch assembly-driver - signal circuit terminal 6
* A23P door latch assembly-passenger - signal circuit terminal 1
* A23LR door latch assembly-left rear - signal circuit terminal 6
* A23RR door latch assembly-right rear - signal circuit terminal 1
6. Verify the scan tool Door Ajar Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the appropriate component listed below, ignition ON.
* M74D window motor - driver (AXG)
* S79D window switch - driver (AEC)
* S79P window switch - passenger
* S79LR window switch - left rear
* S79RR window switch - right rear
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the appropriate component.
• If Active
7. Test or replace the A23 door latch assembly.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate A23 door latch assembly.
2. Test for infinite resistance between the terminals listed below with the switch in the open position.
* 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 less than infinite resistance
Replace the A23 door latch assembly.
• If infinite resistance
3. Test for less than 5 ohms between the terminals listed below with the switch in the closed position.
* 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 5 ohms or greater
Replace the A23 door latch assembly.
• If less than 5 ohms
4. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Front Side Door Latch Replacement Service and Repair
* Rear Side Door Latch Replacement Service and Repair
* Front Side Door Window Regulator Motor Replacement Service and Repair
* Control Module References Control Module References for BCM replacement, programming and setup