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 if the vehicle is equipped with driver express up/down power windows or standard power windows, affects how the driver door ajar signal circuits are configured and monitored.
If the vehicle is equipped with driver express up/down power windows, the driver window motor provides a 12♦V signal to the driver door ajar switch signal circuit. The body control module (BCM) provides a 12♦V signal to each of the driver, passenger, rear door ajar switch signal circuits and the trunk/liftgate ajar signal circuit. The door ajar switches are integral to each door latch assembly and the trunk/liftgate ajar switch is integral to the liftgate latch and the rear compartment lid latch. When a door, trunk or liftgate is opened, the normally open ajar switch closes. With the ajar switch closed, ground is provided to the ajar switch signal circuit. The driver window motor and/or BCM the voltage drop and sends a serial data message to the instrument panel to display the door ajar indicator.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
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 scan tool Driver Door Ajar Switch parameter changes between Inactive and Active when opening and closing the driver door.
• If the parameter does not change
Refer to Circuit/System Testing - Door Ajar Switch
• If the parameter changes
3. Verify the scan tool Passenger Door Ajar Switch parameter changes between Inactive and Active when opening and closing the passenger door.
• If the parameter does not change
Refer to Circuit/System Testing - Door Ajar Switch
• If the parameter changes
4. Verify the scan tool Left Rear Door Ajar Switch parameter changes between Inactive and Active when opening and closing the left rear door.
• If the parameter does not change
Refer to Circuit/System Testing - Door Ajar Switch
• If the parameter changes
5. Verify the scan tool Right Rear Door Ajar Switch parameter changes between Inactive and Active when opening and closing the right rear door.
• If the parameter does not change
Refer to Circuit/System Testing - Door Ajar Switch
• If the parameter changes
6. Verify the scan tool Rear Closure Ajar Switch parameter changes between Inactive and Active when opening and closing the trunk or the rear hatch.
• If the parameter does not change
Refer to Circuit/System Testing - Trunk/Hatch Ajar Switch
• If the parameter changes
7. All OK.
Circuit/System Testing
Door Ajar Switch
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)
* K9 body control module (without AXG)
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)
* K9 body control module (without AXG)
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.
Trunk/Hatch Ajar Switch
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M40 rear compartment lid latch or the M30 liftgate latch. 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.
* M30 liftgate latch - ground circuit terminal 1
* M40 rear compartment lid latch - ground circuit terminal 2
• 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 scan tool Rear Closure Ajar Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the K9 body control module.
2. Test for infinite resistance between the signal circuit terminal 5 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 body control module.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal and the ground circuit terminal listed below:
* M30 liftgate latch - signal circuit terminal 2 and ground circuit terminal 1
* M40 rear compartment lid latch - signal circuit terminal 4 and ground circuit terminal 2
6. Verify the scan tool Rear Closure Ajar Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the K9 body control module, ignition ON.
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 K9 body control module.
• If Active
7. Test or replace the M40 rear compartment lid latch or the M30 liftgate latch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate A23 door latch assembly.
2. Test for infinite resistance between the signal terminal and the ground terminals listed below with the switch in the open position.
* A23D door latch assembly-driver - signal terminal 6 and ground terminal 8
* A23P door latch assembly-passenger - signal terminal 1 and ground terminal 3
* A23LR door latch assembly-left rear - signal terminal 6 and ground terminal 8
* A23RR door latch assembly-right rear - 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 3 ohms between the signal and the ground terminal listed below with the switch in the closed position.
* A23D door latch assembly-driver - signal terminal 6 and ground terminal 8
* A23P door latch assembly-passenger - signal terminal 1 and ground terminal 3
* A23LR door latch assembly-left rear - signal terminal 6 and ground terminal 8
* A23RR door latch assembly-right rear - signal terminal 1 and ground terminal 3
• If 3 ohms or greater
Replace the A23 door latch assembly.
• If less than 3 ohms
4. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* 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
* Liftgate Latch Replacement Liftgate Latch Replacement
* Rear Compartment Lid Latch Replacement Rear Compartment Lid Latch Replacement
* Control Module References Control Module References for BCM replacement, programming and setup