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
The driver window motor supplies a reference voltage to the driver door ajar switch and the passenger window motor supplies a reference voltage to the passenger door ajar switch. The door ajar switches are normally open when the doors are fully closed. When a door is opened, the door ajar switch contacts close providing a path to ground. The respective window motor detects the drop in the reference voltage and will send a serial data message to the body control module (BCM) indicating the door is ajar, the BCM in turn sends a serial data message to the driver information center which displays the appropriate door ajar message.
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
Power Door Locks 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 - Driver 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 - Passenger Door Ajar Switch
• If the parameter changes
4. All OK.
Circuit/System Testing
Driver Door Ajar Switch
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A23D door latch assembly-driver. 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 8 and ground.
• 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 Driver Door Ajar Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver
2. Test for infinite resistance between the signal circuit terminal 6 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74D window motor-driver.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 8.
6. Verify the scan tool Driver Door Ajar Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver, 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 M74D window motor-driver.
• If Active
7. Test or replace the A23D door latch assembly-driver.
Passenger Door Ajar Switch
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A23P door latch assembly-passenger. 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 3 and ground.
• 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 Passenger Door Ajar Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger.
2. Test for infinite resistance between the signal circuit terminal 6 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74P window motor-passenger.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 3.
6. Verify the scan tool Passenger Door Ajar Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger, 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 M74P window motor-passenger.
• If Active
7. Test or replace the A23P door latch assembly-passenger.
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 4 and the ground terminal 2 with the switch in the open position.
* Signal terminal 6 and ground terminal 8 - A23D door latch assembly-driver
* Signal terminal 1 and ground terminal 3 - A23P door latch assembly-passenger
• 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.
* Signal terminal 6 and ground terminal 8 - A23D door latch assembly-driver
* Signal terminal 1 and ground terminal 3 - A23P door latch assembly-passenger
• 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
* Front Side Door Window Regulator Motor Replacement Service and Repair