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 (Connector End Views By Name)
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 (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Driver Door Ajar Switch parameter while opening and closing the driver door. The parameter should change between Inactive and Active.
• If the value does not change, refer to Driver Door Ajar Malfunction
2. Observe the scan tool Passenger Door Ajar Switch parameter while opening and closing the passenger door. The parameter should change between Inactive and Active.
• If the value does not change, refer to Passenger Door Ajar Malfunction.
Circuit/System Testing
Driver Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the A23D door latch assembly-driver.
2. Ignition ON, test for less than 10 ohm between the ground circuit terminal 8 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. 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 3A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 8. 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 Malfunction
1. Ignition OFF, disconnect the harness connector at the A23P door latch assembly-passenger.
2. Test for less than 5 ohm 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 3A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 3. 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.
Component Testing
Door Ajar Switch
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:
* A23D door latch assembly-driver terminal 6 and terminal 8
* A23P door latch assembly-passenger terminal 1 and terminal 3
• If not the specified value, replace the door latch.
3. Test for less than 2.0 ohms between the terminals listed below with the switch in the closed position:
* A23D door latch assembly-driver terminal 6 and terminal 8
* A23P door latch assembly-passenger terminal 1 and terminal 3
• If greater than the specified range, replace the A23 door latch-assembly.
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 (Front Side Door Window Regulator Motor Replacement)