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 door lock/window switch and passenger door lock/window switch each provides a 12V signal to their respective door ajar switches located within the door latch assembly. These switches are open when the door is closed and the voltage within the signal circuit will be at 12V. When a door is open, the contacts within the ajar switch close providing a ground path for the signal circuit dropping the voltage to 0. The door lock/widow switch will detect the drop in voltage and will send a serial data message to the BCM indicating the status of the door. When the ignition is ON, the BCM will then send a signal to the driver information center to display the DOOR AJAR message
The BCM provides 12V signal to each a ajar switch located within their respective door latch assemblies. These switches are open when the door is closed and the voltage within the signal circuit will be at 12V. When a door is open, the contacts within the ajar switch close providing a ground path for the signal circuit dropping the voltage to 0. The BCM will detect the drop in voltage and when the ignition is ON, the BCM will then send a signal to the driver information center to display the DOOR AJAR message
Reference Information
Schematic Reference
Interior Lights Schematics Interior Lights 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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Driver Door Ajar Sw. parameter while opening and closing the driver door. The parameter should change between Active and Inactive.
• If the parameter does not change, refer to Driver Door Ajar Malfunction.
2. Observe the scan tool Passenger Door Ajar Sw parameter while opening and closing the right front passenger door. The parameter should change between Active and Inactive
• If the parameter does not change, refer to Passenger Door Ajar Malfunction.
3. Observe the scan tool BCM Left Rear Door Ajar Sw and Right Rear Door Ajar Sw parameters while opening and closing the appropriate rear passenger door. The parameter should change between Door Closed and Door Ajar.
• If the parameter does not change, refer to Rear Door Ajar Malfunction.
Circuit/System Testing
Driver Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the driver door latch.
2. Test for less than 5 ohms between the low reference circuit terminal 8 and ground.
• If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the driver door lock/window switch.
3. Ignition ON, verify the scan tool Driver Door Ajar Sw parameter and 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 driver door lock/window switch.
4. Install a 3A fused jumper wire between the signal circuit terminal 6 and ground, verify the scan tool Driver Door Ajar Sw 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 driver door lock/window switch.
5. If all circuits test normal, test or replace the driver door latch.
Passenger Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the passenger door latch.
2. Test for less than 25 ohms between the low reference circuit terminal 3 and ground.
• If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door lock/window switch
3. Ignition ON, verify the scan tool Passenger Door Ajar Sw parameter and 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 passenger door lock/window switch.
4. Install a 3A fused jumper wire between the signal circuit terminal 1 and ground, verify the scan tool Passenger Door Ajar Sw 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 passenger door lock/window switch.
5. If all circuits test normal, test or replace the passenger door latch.
Rear Door Ajar Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate rear door latch.
2. Test for less than 15 ohms between the ground circuit terminal listed below and ground:
* Left rear door latch ground circuit terminal 6
* 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 scan tool Rear Door Ajar Sw parameter is Door Closed.
• If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM;
* Left rear door latch signal circuit terminal 4
* Right rear door latch signal circuit terminal 1
4. Install a 3A fused jumper wire between the signal circuit terminal and the ground circuit terminal listed below, verify the scan tool Rear Door Ajar Sw parameter is Door Ajar;
* Left rear door latch signal circuit terminal 4 and ground circuit terminal 6
* Right rear door latch signal circuit terminal 1 and ground circuit terminal 3
• 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 BCM.
5. If all circuits test normal, test or replace the door latch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
2. With the switch in the open position, test for infinite resistance between the terminals listed below:
* Driver door latch - signal terminal 6 and low reference terminal 8
* Left rear door latch - signal terminal 4 and ground terminal 6
* Right rear door latch - signal terminal 1 and ground terminal 3
* Passenger door latch - signal terminal 1 and low reference terminal 3
• If not the specified value, replace the door latch assembly.
3. With the switch in the closed position, test for less than 1 ohms between the terminals listed below.
* Driver door latch - signal terminal 6 and low reference terminal 8
* Left rear door latch - signal terminal 4 and ground terminal 6
* Right rear door latch - signal terminal 1 and ground terminal 3
* Passenger door latch - signal terminal 1 and low reference terminal 3
• If greater than the specified range, replace the door latch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Front Side Door Lock Replacement Front Side Door Lock Replacement
* Rear Side Door Lock Replacement Rear Side Door Lock Replacement
* Control Module References Control Module References for the driver door lock/window switch, passenger door lock/window switch, or BCM replacement, setup, and programming.