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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 provide a 12V signal to their respective door ajar switch signal circuits. The door ajar switches are integral to each door latch assembly. When a front 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. The appropriate door lock/window switch will detect the voltage drop and send a serial data message to the BCM and the BCM will send a serial data message to the instrument panel cluster to display the door ajar icon.

The body control module (BCM) provides a 12 V signal to each rear door ajar switch signal circuits. When a rear door is opened, the normally open ajar switch closes. With the ajar switch closed, a ground path is provided to the ajar switch signal circuit. The BCM interprets this and communicates via serial data with the instrument panel cluster to display the door ajar icon.

Reference Information

Schematic Reference

Door Lock/Indicator Schematics Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Power Door Latch 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 Sw. 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 Malfunction.

• If the parameter changes

3. Verify the scan tool Passenger Door Ajar Sw. 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 Malfunction.

• If the parameter changes

4. Verify the scan tool Left Rear Door Ajar Sw. parameter changes between Door Closed and Door Ajar when opening and closing the left rear door.

• If the parameter does not change
Refer to Circuit/System Testing - Left Rear Door Ajar Switch Malfunction.

• If the parameter changes

5. Verify the scan tool Right Rear Door Ajar Sw. parameter changes between Door Closed and Door Ajar when opening and closing the right rear door.

• If the parameter does not change
Refer to Circuit/System Testing - Right Rear Door Ajar Switch Malfunction.

• If the parameter changes

6. All OK.

Circuit/System Testing

Driver Door Ajar Switch Malfunction

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 listed below and ground:

* Ground circuit terminal 8 (LHD)

* Ground circuit terminal 3 (RHD)

• 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 Sw parameter is Inactive.

• If not Inactive

1. Ignition OFF, disconnect the harness connector at the Driver Door Lock/Window Switch.

2. Test for infinite resistance between the signal circuit terminal listed below and ground:

* Signal circuit terminal 6 (LHD)

* Signal circuit terminal 1 (RHD)

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the Driver Door Lock/Window Switch.

• If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal and the ground circuit terminal listed below:

* Signal circuit terminal 6 and ground circuit terminal 8 (LHD)

* Signal circuit terminal 1 and ground circuit terminal 3 (RHD)

6. Verify the scan tool Driver Door Ajar Sw. parameter is Active.

• If not Active

1. Ignition OFF, disconnect the harness connector at the Driver Door Lock/Window Switch, 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 Driver Door Lock/Window Switch.

• If Active

7. Test or replace the A23D Door Latch Assembly - Driver.

Passenger Door Ajar Switch Malfunction

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 listed below and ground:

* Ground circuit terminal 8 (RHD)

* Ground circuit terminal 3 (LHD)

• 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 Sw parameter is Inactive.

• If not Inactive

1. Ignition OFF, disconnect the harness connector at the Passenger Door Lock/Window Switch.

2. Test for infinite resistance between the signal circuit terminal listed below and ground:

* Signal circuit terminal 6 (RHD)

* Signal circuit terminal 1 (LHD)

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the Passenger Door Lock/Window Switch.

• If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal and the ground circuit terminal listed below:

* Signal circuit terminal 6 and ground circuit terminal 8 (RHD)

* Signal circuit terminal 1 and ground circuit terminal 3 (LHD)

6. Verify the scan tool Passenger Door Ajar Sw. parameter is Active.

• If not Active

1. Ignition OFF, disconnect the harness connector at the Passenger Door Lock/Window Switch, 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 Passenger Door Lock/Window Switch.

• If Active

7. Test or replace the A23P Door Latch Assembly - Passenger.

Left Rear Door Ajar Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A23LR Door Latch Assembly - Left Rear. 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 6 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 Left Rear Door Ajar Sw. parameter is Door Closed.

• If not Door Closed

1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.

2. Test for infinite resistance between the signal circuit terminal 4 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 Door Closed

5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 6.

6. Verify the scan tool Left Rear Door Ajar Sw. parameter is Door Ajar.

• If not Door Ajar

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 Door Ajar

7. Test or replace the A23LR Door Latch Assembly - Left Rear.

Right Rear Door Ajar Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A23RR Door Latch Assembly - Right Rear. 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 Right Rear Door Ajar Sw. parameter is Door Closed.

• If not Door Closed

1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.

2. Test for infinite resistance between the signal circuit terminal 1 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 Door Closed

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 Right Door Ajar Sw parameter is Door Ajar.

• If not Door Ajar

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 Door Ajar

7. Test or replace the A23RR Door Latch Assembly - Right Rear.

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.

* A23D Door Latch Assembly-Driver (LHD) - signal terminal 6 and ground terminal 8

* A23D Door Latch Assembly-Driver (RHD) - signal terminal 1 and ground terminal 3

* A23P Door Latch Assembly-Passenger (RHD) - signal terminal 6 and ground terminal 8

* A23P Door Latch Assembly-Passenger (LHD) - signal terminal 1 and ground terminal 3

* A23LR Door Latch Assembly-Left Rear - signal terminal 4 and ground terminal 6

* 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 terminals listed below with the switch in the closed position.

* A23D Door Latch Assembly-Driver (LHD) - signal terminal 6 and ground terminal 8

* A23D Door Latch Assembly-Driver (RHD) - signal terminal 1 and ground terminal 3

* A23P Door Latch Assembly-Passenger (RHD) - signal terminal 6 and ground terminal 8

* A23P Door Latch Assembly-Passenger (LHD) - signal terminal 1 and ground terminal 3

* A23LR Door Latch Assembly-Left Rear - signal terminal 4 and ground terminal 6

* 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 repair.

* Front Side Door Latch Replacement (Coupe) Front Side Door Latch Replacement (Coupe)Front Side Door Latch Replacement (Sedan/Wagon) Front Side Door Latch Replacement (Sedan/Wagon)

* Rear Side Door Latch Replacement Service and Repair

* Control Module References Control Module References for the BCM, driver door lock/window switch, passenger driver door lock/window switch replacement, setup and programming

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