For 1990-2009 cars

## Door Ajar Indicator Malfunction Without RPO AXC/AXE

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Door Ajar Signal | B2976 00 | 1 | -- | --
Door Ajar Ground | -- | 1 | 1 | --
1. Door Ajar Indicator Inoperative

### Circuit/System Description

The body control module (BCM) receives a discrete input from the respective jamb switch to indicate the status of the door. The BCM then communicates this status to the instrument panel cluster (IPC) via a serial data message. The IPC, upon receipt of this serial data message, will illuminate the appropriate ajar message in the driver information center (DIC) and also send a serial data massage to the radio to activate the door ajar audible warning when the transmission is removed from PARK and the vehicle speed is greater then 8 km/h (5 mph).

The door ajar switches supply a ground to the BCM when the door is open. Once the door is closed the door ajar switch opens removing the ground to the BCM. The BCM sends a signal to the IPC to turn on the door ajar light when a door is open.

### Reference Information

#### Schematic Reference

Door Lock/Indicator Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Door Ajar Indicator Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, with all doors closed, observe the scan tool Driver Door Ajar Sw., Passenger Door Ajar Sw., Left Rear Door Ajar Sw. and Right Rear Door Ajar Sw. parameters while opening and closing each door. The parameters should change between Door Closed and Door Ajar.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
2. Test for less than 1.0 ohm between ground circuit terminal listed below and ground:

• | Driver door latch terminal 8

• | Left rear door latch terminal 6

• | Passenger door latch terminal 3

• | Right rear door latch terminal 3

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the appropriate scan tool 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.

• | Driver door latch terminal 6

• | Left rear door latch terminal 4

• | Passenger door latch terminal 1

• | Right rear door latch 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 Door Ajar Sw. parameter is Door Ajar.

• | Driver door latch terminal 6 and terminal 8

• | Left rear door latch terminal 4 and terminal 6

• | Passenger door latch terminal 1 and terminal 3

• | Right rear door latch terminal 1 and 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 signal terminal and the ground terminal listed below:

• | Driver door latch terminal 6 and terminal 8.

• | Left rear door latch terminal 4 and terminal 6.

• | Passenger door latch terminal 1 and terminal 3.

• | Right rear door latch terminal 1 and terminal 3.

⇒ | If not the specified value, replace the door latch.

3. With the switch in the closed position, test for less than 2.0 ohms between the signal and the ground terminals listed below:

• | Driver door latch terminal 6 and terminal 8.

• | Left rear door latch terminal 4 and terminal 6.

• | Passenger door latch terminal 1 and terminal 3.

• | Right rear door latch terminal 1 and terminal 3.

⇒ | If not the specified value, replace the door latch.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Front Side Door Latch Replacement

• | Rear Side Door Latch Replacement

• | Control Module References for BCM replacement, setup, and programming

## Door Ajar Indicator Malfunction With RPO AXC/AXE

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
LR Door Ajar Signal | B2976 00 | 2 | -- | --
RR Door Ajar Signal | B2976 00 | 2 | -- | --
LF Door Ajar Signal | 1 | 2 | -- | --
RF Door Ajar Signal | 1 | 2 | -- | --
Door Ajar Ground | -- | 2 | 2 | --
1. Door Ajar Indicator Always On 2. Door Ajar Indicator Inoperative

### Circuit/System Description

The driver door module (DDM) and the passenger door module (PDM) receive a discreet input from the driver door ajar switch and the passenger door ajar switch respectively. Likewise, the body control module (BCM) receives a discrete input from both the left and right rear door ajar switches. The door ajar switches are normally open when the doors are fully closed. When a door is open, the door ajar switch contacts close providing a path to ground. The driver information center (DIC) displays the appropriate door open message when one of the doors is open. The instrument panel cluster (IPC) receives a serial data message from either the BCM, DDM or PDM indicating the door ajar status. If the message is displayed and the vehicle speed is greater than 8 km/h (5 mph), a chime will sound as a reminder of the door ajar status.

### Reference Information

#### Schematic Reference

Door Lock/Indicator Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Door Ajar Indicator Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Ignition ON, with all doors closed, observe the scan tool Left Rear Door Ajar Switch parameter and Right Rear Door Ajar Switch parameter while opening and closing the rear doors. The parameter should change between Door Closed and Door Ajar.

⇒ | If the value does not change, refer to Rear Door Ajar Switch Malfunction.

2. Observe the scan tool Driver Door Ajar Sw parameter and Passenger Door Ajar Sw. parameter while opening and closing the driver door and front passenger door. The parameter should change between Active and Inactive.

⇒ | If the value does not change, refer to Front Door Ajar Switch Malfunction.

### Circuit/System Testing

#### Rear Door Ajar Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate rear door latch assembly.
2. Test for less than 1.0 ohm between ground circuit terminal listed below and ground:

• | Left Rear door latch assembly ground circuit terminal 6

• | Right Rear door latch assembly 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 Switch 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 assembly signal circuit terminal 4

• | Right Rear door latch assembly signal circuit terminal 1

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

• | Left Rear door latch assembly signal circuit terminal 4 and ground circuit terminal 6

• | Right Rear door latch assembly signal circuit terminal 1 and ground circuit terminal 3

5. Verify the scan tool Rear Door Ajar Switch parameter is Door Ajar.

⇒ | 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.

6. If all circuits test normal, test or replace the rear door latch assembly.

#### Front Door Ajar Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate front door latch assembly.
2. Test for less than 5.0 ohms between low reference circuit terminal listed below and ground:

• | Driver door latch assembly ground circuit terminal 8.

• | Passenger door latch assembly ground circuit terminal 3.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door module.

3. Ignition ON, verify the scan tool Door Ajar Sw. parameter is Inactive.

⇒ | If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the door module.

• | Driver door latch assembly signal circuit terminal 6

• | Passenger door latch assembly signal circuit terminal 1.

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

• | Driver door latch assembly signal circuit terminal 6 and ground circuit terminal 8

• | Passenger door latch assembly signal circuit terminal 1 and ground circuit terminal 3.

5. Verify the scan tool Rear Door Ajar Switch parameter is Door Ajar.

⇒ | 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 door module.

6. If all circuits test normal, test or replace the front door latch assembly.

### Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
2. With the switch in the open position, test for infinite resistance between the signal and the ground terminals listed below:

• | Driver door latch assembly signal terminal 6 and ground terminal 8

• | Left Rear door latch assembly signal terminal 4 and ground terminal 6

• | Passenger and Right Rear door latch assembly signal terminal 1 and ground terminal 3

⇒ | If not the specified value, replace the door latch assembly.

3. With the switch in the closed position, test for less than 1.0 ohms between the signal and the ground terminals listed below.

• | Driver door latch assembly signal terminal 6 and ground terminal 8

• | Left Rear door latch assembly signal terminal 4 and ground terminal 6

• | Passenger and Right Rear door latch assembly signal terminal 1 and ground terminal 3

⇒ | If greater than the specified range, replace the door latch assembly.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Front Side Door Latch Replacement

• | Rear Side Door Latch Replacement

• | Control Module References for BCM, DDM and PDM replacement, setup, and programming