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. |
DTC Descriptor
DTC B2976 00: Driver Door Ajar CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Ajar Signal | B2976 00 | 2 | -- | -- |
Passenger Door Ajar Signal | 1 | 2 | -- | -- |
RR Door Ajar Signal | 1 | 2 | -- | -- |
LR 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 body control module (BCM) receives a discrete input from each of the 4 jamb switches to indicate the status for each 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 warming 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.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
The BCM detects a short to ground in the driver door ajar circuit for longer than 10 minutes.
Action Taken When the DTC Sets
The ajar indicator is on at all times.
Conditions for Clearing the DTC
| • | The DTC will be current for as long as the fault is present. |
| • | When the fault is no longer present, the DTC will become a history DTC. |
| • | A history DTC will clear after 50 ignition cycles. |
Reference Information
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Description and Operation
Door Ajar Indicator Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Driver Door Ajar Sw parameter while opening and closing the driver door. The parameter should change between Door Closed and Door Ajar.
Circuit/System Testing
- Ignition OFF, disconnect harness connector at the driver door lock.
- Ignition ON, verify the scan tool Driver Door Ajar Sw parameter is Door Closed.
- If all circuits test normal, test or replace driver door lock.
| ⇒ | 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. |
| • | Signal circuit terminal 4 (without RPO AU3) |
| • | Signal circuit terminal 6 (with RPO AU3) |
Component Testing
- Ignition OFF, disconnect the harness connector at the driver door lock.
- With the switch in the open position, test for infinite resistance between the signal terminal and the ground terminal listed below:
- With the switch in the closed position, test for less than 2 ohms between the signal terminal and the ground terminal listed below:
| • | Signal terminal 6 and ground terminal 8 (with RPO AU3). |
| • | Signal terminal 4 and ground terminal 6 (without RPO AU3). |
| ⇒ | If not the specified value, replace the driver door lock. |
| • | Signal terminal 6 and ground terminal 8 (with RPO AU3). |
| • | Signal terminal 4 and ground terminal 6 (without RPO AU3). |
| ⇒ | If greater than the specified range, replace the driver door lock. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
