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 | 1 | 1 | -- |
Passenger Door Ajar Signal | B2991 00 | 1 | 1 | -- |
Driver Door Latch Ground | -- | 1 | 1 | -- |
Passenger Door Latch Ground | -- | 1 | 1 | -- |
1. Door Ajar Indicator Inoperative | ||||
Circuit/System Description
The body control module (BCM) receives a discrete input from driver and passenger jamb switches. 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 ajar indicator 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 than 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 illuminate the door ajar indicator when a door is open.
Conditions for Running the DTC
The system voltage is 9-18 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 door 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 door ajar indicator on the I/P while opening and closing the driver door. The indicator should turn ON and OFF when opening and closing the driver door.
Circuit/System Testing
- Ignition OFF, disconnect harness connector at the driver door latch assembly.
- Test for less than 10 ohms between the ground circuit terminal 8 and ground.
- Ignition ON, verify the door ajar indicator is not illuminated.
- Install a 3A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 8. Verify that the door ajar indicator is illuminated.
- If all circuit tests normal, test or replace the driver door latch assembly.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the indicator is illuminated, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the indicator is not illuminated, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
Component Testing
- Ignition OFF, disconnect the harness connector at the driver door latch assembly.
- With the switch in the open position, test for infinite resistance between the signal terminal 6 and the ground terminal 8.
- With the switch in the closed position, test for less than 1.0 ohm between the signal terminal 6 and the ground terminal 8.
| ⇒ | If not the specified value, replace the driver door latch assembly. |
| ⇒ | If not the specified value, replace the driver door latch assembly. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
