• | 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. |
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 |
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.
The system voltage is 9-16 volts.
The BCM detects a short to ground in the driver door ajar circuit for longer than 10 minutes.
The ajar indicator is on at all times.
• | 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. |
Door Lock/Indicator Schematics
Door Ajar Indicator Description and Operation
Control Module References for scan tool information
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.
⇒ | 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) |
• | 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. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |