• | 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 |
---|---|---|---|---|
Left Front Door Ajar Switch Signal | 2 | 1 | 1 | -- |
Right Front Door Ajar Switch Signal | 2 | 1 | 1 | -- |
Driver Door Latch Ground | -- | 1 | 1 | -- |
Passenger Door Latch Ground | -- | 1 | 1 | -- |
1. Door Ajar Indicator Always Off 2. Door Ajar Indicator Always Illuminated |
The body control module (BCM) receives a discrete input from the driver and passenger door ajar switch signal circuits. The door ajar switches are integral to each door latch assembly. When a 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 BCM interprets this and sends a serial data message to the instrument panel cluster (IPC). When a door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display DOOR AJAR for the appropriate door that is opened. If the door is still ajar and the vehicles speed is greater than 5 km/h (3 mph) a chime will sound.
Door Lock/Indicator Schematics
Control Module References for scan tool information
⇒ | If the parameter does not change, refer to Driver Door Ajar Malfunction. |
⇒ | If the parameter changes but the DRIVER DOOR AJAR indicator is always ON or always OFF, replace the IPC. |
⇒ | If the parameter does not change, refer to Passenger Door Ajar Malfunction. |
⇒ | If the parameter changes but the PASSENGER DOOR AJAR indicator is always ON or always OFF, replace the IPC. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the BCM. |
⇒ | 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. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM. |
⇒ | 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. |
• | Driver door latch signal terminal 6 and ground terminal 8 |
• | Passenger door latch signal terminal 1 and ground terminal 3 |
⇒ | If not the specified value, replace the door latch. |
• | Driver door latch signal terminal 6 and ground terminal 8 |
• | Passenger door latch signal terminal 1 and ground terminal 3 |
⇒ | If greater than the specified range, replace the door latch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM or IPC replacement, setup and programming |