• | 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 | -- |
Left Rear Door Ajar Switch Signal | 2 | 1 | 1 | -- |
Right Front Door Ajar Switch Signal | 2 | 1 | 1 | -- |
Right Rear Door Ajar Switch Signal | 2 | 1 | 1 | -- |
Driver Door Latch Ground | -- | 1 | -- | -- |
Passenger Door Latch Ground | -- | 1 | -- | -- |
Left Rear Door Latch Ground | -- | 1 | -- | -- |
Right Rear Door Latch Ground | -- | 1 | -- | -- |
1. Ajar Indicator Always Illuminated 2. Ajar Indicator Inoperative |
The driver door module (DDM) and passenger door module (PDM) each receive a discrete input from there respective door ajar switch signal circuits. The body control module (BCM) receives discrete inputs from each of the rear 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 door modules and/or BCM interprets this and communicates via serial data with the instrument panel cluster (IPC).
Door Lock/Indicator Schematics
Power Door Latch Description and Operation
Control Module References for scan tool information
⇒ | If the value does not change, refer to Driver Door Ajar Switch Malfunction |
⇒ | If the value does not change, refer to Passenger Door Ajar Switch Malfunction. |
⇒ | If the appropriate value does not change, refer to Rear Door Ajar Switch Malfunction. |
⇒ | 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 4 for a short to ground. If the circuit tests normal, replace the DDM. |
⇒ | 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 DDM. |
⇒ | 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 PDM. |
⇒ | 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 PDM. |
• | Left rear door latch ground circuit terminal 6 |
• | Right rear door latch ground circuit terminal 3 |
⇒ | 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 listed below for a short to ground. If the circuit tests normal, replace the BCM. |
• | Left rear door ajar switch signal circuit terminal 4 |
• | Right rear door ajar switch signal circuit terminal 1 |
• | Left rear door ajar switch signal circuit terminal 4 |
• | Right rear door ajar switch signal circuit terminal 1 |
⇒ | 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 |
• | Left rear door latch signal terminal 4 and ground terminal 6 |
• | Right rear door latch signal terminal 1 and ground terminal 3 |
• | 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 |
• | Left rear door latch signal terminal 4 and ground terminal 6 |
• | Right rear door latch signal terminal 1 and ground terminal 3 |
• | 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, DDM, PDM or DIC replacement, setup and programming |