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• | 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 | 1 | 2 | 1 | -- |
Left Rear Door Ajar Switch Signal | 1 | 2 | 1 | -- |
Right Front Door Ajar Switch Signal | 1 | 2 | 1 | -- |
Right Rear Door Ajar Switch Signal | 1 | 2 | 1 | -- |
Driver Door Latch Ground | -- | 2 | -- | -- |
Passenger Door Latch Ground | -- | 2 | -- | -- |
Left Rear Door Latch Ground | -- | 2 | -- | -- |
Right Rear Door Latch Ground | -- | 2 | -- | -- |
1. Ajar Indicator Always Illuminated 2. Ajar Indicator Inoperative |
The driver window motor, the passenger window switch, left rear and right rear window switch each supplies a 12V signal to each of their respective door ajar switches. 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 window motor and/or window switch interprets this and communicates door status via serial data to the BCM.
Door Lock/Indicator Schematics
Door Ajar Indicator 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 a 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 6 for a short to ground. If the circuit tests normal, replace the M74D window motor - driver. |
⇒ | 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 M74D window motor - driver. |
⇒ | 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 S79P Window Switch - Passenger. |
⇒ | 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 S79P Window Switch - Passenger. |
• | Left rear door latch ground circuit terminal 8 |
• | 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 rear S79 window switch. |
• | Left rear door ajar switch signal circuit terminal 6 |
• | Right rear door ajar switch signal circuit terminal 1 |
• | Left rear door ajar switch signal circuit terminal 6 |
• | Right rear door ajar switch signal circuit terminal 1 |
⇒ | If not the specified value, test the signal circuit terminal listed below for an open/high resistance. If the circuit tests normal, replace the rear S79 window switch. |
• | Driver door latch signal terminal 6 and ground terminal 8 |
• | Left rear door latch signal terminal 6 and ground terminal 8 |
• | 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 A23 door latch. |
• | Driver door latch signal terminal 6 and ground terminal 8 |
• | Left rear door latch signal terminal 6 and ground terminal 8 |
• | 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 A23 door latch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, programming and setup |
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