Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
BCM B+ | 1,2 | 1,2 | 1,2 | -- |
Driver Door Lock Switch Lock Signal | 3 | 3 | 3 | -- |
Driver Door Lock Switch Unlock Signal | 3 | 3 | 3 | -- |
Passenger Door Lock Switch Lock Signal | 3 | 3 | 3 | -- |
Passenger Door Lock Switch Unlock Signal | 3 | 3 | 3 | -- |
Driver Door Lock Actuator Unlock Control | 1,2 | 1,2 | 1,2 | -- |
Door Lock Actuator Unlock Control | 1,2 | 1,2 | 1,2 | -- |
Door Lock Actuator Lock Control | 1,2 | 1,2 | 1,2 | -- |
Door Lock Switch Ground | -- | 3 | 3 | -- |
1. Front Door/Liftgate Lock Malfunction 2. Sliding Door Lock Malfunction 3. Door Lock Switch Malfunction |
The passenger doors include the passenger front door, the passenger rear sliding doors, and the liftgate door. When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the unlock position.
Door Lock/Indicator Schematics
Power Door Systems Connector End Views
Power Door Locks Description and Operation
⇒ | If the value does not change, refer to Passenger Door Lock Switch Malfunction. |
⇒ | If the passenger door does not UNLOCK or LOCK, refer to Passenger Door Lock 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 D for a short to ground. If the circuit tests normal, replace the BCM. |
⇒ | If not the specified value, test the signal circuit terminal E 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 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 control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the BCM. |
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the BCM. |
⇒ | If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuit. If the circuits test normal, replace the BCM. |
⇒ | If not the specified value, replace the passenger door lock switch. |
⇒ | If not the specified value, replace the passenger door lock switch. |
⇒ | If greater than the specified range, replace the passenger door lock switch. |
⇒ | If greater than the specified range, replace the passenger door lock switch. |
⇒ | If it does not perform as specified, replace the passenger door latch assembly. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup and programming. |