Power Locks: Description and Operation

Power Door Locks Description and Operation

Door Lock System Components

The power door lock system consists of the following components:

* Door lock switch, located in the hazard lamp switch in the center of the instrument panel
* Body control module (BCM)
* Driver door latch
* Passenger door latch
* Left rear door latch
* Right rear door latch

Door Lock and Unlock Operation

When a door lock switch is activated in the lock or unlock position the BCM will receive a ground signal on either the door lock switch lock or unlock signal circuits.

The BCM, upon receipt of a lock switch lock or unlock signal, will supply battery voltage to the door lock actuator lock or unlock control circuits. Since the opposite side of the lock actuator is connected to ground through the other lock actuator control circuit, the doors will then lock or unlock as commanded.

The following three circuits are used to operate the lock:

* Driver door unlock
* Passenger door unlock
* All door lock

The driver door lock actuator is isolated so it can be unlocked by itself using the keyless entry transmitter.