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 instrument panel center stack
• 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/rear doors unlock
• All door lock
The driver door lock actuator is isolated so it can be unlocked by itself using the keyless entry transmitter.
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