Power Door Lock Deadbolt Operation

Vehicles equipped with the deadbolt feature include an additional reversible deadbolt motor contained within each door latch assembly. Each deadbolt motor is wired to the BCM through 2 control circuits; the door lock deadbolt control circuit and the door lock actuator unlock control circuit. To deadbolt a door, the door locks are activated by momentarily applying voltage to the door lock deadbolt control circuits, and ground to the door lock actuator unlock control circuits. Ground to the deadbolt actuators is provided through the door lock actuator unlock control circuits. Once the doors are deadbolted, the mechanical lock/unlock linkage within the door lock actuator is physically disconnected so that the door can not be manually unlocked. If the content theft feature is armed at the same time, the interior door lock switches will not operate the locks.

To undeadbolt the doors, the BCM unlocks the doors by momentarily applying ground to the deadbolt motor unlock control circuit. This energizes the rear door unlock relay coil causing voltage to flow through the switch contacts to the door lock and deadbolt motors. Ground for both motors is supplied through the door lock motor lock circuit through the normally closed contacts of the lock relay to ground.

By performing the following actions, the doors can be locked and deadbolted or unlocked using the keyless entry transmitter:

• Press the keyless entry transmitter lock button once to lock all doors, then press a second time within 3 seconds to deadbolt all doors.
• Press the keyless entry transmitter unlock button once to unlock the driver door, then press a second time within 3 seconds to unlock all passenger doors.