Power Locks: Description and Operation

POWER DOOR LOCK SYSTEM
When the BCM receives input for a lock request from a door lock switch, RKE or cylinder lock switch (only with VTSS), it will turn the lock driver on for a specified time of 375 msec. If the request is there beyond 375 msec, the BCM considers the door lock signal stuck. Once a door lock or unlock signal is stuck for longer than 10 seconds, the BCM will set a trouble code and the signal input is ignored until the stuck condition disappears. The door lock switches provide a variable amount of resistance thereby dropping the voltage of the multiplexed (MUX) circuit and the BCM will respond to that command.

Sliding Door Memory Lock
When the BCM receives an input for a lock request and a sliding door is open, the BCM will turn ON the lock driver as described above, and will turn it ON again when all sliding doors are closed. NOTE: If the BCM receives an unlock input before a sliding door is closed, this will cancel the memory lock.

Door Lock Inhibit
When the key is in the ignition and in any position and either front door is open, the door lock switches LOCK functions are disabled. The UNLOCK functions are still functional. This protects against locking the vehicle with the keys still in the ignition. The RKE key fob will still lock the doors as usual. This allows the driver to lock the vehicle with the engine running for warm up.

Automatic Door Locks
This feature can be enabled or disabled by using either the DRBIII(R) or the customer programming method. When enabled all the doors will lock when the vehicle reaches a speed of 18 MPH (29 KMH) and all the doors are closed. If a door is opened and the vehicle slows to below 18 MPH (29 KMH), the door locks will operate again once all doors are closed and the speed is above 15 MPH (24 KMH).