Key Cylinder Unlock (RPO UA6)

The BCM unlocks all of the vehicle doors when you unlock a door using a door key cylinder. Unlocking a door using either key cylinder lock sends a ground signal to the BCM through CKT 781. Holding the key in the unlock position for 1 second causes the BCM to apply voltage in CKT 694 and CKT 294 for 315-385 ms. This action will energize all of the door actuators. Energized door actuators unlock all of the vehicle doors.