The instrument cluster locks or unlocks the doors when an actuation input signal from a door lock switchor a Controller Area Network (CAN) message from the Driver Door Module. The instrument cluster turns on the output drivers and provides a voltage level to the door lock motor for a specified time. All passenger doors can be locked or unlocked using a mechanical button mounted on the door trim panel. The driver's door can be locked or unlocked by using the key cylinder. Because of the complex electronic modules and bus communication system between the modules, it is my suggestion to have the qualified technicians at your local dealership inspect and diagnosis your concerns.