Normal Operation

The Remote Function Actuator (RFA) module sends voltage signals to the passenger door lock control switch through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the RFA module to lock or unlock all of the doors and send a lock or unlock command to the Driver Door Module (DDM) over the Medium Speed Controller Area Network (MS-CAN).

The DDM sends voltage signals to the driver door lock control switch through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground, signaling the DDM to send a lock or unlock command to the RFA module over the MS-CAN.

The door lock control switches have a dedicated ground circuit.