Driver Door Module (DDM)

The Drivers Door Module (DDM) directly controls the driver's door lock actuator motor. The DDM receives and forwards drivers door switch lock request messages to the Remote Function Actuator (RFA) via serial data link. The RFA receives the request message and examines for lockout prevention criteria. if conditions are proper, the RFA sends a lock or unlock command message back to the DDM. The DDM forwards door lock messages received from the Remote Function Actuator (RFA) to the Passenger Door Module (PDM) and Rear Door Module (RDM) modules over a Simple Bus Interface (SBI) line. The DDM also contains a Class 2 serial interface which communicates with other vehicle system modules. The LH front door power window and power outside rear view mirror are also controlled through the DDM. Battery voltage is always applied to the Drivers Door Module through the Retained Accessory Power (RAP) circuit breaker located in the Underhood MaxiFuse (R) Block.