Driver Door Switch Assembly

The Driver Door Switch Assembly (DDSA) is a multiplexed switch device that communicates with the driver door module (DDM) via the Simple Bus Interface (SBI) serial data line. It has a window switch for each of the vehicles doors built into it, as well as switches to control the outside rearview mirrors and other door functions. When one of these power window switches is operated, the DDSA reports the switch activity to the DDM The DDM then supplies power and ground to its associated power window motor, or, sends a message over the SBI serial data line to the appropriate door module to operate its associated window motor.

Battery positive voltage and ground to power up the DDSA are supplied by the DDM.