Simple Bus Interlace (Sbi) Serial Data Link

The Simple Bus Interface (SBI) is a serial data link. This serial data link replaces vehicle cables between various door modules with a single wire. The same amount of information is sent by multiplexing (time-sharing) data to and from each device over that wire. The serial data signals are referenced to ground. If the SBI is lost, both the Rear Door Module (RDM) and the Passenger Door Module (PDM) will enter the sleep mode. With the RDM and PDM in sleep mode, no power window operations are possible.