Serial Data Class 2 Link

The Serial Data Class 2 line is a serial data link. The serial data link replace cables in the vehicle by multiplexing (time-sharing) data to and from each device over a single wire referenced to ground. If the Serial Data Class 2 link is lost, both Rear Door Modules, (RRDM) and (LRDM), and the Passenger Front Door Module (PFDM) enters the sleep mode. With the RRDM, the LRDM, and the PFDM in sleep mode, no power door lock operations are possible.