Class 2 Serial Data Line

The data line is configured as a ring with discrete lines entering and leaving each module. This allows communications to the modules on the ring if one of the two discrete circuits is open.

A total list of the control modules on the Class 2 Serial Data Line can include the following:
^ Powertrain Control Module (PCM)
^ Electronic Brake Control Module (EBCM)
^ Remote Control Door Lock Receiver (RCDLR)
^ Inflatable Restraint Sensing and Diagnostic Module (SDM)
^ Memory Seat Module (MSM), if equipped with A43
^ Instrument Panel Integration Module (IPM)
^ Instrument Panel Cluster (IPC)
^ Theft Deterrent Control Module
^ Driver Door Module (DDM)
^ Body Control Module (BCM)