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:
^ Body Control Module (BCM)
^ Driver Door Module (DDM)
^ Electronic Brake Control Module (EBCM)
^ Inflatable Restraint Sensing And Diagnostic Module (SDM)
^ Instrument Panel Cluster (IPC)
^ Instrument Panel Integration Module (IPM)
^ Memory Seat Module (MSM) W/A45
^ Powertrain Control Module (PCM)
^ Remote Control Door Lock Receiver (RCDLR)
^ Theft Deterrent Control Module
^ Vehicle iNterface Unit (VIU) W/UE1

"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID". RPO Codes