Class 2 Serial Data Circuit

The data link 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 Circuit can include the following:
^ Dash Integration Module (DIM)
^ Driver Door Module (DDM)
^ Driver Information Center (DIC)
^ 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) with A45
^ Powertrain Control Module (PCM)
^ Radio
^ Rear Integration Module (RIM)
^ Remote Control Door Lock Receiver (RCDLR)
^ Remote Playback Device - CD Changer if equipped with U1S
^ Theft Deterrent Control Module
^ Vehicle Interface Unit (VIU)

The following modules have only one communication line connection to the Class 2 serial data circuit:
^ Memory Seat Module (MSM)
^ Driver Door Module (DDM)
^ Vehicle Interface Unit (VIU)

"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