Class 2 Serial Data Line

A total list of the control modules on the class 2 serial data line can include the following:
^ The audio amplifier
^ The cellular telephone module W/UV8
^ The Dash Integration Module (DIM)
^ The digital radio receiver
^ The Driver Door Module (DDM)
^ The Driver Door Switch Assembly (DDSA)
^ The Electronic Brake Control Module (EBCM)
^ The Electronic Suspension Control Module (ESC)
^ The Front Passenger Door Module (FPDM)
^ The inflatable restraint Sensing And Diagnostic Module (SDM)
^ The Instrument Panel Cluster (IPC)
^ The Instrument Panel Integration Module (IPM)
^ The HVAC control module - auxiliary
^ The Left Middle Door Module (LMDM) W/V4U
^ The Left Rear Door Module (LRDM)
^ The Memory Seat Module (MSM) W/A45
^ The Powertrain Control Module (PCM)
^ The radio
^ The Rear Integration Module (RIM)
^ The Remote Control Door Lock Receiver (RCDLR)
^ The remote playback device CD changer
^ The Right Middle Door Module (RMDM) W/V4U
^ The Right Rear Door Module (RRDM)
^ The steering column module
^ The theft deterrent control module
^ The Vehicle Communication Interface Module (VCIM)
^ The window switch - front passenger W/armored car

The class 2 serial data line is a ring/star configuration with discrete circuits entering and leaving each module. This allows communications to the modules on the ring portion of the class 2 serial data circuit if one of the 2 discrete circuits is open.

The following modules are on the ring portion of the class 2 serial data circuit. Therefore if there is an open in the class 2 serial data circuit communication will still occur:
^ The dash integration module (DIM)
^ The digital radio receiver
^ The electronic brake control module (EBCM)
^ The inflatable restraint sensing and diagnostic module (SDM)
^ The instrument panel cluster (IPC)
^ The instrument panel integration module (IPM)
^ The Powertrain Control Module (PCM)
^ The radio
^ The remote playback device CD changer

The following modules are connected to the star portion of the class 2 serial data circuit by splice packs and have only one communication line connection to the class 2 serial data circuit. Therefore if the class 2 serial data line is open to any of these modules communication will not occur:
^ The audio amplifier
^ The cellular telephone module W/UV8
^ The driver door module (DDM)
^ The driver door switch assembly (DDSA)
^ The electronic suspension control module
^ The front passenger door module (FPDM)
^ The HVAC control module - auxiliary
^ The left middle door module (LMDM) W/V4U
^ The left rear door module (LRDM)
^ The memory seat module (MSM) W/A45
^ The rear integration module (RIM)
^ The remote control door lock receiver (RCDLR)
^ The right middle door module (RMDM) W/V4U
^ The right rear door module (RRDM)
^ The steering column module W/N37
^ The theft deterrent control module
^ The vehicle communication interface module (VCIM)
^ The window switch - front passenger W/armored car

"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