Information Bus: Description and Operation

The class 2 serial data link allows the following modules to communicate and share data with each other:
^ Auxiliary Power Drop Connector
^ Body Control Module (BCM)
^ Driver Information Center (DIC)
^ Electronic Brake Control Module (EBCM)
^ Instrument Panel Cluster (IPC)
^ Powertrain Control Module (PCM)
^ Radio
^ Remote Playback Device-CD Player (if equipped with UQ3)
^ Inflatable Restraint Sensing and Diagnostic Module (SDM)
^ Vehicle Interface Unit (VIU) (if equipped)

The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes

"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