Information Bus: Description and Operation

The class 2 serial data link allows the following modules to communicate data with each other:
^ Electronic Brake Control Module (EBCM)
^ Instrument Panel Cluster (IPC)
^ Powertrain Control Module (PCM)
^ Inflatable Restraint Sensing and Diagnostic Module (SDM).

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