Information Bus: Description and Operation

The Class 2 serial data link allows specified modules to transmit, receive, or exchange data:
^ Transfer Case Shift Control Module (TCSCM)
^ Electronic Brake Control Module (EBCM)
^ Powertrain Control Module (PCM)
^ Body Control Module (BCM)
^ Instrument Panel Cluster (IPC)
^ Driver Information Center (DIC)
^ Inflatable Restraint Sensing And Diagnostic Module (SDM)

The Class 2 serial data link allows a scan tool to communicate with these modules for testing purposes, checking for DTCs, and to activate/enable/disable functions. These communication circuits are bussed together via SP261 which ensures a connection between the Class 2 communication circuits.

The DLC has a ground for the class 2 serial data signal exiting the Scan Tool.

The Scan Tool is also supplied battery positive voltage and battery negative voltage at the DLC.