Information Bus: Description and Operation

DATA LINK CONNECTOR (DLC)
The data link connector (DLC) terminal 2 contains the class 2 serial data link.
The DLC also provides a power source for the scan tool as follows:
^ Battery voltage at the DLC terminal 16 (circuit 1440).
^ Ground at terminal 4 (circuit 150). Ground at terminal 5 (circuit 451).

CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate with each other:
^ The Body Control Module (BCM)
^ The Electronic Brake Control Module (EBCM) The Integrated Radio Chassis (IRC)
^ The Powertrain Control Module (PCM)
^ The 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.