Data Link Communications Circuit

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) and 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 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.