Class 2 Communications

The Class 2 serial data link allows modules to transmit, receive, or exchange data.
^ Electronic Brake Control Module (EBCM)
^ Powertrain Control Module (PCM)
^ Vehicle Theft Deterrent (VTD)

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.

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

The scan tool is also supplied power and ground at the DLC.