Class 2 Serial Data Link

The class 2 serial data communications circuit is provided at Pin 2 of the DLC.

The class 2 serial data link allows the following modules to communicate and share data with each other:
^ Powertrain Control Module (PCM)
^ Inflatable Restraint Sensing And Diagnostic Module (SDM)
^ Theft deterrent control module
^ Vehicle Interface Unit (VIU)

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