Class 2 Serial Data Link
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
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.