Class 2 Serial Data Link
WARNING: This page is about a different car, the 2004 Buick Regal and 2004 Buick Century. 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 data link connector (DLC).
The class 2 serial data link allows the following modules to communicate and share data with each other:
- Body control module (BCM)
- Electronic brake control module (EBCM)
- HVAC control module (w/CJ2)
- Inflatable restraint sensing and diagnostic module (SDM)
- Instrument panel cluster (IPC)
- Powertrain control module (PCM)
- Vehicle communications interface module (VCIM), if equipped
The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes.