Class 2 Serial Data Link

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.