For 1990-2009 cars

### Data Link Connector (DLC)

The data link connector (DLC) terminal 2 contains the class 2 serial data link.

The DLC also provides a power source for the scan tool as follows:

• | Battery voltage at the DLC terminal 16 (circuit 1440).

• | Ground at terminal 4 (circuit 150) and terminal 5 (circuit 451).

### Class 2 Serial Data Link

The class 2 serial data link allows the following modules to communicate with each other:

• | The body control module (BCM)

• | The electronic brake control module (EBCM)

• | The instrument panel cluster (IPC)

• | The powertrain control module (PCM)

• | The inflatable restraint sensing and diagnostic module (SDM)

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