For 1990-2009 cars

### Data Link Connector (DLC)

The DLC is a standardized 16 way connector located below the instrument panel and close to the steering column. Both the connector design and location are dictated by industry wide agreements. All DLC's are required to provide a B+ at all times to Pin 16. This positive supply is used to power the scan tool. All DLC's supply a power ground at Pin 4 and a clean signal ground at Pin 5. The Class 2 serial data circuit is provided at pin 2 of the DLC.

### Class 2 Serial Data Link

The class 2 serial data link in this vehicle is configured in a star which means, there is no redundant path for the serial data to flow through, in the event that the conductor feeding a modules branch develops an open condition that module will not be able to communicate. The following modules use the Data Link network to communicate with each other:

• | The body control module (BCM)

• | Digital radio receiver

• | The electronic brake control module (EBCM)

• | The powertrain control module (PCM)

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

• | The Radio

• | The vehicle theft deterrent (VTD)

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