Data Link Connector: Description and Operation

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 agreement to follow SAE J 1962 standards.

All DLCs are required to provide a power supply, hot at all times, to Pin 16. This circuit is used to power the scan tool. All DLCs provide a power ground at Pin 4 and a clean signal ground at Pin 5.

The class 2 serial data communications circuit is provided at Pin 2 of the DLC.

The E and C serial data communications circuit is provided at Pin 14 of the DLC.