Data Link Connector: Description and Operation

DATA LINK CONNECTOR (DLC)

The data link connector (DLC) is a standardized 16 cavity connector. Connector design and location is dictated by an industry wide standard, and is required to provide the following:
- Scan tool power battery positive voltage at terminal 16.
- Scan tool power ground at terminal 4.
- Common signal ground at terminal 5.
- Class 2 signal at terminal 2.

Class 2 Serial Data Line
The class 2 serial data communications circuit on this vehicle is in a star configuration. This configuration has 3 splice packs, located as follows:
- The splice pack - SP205 located near the data link connector
- The splice pack - SP206 located under the steering column
- The splice pack - SP207 located under the LH cowl panel

There is also a direct redundant class 2 serial data circuit between BCM and PCM.

The following modules communicate on the class 2 serial data circuit:
- splice pack - SP205 attaches to:
- Air Suspension Module (ESC)
- BCM
- DDM
- EBCM
- FPDM
- HVAC Control Module
- PC
- PCM
- Radio
- TCSCM
- splice pack - SP206 attaches to:
- Audio Amplifier
- RSA Control
- VCIM
- splice pack - SP207 attaches to MSM-Driver and SDM.