Information Bus: Description and Operation

DATA LINK CONNECTOR (DLC)
The Data Link Connector (DLC) contains the class 2 serial data links:
The DLC also provides a power source for the scan tool as follows:
^ Unswitched voltage (B+) at DLC terminal 16 (circuit 540)
^ Ground at terminal 4 (circuit 650) and terminal 5 (circuit 451)

CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate data with each other:
^ Electronic Brake/traction Control Module (EBTCM)
^ Instrument Panel Cluster (IPC)
^ Powertrain control module (PCM)
^ Inflatable Restraint Sensing Arid Diagnostic Module (SDM).

The Class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes. The Class 2 serial data link is located at the DLC connector terminal 2. Terminal 2 consists of the following circuits:
^ Circuit 1036
^ Circuit 1128
^ Circuit 1049
^ Circuit 1122
^ Circuit 1132