Information Bus: Description and Operation

DATA LINK CONNECTOR (DLC)
The DLC provides a power source for the scan tool as follows:
^ Unswitched voltage (B+) at DLC terminal 16 (circuit 440)
^ Ground at terminal 4 (circuit 1550) and terminal 5 (circuit 1550)

CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate data with each other:
^ Electronic brake control module/electronic brake traction control module (EBCM/EBTCM)
^ Instrument Cluster (IPC)
^ Powertrain control module (PCM)
^ Pass key III module (PK3)
^ Inflatable Restraint Sensing And Diagnostic Module (SDM).
^ Driver Information Display (DID)
^ Radio

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.