Information Bus: Description and Operation

INFORMATION BUS / DATA LINK CONNECTOR
The Data Link Connector (DLC) contains these serial data links:
^ Class 2.
^ UART.
^ Entertainment and Comfort (E&C).

The DLC also provides a power source for the scan tool:
^ Unswitched voltage (B+) at DLC terminal 16 (circuit 640).
^ Ground at terminals 4 (circuit 1450) and 5 (circuit 1550).

CLASS 2 SERIAL DATA LINK
The Class 2 serial data link allows these modules to communicate data with each other:
^ Body Control Module (BCM).
^ Electronic Brake Traction Control Module (EBTCM).
^ Heater-AC control (it equipped with RPO CJ2).
^ Instrument cluster.
^ Powertrain Control Module (PCM).

In addition, the Class 2 serial data link allows a scan tool to communicate with these modules for diagnostic and testing purposes. The Class 2 serial data link is located at the DLC connector terminal 2, which consists of circuits 1036,1037,1038, 1049, 1122, and 1132.

UART SERIAL DATA LINK
The UART serial data link allows a scan tool to communicate with the Supplemental Inflatable Restraint (SIR) Sensing and Diagnostic Module (SDM) for diagnostic and testing purposes. The UART serial data link is located at the DLC connector terminal 9, circuit 800.

ENTERTAINMENT AND COMFORT (E&C) SERIAL DATA LINK
The Entertainment and Comfort (E&C) serial data link allows a scan tool to communicate with the radio and CD player (if equipped with RPO U1S) for diagnostic and testing purposes. In addition, the E&C serial data link allows the radio and the CD player (if equipped with RPO U1S) to communicate data with each other. The E&C serial data link is located at the DLC connector terminal 14, circuit 835.