Component Tests and General Diagnostics

The Data Link Connector (DLC) contains these serial data links:
^ Class II
^ 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 440).
^ Ground at terminals 4 and 5 (circuit 1550).

Class II Serial Data Link
The Class II serial data link allows a scan tool to communicate with the Powertrain Control Module (PCM) for diagnostic and testing purposes. The Class II serial data link is located at the DLC connector terminal 2, circuit 1807.

UART Serial Data Link
The UART serial data link allows a scan tool to communicate with these systems for diagnostic and testing purposes:
^ Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM).
^ Powertrain Control Module (PCM).
^ Supplemental Inflatable Restraint (SIR) Sensing and Diagnostic Module (SDM).
^ Driver Information Display (DID) (if equipped).

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) for diagnostic and testing purposes. In addition, the E&C serial data link allows the radio and the CD player (if equipped) to communicate data with each other. The E&C serial data link is located at the DLC connector terminal 14, circuit 835.