Engine Controls - Tests W/Codes - 3.0L Body: Description

NOTE: Shadow and Sundance models are not equipped with a body controller. For self-diagnostic testing of Electronic Automatic Transaxle (EATX) and DRB-II problems and/or error messages, proceed to TESTS 1A in VEHICLE COMMUNICATIONS TESTS.

Diagnostic test procedures are designed to detect system faults as quickly as possible. Body and chassis fault codes are accessed through CCD bus diagnostic connector. CCD bus diagnostic connector is located in front of left shock tower. DRB-II tester is used to access information from CCD bus.

Fig 1: CCD Bus (Data Link) Diagnostic Connector Terminal ID

Courtesy of CHRYSLER CORP.

The CCD bus is a pair of twisted wires traveling from module-to-module receiving and delivering coded information. The code identifies the message and its importance. When multiple messages attempt to access CCD bus at once, code assigns priority ranking.

The 2 twisted wires used by the CCD bus system are called Bus "+" and Bus "-". Both wires carry approximately 2.5 volts.