Body Control Computer: Overview — Dodge Caravan III (1995-2000)

Body Control Computer: Overview Dodge Caravan III

IDENTIFICATION

Application	Body
Caravan, Town & Country, & Voyager	NS

BODY IDENTIFICATION

DESCRIPTION

The body control computer system consists of a combination of modules that communicate over the Chrysler Collision Detection (CCD) bus system. Through the CCD bus, information related to the operation of vehicle components and circuits are relayed to the appropriate system module(s). This reduces the complexity of vehicle wiring and size of wiring harness.

Body control computer systems covered in BODY CONTROL COMPUTER are as follows

Chime system
Compass/Mini-Trip Computer (CMTC)
Door ajar system
Exterior lighting
Instrument cluster
Interior lighting
Intermittent wipers
Power door locks
Power windows
Remote keyless entry
Vehicle Information System
Vehicle Theft Security System (VTSS).

Body control computer fault messages are accessed through 16-pin Data Link Connector (DLC) using Chrysler's Diagnostic Readout Box (DRB) scan tool or generic scan tool. DLC is located on left side of steering column, above brake pedal.

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRB) scan tool. A generic scan tool may not be capable of performing all necessary test functions.

The Body Control Module (BCM) is part of junction block located under left side of instrument panel. BCM stores odometer information for electronic instrument cluster display and provides power and ground for a variety of systems.

BCM is the only module that has the capability of providing both "bias" and "termination" on the CCD bus system. See CCD BUS SYSTEM . Systems are monitored by BCM through voltage drops.

Vehicle may be equipped with either a premium or base model BCM. Base body control computer is used on vehicles with a mechanical instrument cluster.

CONNECTOR IDENTIFICATION

Note. For terminal identification of body control system connectors use illustrations. (Scheme 1)-15. Connector terminal numbers are molded into connectors. If connector terminal identification differs from that shown in figure, use wire colors to ensure correct circuit is being tested.

Connector	See
Body Control Module	Fig. (Scheme 1)
Compass Mini-Trip Computer	Fig. (Scheme 13)
Data Link (DLC)	Fig. (Scheme 2)
Headlight	Fig. (Scheme 4)
HVAC Control Module (Blue)	Fig. (Scheme 5)
Ignition Switch	Fig. (Scheme 6)
Information Center	Fig. (Scheme 4)
Instrument Cluster	Fig. (Scheme 7)
Junction Block	Fig. (Scheme 8)
Junction Block Internal	Fig. (Scheme 9)
Multifunction Switch Connector Terminals	Fig. (Scheme 10)
Powertrain Control Module Connectors	Fig. (Scheme 11)
Relay Connector	Fig. (Scheme 12)
Remote Keyless Entry (RKE) Module	Fig. (Scheme 13)
Transmission Control Module Connector	Fig. (Scheme 14)
Wiper Motor	Fig. (Scheme 15)