Section 4 (Body Control Modules): Description
WARNING: This page is about a different car, the 2000 Dodge Ram Wagon and 2000 Dodge Ram Van. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Vehicles are equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEMS
article.
NOTE:
This article applies to vehicles equipped with a Body Control Module (BCM). BCM is referred to as the Central Timer Module (CTM). The CTM is used only on vehicles equipped with Vehicle Theft Security System (VTSS).
The body control system consists of a combination of modules that communicate over the Chrysler Collision Detection (CCD) bus circuit. Through the CCD bus circuit, information related to the operation of vehicle components and circuits is relayed to the appropriate system module(s). This reduces the complexity of vehicle wiring and size of wiring harness.
Vehicle systems that are part of the body control system are as follows.
- Air Bag
- Chime
- Communication
- Door Ajar
- Instrument Cluster
- Interior Lighting
- Power Door Locks/Remote Keyless Entry
- Vehicle Theft Security
- Windshield Wiper/Washer
Components that communicate over the CCD bus circuit are as follows.
- Air Bag Control Module (ACM)
- Anti-Lock Brake System (ABS) Controller Anti-Lock Brake (CAB) Module
- Central Timer Module (CTM)
- Data Link Connector (DLC)
- Mechanical Instrument Cluster (MIC) Module
- Powertrain Control Module (PCM)