Body Control Module (BCM)
The Body Control Module (BCM) supplies vehicle occupants with visual and audible information and controls various vehicle functions. To provide and receive information, the module is interfaced to the vehicle's serial bus communications network (the Chrysler Collision Detection bus, or CCD bus). This network consists of the Powertrain Control Module (PCM), the Transmission Control Module (TCM), the Electro/Mechanical Instrument Cluster (MIC), Compass Mini-Trip Computer (CMTC), the radio (RBN) and the Airbag Control Module (ACM). The BCM is operational when battery power is supplied to the module. Ignition switch power is needed for ignition switch functions.
The Body Control Module provides these features.
- Inside Mirror/Reading Lamps.
- Ignition Key Halo Lamp.
- Illuminated Entry.
- Battery Protection (Load Shedding).
- Intermittent Wipe, Speed Sensitive Wipe And Wipe After Wash.
- Gauge Positioning And CCD Lamp Drive Instrument Cluster Dimming.
- Vehicle Theft Security System (VTSS).
- Power Door Locks.
- Auto Door Locks.
- Remote Keyless Entry (RKE).
- Door Lock Inhibit.
- Controls Park Lamps, Low And High Beam.
- Headlamps.
- Headlamp Time Delay.
- Remote Radio Controls.
- Auto Volume Radio Control.
- Chime.
- Climate Control Support.
- Low Tire Pressure Warning Interface For Operation Of LTPW Lamp.
The BCM receives information over the CCD bus from the PCM in order to support certain features. The following is required information.
Supported BCM Systems
- Engine RPM.
- Injector on Time and Distance Pulses.
- Vehicle Speed
- Engine and Battery Temperature.
- Charging System Failure, Engine Temperature Limp-In, VTSS Arming Status.
- Engine Model.
- "Service Engine Soon" Lamp Status.