Body Control Module

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 Programmable Communication Interface or PCI bus). This network consists of the body control module (BCM), powertrain control module (PCM), sentry key immobilizer module (SKIM), the transmission control module (TCM), the electro/mechanical instrument cluster (MIC), compass/mini-trip computer (CMTC), occupant restraint controller (ORC), optional antilock brakes (ABS), the optional radio and remote CD-player, optional left and right airbag control modules. The (BCM) is operational when battery power is supplied to the module, ignition switch power is needed for ignition switched functions.
switched functions.

The body control module provides the following features:
A/C switch status/evaporator temperature status
BCM diagnostic support
Central lock and unlock (VTSS only)
Climate Control system support
Door ajar switch status
Door Lock Inhibit (key in ignition or headlamps/park lamps on)
Electronic Odometer Support
Headlamp Time Delay
Illuminated Entry with "fade to off
Interior lighting with battery save feature
Mechanical Instrument Cluster (fuel level, dim data, odometer & warning chime) support
Travel information system
Power convertible top
Power door lock multiplexing control
Rear Window Defogger Control
Remote Keyless Entry with Panic Mode
Remote power deck lid release
Rolling door lock control (customer programmable)
Sentry key immobilizer support
Vehicle Theft Security System
Wiper Control (speed sensitive with return to park)

The BCM receives information over the PCI Bus from the PCM in order to support certain features.

The required information is as follows:
- Engine RPM
- Engine Temperature
- Injector on Time and Distance Pulses
- Vehicle Speed
- Charging System Failure, Engine Temperature Limp-In, VTSS Arming Status
- Engine Model
- "Check Engine" lamp status

The BCM provides the PCM with information on the NC switch status and the VTSS status.

The JR has several customer programmable features which can be disabled or enabled by the customer.