RAM 2500 Truck 2WD V8-5.7L VIN D (2004)
Body Control Module: Description and Operation
System Description
IDENTIFICATION OF SYSTEM
The vehicle systems that are part of the "body" system are:
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Airbag
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Audio (with amplifier on premium systems)
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Chime
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Communication
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Door Ajar System
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Electrically heated system
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Exterior lighting
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Heating and A/C
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Horn
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Instrument Cluster
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Interior Lighting
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Memory Seat
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Overhead Console
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Power Door Lock/RKE
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Power windows
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Telecommunications (hands free phone)
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Vehicle theft security system (VTSS)
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Windshield Wiper and Washer
SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION
The body system on the 2004 DR consists of a combination of modules that communicate over the PCI bus (Programmable Communication Interface
multiplex system). Through the PCI bus, information about the operation of vehicle components and circuits is relayed quickly to the appropriate
module(s). All modules receive all the information transmitted on the bus even though a module may not require all information to perform its function.
It will only respond to messages "addressed" to it through binary coding process. This method of data transmission significantly reduces the complexity
of the wiring in the vehicle and the size of wiring harnesses. All of the information about the functioning of all the systems is organized, controlled, and
communicated by the PCI bus, which is described in the communication section of this general information.
