System Description

IDENTIFICATION OF SYSTEM
The vehicle systems that are part of the "body" system are:
- Electrically Heated System
- Audio
- Airbag System (ORC) and (OCM)
- Chime
- Overhead Console (EVIC)
- Exterior Lighting
- Mechanical Instrument Cluster (MIC)
- Interior Lighting
- Door Ajar
- Vehicle Communication
- Power Door Locks/RKE
- Vehicle Theft Security System
- Wiper System
- Hands Free Phone
- Tire Pressure Monitoring (TPM)


SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION
The body system on the 2004 KJ 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.