Neon R/T L4-2.0L VIN F HO (2001)
Body Control Module: Description and Operation
System Description and Functional Operation
SYSTEM DESCRIPTION
The body system on the 2001 PL 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 it's function. It will only respond to messages "addressed" to it through a 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 Vehicle Communication of this general
information.