Neon L4-2.0L VIN F HO (2003)
Body Control Module: Description and Operation
System Description
Identification Of System
The vehicle systems that are part of the "body" system are:
-
Airbag System
-
Audio
-
Compass/Temperature Mirror
-
Instrument Cluster
-
Interior Lighting
-
Power Door Locks/Remote Keyless Entry
-
Vehicle Communications
-
Vehicle Theft Security System
System Description
The body system on the 2003 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
See: Functional Operation/Vehicle Communication of this general information.