Dakota Quad Cab 4WD V6-3.9L VIN X (2001)
Central Timer Module ( CTM ) High Option: Description and Operation
System Description and Functional Operation
SYSTEM DESCRIPTION
The body system on the 2001 AN and AN84 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 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.
