Dakota Quad Cab 2WD V6-3.9L VIN X (2002)
VEHICLE COMMUNICATION
The Programmable Communication Interface or PCI Bus is a single wire multiplexed network capable of supporting binary encoded messages shared
between multiple modules. The PCI bus circuit is identified as D25 and is violet with a yellow tracer. Additional tracer colors may be added to the
yellow in order to distinguish between different module connections. The modules are wired in parallel. Connections are made in the harness using a
splice.
The splice called the Diagnostic Junction Port, serves as the "Hub" of the bus. The Diagnostic Junction Port provides an access point to isolate most of
the modules on the bus in order to assist in diagnosing the circuit. The following modules are used on the AN and AN84:
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Airbag Control Module
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Amplifier
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A/C Heater Control
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Central Timer Module
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Controller Antilock Brake
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Compass Mini-Trip Computer
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Electro/Mechanical Instrument Cluster
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Powertrain Control Module
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Radio
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Sentry Key Immobilizer Module
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Transfer Case Control Module
