Other information:
DTC Chart: HVAC Module
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
HVAC Module DTC Chart
DTC
Description
Action
B1C83:12
Rear Defog Relay: Circuit Short to Battery
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System Operation
Overview
Multiplexing
is a method of sending 2 or more signals simultaneously over a single
circuit. Multiplexing allows 2 or more electronic modules (nodes) to
communicate over a twisted wire pair [data (+) and data (-)] network.
The information or messages that can be communicated on these wires
consists of commands, status or data. Multiplexing reduces the weight of
t..