Pilot 4WD V6-3.5L (2008)
Information Bus: Description and Operation
Circuit Description
Multiplex Control System
How the Circuit Works
The conventional portion of the electrical system carries DC power through separate wires to each component. The multiplex portion of the system,
however, sends digital signals between control units through shared wires to reduce the number and weight of wire harnesses. The signals from each
switch are converted to digital signals within the receiving multiplex control unit. The digital signals are sent from one multiplex control unit to another
as serial data over dedicated communication lines. When the appropriate control unit receives the digital signal, it converts it back to a switch signal and
operates the related components.
The multiplex control system schematic shows its power, grounds, and communication lines. The ignition key light is also shown because it is used to
blink DTCs in the system's self-diagnosis function. The rest of the multiplex control system wiring is shown in the following circuit schematics:
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Dash and Console Lights (brightness control)
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Entry Light Control System
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Headlights (Auto off lights, function) . Horns
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Interlock System
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Keyless Entry/Security System
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Lights-on Reminder
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Low Oil Pressure Indicator
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Key-in Reminder
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Key Light Timer
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Power Door Locks
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Power Windows
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Seat Belt Reminder
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Wiper/Washers
