Pathfinder 2WD V6-4.0L (VQ40DE) (2009)
Air Door Actuator / Motor: Description and Operation
Intake Door Motor
Automatic Air Conditioner
INTAKE DOOR MOTOR
System Description
SYSTEM DESCRIPTION
SYMPTOM:
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Intake door motor does not operate normally.
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Intake door does not change.
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
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A/C auto amp.
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A/C and AV switch assembly
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Intake door motor (PRB built into the intake door motor)
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In-vehicle sensor
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Ambient sensor
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Optical sensor
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Intake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and recirculating the cabin air. If the
recirculation switch is depressed again, the intake door motor rotates in the opposite direction, again allowing fresh air into the cabin.
In the AUTO mode, the A/C auto amp. determines the intake door position based on the ambient temperature, the intake air temperature and the
in-vehicle temperature. When the DEF, D/F, FLOOR or OFF switches are pushed, the A/C auto amp. sets the intake door at the fresh position.