Pathfinder 2WD V6-4.0L (VQ40DE) (2009)
Air Door Actuator / Motor: Description and Operation
Mode Door Motor
Automatic Air Conditioner
MODE DOOR MOTOR
System Description
SYSTEM DESCRIPTION
Component Parts
Mode 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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Mode door motor (front)
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PBR (built into mode 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 mode door position (vent, B/L, foot, D/F, and defrost) is set by the A/C auto amp. by means of the mode door motor (front). When a mode door
position is selected on the A/C auto amp., voltage is applied to one circuit of the mode door motor (front) while ground is applied to the other circuit,
causing the mode door motor (front) to rotate. The direction of rotation is determined by which circuit has voltage applied to it, and which one has
ground applied to it. The A/C auto amp. monitors the mode door position by measuring the voltage signal on the PBR circuit.
In AUTO mode the mode door position is set by the A/C auto amp. which determines the proper position based on inputs from the in-vehicle sensor,
ambient sensor, optical sensor, intake sensor, and the temperature selected by the driver or passenger.
Mode Door Control Specification
COMPONENT DESCRIPTION