Altima V6-3.5L (VQ35) (2003)
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Air Door Actuator / Motor: Description and Operation
Automatic Air Conditioner
Mode Door Motor Circuit
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
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Auto amp.
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Mode door motor (LCU)
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In-vehicle sensor
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Ambient sensor
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Sunload sensor
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Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier sends air mix door, mode door and intake door opening angle data to the air mix
door motor LCU, mode door motor LCU and intake door motor LCU.
The air mix door motor, mode door motor and intake door motor read their respective signals according to the address signal. Opening angle indication
signals received from the auto amplifier and each of the motor position sensors are compared by the LCUs in each motor with the existing decision and
opening angles. Subsequently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new selection data is
returned to the auto amplifier.
Mode Door Control Specification
COMPONENT DESCRIPTION