Altima V6-3.5L (VQ35) (2003)
Mode Door Motor
The mode door motor is attached to the heater and cooling unit. It rotates so that air is discharged from the outlet set by the auto amplifier. Motor
rotation is conveyed to a link which activates the mode door.
Air Mix Door Motor Circuit
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
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Auto amp.
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Air mix 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 motor 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.