Pathfinder LE 2WD V6-3.3L (VG33E) (1999)
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Air Door: Description and Operation
From VIN # 350001
Air Mix Door
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
1. Auto amp.
2. Air mix door motor (LCU)
3. In-vehicle sensor
4. Ambient sensor
5. Sunload sensor
6. Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier sends air mix door and mode door opening angle data to the air mix door
motor LCU and mode door motor LCU.
The air mix door motor and mode 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 operation is selected. The new selection data is returned to the auto amplifier.
