Montero 4WD V6-3.5L SOHC (1998)
Intake Air Temperature Sensor: Testing and Inspection
OPERATION
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The intake air temperature sensor functions to convert the temperature of the air drawn into the engine to a voltage, and to input that voltage as a
signal to the engine control module. The engine control module, based upon those signals, then corrects the amount to fuel injection, etc.
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The 5 V power supply within the engine control module is supplied, by way of the resistance within the unit, to the intake air temperature sensor, it
passes through the intake air temperature sensor, which is a type of resistor, and is grounded as the engine control module.
Note that the resistance of the intake air temperature sensor decreases when the temperature of the intake air increases.