L200 L4-2.2L VIN F (2002)
Intake Air Temperature (IAT) Sensor: Description and Operation
INTAKE AIR TEMPERATURE (IAT) SENSOR
The IAT sensor is located in the air induction tubing near the air box. The IAT sensor is a two wire thermistor type sensor that varies resistance
according to changes in air induction temperature. The PCM supplies a five volt reference through a resistor to the sensor, which is connected to ground.
When the sensor is cold it has high resistance (high signal voltage at PCM). As the sensor temperature increases, its resistance decreases (lower signal
voltage at PCM). The PCM uses the signal voltage to determine intake air temperature.
