Tracker 4WD V6-2.5L VIN 4 (2001)
Intake Air Temperature (IAT) Sensor: Description and Operation
INTAKE AIR TEMPERATURE (IAT) SENSOR
The Intake Air Temperature (IAT) sensor (1) is located in the air cleaner assembly (2). The IAT sensor is a thermistor (a variable resistor that changes
value when the temperature changes). The IAT sensor is connected in series with a fixed resistor in the Powertrain Control Module (PCM). The PCM
applies 5 volts to the IAT sensor. The PCM monitors the voltage drop across the IAT sensor and converts the voltage reading into a temperature value.
The IAT sensor voltage reading at the PCM will vary with the changes in the intake air temperature.
