Tracker 4WD L4-2.0L VIN C (1999)
Intake Air Temperature (IAT) Sensor: Description and Operation
Intake Air Temperature (IAT) Sensor
Intake Air Temperature (IAT) Sensor
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.
