Tracker 4WD L4-1.6L VIN 6 (1998)
Intake Air Temperature Sensor: Description and Operation
Intake Air Temperature (IAT) Sensor
The IAT sensor (1) is located in the air cleaner. 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.
