Intake Air Temperature (IAT) Sensor
The IAT sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a thermistor decreases as the temperature increases, and resistance increases as the temperature decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical voltage signals to the PCM corresponding to temperature.
The IAT sensor is integrated with the mass airflow (MAF) sensor, known as the mass airflow/intake air temperature (MAF/IAT) sensor.
The MAF/IAT sensor is located in the intake air tube between the air filter housing and the turbocharger intake.