F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Intake Air Temperature Sensor: Description and Operation
Intake Air Temperature (IAT) Sensor
The IAT sensor is a thermistor device. 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 providing a signal corresponding to temperature. The IAT is
integrated with the mass air flow (MAF) sensor, known as the MAF/IAT sensor.
Intake Air Temperature 2 (IAT2) Sensor
Intake Air Temperature 2 (IAT2) Sensor
The IAT2 sensor is a thermistor device. 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 providing a signal corresponding to temperature.
The IAT2 sensor is located in the intake manifold. The sensor provides a manifold air temperature signal to the PCM. The PCM uses the IAT2 signal
to control timing and fuel rate during cold starts and provide an input to the cold idle kicker.
