Excursion 4WD V8-6.0L DSL Turbo VIN P (2004)
Intake Air Temperature Sensor: Description and Operation
INTAKE AIR TEMPERATURE (IAT) SENSOR
The intake air temperature (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 6.0L diesel utilizes two IAT sensors. The IAT sensor is integrated into the mass air flow (MAF) sensor. The PCM uses the AT signal to control
timing and fuel rate during cold starts and provide an input to the cold idle kicker.
INTAKE AIR TEMPERATURE 2 (IAT2) SENSOR
Intake Air Temperature 2 (IAT2) Sensor
The IAT2 or manifold air temperature (MAT) 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.
