F 150 2WD V8-4.6L VIN W (2007)
The IAT sensor provides a quicker temperature change response time than the ECT or CHT sensor.
Currently there are 2 design types of IAT sensors used, a stand-alone/non-integrated type and a integrated type. Both types function the same, however
the integrated type is incorporated into the mass air flow (MAF) sensor instead of being a stand alone sensor.
Supercharged vehicles use 2 IAT sensors. Both sensors are thermistor type devices and operate as described. One is located before the supercharger at
the air cleaner for standard OBD/cold weather input, while a second sensor (IAT2) is located after the supercharger in the intake manifold. The IAT2
sensor located after the supercharger provides air temperature information to the PCM to control spark and to help determine charge air cooler (CAC)
efficiency.
