Crown Victoria V8-4.6L VIN W (2000)
The IAT provides air temperature information to the PCM. The PCM uses the air temperature information as a correction factor in the calculation of
fuel, spark and MAF.
The IAT sensor provides a quicker temperature change response time than the ECT sensor.
Supercharged 5.4L Lightning vehicles use (2) IAT sensors. Both sensors operate as described above. However, one is located before the supercharger
at the air cleaner for standard OBD II/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 border-line spark and to help determine
intercooler efficiency.
