Air Temperature Sensor ( Ambient / Intake ): Description and Operation
INTAKE AIR TEMPERATURE SENSOR - PCM INPUTFig.8 Intake Air Temperature Sensor And MAP Sensor:
The IAT sensor threads into the intake manifold.
The Intake Air Temperature (IAT) sensor measures the temperature of the intake air as it enters the engine. The sensor supplies one of the inputs the PCM uses to determine injector pulse width and spark advance.