Vibe FWD L4-1.8L VIN L (2005)
Intake Air Temperature Sensor: Description and Operation
INTAKE AIR TEMPERATURE (IAT) SENSOR
The intake air temperature (IAT) sensor is an integral part of the mass air flow (MAF) sensor that is mounted in the air cleaner assembly. The IAT sensor
measures the temperature of the air entering the intake manifold. The IAT sensor provides temperature information to the circuitry of the MAF sensor
and the PCM.
IAT Sensor Operation
The IAT sensor is a thermistor-a resistor whose resistance changes as a function of temperature. When the temperature is low, the resistance is high. The
resistance decreases as the temperature increases. The IAT sensor is a 2-wire circuit with a reference or signal voltage and a ground coming from the
PCM.
