Air Temperature Sensor ( Ambient / Intake ): Description and Operation

Intake Air Temperature (IAT) Sensor Operation:

The air temperature (TA) sensor is mounted on the #1 cylinder intake runner. The sensor consists of a thermistor bulb. As air temperature increases, sensor resistance decreases. The ECU receives sensor information as resistance to ground on pin C5. Air temperature information is used along with information from the PA sensor to determine air density and adjust fuel delivery accordingly.