Intake Air Temperature (IAT) Sensor

IAT sensor is located in the air cleaner housing. IAT sensor consists of a temperature dependent resistive metal strip. IAT sensor resistance changes as intake air temperature changes. ECM uses IAT sensor signal to retard ignition timing when intake air temperature is greater than 131°F (55°C).

Default strategy for IAT sensor is to select a substitute value based on nominal operating conditions, approximately 122°F (50°C). An IAT sensor fault may result in slight loss of power in high ambient air temperatures. A fault is indicated by illumination of the MIL.