Inlet Air Temperature (IAT) Sensor: Description

The IAT sensor is used to detect the temperature of intake air to support the correction of fuel flow and ignition timing, and the compensation of air temperature for idle control.

For the measure feature of the IAT sensor at malfunction, if the coolant temperature is normal, the intake air substitution value is 0°C when the coolant temperature is below 69.75°C while the value is 60°C when the coolant temperature is over 69.75°F.

The substitution value should be 60°C when the engine coolant temperature sensor is failed simultaneously.