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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1059 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550)) >> Pinpoint Test F: Intake Air Temperature (IAT) Sensor >> Introduction >> Circuit Function

Circuit Function

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The IAT sensor is a thermistor-type sensor with a variable resistance that is inversely proportional to temperature changes. When interfaced with the powertrain control module (PCM), it produces a 0.5 volt analog signal that measures temperature.

The IAT sensor's primary function is to measure the intake air temperature to control timing and fuel rate when cold-starting. Continuous monitoring by the IAT sensor limits smoke emission.

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