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ElEctrical componEnts
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IAT1 (Intake Air Temperature #1)
• The Intake Air Temperature1 (IAT1) sensor is a two wire thermistor
sensor that is located inside the Mass Air Flow (MAF) sensor.
• The IAT1 sensor’s internal thermistor forms a voltage
divider with a pullup resistor inside the ECM.
• The IAT1 sensor’s primary function is to measure intake air
temperature to aid in controlling EVTG and the glow plug system.
• The MAF/IAT1 sensor is mounted in the
intake air piping after the air filter.
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