Corsica V6-3100 31L MFI VIN M (1994) > Intake Air Temperature Sensor Diagram
Intake Air Temperature Sensor: Description and Operation
Intake Air Temperature Sensor
PURPOSE
Air at low temperatures requires a richer air/fuel mixture than air at high temperatures. The Intake Air Temperature (IAT) sensor measures the
temperature of the intake air in the air cleaner. The control unit uses this information, compared with information from other sensors, to help
determine to the amount of fuel required.
Intake Air Temperature (IAT) Sensor Circuit Diagram
OPERATION
The Intake Air Temperature sensor (IAT) is a thermistor mounted in the air cleaner assembly. Low intake air temperature produces a high
resistance, while high intake air temperature produces a low resistance. The PCM supplies a 5.0 volt signal to the sensor through a resistor, and
monitors the voltage in the circuit. The measured voltage varies with the temperature of the intake air, due to the changing resistance of the sensor.
By measuring the voltage, the PCM can determine the temperature of the incoming air.
