Firebird V6-191 3.1L (1990)
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Manifold Air Temperature (MAT) Sensor: Description and Operation
Intake Air Temperature Sensor
The Manifold Air Temperature sensor (MAT) is a thermistor mounted in the intake manifold. Low intake air temperature produces a high resistance,
while high intake air temperature produces a low resistance. The ECM supplies a 5.0 volt signal to the sensor through a resistor and measures the
voltage. By measuring the voltage, the ECM can determine MAT.