Comanche 4WD L6-242 4.0L VIN S MFI (1992)
Charge Temperature Sensor: Description and Operation
IAT And TPS Sensors
LOCATION
The Manifold Air Temperature (MAT) sensor is threaded into the intake manifold.
PURPOSE
The sensor element extends into the incoming airstream to measure the temperature of the air passing through the intake manifold.
OPERATION
The engine controller sends out a reference voltage of approximately five (5) volts to the sensor. As air temperature changes, the internal
resistance of the sensor will change, causing a varying voltage drop across the sensor. The engine controller reads the voltage drop across the
sensor as charge air temperature.
The engine controller uses this information to calculate the proper injector pulse width and spark advance.
