Majestic L6-4.0L (1990)
EGR Temperature Sensor: Description and Operation
The EGR sensor is a negative temperature coefficient (NTC) thermistor. NTC means that the resistance of the thermistor decreases as the sensed
temperature increases. The ECM applies 5 volts to pin 1 of the sensor and monitors the voltage across the sensor pin to ground. The theoretical full
voltage range is from 5 to O volts representing maximum cold to maximum hot. Typically with the engine running at 2000 rpm the sensor voltage will
drop 0.1 volt when the EGR valve is opened.
EGR Temperature Sensor
Temperature Versus Resistance
