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Home >> GMC >> 2000 >> Jimmy 2D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Diesel Engines) >> Input Devices >> Transmission Fluid Temperature Sensor
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Transmission Fluid Temperature Sensor

The Transmission Fluid Temperature (TFT) sensor is a thermistor (temperature sensitive resistor). PCM supplies and monitors a 5-volt reference signal through an internal resistor to sensor. Monitored voltage is high when temperature is low (high sensor resistance), and low when temperature is hot.