B Series Truck 4WD L4-2606cc 2.6L SOHC (1992)
Engine - Coolant Temperature Sensor/Switch: Description and Operation
^ The Water Thermosensor is a thermistor device whose resistance varies with changes in engine coolant temperature.
^ The ECU sends a reference voltage to the sensor and measures changes in resistance as the engine temperature fluctuates.
^ The ECU utilizes this engine temperature information in its calculations for outputs such as air/fuel ratio control and emission devices.
Sensor temperature/resistance relationship:
TEMP.
RESISTANCE (K Ohms)
-20°C (-4°F)
14.5 - 17.8
20°C (68°F)
2.2 - 2.7
80°C (176°F)
0.29 - 0.35