Engine - Coolant Temperature Sensor/Switch: Testing and Inspection

Water Thermosensor:

Testing Water Thermosensor:

1. Remove the water thermosensor from the engine and place it in water with a thermometer.
2. Connect an ohmmeter to the sensor terminals.
3. Gradually heat the water and check the resistance of the sensor.

COOLANT TEMPERATURE RESISTANCE (KOHMS)

-20°C (-4°F) 14.5-17.8
20°C (68°F) 2.2-2.7
40°C (104°F) 1.0-1.3
60°C (140°F) 0.5-0.64
80°C (176°F) 0.28-0.35