3,472,733 views
More information: https://www.autodaewoospark.com/senso... Testing the engine coolant temperature sensor is very simple, it can be done in a few minutes using a digital or analog multimeter if you have it. Simply measure the resistance based on the variation in coolant temperature, for this you must start the engine and measure the resistance of the temperature sensor as the engine temperature increases, if the sensor is in good condition it will show a lower and lower resistance until reaching about 200 OHMS when the operating temperature is reached.