Engine Coolant Temperature Sensor Tests

Engine coolant temperature sensor circuit explained. The engine coolant temperature sensor is a variable resistor known as a thermistor. The PCM runs multiple tests on the sensor circuit to check for shorts and opens. I refer to a wiring diagram to create both faults while monitoring the sensor signal with a voltmeter and a scantool.

Disclaimer:
The content of this video is available for informational and educational purposes only.
I cannot guarantee against improper use or unauthorized modifications of this information. MR. DIAGNOSTECH assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not MR. DIAGNOSTECH.