How To Test Temperature Sensor

Resistance in ohms cold resistance perimeters.

How to test temperature sensor. It is the sensor that tells the computer when the engine has warmed up sufficiently for the computer to pay attention to the many other sensors on the engine and exhaust. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. Now that you ve located the ect sensor on your vehicle you re ready to troubleshoot it. Check the warm sensor in your engine.

However you should test your sensor first to make sure that s where. Attach the black lead of the volt ohm meter to the body of the cold sensor this is before turning the engine on. Reconnect the sensor s power source. You should see a much lower reading on the.

You should have a reading of approximately 2000 ohms. The reading should be 2000 ohm approx. Then check the sensor in the warm sensor after the engine is run. Your vehicle s temperature sensor is an important component of your engine s cooling system so if you re having problems with your car or truck overheating you may have a faulty sensor.

If you have a new sensor on hand and want to check it you can do this easy test. Take the engine temperature on a location near the coolant temperature sensor. Coolant temperature sensor test. If you are checking a brand new sensor you need to follow this.

Unplug the sensor electrical connector. Disconnect the power wires at the sensor point c in the diagram or connection point closest to the sensor point b if the cable to your sensor cannot be disconnected at the sensor. Having established the continuity of the circuit let s check the source voltage but not at the source. The temperature sending unit more properly known as a temperature sensor is one of the most important sensors in your car.

Get the engine surface temperature using an infrared thermometer or suitable cooking thermometer. Luckily replacing a temperature sensor is as simple as plugging in a new one.