Test Temperature Sensor With Multimeter

Digital multimeters dmms with built in signal conditioning hardware measure various types of temperature sensors such as thermocouple resistance temperature detector rtd and thermistor.

Test temperature sensor with multimeter.

Any car in this video we will demonstrate how to test coolant temperature sensor on any car. Every make and model uses a specific temperature sensor which will give you specific readings whenever you test them with a multimeter. You can take advantage of the way the iat sensor works to test sensor operation using an ohmmeter. Disconnect the connector from the coolant temperature sensor temperature sending unit.

You can do it at home using a digital multimeter and a cooking thermometer. How to test a vw golf jetta bora mk4 coolant temperature sensor simple easy video tutorial. The iat sensor is a thermistor that changes electrical resistance with changes in temperature. Connect the black lead of the meter to the body of the cold sensor and the red to the.

Turn on the engine and allow it to run for 5 minutes or until the temperature starts to go up. If the number on the multimeter is lower than the reading you got in step 2 the sensor is working correctly. How to test coolant temperature sensor. A bad engine coolant temperature sensor affects engine performance.

Measure the resistance across the terminal pins using a digital multimeter and write this value down. If not it needs to be replaced. We ll start with a multimeter continuity test. Test the sensor again with the multimeter.

Plug the black probe into the com common port on your multimeter. We want to make sure that all the wires are connected correctly. If you have a new sensor on hand and want to check it you can do this easy test. Testing the iat sensor.

Disconnect the wires for the sensor at its power source point a in the diagram. Plug the red probe into the vω port. Step 4 check with cold sensor. You can easily disconnect your temperature sensor from the control system and validate the temperature sensor directly with your dmm.

Resistance in ohms cold resistance perimeters. If you do not see anything that is more than 200 ohms in difference the coolant temperature sensor is defective and will need to be replaced. Look online for the hot and cold readings of your vehicle s temperature sensor and compare your readings to see if they closely match.