Question about 2002 Toyota ECHO

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How can I test the coolant temperature sensor on a 2003 Toyota Echo so that I can make sure whether or not it's working properly? Thanks for your kind reply.

How can I test the coolant temperature sensor on a 2003 Toyota Echo so that I can make sure whether or not it's working properly? Thanks for your kind reply.

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  • jbencosme May 17, 2009

    Thank you for your reply. I understand I leave the sensor in place, unplug the two wires connected to the sensor, and place the multimeter leads on each of the two wires. Am I correct?

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Use a multimeter to check. unplug the sensor and replace it with multimeter. As the coolant warms you should see a voltage change. I don't know the exact figures you should see but it works on voltage change to close and open the circuit, hope it helps.

Posted on May 17, 2009

  • haydnm0 May 17, 2009

    Sorry I worded the it wrong before you attach a multimeter to the sensor and you are checking for resistance ( the ohms sign on the meter) not the voltage my mistake. but you check the sensor not the wires.

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Get the coolant pressure tested, its definitely leaking coolant. You will need to get the coolant running line.


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Click the link below :-----


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2 Answers

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Pressure test will help you to know from where exactly coolant/refrigerant is getting leaked.===========For complete step by step troubleshooting i suggest you to go through the help links mentioned below :----Click the link below :-----

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These details will help.

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