1G Coolant temperature sensor

[Willosch]

Hello, I'm currently working on fixing my Eclipse and I hope I'm on the last bit.
I just need quick help, because I'm a bit unsure and don't want to break things.
So I've got engine code 21
Coolant temperature sensor fault.
And I was wondering which is the coolant temperature sensor?

I'm assuming the one down with the big plug is it.
Do I just pull the plug off and then unscrew the sensor?

Also what OEM number has this part?
Or/And what should I get as replacement part?

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[steve]

Yes, that sensor but usually it's the wiring that's failed.

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[Willosch]

Yes, that sensor but usually it's the wiring that's failed.

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How could check that?
And if they are the problem how can I repair them? Or should I replace them somehow?

 

[steve]

Typically with a multimeter and measure the resistance of the sensor at various temps according to the Service Manuals (posted on the site).

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You check the wires the same way, measure the resistance from one end (sensor) to the other (ECU) and make sure you have close to 0 ohms between the two points.

 

[92AWDHX40]

ITs a cheap enough part to just replace any way who knows if the resistor inside has failed, but wiring also is brittle.