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-   -   Coolant temperature sending unit (http://www.peachparts.com/shopforum/showthread.php?t=271643)

estmersbenz 02-16-2010 01:22 PM
Coolant temperature sending unit
 
How to test coolant temperature sending unit with multimeter? My temperature gauge needle isn't working.

w123 230E 100kW 1984

ah-kay 02-16-2010 02:01 PM
This is my experience - I am not sure about a W123 but I had similar problem with my 190D. The temperature gauge did NOT move. I grounded the cable at the sensor to ground and the gauge read 'RED', i.e. max value. This indicates to me the cable from sensor to gauge is OK and the gauge is not stuck. I replace the sensor and everything works now. I don't think the sensor is repairable and it not that expensive. It is just a resister registering different values at various temperature.

estmersbenz 02-16-2010 02:55 PM
thank you buddy, I'll try it :)


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