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Time to bypass the temp compensation board... but... 200 1992

posted by  Mimmoccc on  Tue Sep 12 02:06 CST 2023
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I have done today the first test: multimeter on sensor wire.

Engine off (the car was unused from yesterday): reads 9.88v
Engine on for around 3 minutes: reads from 10v up to 10.37v as a final value
Engine off after the test: shows 10.03v

Should I consider the test passed or failed? Can it be just the multimeter drift/accuracy?

Then I measured the resistance of the sensor and it was 378 ohms (real engine temp was around 40C°/105F degrees)

I guess I have to explore further, but in any case, at the next intake manifold cleaning, I will replace the sensor that is the original one (but 31yrs and 650k Km deserve a replacement...)

BTW: I found a temp gauge replacement (Volvo Genuine) currently sold at Skandix at 90.00€ ... a little bit expensive...
https://www.skandix.de/en/spare-parts/electrics/instruments/gauge-coolant-temperature/1038312/





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New Time to bypass the temp compensation board... but... [200][1992]
posted by  Mimmoccc  on Wed Sep 6 13:03 CST 2023 >


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