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19xx. p80 ECT measurement temperature vs resistance

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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abscate
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Volvo Repair Database 19xx. p80 ECT measurement temperature vs resistance

Post by abscate »

Courtesy of Mike (precopster)

As these 3 items closely determine coolant temperature they should be OEM. The temp switch may be out of range and can be tested in a pot of water. Here's a table of correct values for the temp switch

0 degrees - 5740 Ohms
10 degrees - 3700 Ohms
20 degrees - 2450 Ohms
40 degrees - 1150 Ohms
80 degrees - 318 Ohms
100 degrees- 184 Ohms
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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