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Old 02-04-2002, 03:30 PM
Roger Cederholm
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1992 300e coolant temp sensor

I have read about the 2 pin sensors and how to check but my car has a four pin sensor. How do I check this version? Can I check all points to ground or are there specific resistances available from pin to pin?
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Old 02-04-2002, 03:48 PM
Gilly's Avatar
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Join Date: Mar 2001
Location: Evansville WI
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The pins are checked through the sensor for resistance. They are checked "across" the pins, like in an "X" pattern. The two resistances should be close to equal. I'm sorry I don't have the resistances memorized for a given temp setting, usually they will be upwards of 1000 ohms resistance, but again it varies according to temp.
Gilly
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