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How to check your crankshaft position sensor on a BMW 740 (e38)

Here I show how to test the crankshaft and camshaft position sensors on a BMW 740i by measuring their coil resistances. You should measure around 500 ohms across the coil pins of the crankshaft position sensor, and roughly 1,000 ohms on the camshaft position sensor coil. Your E38 will not start unless the DME sees the proper pulse train from the crankshaft position sensor. The symptoms will be identical to a bad fuel pump. This is a safety measure to ensure that the fuel being pumped is actually being burned, (inside the cylinders) and not spilling out on the ground after a bad collision, for example. I should add, as youtuber "Hueristic" pointed out, that this is only for the 95, the Crank position sensor on later models is in a different location near the transmission. You need to get to it from´╗┐ underneath. For more info and pics see the following link: http://www.bimmerboard.com/forums/posts/1079582/


 


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