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Old 02-27-2011, 01:38 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Thanks for that pinout and location for the connector to test on the older E39s.

If I didn't make a mistake, here is the relevant diagram for anyone wishing to test the diode drop and resistance of their four wheel speed sensors on the older E39.

Notice that there do NOT seem to be metal contacts in the holes apparently designated below for the wheel speed sensors ... so we'll need someone with the older E39 to doublecheck our diagram below.

Also note that I have no idea which is the forward-biased direction and which is the reverse (I figured it out on my newer model E39 by trial and error); so, again, I ask the next older-E39 that undergoes a wheel speed sensor diode drop and resistance check to let me know which directions are what.

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