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Originally Posted by yal
Oh ok. Ignore me 
But isn't that weird. I though pin 3 was the pin to read? |
Agreed.
I haven't found a satisfactory answer as to why but I have the same circumstances when I read the 86'. It confused me quite a lot when I first started trying to diagnose an emmissions problem. Finally I reversed the pins and got 70% KOEO as a baseline. I have heard refrences to mercedes doing it backwards (maybe %-off instead of %-on) but I'm not sure to which years this applies.
