1228746 ECM pinout question

[WEG1192 at aol.com]

I have a 1228746 ECM and although its almost identical to the 7747 as far as 
pinouts are concerned, it had something called crank enable at B6. Since 
crank is on C9, what is on B6? I'm guessing its some sort of VATS input? JW 
TIA
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