New 912iSc Crank Bias Negative Voltage

Hi Scott.

Here is similar thread.  The similarities are more apparent on the second page where they discuss the same fault as you are seeing.  There was no positive findings, but the problem looks to have been resolved by removing and resetting the crankshaft position sensors. Their resolution is not very confidence inspiring, but at least it points you in the direction of crankshaft positions sensor CPS-2, which is connected to ECU Lane B.  

https://www.rotax-owner.com/en/912is-technical-questions/9056-is-this-an-indication-of-a-short?start=0

Try always starting with 3,000 RPM for 20 sec.

That ensures Lane B always  connects correctly with no warning lights.

Lance