Shawn, that MB pinout is unfortunately for PCB1-11E Rev B, whereas this engine uses PCB1-11E Rev A. Sadly, they are totally different.
I finally tore the MB out to examine it for burned traces, and ended up doing my own pinout diagram. (Needed to have that one anyway) Found no problems with the MB; everything checks out as it should. No closer to a resolution of the problem.
Rod