update: I figured out how to view the codes, its convoluted, but doable, the PDF service manual does give codes and for each code a diagnostic/ repair procedure. the manual says I need the scan tool to clear codes. In some automobiles the codes will clear with the battery unhooked for a period of time, will such a procedure work in this situation?
At present, I think transmission.All you ever needed to know about a VCM, this is tier4B version. Other tiers are just missing a few of the codes and symbols as they have no DEF.