replied to your FB post... but will repost here
Check the FSM electrical section on page 43 (or 53, one is for CA vehicle). I think connector C-99 is the one you want for the OBD2. I would look through all of the pages at the bottom for C-99, and then make notes about what each pin does.....
From that one page, I can see that 1 and 7 go to the ECM and 14 goes to the ECM as well, but not without first going through a couple of things