I don't know if I am having a car issue or I am just dumb, but I cannot get this to work. I've tried several dozen times with no results.This worked. I had realized that the "Trip" menu had to be highlighted for part 3 to work. For those that are trying to figure it out, you highlight "Trip", but don't hit OK, keep it selected and then do part 3. You will then get to the menu which gives you diagnostic data. And on another note, I don't see this anywhere in the service manual.