Ron,
Well the question marks are definite need for calibration. It is a very time consuming process which will take several hours. Like spending all day on Saturday without any distractions. The directions are kinda intimidating as to what the person that wrote it means in some of it. So read directions carefully. It not uncommon to have some tests fail and that adds to discouragement. But take your time and you will get thru it. Each section must be completed without errors or it won’t save to move onto next procedure.
You need basically most of what is on Table 4-1 in the service manual to get thru it. So review that list and read procedure before starting.
Craig
Craig Cramb