before I forget, one of the guys on our Aussie forum found this free download of the "Powertrain Diagnostic Procedures Manual"

It can be used in conjunction with the FSM, but has advanced fault finding flowcharts.

At ~300pages, it appears to be what in-house techs would have used

the free download is for OBD1 vehicles, but still quite applicable to OBD2

https://drive.google.com/file/d/0B0n...JobGVvbjg/view