Are the Diagnostic Manuals on TechAuthority.com in addition to the FSM or part of it

I have a FSM, and was looking to see about the Diagnostic Manuals on Tech Authority (techauthority.com). Are the Daignostic Manuals excerpts from the FSM or completely separate and new information. I thought there were Diagnostic Manuals available that have different information in them than the FSM. My 2001 FSM doesn't have ALL the detailed diagnostic information. Maybe all FSM's don't, I dont know. Thanks.


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The FSM is generally aimed at a garage tech with a remove and replace focus. The diagnostic manuals generally have more information. For example the Renix Fuel Injection Diagnostic manual explains a lot more of the theory and how its supposed to work and has better diagnostic information. The Renix FSM itself is very, very thin. I wouldn't necessarily go out of my way for it, other than it does have a bit more info on testing individual sensors.

The later FSMs are generally much more detailed and I don't think I've seen much in the way of seperate diagnostic manuals.