But that does not fully address the request. Still needed:
Where each is.
What each really does/means.

Personally, I had a hard time at first finding all the modules in the car. The service manual is helpful, but not as good as I expected it to be.
And for an actual "what does each do?" the service manual and student guide both combined, even still fall short.

And just TRY to find the SKREEM in the wiring diagrams! I finally wrote it's page numbers on the front of the wiring diagram manual I have.

Sounds like a project for one of us.... but Im currently working on the v2 of my "finding battery drain" paper. That's enough for now.