Wiring Diagram needed

I have a 2004 Tacoma v6 4wd
Last year it suddenly started running weird and couldn't get the rpms over a certain point
Checked obvious- fuel pump- fuel pressure etc
spark plugs- changed timing belt ( timing is on- verified by dealer and other mechanic)
tried used ECM no luck
Took it to a mechanic who was unable to diagnose then to dealer who $600 later was unable to diagnose and recommended sell for part ( 125,000 mile )
The truck will now only turn over and not run at all- obviously Im getting frustrated
As a last resort before I do that I was considering changing the engine wiring harness or going thru it and checking for any bad grounds or connectors
If anyone has a wiring diagram or any advice- it would be greatly appreciated
Thanks
gtrms

 

Here are the diagrams for automatic and manual trucks for the powertrain control at least. If you need one for a different system like accessories or starting or something let me know.

 

Thanks so much!!- I'll keep you updated!