so through my trials and tribulations with my truck being broke and my trying to fix the freaking thing, i've come across something that might be helpful to everyone. i have the Chiltons manual, which to be honest is a peice of crap. don't buy one. a friend of mine was searching around and found a site on the ttora series of sites. here it is http://www.ncttora.com/fsm/index.html
the site has all the manuals for tacomas, 4runners, tundras and fj cruisers. the manuals are the toyota service manuals in explorer and PDF formats. i hope this is helpful as its been a godsend for me.
it has all the wiring schematics and troubleshooting guides as well as trouble codes. it also troubleshoots individual trouble codes for you.
like i said, forget about Chiltons and Haynes. these manuals are where its at.