The service manual only has a listing, no diagnosis information. The book is helpful for BICs light blink codes. For actual step by step information on how solve a code, there is a separate manual for that. Besides wiring and hydraulic schematics, the service manuals are pretty useless in my opinion.In the service manual there is 1 page up in the front section (I think that's where it is) that has all the codes listed with a description. If you have the owners manual they codes are also in there. There should be an index in the back that will tell you where to look for things. Hope this helps.