The factory shop manual ships with every Infiniti Q45 (as far as I know).
The only problem is the FSM is wrong sometimes, for example, for a fuel pump or fuel pump control unit burnout, it seems we're better off going to NICO & Yahoo to speak with the online mechanics than to religiously follow the overly diagnostic procedures in the FSM.
FSM:
formatting link
car owners:
formatting link
:
formatting link
If you follow the FSM, you'll end up replacing the fuel pump control unit and leaving the working fuel pump; whereas the correct repair is to replace the working fuel pump & resolder & reinforce the fuel pump control unit #4 ground wire to the fuel pump control unit connector. It's the opposite of what the FSM recommends that worked for me.