You should have a D16z6, not a d15b7. Otherwise you don't have an EX or the previous owner swapped out the motor for one with less horsepower.
But yeah you've got to be a little more specific on exactly what "wiring diagram" your'e looking for. Do you mean the ECU diagram? If so look below, but why would you need that anyways?
But here's an ECU diagram for the d16z6, use at your own risk because I've only had 1 person look it over and comment on whether it is correct or not (could mean no one else had a clue or could mean I'm right):
http://spoony.20m.com/d16z6.htm
If you can please give a little more info on exactly what you need, and for what. People will be able to give you a lot more info if they know exactly what you need.