This is a original L20E/L20ET ECU wiring diagram...I know some people have been looking for this and could not find it, I found it after a very longtime searching all over the web. I the good part is that it is in ENGLISH! So yeah, here it is, hopefully it will get popular around the internet so it can be easily found. People used to say the 280zx ECU is the same as this one...only some things on it is the same not everything. Nevertheless, this is the proper one. Enjoy!