Remove the rear seat and lift out the storage box. There will be a yellow wire with a female bullet connector (on the right side as you stand behind the bike). I have made up a wire with 2 male bullet connectors on either end, plug one end into the yellow wire, turn on the ignition and within 2 seconds ground the other end of the wire to the frame (non painted part) and hold it there. The FI light will then flash codes at you.
Two long flashes + three short flashes gives fault code 23.
Three long flashes + four short flashes gives fault code 34
Once it's given you all the fault codes it will recycle from the begining again.
To get to stored codes and not just present fault codes repeat the above but instead of grounding the wire once and holding, ground it 5 times quickly and then hold it.
shiggsy i am new to the kawasaki world i came from suzuki (must say will NEVER EVER go back) i have a 2000 zx12r and my FI light has come on. i took advantage of your post with the ecu codes and it pointed me to the #4 injector (code 44). I changed the spark plugs and made sure the injector wire was not damaged can you or anyone else give me some insight on what to do next.
I have a 2000 zx12r and fi light came on and started running like crap I check codes and it gave me 51 #1 coil so I replaced all 4 and new plugs and light is still on and now getting two codes 51 coil again and 23 cam sensor im pulling my hair out can anyone help