Hi Jay, the FI (15 amp) fuse powers the ECU, the fuel pump, and the fuel injectors. When B.Green replaced the fuse and put the ignition on, the ECU and fuel pump didn't trip the fuse. When B.Green started the bike, only then the fuse blew. Ergo, we can surmise that a fuel injector (or somewhere along those electrical lines) could be the culprit. B.Green, could you try rule out the fuel injectors by disconnecting their connectors? If the fuse still blows, then you have a harness shorting/corrosion problem. If fuse doesn't blow, then it's a fuel injector problem. Refer to service manual on how to check fuel injectors.My Ninja 1000 Sx service manual (yes I know it is not the same) shows that positive battery power flows through the 15 amp FI fuse and is distributed both to the ECU, and to the relay box. In the relay box it sends power through the ecu main relay when that relay is powered up. Once it goes through that relay it goes back to the ecu.
Now that is not all that helpful really.
the bike starts and runs so thats a great thing. It tells me the ECU is fine, and I am assuming that the meters worked while you were running/riding it this last time before the fuse popped again? If so then the meters work.
The code 39 means the meter unit has not received any information from the ecu for 10 or more seconds. If the bike started and the meters worked you can throw this code out of your mind, it is simply a code that was triggered by the fuse blowing I would guess.
Thats the good news. The bad news is I believe you have a short or a corroded connection. The fuse is popping (thank God) because something is trying to pull to much power through it.
That can be difficult to find. I still think you need to go from connection to connection and look for corrosion, and also look for any signs of wiring harness damage, discoloration, dried water residue...etc
On the the guys on the 3rd gen section had a problem that turned out to be water getting into the wiring harness and corroding a common ground. Something like that can be very hard to find, even for a tech.
Electrical problems are for sure not my strong suit Boss. I wish I could be more help.
Yep, the cold doesn't bother him anyway.