ATTENTION: HARDWARE TEST FOR 4-PIN BIKE SIDE HARNESS
PLEASE NOTE: THIS TEST IS FOR THE 4-PIN BIKE SIDE HARNESS (THE LABEL ON YOUR HARNESS STARTS WITH THE PREFIX "4P"). IF YOU HAVE A 6-PIN HARNESS, USE THIS TEST.
The bike-side harness requires careful installation to insure a complete and error-free flash process. About 90% of the issues that cause error codes we see can be traced to a hardware connection problem. This test is more definitive than the software test interface that a lot of users have suddenly started trying to use after seeing it in a couple of posts; without the proper steps and looking at the correct data, all it does is confuse the issue.
This test is easy to do, and requires just a small jumper wire or paper clip, and a multi-tester.
Take the bike-side harness connector, and remove the weather-seal cap (or disconnect it from your USB Data Link cable). Looking at the face of the connector (opposite the side where the wires are inserted), determine where each color wire (there are four: Red, Green, Yellow, and Black) pin is located. With your bike's ignition key turned on, use the multi-tester to connect the Red and Black wire pins by inserting the leads into the respective pin locations on the face of the connector. You should see a solid 12 volts; anything less means you have a connection issue with either the Red or Black wires (or both). Check them carefully to ensure that the pins are seated correctly (all the way into the ECU connector, and that the crimped portions are facing up towards the connector's locking latch).
If that test checks out, then connect the Green and Black leads with the multi-tester; you should see between 7-12 volts. Anything less means you have a connection problem with the Green or Black wire (if you saw 12V in the previous test, then the Black wire checks out because it passed that test already).
If that test checks out, then connect the Yellow and Black leads. If you hear the fuel pump priming, then you have a problem with the Yellow wire (Black checks out because if you've gotten this far, you've already tested it twice).