Shane Stump
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I talked with the 3rd dealer's tech about an hour ago and he is going to bleed it.... Yamaha is also telling them to remove the accessories (which are connected directly to the battery). I have a feeling my best solution is to have my friend remove all of my accessories, return the bike to stock, sell the accessories, and trade the bike in.Hmmmmm. According to what I read in my SM, if you turn on the ignition, see a SH-26 Fault Code, then turn off the key, the Code gets stored in the MCU memory. You won't see it again on the display (YCC-S indicator) unless you enable the Diagnostic Mode by shorting the YCC-S test coupler in the left front of the bike with a special switch (or simple wire), and go through the procedure to read the Codes and deal with them. The SM says the bike is disabled (won't start if not yet running - won't shift if running) if SH_26 is read until the YCC-system is reset and no more Fault Codes are read.Gary,Hello Shane. Some quick questions out of curiosity and I'll quit making things worse for you. Answer only if you have the patience and time.
According to the SM, once a SH_26 Fault Code is detected to bike won't start or shift. Have you ever been able to start the bike or shift without clearing the Fault Code(s)? Has the Fault Code(s) ever just "disappeared" after being detected? Have you ever cleared the Fault Code(s) yourself, and then had the problem go away for some time?
The clutch bleeding and release stroke test procedure appear to be a PIA, unless Dan's method is used. I'd make sure the Service Personnel actually performed them as he has suggested.
The SM also briefly mentions that the connections to the MCU are subject to poor connections from dirt. Have they been periodically removed and inspected?
Gary in Fairbanks
Sometimes I can clear the SHFT_26 by rocking the bike back & forth and it starts right up! Other times, I can sit there for hours and it won't get out of the mode. I asked Yamaha if the service was done and they were told by the dealer that did it that it was done correctly (so I have to assume it was). I don't know about the MCU ... I will have to ask the dealer when they call me with the prognosis!
BTW, thanks for the ideas!
Best Regards,
Shane
Soooo, how did the bike start after reading and storing the SH_26 Code? I doesn't make sense to me that the Code was cleared by just rocking the bike back and forth, and not going through the reset procedure they describe. I think I'd check the MCU (AE brain) connections for integrity as a start for the reasons described below.
I suppose it's possible that if either power to (B+ via the YCC motor fuse circuit), or ground from (B- via a bad connection as mentioned before) goes open, the MCU's power is momentarily interrupted and it's memory is lost. Next time this problem happens unplug the YCC motor control fuse (location?) to remove B+ power from the MCU and replace after a waiting period. The fused B+ power doesn't go through the ignition switch and comes directly from the battery B+. If the Code gets reset and the bike then starts, we'll know that the memory's been reset to "0" Fault Codes by power interruption. You could do the same with the MCU ground connection of course. Or rock the bike if there's a bad connection for either B+ or B-.
Then the bike may run until yet another SH_ 26 is detected. The source of the SH_26 indication may come and go, but really needs to be addressed once and for all. If the clutch hydraulics are properly bled and the clutch release proper, then it could be that the clutch actuator sensor (#55) and/or motor (#56 in the wiring diagram) are defective (one assembled unit I believe), and give rise to a high current reading that sets off the Fault Code. Replace and test.
Move to Fairbanks as DC has suggested. Today it's +36F with rain in the valley floor, and snow at higher elevations. No chance for throwing Fault Codes today. GL.
Gary in Fairbanks
I really like the FJR but if I can't get Yamaha to diagnose / fix it in a logical fashion (as you and others describe), I am just going to keep going through this process.
Thanks for all the input.
Best Regards,
Shane
P.S. It was only 90 or so hear today :dribble: :dribble: !