rmancuso
New Member
Posts: 3
Registered: Apr 29, 2022 10:35:56 GMT -7
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Post by rmancuso on Apr 29, 2022 10:54:16 GMT -7
Hey all, this is my first post here and I'm glad to be a member after lurking for so many years...
I come to you with an unfortunate predicament. I have a '18 MT-10, ECU flash done by Nels and de-cat with Austin racing pipe. All was working fine for the past two years, no lights no issues no complaints. I recently went to install my battery after winter storage and stupidly reversed polarity not paying close enough attention, causing a fuse to blow. I actually found the thread on how to replace it on here, which was super helpful.
Fuse has been replaced and now bike starts right up and runs great. However, I have had a check engine light ever since i replaced the fuse. The fuse in question was the ETV (electronic throttle valve). I recently changed the spark plugs as well as the air filter. In doing so I removed the gas tank, unplugged the fuel hoses and fuel pump, and put everything back together. So thats the only work that has been done recently. I work at a Yamaha dealership, and had one of the veteran techs plug in his code reader. He said that it wasnt throwing any codes, despite the engine light being on. I am both stumped and a little disappointed. I emailed NELS at 2wheeldynoworks, and his response was that only a fault code can command on an engine light. So im left with what to do now and i thought i might try here to see if any one has some insight. Thanks so much ,
R.J.
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Post by willl84 on Apr 29, 2022 11:52:40 GMT -7
That's really strange, never heard of that before. I wonder if reversing the battery might have screwed something in the ECU that's causing it to always light the light even without a code present? I honestly have no idea but I'm intrigued
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Post by RedAndBlack on Apr 29, 2022 14:45:24 GMT -7
I have absolutely no idea. Best thing I would recommend is to check for a wire short.
Could also try disconnecting the battery overnight and then hook it up again, see if code goes away. Simple resets like that sometimes do wonders.
Also, this is a new battery right?
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rmancuso
New Member
Posts: 3
Registered: Apr 29, 2022 10:35:56 GMT -7
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Post by rmancuso on Apr 30, 2022 10:30:01 GMT -7
Yes brand new battery. I am going to try disconnecting it later reconnect and see what happens.
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kaos90
New Member
Posts: 15
Likes: 4
Registered: Feb 2, 2021 21:44:04 GMT -7
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Post by kaos90 on May 1, 2022 14:06:10 GMT -7
Most OEM electronics are protected against reverse polarity. I would check every fuse. Make sure to use an ohm meter when checking fuses, a fuse can be failed but not appear failed.
No sure why batteries seem to get installed with polarity reversed, in an effort to prevent this, wrap some colored tape on the positive cable end and same color tape on the positive battery terminal.
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Post by parthz8 on May 8, 2022 1:38:39 GMT -7
If you suspect ECU or tuned bin file, try going back to default (return to stock) ECU, if available with 2wheeldynoworks. Do this only after making sure hardware, fuses and good. If ECU throws NO Code with default stock bin file, than try to install back tuned ECU file to see the result.
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