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Discussion Starter · #1 ·
I installed the m4 exhaust and had to remove the headers. upon putting the headers back on the bike, it was idling very high. the check engine light came on and the self diagnostic system is showing code 45. What does this mean and how do i go about fixing it? thanks in advance.
 

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I installed the m4 exhaust and had to remove the headers. upon putting the headers back on the bike, it was idling very high. the check engine light came on and the self diagnostic system is showing code 45. What does this mean and how do i go about fixing it? thanks in advance.
My best guess would be something with the o2 sensor? How did you go about installing it?
 

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I don't mean to be insulting here, but is it definitely code 45? I've gone through a few Yamaha service manuals(but not the r3s yet) and don't remember ever seeing a 45. Could be a new code for this bike but Yamaha tends to carry the same codes across their whole line
 

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Discussion Starter · #5 ·
I don't mean to be insulting here, but is it definitely code 45? I've gone through a few Yamaha service manuals(but not the r3s yet) and don't remember ever seeing a 45. Could be a new code for this bike but Yamaha tends to carry the same codes across their whole line
Pretty sure that's an error code, never shown that before always the odo
 

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Fault code 45: POWER SHUT OFF: INCORRECT BACK UP VOLTAGE IS SUPPLIED TO ECU

1st step is to check battery leads to see if any are loose.

If that doesn't work, check the starter relay coupler, check the back up fuse condition. Finally check wire harness continuity. If nothing else, you have a bad ECU.
 

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Idk what the code means... But I just got the m4 exhaust as well. I had the dealer install it, And it sounds great! Awesome choice. Love how it backfires!

Sent from my SM-G925T using Tapatalk
 

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Fault code 45: POWER SHUT OFF: INCORRECT BACK UP VOLTAGE IS SUPPLIED TO ECU
1st step is to check battery leads to see if any are loose.
If that doesn't work, check the starter relay coupler, check the back up fuse condition. Finally check wire harness continuity. If nothing else, you have a bad ECU.
YOU sir... are the R3 forum sensei! :nerd:
 

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PLZ post picture of page with error codes mr service manual... PLEASEE :)
 

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Really? Everywhere I've read so far, it's normal for it to pop with the m4. Is it because of the reduced back pressure?
Most likely.
It should be smooth up and down the entire RPM range. If not, the air/fuel ratio is off somewhere in the map.
That is what causes the pops and rumbles.
The stock exhaust doesn't do that, because the stock map is tuned for the stock system. The O2 sensor has a limited range.
The ECU won't compensate outside of that range.
 

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PLZ post picture of page with error codes mr service manual... PLEASEE :)
Yeah, the error code pages would be loved by many
I would, but it is about 6 pages for the basic error codes. Then, to get to the in depth solutions like I added to my original response, is just from the list of about 15 pages for the solutions for just the fuel injection system.
 

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From front page of Service Manual:

"Any reproduction or unauthorized use without written permission of Yamaha Motor Corporation, USA is expressly prohibited".

So you guys (on this and other threads) have no problem asking Cap, me, or the some of the other guys who bought one to risk ourselves because you're tightwads? Most of us with manuals will help out when we can by telling you what the code means, etc., but try not to ask for the proverbial inch and then expect a mile.

Come on - please don't ask people to do that - buy one yourself - they don't cost that much.
 

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Yamaha Brazil does not sell service manuals and it sucks.
Information here is money. They mkes EVERYTHING to have your money, and when you take the bike to the oficial dealer, nobody knows anything about the bike. You spend a lot and does not have your problem solved.

If someone wants to send me a service manual, I'll be happy to pay for it :)
 
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