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2015 Original Classic
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Discussion Starter #1
Hi All,
first post from a new user - owned a Classic from new since 2014.
I have a lithium battery fitted to my 2014 RNineT. I had a little battery booster cable fitted, but when disconnecting it, I clumsily/accidentally shorted the cable and it welded itself together for a couple of seconds - smokey - until I could separate the cables ! The key was not even in the bike when the short happened. The battery has cut itself off for a while ( no ignition lights or response when they key turned on ) and then provided current again after a few minutes. Originally the fuel pump didn't appear to pump up with the key and the motor wouldn't start. After a few more tries on the starter I can hear the fuel pump come in and the bike starts but super rough - like it's running on one cylinder. I have spark to both plugs, but it runs super rough and is not rideable.
The early bikes didn't have a physical fuse and relied on the CANbus to manage shorts etc.
My GS911 report is reporting a fault on the engine controller - fuel pump 10168 - Fuel pump voltage 9.61v - Fuel Pressure 0.05psi - Engine RPM 240.0.
So has anyone suffered a similar problem post shorted battery ?
Even though the fuel pump is clearly 'spooling up' pressure ( I can hear it as normal when ignition is turned on ), could the injection system be faulty or the fuel pump control/driver module be faulty/damaged by the short. Is there a way to test the fuel pump control/driver module once removed ?
Thanks for any ideas.
 

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With the ignition turned off, have you tried disconnecting the positive lead to the battery at the battery terminal, leaving it for a couple of minutes and then reconnecting it again? This might reset the bike ECU to some extent. Just a guess.
 

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101 Posts
+2 on ECU reset and check all of the fuses. Sometimes a bad battery can cause other electrical systems to fail. If you have a spare motorcycle battery try installing it to see if it that helps.
 

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2015 Original Classic
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3 Posts
Discussion Starter #4
I’ve run it with a new battery and also disconnected the battery for a few days to try to reset the ecu with no effect. Is there a particular way to reset the ecu, ecu voodoo ?
Am recovering from surgery atm, and can’t ride, so I go back the my nineT problem every week or so, otherwise it’s a depressing type of problem. Next step is borrow the ecu off my mates nineT, swap that out and see how I go. Then try the fuel pump controller swap.
 

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You may have shorted a cell in the battery, and running the bike later with a shorted cell may have caused another issue. Have you cleared the codes and checked to what codes come up again? Sounds like the fuel pump may have gotten damaged.
 
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