Bonneville America Forums Forums Technical Forums General Tech engine management light

i was fitting a new light to my newly bobbed fender and blew a couple of the fuses. when i replaced them the engine management light was on and has stayed on . bike runs fine -did a 20 mile trip with no problems .anyone got any ideas on why its on? . should i be concerned?

What bike have you got Ian?
I was lucky then, fitted my bobbed rear mudguard a week or so ago and managed to re-wire the back end without blowing anything up!
Bonus

its 10 month old speedy. fuses blew when i shorted one of the wires(not on purpose!!) replaced the fuses -bike runs fine but light is on -not sure why its not going off .fitted a sparto rear light -it also works fine

Most likely it is nothing to worry about. The ECM will throw an engine light after a short. It's just alerting you to the short (which you already know about but which is now fixed). If that's all it is then the engine light will go out after a fixed number of re-starts. I can't remember the exact number (maybe 10) and I can't refer to the service manual as I'm at work.

You might try disconnecting the hot side of the battery for a bit & reconnecting it...might re-set the ECM.

Yeah, except disconnect the ground, safer.

you could use tune ecu to comand the 'reset the adaptation'
that should clear the faults

i reset it using a workmates £15 code reader- no more warning light

For future reference the ECM will reset itself after 3 hot/cold cycles, then the light will go out if the fault is no longer there.

A hot/cold cycle is running the engine up to normal running temp and then letting it cool down again.

Got my America in Dec 12. Luv it! Out on Saturday when em light illuminated. Taking back to Triumph today for them to plug it in.
There's no apparent loss in performance so assuming no major problems is this a common fault with these bikes guys and gals?

No it's not common. The times it has occurred on this forum is usually related to some mod that hasn't been done quite right. Like an electrical short or incorrect resistance after AI solenoid removal. I haven't heard of it in combination with any major issue or fault. Let us know what fault the ECM reports when your dealer reads it.

BTW ... Congrats on your excellent choice of motorcycles and welcome to the forum ... Equally excellent for help, info and an eclectic mix of characters ... Generous friendly nut jobs.

Hi Richard, thanks for reply. Been to dealer - the problem related to a sender unit which has been replaced under warranty. Had great ride out this afternoon!
....and big 'Hello' to all friendly nut jobs out there!
Cheers, Rob

Welcome aboard Rob.
Where you from chap?

"Friendly nuts" are really members of the Triumph Insane Asylum ...... Glad you are now part of the group and welcome aboard.

If you have a problem......ask and who knows....you might get the right answer, along with some friendly advice on the vicissitudes of life...

Thanks all!

Fm Peterborough, UK

Off the road again for 2 days: same problem as before - airbox sender unit - replaced under warranty......again!

Hope this isn't going to recurr every 250 miles!!

An air box air temp sensor or barometric pressure sensor fault is not common. To have two go bad seems suspicious. Maybe there is a bad batch of sensors or (seems more likely) there is a fault with your wiring loom or ECM (ECU).