Triumphrat

Ripper · 11-07-2012, 07:51 PM

Quote:

Originally Posted by thruxton09

Thanks for your help guy's ,I think I will get the dealer to try & sort it out. The bike is due for its 30,000 service so I hope i nothing goes wrong when I ride it the 180 klms over there for it. She seems to be going alright apart from those lights .

According to my circuit diagram the leds are powered from fuse 10 through the ignition switch and the ECU switches them on by providing the ground connection internally. First thing to do is check for voltage on the red/blue wire by placing a multimeter across the red/blue wire and the battery -ve with the ignition on. If there is voltage on the wire the fault must lie with the ECU.

thruxton09 · 11-08-2012, 03:08 PM

Thank's Ripper, thats starting sound scary & expensive now. :0

DEcosse · 11-08-2012, 11:00 PM

Quote:

Originally Posted by Ripper

According to my circuit diagram the leds are powered from fuse 10 through the ignition switch and the ECU switches them on by providing the ground connection internally. First thing to do is check for voltage on the red/blue wire by placing a multimeter across the red/blue wire and the battery -ve with the ignition on.

I said pretty much all that in post #2!

Except you have the Fuse ID incorrect however - definitely Fuse 8 - Fuse 10 is on the output to Parking Lights, not the input to the Red/Blue circuit
Current flow goes:
Battery -> Fuse 11 -> Brown Wire to key-switch -> Out on Blue/Yellow from Key-Switch -> Fuse 8 -> Red/Blue Wire -> Instrument Back Lights & LEDs
Red/Blue also then feeds as a secondary branch back into another pole of the key-switch and out through Red/Orange wire and then through Fuse 10 out to Parking Lights

If the panel back-lights are on then the red/blue circuit is good eliminating fuses/key switch (and also if the park lights are on, the Red/Blue circuit must be hot in order to power those too)

Extremely unlikely to be ECM error - most likely connector issue I would expect, at the LED interconnect itself.

thruxton09 · 12-08-2012, 01:50 AM

Well I finally got time to get my bike in for the 30k service & guess what, by the time I rode the 180k there the waning light's were working fine. The mechanic tried everything to get the fault to re'occur but it didn't happen . The diagnosis, maybe a faulty low fuel sensor wich is about $300 . Think I"ll wait till it die's again. All good & thanks for the input fella's . Cheers

Hotboppincat · 12-09-2012, 03:23 AM

Quote:

Originally Posted by thruxton09

Thanks for your help guy's ,I think I will get the dealer to try & sort it out. The bike is due for its 30,000 service so I hope i nothing goes wrong when I ride it the 180 klms over there for it. She seems to be going alright apart from those lights .

I've only just got a 2012 Thruxton, and just before that I purchased a new Honda CBF125 for my Wife. These were the first bikes we have owned with an engine management system built in. I would rather it didn't have one, none of my older bikes did, and I got on fine for years without all this technological jiggery pokery!!! lol

However, I am now learning to embrace this new technology. I can see the sense of it as a useful tool in fault finding.

But do things really need to be this complicated???

Forchetto · 12-09-2012, 05:49 AM

Quote:

Originally Posted by Hotboppincat

But do things really need to be this complicated???

They do I'm afraid. If today's emission and noise Directives are to be met, manufacturers have to go on to electronic engine management and injection systems. Even stuff like Indian Royal Enfields have had to go this route. Makers that can't manage it, like URAL, are sidelined and often have to leave certain markets altogether.

This becomes more difficult for them with the smaller engines, small injection systems are not easy to make well. Honda are at the forefront with tiny systems for things like your CB and the Wave 110i.

Imagine how tiny the injector holes have to be for such small cylinders, see what ours are like (for a 432 cc cylinder) on this photo courtesy of Pieman. For scale, the diameter of the injector nozzle shown is just 8 mm...:

Hotboppincat · 12-10-2012, 12:31 AM

I know, Governments have really tightened the screw on emissions, soon they will have engines running on almost fresh air!! My Wifes CBF nearly does, the book claims 140 mpg, although realistically it may be close, but not that good. I must admit, I use very little fuel!

Which is nice!

What I think is a real shame is the lack of 2 strokes available now. I realise they are the worst polluters, but I liked my old RD Yams, they had a certain something that a 4 stroke just hasn't got!

Nothing like the smell of 2-stroke smoke and the crackle of expansion chambers bouncing off the houses on a cold winters morning!

Sigh!

thruxton09 · 12-19-2012, 10:19 PM

Update, Well the warning lights decided to play up again but this time I found & solved the mystery. No it wasn't a suspect low fuel sensor as I could get the lights to go on & then off by wriggling the harness . turns out there is a connection of 4 wires that are just crimped together inside the harness located near the coil & one of these had pulled out . It took some time to find it as I had to strip the insulation tape of until i found the culprit but once it was reattached everything worked as it should . Cheers & merry christmas .....