Author Topic: ABS again, (not driving skill)  (Read 346 times)

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Offline capnvini

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ABS again, (not driving skill)
« on: April 10, 2018, 09:06:28 pm »
Still wondering.
So my ABS light is rapidly flashing and of course does not shut off once you start moving. I have limited brakes, the light flashes away for awhile then goes out and I have full brakes again until I stop and turn off the bike. It usually is only a little while of driving before the flashing light goes off. Is this an electrical problem? New battery this spring.
I know the pump rebuild, pump replacement and conversion to ordinary brakes. Just wondering if there were other thoughts RELATED to this problem.

Thanks, Vince

Offline raesewell

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Re: ABS again, (not driving skill)
« Reply #1 on: April 10, 2018, 09:17:59 pm »
I think the ABS pump is telling you it needs some love.

Offline Phmode

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Re: ABS again, (not driving skill)
« Reply #2 on: April 10, 2018, 09:50:34 pm »
'Ang on! You want replies related to your question? That'll never catch on  8)

Offline Philip

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Re: ABS again, (not driving skill)
« Reply #3 on: April 11, 2018, 10:03:54 am »
'Ang on! You want replies related to your question? That'll never catch on  8)

Sorry to buck the trend,  but  i'll try to help with your question :)

One thing that will stop the ABS working is low battery voltage.
You say you've just changed the battery, but if it isn't being charged properly it will throw an ABS fault.

Connect a voltmeter accross the battery & monitor the voltage from start-up.

When cranking the engine the voltage will drop to 10 - 11v.
As soon as the engine starts it should rise immediately to around 13v.
Then over the next few minutes, if the battery is in good condition, the voltage should rise to just over 14v.

If it doesn't you could have an alternator or wiring problem.

Offline capnvini

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Re: ABS again, (not driving skill)
« Reply #4 on: April 11, 2018, 10:50:14 pm »
Thanks for that Phillip.
I will check that out as I have never watched it with the meter on it. See what I come up with. I've wondered about the voltage issue because of the way it acts at times.
Will see.
Thanks for the input

Offline raesewell

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Re: ABS again, (not driving skill)
« Reply #5 on: April 12, 2018, 08:00:41 am »
If the battery drops to 9.6 volts while starting you need a new battery

Offline capnvini

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Re: ABS again, (not driving skill)
« Reply #6 on: May 01, 2018, 02:38:24 am »
Checked voltage at start up. Was 12.9 dropped when starting and came back to over 14 quite quick. Stopped n started bike a bunch of times n of course ABS worked every time  >:(
I washed the bike just before goin for a ride with the wife. ABS didn't work first half of ride. Kept thinking it would come back on. After lunch it worked again. So do I have a ground some where?
The wife's Honda CBF1000 rode flawlessly of course.

Offline stevel

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Re: ABS again, (not driving skill)
« Reply #7 on: May 01, 2018, 07:41:25 am »
Next thing we need to know is the version of ABS on your bike - is it the earlier, servo assisted one, or the later non-servo type?

Offline capnvini

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Re: ABS again, (not driving skill)
« Reply #8 on: May 03, 2018, 02:49:37 am »
Servo assisted

Offline stevel

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Re: ABS again, (not driving skill)
« Reply #9 on: May 03, 2018, 08:22:48 am »
Do you have the necessary equipment to see and clear the stored error codes? Most likely they'll give big clues to the problem.

Oh, and how technical (mechanical) do you want to get with this? There are possible fixes for an ailing servo ABS unit if you're willing (and capable) of taking it apart.


Steve
« Last Edit: May 03, 2018, 11:15:53 am by stevel »

Offline capnvini

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Re: ABS again, (not driving skill)
« Reply #10 on: May 10, 2018, 03:53:08 am »
Out at work. Sorry not on here all the time. What do you mean by how technical? I can get to unit. Electrics are not my strong point. I know there is an option for rebuilds. The bike is maybe worth $5000 Canadian so I am not interested in spending $2500-3000 on a new ABS pump. It's amajor flaw in a bike that I actually like more as I ride it more. Open to ideas. Thanks

Offline stevel

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Re: ABS again, (not driving skill)
« Reply #11 on: May 11, 2018, 08:41:58 am »
ok, one possible explanation is that it's an ABS sensor, hence the question about diagnostic tools being available (to examine the real-time values coming from them). Could be a damaged or broken wire, could be that the ABS ring is damaged, bent etc. Pray to whichever god you believe in that it IS an ABS sensor, because the alternative is the pump.

If it is the pump, the usual failure mechanism here is that water gets into the brake fluid (how long do you go between changes?), finds the one component in the system that's made of steel (i think it's a valve), and rusts it in place. When the bike starts up, it tries to stir the ABS pump, looking for a change in pressure in the circuit to verify everything is working ok. As the valve is stuck, pressure doesn't change, and you get the ABS failure light flashing. If you feel brave, you can take the pump apart and find this valve to clean it free of rust, after which it should work until more water gets in the brake fluid and rusts it again.

Oh, and you might wanna change the brake fluid whilst you're there...

Offline capnvini

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Re: ABS again, (not driving skill)
« Reply #12 on: May 26, 2018, 03:33:33 pm »
Hey there.
Ended up taking the bike to  local restorer/mechanic because I was not getting anywhere myself. He did full flush and detective work on the issue. Ended up it was the switch at the front brake lever that was faulty. Cleaned up switch and fiddled with adjusting it. Problem solved! The way it acted I wondered about some electrically fault some where. All for $200 Can! And he did it right then and there, no appointment etc. Nice.

Offline Phmode

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Re: ABS again, (not driving skill)
« Reply #13 on: May 26, 2018, 08:49:33 pm »
Good result if it was that...