1150 GSA ABS Failure !!!!!

[lncmgl]

Just took the bike for a 30K service. The ABS light was flashing and it was not making that "clink" noise. We put the bike on the computer and it came with a failure. We reset the unit and it worked fine for a short time but it is still the same and still flashing lights. I don't want to think that my ABS is gone. Anyone experienced this fault before? Any suggestions?

 

[oblertone]

Don't think ...

... what you like, but I reckon yer battery's fecked. Change that and see what happens, if the problem persists, start thinking

 

[Hong Kong Nick]

Similar issue ... failed servo ... bought braided brake lines and bypassed the servo and ABS. A lot cheaper than a new servo. Can't say for sure in your case but that's what happened to my poor baby ...

 

[Bryn]

... what you like, but I reckon yer battery's fecked. Change that and see what happens, if the problem persists, start thinking

Battery needs to be above a certain voltage for the ABS to work properly I'd be starting here as well

 

[Timolgra]

Battery needs to be above a certain voltage for the ABS to work properly I'd be starting here as well

That's right, unless you have a decent battery may need to ride a couple of hundred yards, switch off and start again

 

[John Armstrong]

Are all the brake fluids correct?

Are the ABS sensors all ok?

Are the brake pads ok?

Do you have servo brakes?

How old is the battery?

 

[MattW]

What are the flashing lights doing - it matters.

When you key on, but before you start they should flash together until the self test has completed (this is in two parts and completes as you start moving and get the 'clunk'). If any part of the test fails, the lights flash alternately.

So the point at which they start flashing alternately can help you identify the problem. If it happens before you start up, it's an item tested at power up (wiring fault, sensor etc) or a stored fault, if it's happens when you start it's almost certainly a battery problem (the ABS requires a certain voltage to be present when it completes its 'movement test' - starting with a dying battery will drop the voltage too low). A binding starter motor can also cause this fault, even with a good battery. As the ABS unit can also store faults, if they flash alternately as soon as you switch on, try a reset first (easy to do yourself).

If it's a battery problem you can often persuade the ABS to set by riding for a while, stopping and turning the ignition off and then starting again as normal with a warm engine. It can also help to pause after keying on but before actually starting (I've got into the habit of counting four flashes on the ABS lights before I start). Of course you should turn off any electrical accessories, lights etc before starting.

So, reset the ABS and see what the lights do, but most often its just a battery problem. The ABS on my 1100 often refused to initialise when I bought it, a new battery cured the problem.

 

[Big E]

Check the fluid levels in the ABS unit.

Check pads and disks for wear.

 

[motobiker]

Check the fluid levels in the ABS unit.

Check pads and disks for wear.

Should these not have been checked as the bike has just had a service?

no.. seems to me the servo has gone terminal and heading for servo heaven.


Shame some boffin cant come up with some way of removing the servo on these later 1150s and keeping the ABS. whoever could come up with that little trick for a good price would be kept very busy methinks.

 

[lncmgl]

Are all the brake fluids correct?

Are the ABS sensors all ok?

Are the brake pads ok?

Do you have servo brakes?

How old is the battery?

All the sensors are ok.

new break pads fitted

not sure how old the battery is but never had problems on the first start.

I think it is non-servo

 

[lncmgl]

The light are flashing alternately. I tried riding couple of miles and switch it off and back on again, still the same problem. How do I reset the ABS by myself?

 

[MattW]

How do I reset the ABS by myself?

I have an 1100 so have only done it on the early ABS 2, however the technique is exactly the same, you just connect to a different plug.

It depends on the age of your bike - do you have a big round diagnostic connector on top of the airbox, or is there a small three pin socket with a blanking plug in it under the seat?

 

[lncmgl]

under the seat

 

[Pekkavee]

How do I reset the ABS by myself?

Have a look:

http://www.largiader.com/abs/absfault.html

Pekka

 

[MattW]

under the seat

Do this (taken from http://www.largiader.com/abs/absfault.html)

Resetting ABS2 on early bike

* Locate the diagnostic connector under the seat. Remove it from the blanking plug.
* Insert one end of 20 cm wire into the middle socket of this connector.
* Ground the other end firmly to a metal bolt in the area (and keep grounded).
* Turn on ignition. You should see the lights flash alternately.
* Hold ABS button down for about 8 seconds. The bottom ABS light will stay on, and the top one off.
* Release the ABS button. If you have successfully reset the ABS, both ABS lights will come on. If you have failed to count to 8, or your ground is not good, the top ABS light will stay off.
* Turn off ignition, remove wire.

Edit: Pekka beat me to it

 

[John Armstrong]

I think it is non-servo

What age is the bike?

Does it have 4 or 2 spark plugs?

Does the rocker cover have a long plastic cover or something that looks like a lollypop?

If you start the bike up and put the brakes on do you hear an electric pump noise?

Just because it starts ok doesn't mean it's causing the ABS to fail its self test.

 

[MattW]

Does it have 4 or 3 spark plugs?

Wossat then? A twinspark with one plug fallen out?

 

[DollyRocket]

If the lights are flashing alternately then it is low levels in the servo


Gen AND ABS flashing alternately at 1Hz = Fluid level in Intergral ABS too low.Low-voltage

This is what was wrong with mine when I changed the pads - as well as the reservoir on the handlebars, there is an additional reservoir in the servo itself (second circuit) which I didn't know about at the time.

 

[MattW]

If the lights are flashing alternately then it is low levels in the servo


Gen AND ABS flashing alternately at 1Hz = Fluid level in Intergral ABS too low.Low-voltage

This is what was wrong with mine when I changed the pads - as well as the reservoir on the handlebars, there is an additional reservoir in the servo itself (second circuit) which I didn't know about at the time.

He's not got a servo.

 

[John Armstrong]

I think it is non-servo

He's not got a servo.

Does he know?

Wossat then? A twinspark with one plug fallen out?

BTW changed my 3 to a 2