ABS Fault on Rear Wheel

Big Fred

Big Fred

Registered user
Joined
Jan 29, 2011
Messages
29
Reaction score
0
Location
South Yorkhire
Hi All,
Yesterday, some tosspot left a huge loop of electrical cable in the middle of the road and Muggins here, ran over it.
It wrapped itself around the rear wheel, wedging itself in the rear caliper, thankfully not enough to lock the wheel, but enough to make me change my kex when i got home!
I now have a fault on the rear brake that goes like this. When i turn the ignition on and fire the bike up, the warning triangle stays on, the Brake Failure warning light flashes real quick and theres no servo noise when i press the brake pedal (although there is some braking to the rear wheel)
There's also a clicking noise from the ABS relay as i assume it tries to perform the self test. Is this likely to be something as simple as changing the relay or may i have damaged the ABS Sensor? I can't see any obvious damage though.
Not sure which version ABS it is, if this helps its a 2003 1150 with Brembo calipers
Thanks in anticipation
 
I don't know about problem , just very happy you are in one piece , I was dodgeing a garden rake on motorway . Glad you and bike home in one piece .
 
Can't see why the relay would be damaged when the physical damage would have been at the back end. :nenau

Check clearance between sensor and the ring on the back wheel......make sure there's no scraps of crap in there and spin the wheel to make sure there's no warp

Also check the microswitch behind the rear brake pedal....that can get bent out of shape or knocked a bit..make sure it's free and working, you should be able to hear the tiny click as it switches.
 
Rake on the motorway? My mind boggles with the thought of what that would do to a bike!

Big Fred. Did the cable go between the disc and the drive i.e. could it have fouled the sensor? If yes then surely that's the first place to start looking... It would be a little uncanny if the ABS fault wasn't related to what happened with the cable...

keep us posted. We need to know what to do after riding over cables (and any takers for the rake, we'd love to hear how to handle that one!)
 
Thanks for replying so quickly.
Yeah, the cable was wrapped around the wheel and under the caliper ( i had to remove both the caliper and wheel to get it out ) so i guess it would have got into the sensor area. Is this easily damaged?
 
Maybe it's as simple as removing the rear wheel, caliper and ABS sensor then carefully checking the components and reassembling (making sure the sensor gap is correct).

I don't know if there is a diagnostic test to check the sensor when it's off the bike? Anyone know? Maybe you'll see damage to the sensor on closer inspection...

Just a thought. Is it possible the cable lashed around enough to damage other cables (radially) before bunching up around the hub? Maybe take a look
 
No way of testing the sensor off the bike. If have access to diagnostic tool then that will tell you where the fault is.

If need a sensor then see if THIS is for you.
 
The cable, as far as i know, didnt touch anything else.
How do i check the clearance between the sensor and ring, is it just the clearance checked with a feeler gauge? I assume Mr Haynes book of lies will have the correct clearance.
 
JoeC said:
No way of testing the sensor off the bike. If have access to diagnostic tool then that will tell you where the fault is.
Click to expand...

A diagnostic tool won't tell you much more than the bulb flashing are already doing....at best, it will say that there's a fault in a subsystem, but it won't say where or what is causing that fault.




Keep it simple.....the fault first showed up when a cable got wrapped around the wheel.....it would be sensible therefore to look for physical damage to a sensor, or whatever the sensor is, er, sensing :blast

Then you look at nearby associated systems like the microswitch etc etc.



Clever diagnostics can lead people up the garden path.......DAMHIK :rolleyes:
 
Big Fred said:
The cable, as far as i know, didnt touch anything else.
How do i check the clearance between the sensor and ring, is it just the clearance checked with a feeler gauge? I assume Mr Haynes book of lies will have the correct clearance.
Click to expand...

I think the tool kit on the bike even contains the required feeler gauge (or it did when the bike was new, anyway.)
 
Just had the wheel, caliper and sensor off. No damage to anything, air gap correct. Looks like a trip to Rainbow.
 
unplug the sensor and put multi - meter probes on the sensor side plugs two terminals put meter to ohms if it shows 0 ie open crcuit the sensor/cable is broken. :thumb
 
Update:
Just got back from having the fault diagnosed at Rainbow. It turns out that the Servo is fecked. Makes me think that this fault was not, after all, caused by the wire getting wrapped around the wheel. Just a coincidence.

£2000.00 fitted!:tears

Servoectomy then. I've seen plenty on here about the procedure, so that makes me feel easier about doing it.

Thanks to all who looked and posted.
 
Big Fred said:
Update:
Just got back from having the fault diagnosed at Rainbow. It turns out that the Servo is fecked. Makes me think that this fault was not, after all, caused by the wire getting wrapped around the wheel. Just a coincidence.

£2000.00 fitted!:tears

Servoectomy then. I've seen plenty on here about the procedure, so that makes me feel easier about doing it.

Thanks to all who looked and posted.
Click to expand...

Got a spare working servo if you want :nenau
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
You must log in or register to reply here.

Similar threads

Terry NW
ABS fault on gs1150 2004
Replies
8
Views
1,245
alanbmwgs
alanbmwgs
Rear brake and/or ABS fault?
Replies
19
Views
1,384
jacksdad63
ABS Fault
2
Replies
23
Views
3,456
Mistacat
Mistacat
  • Poll Poll
Poll - weights on rear wheel Y/N?
Replies
6
Views
1,401
NicD
Chipped paint on rear wheel
Replies
7
Views
1,928
littleade
littleade


Back
Top Bottom