K11 Owners Group

kstones · Posted: Fri Feb 05, 2016 2:19 pm Post subject: ABS won't reset

Been doing winter maintenance!.
I took off the swing arm for the spline lube and then removed the ABS unit, the battery and the alternator to check its drive rubbers. Also changed the fork oil. All directly or getting close to the ABS items both ends and middle. All back in place and done a couple of good test runs, but the ABS will not reset; got both lights on alternately. I did the test point earthing and holding down the switch procedure - many times; I got the LED lamp check done - said it was the front sensor, so I shorted out the female contacts of the connector under the tank - no luck. So maybe the sensor has gone duff; but this seems odd as it has not been disturbed; the rear one was off attached to the brake caliper but not damaged; checked it's cable connector near the tank and ok.
Sooo... any suggestions, tests, reset methods, sensor checking methods, what have you would be welcomed.
The abs has been apart in a big way to do the clutch, numerous spline lubes, fork maintenance etc and always come back on.
Hoping someone can assist with solving the riddle!
In hope, Tony.

Flying Duck · Posted: Fri Feb 05, 2016 3:55 pm Post subject:

ABS I or II?
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

SugarHillCTD · Posted: Fri Feb 05, 2016 3:59 pm Post subject:

I had a similar situation with my former '93 K-RS. I must have done the usual reset 20+ times with no change.

I temporarily "fixed" this by a piece of black tape over the flashing lights.

Several weeks later and after a fair bit of riding I happened to look at the gauges at an odd angle and noticed that the lights were no longer on.

The bike had fixed itself.

These BMW ABS systems must have some black magic in them somewhere.

I know it doesn't help you right now, but that was my experience.

Maybe you need an exorcist.
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Scott_Anderson · Posted: Fri Feb 05, 2016 7:16 pm Post subject:

If the code was for the front sensor, did you check the gap for the front sensor?
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

Flying Duck · Posted: Fri Feb 05, 2016 7:45 pm Post subject:

If you pulled anything on the front end then make sure the front sensor wire is routed properly. I once installed my front end so the sensor wire was rubbing against the tire. It rubbed though the wire's insulation and caused an ABS II front sensor fault. Solution was to replace the front sensor with one with a good wire. Then the system reset itself the next time it initialized.

What do you think shorting the sensor wires will accomplish? The ABS brain initialization testing looks for a pulse from the front end once the bike starts rolling.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Corkboy · Posted: Sat Feb 06, 2016 6:59 am Post subject:

kstones · Posted: Sat Feb 06, 2016 10:31 am Post subject:

Hi all;
Thanks for the feedback; further info requested;
it's a 1996 bike, 75000mls, ABS II; it has a multi plug awkward to refit but I refitted it and then took it off to see no pins bent etc; all ok; refitted it so the clip clicked into place.
Black tape! got plenty of it; time may tell; I went to an independent who tested it with the old led lamp set up as the "new" bike kit didn't function on this ABS.
There is no rubbing cable, the front wheel or calipers were not removed, no obvious damage from before or after the maintenance work. The front sensor gap was checked by me and the mechanic and it is correct 0.5 - 0.55mm. The rear one is small but it is the same as it has been the last 75000miles and no resetting prob before; I even tried moving the caliper on which the sensor is mounted out to make the 0.6 -.65 gap but this did not get a reset so I have left it as it has always been; and to move the rear or front sensors is no simple matter or them being on a bendy bit of metal - definitely not so they are solidly fixed.
The shorting out of the front sensor cable to the control unit was suggested by one of our US contributors who said it had worked for him.

So, question; has anyone heard of a sensor failing; has anyone heard of the ABS unit itself failing?? Finally any other suggestions?
Thanks for your assistance so far and any more will be most gratefully received.
Tony.

Flying Duck · Posted: Sat Feb 06, 2016 1:55 pm Post subject:

Yes, it is possible that the ABS II brain will fail. Although it is very unlikely that is the root cause of your issue.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

Corkboy · Posted: Sat Feb 06, 2016 2:57 pm Post subject:

Only other thing I can think of is a low battery - they are very sensitive to battery voltage. Is is a new/fully charged battery?

One suggestion, from this forum I think is to ride the bike, then when rolling, turn off the ignition and bump/rolling restart the bike. The abs will self check, without the draw from the starter motor.

Let us know how you get on - good luck.
_________________
'08 K1200GT
'87 K100RS 0140995 (Gone)
'97 K1100LT 0188024 (Gone)
'08 Transalp 700 (Gone)

grant93 · Posted: Sat Feb 06, 2016 4:41 pm Post subject:

Gidday,

Same thing happened to me with ABS11 fitted on a 1993 K1100, actually that was why the PO sold me the bike cheap as it had a few "electrical" issues with the brakes.. Even the bike shop gave up

Tried everything that was mentioned and suggested, so I brought a secondhand ABS11 unit cheap off ebay for $150.00, installed it myself and it has worked great ever since..
Look around for one to have has a spare anyway as they are not getting any cheaper.. Best of Luck
_________________
Cheers Grant

1994 K1100RS
1981 R100RS
1978 R100RS
1928 Chevrolet tourer

www.montythe1928chevrolet.blogspot.com.au

kstones · Posted: Sun Feb 07, 2016 2:31 pm Post subject:

Thanks for the suggestions. Off on hol by air (!) so will continue the saga in a couple of weeks.
Much obliged for your contributions.
tony.

atlantaboblutz@live.com · Posted: Thu Feb 11, 2016 6:35 pm Post subject:

I just had my ABS II rebuilt as I had tried everything. As it turns out, there is no way I could have repaired it myself. There were two specific faults on the controller board, one being a broken connection to ground requireing a circuit board fix. So there was a definite "brain" failure. When that was fixed, the tech saw a remaining a plunger failure code which I couldn't detect since only the last failure code (controller) was reported. So for the same rebuild price, they dug into my ABS pump and repaired it as well. Bottom line I had both a brain and mechanical failure.

The 5 year warranty on the rebuild provides a level of peace of mind.
http://modulemaster.com/rebuilds/shop/brakes/abs-modules/abs-fte-abs2/

As others have recommended, using a simple LED light, reading your codes first will be an important step. Count your blessings if it is a sensor failure. Easy and cheap fix.

But... if it is an actual ABS controller and/or pump failure, that is a different ball field. I seriously pondered eliminating ABS entirely and shedding the weight along with it. I've ridden a bunch of miles on non-ABS bikes. (I also rode a bicycle as a kid with no helmet - counted as child abuse in today's world ) But erred on the side of keeping the bike with all working components. Each as a right to decide what is best for them.

BTW, Attempting to avoid the $350 rebuild cost ... I bought a used ABS2 for an RS off of flea bay... was supposedly "perfect" with a video of the running bike before disassembly. It sure wasn't. Rearview mirror vision is always 20-20... either that or I'm a slow learner!
_________________
Thanks,
Bob
Atlanta GA

'94 K1100 LT
'76 R75/6

BMRBOY · Joined: 20 Sep 2016 Posts: 1

ok ..... so new to group .... reset abs !! how do you reset ABS lights
my dealer doesn't have the tool ...
Battery was failing, causing ABS lights to alternately flash

SOOOOOO.... how do you turn them off ???????

Flying Duck · Posted: Wed Sep 21, 2016 10:29 am Post subject:

Look about half way down on this page:

http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/abs/abs.htm
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

N41EF · Posted: Wed Sep 21, 2016 6:47 pm Post subject:

If it's an ABS 1 bike, my three wire plug is on the left side of the bike behind the battery cover. Try the procedure Duck sent you, of if all else fails let me know, I have a GS-911 I loan out.
_________________
2014 R1200RT Water Cooled
2001 R1100S Light
1993 K1100LT. Nissan Ice Blue.(Gone)

Inge K. · Posted: Fri Sep 23, 2016 4:44 am Post subject: Re: ABS RESET !?!?