Author Topic: ABS II. K1100RS.  (Read 288 times)

Offline Areshuan

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  • Posts: 10
ABS II. K1100RS.
« on: July 28, 2019, 01:58:51 AM »
SO i am still fixing my k11 that was sitting for 17 years.  Time for the ABS.
 Both lights flashing alternately.  Reset the ABS by grounding the pin from the diagnostic connector.
It worked.
Closed the main switch , Open it again  an both lights were flashing at the same time.  Road the bike above 5 mph . Both lights turned off. GREAT.
Tested the  ABS by braking the rear wheel . And it worked.  About 3 braking per second.
SO FAR SO GOOD.  I was happy
Rode it for 20 mins. 2 lights flashing alternately . No more ABS.
Reset ABS again. It would not reset.
Reset ABS again . 2 lights OFF.   after a while this time i have 2 lights on all the time.
I kept resetting the ABS unit. And i would have this kind of results.  Until i gave up. Thinking i would do an error analysis with  LED lamp.
This morning i turn on the bike  and....... Lights off  I have ABS working again without resetting. How did that happen?  I rode 150 miles with no problems . I stopped to refuel . Started the bike again  and the flashing lights are back
MY biggest concern is the erratic behavior of the lights  and that sometimes they are ON all the time.  I haven't found any information about that.
Thanks in advance for your comments .
  • Ecuador
  • 96 K1100RS
Killing time until time kills me
96 K1100RS
07 R1200GS
04 R1150GS

Offline Laitch

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Re: ABS II. K1100RS.
« Reply #1 on: July 28, 2019, 03:23:43 AM »
A weak battery will cause repeated intermittent failure warnings. Regardless of whether it is new or not, what is the battery's resting voltage?
Have you consulted Tosi's website?
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303
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Offline Scott_

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Re: ABS II. K1100RS.
« Reply #2 on: July 28, 2019, 06:50:04 AM »
+1 for suspecting the battery.
The ABS systems are sensitive to a week battery when cranking the bike.
  • My Garage
Ride safe.


1997 K1100LT 0302488
1995 K1100LT 0302044
Garmin StreetPilot 2820
Garmin Zumo 550
"One who does not ask questions is ashamed to learn" Danish proverb
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Offline Areshuan

  • Motobrick Curious
  • Posts: 10
Re: ABS II. K1100RS.
« Reply #3 on: July 30, 2019, 11:46:59 AM »
I've read about the low voltage problems on ABS ii.  The thing is that i crank up the bike and sometimes the ABS works perfectly no errors. In the middle of the ride they start to flash alternatively or both on .
I will still try a new battery just in case.

The battery voltage at rest is 12.8 v.
  • Ecuador
  • 96 K1100RS
Killing time until time kills me
96 K1100RS
07 R1200GS
04 R1150GS

Offline Areshuan

  • Motobrick Curious
  • Posts: 10
Re: ABS II. K1100RS.
« Reply #4 on: August 05, 2019, 04:49:27 PM »
Dear Laitch and Scott_  Thank you for your responses . You were right it was a low voltage issue when  you crank the bike.   Now i have ABS  all the time with no issues.  I didn't replace my battery for a new one , but include a super capacitors bank . Something i had planned before. It works beautifully. So i am sharing with you this.
As you can see The battery + the capacitors keep  collage above 12.8 dropping to 12.0 at cranking just for less than a second. Capacitors deliver all their voltage at once and they recover it very fast.
My next fix will be to change the lead acid battery for a lithium battery ( plus capacitors) .
I will safe 13 or 15 pounds.
Thanks so much for replying
 
  • Ecuador
  • 96 K1100RS
Killing time until time kills me
96 K1100RS
07 R1200GS
04 R1150GS

Offline Laitch

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  • Posts: 6737
Re: ABS II. K1100RS.
« Reply #5 on: August 05, 2019, 07:44:58 PM »
Now i have ABS  all the time with no issues.  I didn't replace my battery for a new one , but include a super capacitors bank . Something i had planned before. It works beautifully. So i am sharing with you this.
Please go into more detail. I'm certain others would like to try this solution. Keep us updated on how it works in the long run, too.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline Rastrai

  • Motobrick Curious
  • Posts: 10
Re: ABS II. K1100RS.
« Reply #6 on: August 18, 2019, 07:01:12 PM »
Please go into more detail. I'm certain others would like to try this solution. Keep us updated on how it works in the long run, too.
Yes please! What size capacitors? What kind of pcb did u use?
  • Chico, ca
  • 96 k1100

Offline mlytle

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  • Posts: 1039
Re: ABS II. K1100RS.
« Reply #7 on: August 18, 2019, 08:44:06 PM »
given the fact the bikes came from the factory with functioning ABS that worked with a lead acid battery with no problems, the capacitor addition is a crutch that is hiding the real problem.  capacitors should NOT be needed for a functioning ABS.  ABS works just fine on the K1100RS in my garage with no capacitors.   that fact that is is working in this case shows there is still a bad battery, or more likely one or many dirty connections in the system that are causing a large voltage drop.

problem not solved....keep digging for why the voltage drop is there.  when found, delete the extra capacitor thing....
  • alexandria, va
  • 92 K75s, 94 K75s, 96 K1100RS SE (custodian), 09 K1300s
Marshall
Project Thread "K75s Midlife Refresh"
http://www.motobrick.com/index.php/topic,7810.0.html

Offline Areshuan

  • Motobrick Curious
  • Posts: 10
Re: ABS II. K1100RS.
« Reply #8 on: August 18, 2019, 09:21:46 PM »
The super capacitors are the Maxwell BCAP0350E270T13.  They are 2.7V 350F.  That means if you use 6 of them  you will have a maximum capacity of  16.2 V.  But will only get the output capacity of your alternator.  In my case 14 volts.

I bought  a little board  from eBay. Very straight forward instructions. There are better ones out there that will prolong the life of the capacitors.  But i just wanted to test them . Besides this ones can be recharge 1 million times.
https://www.ebay.com/itm/1Ultracapacitor-Module-KIT-Battery-Eliminator-Car-Audio-parts-No-Capacitors/302040184049?hash=item4652ff74f1:g:NtQAAOSwXeJXdA2x:sc:ShippingMethodStandard!33180!US!-1

You can also find this pack already welded.  ( i don't know that seller)
https://www.ebay.com/itm/ULTRACAPACITOR-MODULE-INTRONICS-POWER-UCAP16-58-MADE-in-USA/262507555210?hash=item3d1eab698a:g:iFgAAOSwu-BWOSO-

mlytle   I bought this bike recently. It has been stored for 17 years.  I just put an used battery that of course might have some issues . In my list to buy i wanted a new Lithium battery but  i could not  find the right one because of the tight space of the k11rs.
I then tried to make it run on the capacitors alone but it is not practical since they can not hold that much charge.  So i instal temporary my used battery with the capacitors.

In the future i am going to use a Hybrid system of lithium batteries and ultra capacitors.  I would safe lots of weight and the life expectancy  of the packs  might be many years.
  • Ecuador
  • 96 K1100RS
Killing time until time kills me
96 K1100RS
07 R1200GS
04 R1150GS

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