R1150R - Abs problem

Discussion in 'Road Warriors' started by Lewis, Jul 6, 2010.

  1. Lewis

    Lewis n00b

    Joined:
    Oct 17, 2009
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    9
    hello all,

    i dunno if I'm posting to the right forum, if no, maybe a mod should move my message to the appropriate forum..

    i own a '04 R1150R but i have a problem with integral ABS.

    when i press the front brake the red light lights continuously and the ABS light is blinking. after this, i have no servo assist in rear brakes.
    this happens during first brake press during summer and after 10-15 times during winder.

    somebody told me that its the ABS unit (which costs 2200 euros + human workhours), someone else that its the battery, someone told me that my bike has 4 fluid circuits for brakes and i have to bleed all of them..

    my question is, had anyone else this problem ?
    how to start debugging in order to find whats happening ?


    regards,
    George
    #1
  2. Lost Roadie

    Lost Roadie Rider

    Joined:
    Oct 15, 2006
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    Living on the Road and occasional Trail
    Welcome to ADV!
    I think you're in the right forum on this site, but you might want to check out this BMW R bike specific forum.


    www.r1150r.org





    cheers!
    #2
  3. Lewis

    Lewis n00b

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    i already posted there, but no answer :(
    #3
  4. JimVonBaden

    JimVonBaden "Cool" Aid!

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    Lewis,

    Before you jump into a very expensive fix, there are a few things to look at. First, have you ever had the fluid flushed? If not, you might want to look at doing that first. It is a bit complicated, but very doable. Check the wisdom link at the bottom of the page.

    Also, yes, occasionally a weak battery can cause this. Does it happen on the first part of a ride, but not after that?

    Jim :brow
    #4
  5. Lewis

    Lewis n00b

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    now, it happens EVERY time i press the brake.
    i have to stop, turn off, ignite again, and go.. till the next time i press the brake..
    #5
  6. jsb223

    jsb223 ADV Rookie

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    Check

    sufficient voltage while starting

    tail light bulb

    front brake switch

    rear brake switch
    #6
  7. TX Ryder

    TX Ryder Been here awhile

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    North East Texas
    #7
  8. JimVonBaden

    JimVonBaden "Cool" Aid!

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    Sounds a lot like low fluid level in the ABS unit, though it could be your brake switch in the handle. Does your brake light work normally?

    Jim :brow
    #8
  9. TX Ryder

    TX Ryder Been here awhile

    Joined:
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    Location:
    North East Texas
    Disclaimer: I'm no BMW mechanic (I've owned 4 and had my own ABS issues), just a competent DIY wrench. And there's a good deal of online tech info to use as reference.

    Your description matches one of these two fault codes,

    Gen ON, ABS flashes at 1 Hz = At least one brake circuit without ABS.
    Gen ON, ABS flashes at 4Hz =At least one brake circuit in residual braking function mode.

    depending on the frequency of the ABS flashing light.

    Here's a few leads to read that might apply to your problem:

    http://www.bmwmoa.org/forum/showthread.php?t=36543&highlight=iABS

    http://www.bmwmoa.org/forum/showthread.php?t=31013&highlight=iABS
    #9
  10. Lewis

    Lewis n00b

    Joined:
    Oct 17, 2009
    Oddometer:
    9
    hello all,

    after a short ride, i noticed that :
    when i press the front brake, clicks..
    when i press the rear brake, clicks also..
    the back stop light works fine..

    i made a video, uploaded it in youtube to let you see the blinking lights after the problem occurs..
    please take a look...

    http://www.youtube.com/watch?v=-t3IL56PVgk

    rgds,

    George
    #10
  11. mykill

    mykill odd

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    Are your ABS sensors clean? Mud or gunk might be interfering with the signal from the wheel. There should also be a testing procedure.
    #11
  12. Lewis

    Lewis n00b

    Joined:
    Oct 17, 2009
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    9
    next week, after i collect all opinions, i will try to bleed all abs/brake circuits and check everything..

    but for sure it has to do with the external temperature... when its hot, it happens in 1st-2nd brake press.. when its relatively cold, it happens after 20-30 brake presses..
    #12