Help please--Dreaded ABS Failure

Discussion in 'GS Boxers' started by dwf, Nov 1, 2012.

  1. EdCG

    EdCG Just Some Guy

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    I have the same failure on my 2007 GSA. For the time being I'm simply riding without ABS.... no additional harm will come to any systems riding without the functionality (assuming that this rider doesn't do something silly). I plan to send my unit in to Module Masters as well.... When I initially talked to them about 6 weeks ago they quoted me $350 to service mine... It sounds like they may have dropped their price.
    #21
  2. the-oz-slider

    the-oz-slider The Oz Slider

    Joined:
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    Canada
    I have been down this road [hahaha] for 18 months now, exacerbated by the last dealer who worked on the bike [in Pennsylvania] doing some work on corroded wiring into the ABS module, leaving me with both ABS malfunctions and poorly repaired wiring....
    I have been riding the bike without ABS for that time and it has been fine...in some respects I prefer it without ABS but a spin on my sons 1100S quickly convinces me I should get it fixed....so its off to Modulemaster this week.

    Our GS911 said that the fault was "motor voltage insufficient" or something like that.....

    To remove the ABS unit is quite simple, as follows.
    1. Remove tank and all the bits and pieces associated with that.
    2. Find the big electrical plug on the left hand side, lift the anchor clip to free the plug and slowly ease the plug back. Move it out of the way.
    3. Undo the brake lines from the abs module and have a piece of hose available which is suitable to jam over the brake line ends and hook two lines up to each other to stop fluid leaking. Bend the lines slightly and carefully to the right to get them out of the way.
    4. Undo the bolts that hold the module bracket onto the bike, one located down each side of the module.These use those stupid star headed bolts. Replace them with stainless socket screws when you replace the unit.
    5. Remove the little round gadget on the left hand side that is clipped into a bracket on the abs bracket [dont know what it is....].
    6. Carefully lift the entire unit up and awaaaayyyy.......
    8. If you are concerned about oil leaking out the brake lines then place a container under them but I left the two pieces of hose in place and wrapped them with a big rag, and then added a container later for good measure....
    7. Dont send Modulemaster the bracket, just the complete unit.

    I actually dismantled my unit and the motor indeed would not rotate smoothly, which is exactly what the problem is apparently, with the brushes in the motor breaking down.

    I have been a BMW rider/owner/racer for more years than I care to count, and this poor product [the ABS] and the substandard wiring quality [the wire diameter is miniscule and easily damaged] almost caused me to dump this bike and never ride a BMW again. Im still not happy with the ABS problems, and its made worse by the fact that BMW knows there is a problem [Modulemaster has made a very good business out of fixing ABS units] just like the rear end failures [there I go again...I promised myself I wouldn't mention it:puke1]but Im at a point in my life where I will keep at it and make do........
    Oh and as I get older and weaker, an Orange bike with all the weight up high, just doesn't seem like its a good fit for me.....
    Good luck with your ABS problem resolution........
    Al
    #22
  3. Beemerlover

    Beemerlover Been here awhile

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    +1 on that Bro. Same for me.

    No doubt the fanboyz & apologists will chime in bigtime, but facts are facts.

    AFAIK, these are the only bikes anywhere that have their own guy who makes a living by selling a module to identify and hopefully troubleshoot the problems that are always cropping up (GS 911).
    #23
  4. jrlakin

    jrlakin Adventurer

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    Sep 15, 2008
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    I can't speak to removal of an ABS unit on an 07 or newer GS, but my friend and I removed and replaced one of the Servo units on an 05 GS. It really wasn't all that hard to do. My O5 unit went out and I was able to buy a used unit from the internet.
    #24
  5. JimVonBaden

    JimVonBaden "Cool" Aid!

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    You might want to change your name to BeemerHater!:deal

    Jim :brow
    #25
  6. Callisto224

    Callisto224 Long timer

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    +1 :lol3
    #26
  7. FLARider1

    FLARider1 Long timer

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    regarding above quote - When I lost mine last year I not only lost ABS I lost the odometer, speedometer and brake light stayed on all the time!!!!!!! Did you experience the same?

    I lost mine on the way to Key West for start of Key West to Prudhoe Bay and back to Key West.......so I was very fortunate that the dealer had the module in stock and worked the bike right away. I live in Homestead I just rode it home and then to the shop. The dealer had it back to me the day before I actually left to head to AK. I had no time to do a rebuild or anything such as that.......hell, didn't even really find out they were an issue until I got back from the trip.......

    Good luck with your repairs!!
    #27
  8. JimVonBaden

    JimVonBaden "Cool" Aid!

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    So changing the module fixed your odometer and speedometer?

    Sorry, I don't get that at all. They are not related. The usual fix for that is a rear speed sensor. This is often caused by crud on the sensor, or a damaged sensor.

    Jim :brow
    #28
  9. AviatorTroy

    AviatorTroy Long timer

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    Yea don't sweat it bro. Come on in, the water is warm and the kool aid tastes great!
    #29
  10. FLARider1

    FLARider1 Long timer

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    Not really sure how they tied all that together. They said there was a fault code caused by the module failure that took all the other stuff out. The code that was there actually made it difficult to analyze the problem down to the module. I honestly don't recall all the details because I was so pissed that it happened!!! Only thing replaced, that they put on the invoice, was the module and all problems went away. Didn't phase me as to the cause, I was happy to get the bike on the road and not delay/cancel my trip. Like I said, I didn't really find all the info on the module issues to much later!! They might have cleaned a sensor and got the other issues fixed by that and not say anything. I did have the ABS Failure light once the module went. Thats actually how I noticed the issue because it didnt shut off once the bike was rolling.
    #30
  11. bemiiten

    bemiiten League of Adventures

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    I see a big problem riding a bike with linked brakes when the ABS is not working. If you brake with the front hard enough to break the rear loose, You can't get control of the back wheel without letting up on the brakes, you may not have the option to do so. :deal
    #31
  12. MJS

    MJS Long timer

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    On the servo bikes (and likely the later ones also), the ABS module is responsible for transmitting the speed sensor signal onto the data bus. If you look at the wiring diagram you'll see the speed sensors are connected to the ABS module. Only connection between the ABS unit and the Kombi and ZFE is the data bus.
    #32
    cnj3 likes this.
  13. JimVonBaden

    JimVonBaden "Cool" Aid!

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    Interesting that the servo unit can be removed and you still have speedo and odometer then.

    Jim :brow
    #33
  14. Wallowa

    Wallowa Long timer

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    What you describe happens often where I ride..since I ride almost 100% dirt, a lot is down hill with weight forward and rear light...you still need the front brake and learn to feather in the rear as you apply the front...no big deal, just a touch you learn...remember the linked brakes, which I love, are 70% front and 30% rear when you apply only the front brake [which I always cover while riding], but you can feed in more rear sooner to keep it planted. ABS can be a life saver on pavement...but many of us rode bikes before ABS and learned to ride and stop without it...admittedly sometimes fear and inexperience could result in bad things happening when panic braking...but the front usually was tucked under and ther rear was not the biggest problem..

    Just my experience...
    #34
  15. MJS

    MJS Long timer

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    On my 05 I had to reroute the rear speed sensor wires to the ZFE and have the bike reprogrammed.

    I think some others have piped around the servo but left the servo module in place. As long as the servo is still connected and doesn't have an electronic fault in it's processor (unlikely IMO) the speedo would still work. Not really sure about the newer non-servo bikes though.
    #35
  16. Clayton Bigsby

    Clayton Bigsby Ready

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    On my 2006, this error was caused by a sticking brake switch behind the front brake lever. A quick shot of wd40 fixed the problem. Whew.
    #36
  17. Hawaiidc

    Hawaiidc n00b

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    I too think I have this problem. Just bought 07 GS with 28k and the brake failure light is on constantly and it never flashes. Took it in the dirt and no abs when I locked up the brakes. Can't seem to get any results when using abs button and I have not checked wiring. Could abs sensor in wheels shut down whole system?

    My question is: how do I tell which abs system I have? I ask this because there is a video on how to repair the abs motor. Doesn't look too bad.

    Also if the motor works will a brake flush/bleed be easy or will I need a vac pump/syringe? I have bled brakes before,just not abs.

    Thanks

    Sent from my XT1080 using Tapatalk
    #37
  18. gwally99

    gwally99 Adventurer

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    For what it's worth, when my 07 GS ABS unit went bad, Module Masters repaired my unit for a few hundred dollars compared to $2K+ from BMW. Would use them again but hope never have to.
    #38
  19. Swinefahrt

    Swinefahrt RooteR

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    Your '07 doesn't have servos.
    #39
  20. Hawaiidc

    Hawaiidc n00b

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    Thanks Swinefhart. I may be attempting the motor repair in the near future.

    Sent from my XT1080 using Tapatalk
    #40