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Good morning from the UK.
I've just had the new airbox and idle control valve on my early 2006 K12gt. This has solved my idle issues and it accelerates and decelerate like a dream.
Unfortunately I have the dreaded flashing brake failure light and according to my local bmw garage the fault code points to the abs module. A £1500 part in the uk. I still have the servo assist to the front brake but no assist to the rear brake (not that I use the rear brake much.) If keep switching power on and off every now and again I get the assist back but not for long. Could this be anything else other than the abs module?
If it is the abs module there is a local garage that are bmw specialists that say they can bypass the abs and remove the servos. Apparently a well known work around and generally a big improvement to the electric servo assist abs system. Is this the way forward?

Long post I know but don't want to spend £2000 on a abs module when I'm saving for 3 weeks in the USA next year.
 

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It is the abs module, mine went the first trip way back in 2006 just like yours, I would have power then no power then power again. Very unnerving.
Glad to see your 2006 is still up and running great. Lost mine last year to an accident. Got a 2008GT now. Still smiling.
Good luck.
Kevin
 

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Before you rip the ABS out completely, I'd read this thread, and contact Module Master to see if they can help you. Looks like they're working on a solution for the iABS modules for the '06GT and other bikes.
 

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Good morning from the UK.
I've just had the new airbox and idle control valve on my early 2006 K12gt. This has solved my idle issues and it accelerates and decelerate like a dream.
Unfortunately I have the dreaded flashing brake failure light and according to my local bmw garage the fault code points to the abs module. A £1500 part in the uk. I still have the servo assist to the front brake but no assist to the rear brake (not that I use the rear brake much.) If keep switching power on and off every now and again I get the assist back but not for long. Could this be anything else other than the abs module?
If it is the abs module there is a local garage that are bmw specialists that say they can bypass the abs and remove the servos. Apparently, a well-known workaround and generally a big improvement to the electric servo assist abs system. Is this the way forward?

Long post I know but don't want to spend £2000 on an abs module when I'm saving for 3 weeks in the USA next year.
Hi everyone! This is an old post but still very much updated so I'll resurrect it.

I had exactly this same problem in the same model (06 K12GT) - all symptoms. I've decided to grab the "bull by the horns" and repair the ABS module myself (using the info available on the net). I have open the module and found nothing wrong with it: motors were both completely clean, brushes were new (both motors worked when 12v were applied directly), no signals of burned elements on the board. I had the fortune to come across a used module (don't know its condition though) and decided to use it to replace both pressure sensors and solenoid for the rear circuit. Reassembled it all but the problem persists; I purged the system according to the recommended procedure but can't bleed the rear wheel high-pressure system (from servo to wheel) as the motor does not run. I have done the procedure twice and on the second time I used a vacuum pump to bleed the high-pressure system but the problem persists:
  • red triangle on
  • abs failure light blinking @4Hz
  • no servo assistance on the rear wheel
  • servo is working on the front wheel

I don't have any hardware to connect to the ECU of the bike, so I can't read the codes and I have run out of ideas to proceed. Maybe you have experienced this as well and can throw a hint... I would say there is a failed sensor somewhere but where?...

One other question for those who have rebuilt the Servo/ABS unit: does the bike need to be connected to a computer to do something to complete the bleeding procedure? From the videos I found o the net, no but....

Thanks!
 

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2009 K1300S, 2017 S1000R
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To get the conversation started my only suggestion is have it rebuilt by the pros. this company in Germany will rebuild it for about 800$ us. Or you could by pass it with one of their kits that keeps the electronics you need.
 
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