ABS "Stuck Piston" Error (#16?) on 2002 R1200C

[Seth Diamond]

Hi everyone,

Seth here from Boston, MA, and I'm running into issues with my BMW R1200C with recurring ABS "railroad lights".

I ran the GS-911 (USB), and I think that the error that came up was #16 - "Stuck Piston". Glad I'm using a GS-911 as it's a lot more descriptive than the LED to ground test.

When I bought the bike 8 years ago, I brought it into a BMW dealer who (If my memory serves me correctly), that they encountered (and reset) the same error. The GS-911 got rid of the error for now, but I expect that it'll quickly come back as the problem isn't solved yet. I'm guessing that it's been due to my not (and the previous owner) not regularly bleeding the brakes. I'll be ordering speed bleeders shortly and will get into the habit of doing so.

However, before I do a full brake bleed and then the tank-off procedure and try to clean the two pistons (http://advwisdom.hogranch.com/Wisdom/BMW%20ABS%20II%20D&A.pdf) ...is there a way that I can quickly see if the GS-911 can try to first cycle the pistons to try and first unstick them (like running the "ABS Pressure Test" just to cycle the motor)? Also, do I have to be in the middle of bleeding the brakes when I do the piston cleaning procedure?

Thanks!

- Seth

[Alex Bongiovanni]

HELLO THERE IS A PROCEDURE FOR CLEANING, AS WELL AS THE FLUID EXCHANGE, THE LATEST MODELS, YOU HAVE THE OPTION "FORCE" THE PUMP TO MAKE A BLEEDING.

TO YOU BLEED THE RIGHT IS ONE BY ONE AND FOR REMOVING THE END WHERE ARE Allens breathers PUTTING A FUNNEL COMPLETE FLUID AND FINISH BLEEDING.

UNLIKE TRADITIONAL BRAKES, THIS YOURS IS NECESSARY A BLEEDING ORDER BECAUSE YOU MAKES THE CYLINDER Sangri MASTER TO THE PUMP AND PUMP UP THE CALIPER

https://youtu.be/a1ktxY_bgQY

https://youtu.be/YLM25NYvlas

Best regards,

Alex Bongiovanni

[Seth Diamond]

Hi everyone,

After all was said and done, the ABS on my 2002 R1200C threw the same code per GS-911...again "ABS - Stuck Piston", even after cleaning the two pistons (ABS-II), bleeding the brakes and clearing the fault. Plus, now the GS-911 doesn't seem to have an option for a "Bleed Test" - something that appeared to be there a few weeks ago! 

1) Was I mistaken that the GS-911 (USB) could cycle the ABS-II system between brake bleeds?

2) Is it time to remove the ABS module and have it serviced? Or is there something else I can try?

Many thanks!