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Discussion Starter · #1 ·
My 2008 K1200GT turned on the Brake Failure light, constant on during my first ride of the season. I have seen lots of posts with the codes from a GS911, that confirm this is the pump motor brushes.

I am using an OBDLink MX with Motoscan and get codes 5DF0 and 5DF1, both say "Pump motor: Voltage Supply". I have been able to actuate the pump motor a few times, but it is very intermittent.

Can anybody confirm if the 5DF0 and 5DF1 codes are also brush failure?
Module Master lists the codes like this>
Code 24048 (5DF0)
Code 24049 (5DF1)
 

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Discussion Starter · #3 ·
Thanks for the reply botus, yes I've got the fairing off already. I'm surprised at how bulky the unit is for a motorcycle, almost identical unit as many cars including BMW.

Ive watched all the videos on self repair, which I plan to do as well. Will report back how it goes.
 

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Discussion Starter · #5 · (Edited)
I completed the repair on this a few days ago, had to wait 5 days for a new SKF bearing to show up :)
All that was needed was to scrape down the brushes a little bit, it was obvious that the brush housing was squeezed just a few mils to tight. A little scraping with pocket knife and they slide in and out perfectly.

https://www.k-bikes.com/forums/attachment.php?attachmentid=24543&thumb=1
Cleared the 5DF0 and 5DF1 codes with Motoscan, and tested motor actuation. Working perfectly. Bled the brakes, and road tested, ABS is working great again!

One thing that is strange though, is every time I turn the bike on, the panel shows "Brake Failure" until I drive off. Then warning goes out. I have read codes and none are stored. What does this mean? is there something else that needs to be reset?
 

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Discussion Starter · #7 ·
I thought the "Brake Failure" light was coming on solid, but checked it again and it is only flashing. You are correct, it is normal for the light to flash until you start driving.
 

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Discussion Starter · #9 ·
Dwsdad, you will need to read codes to find out for sure what’s going on. In my case, brakes felt totally normal, no loss is stopping power. ABS however, was non-functional.
 

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Discussion Starter · #10 ·
2 years later, an update: got the same ABS failure and 5DF0 and 5DF1, "Pump motor: Voltage Supply” codes. Pulled the pump motor (easy now because it is just screwed on) and found brushes stuck again. Turns out shaving wasn’t quite the right fix. It seems the rear of the brush is what is sticking. I was able to stick a screwdriver in the braid slot and pry the housing open slightly. Moving good again, installed and pump runs great. Hopefully get more than 2 years this time!
 

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Discussion Starter · #11 · (Edited)
Another year and problem came back. This time i found a replacement! A 2014 Ford Focus uses an identical looking ABS module, I bought used one on eBay for $45. On comparing them, the motors are identical EXCEPT the armature with the eccentric has MORE deflection on the eccentric shaft that sticks out. So, I used my original motor armature and put it in the Ford Focus motor housing, and it is working great! Permanent fix this time i hope.
Product Font Wood Auto part Machine


This photo is just to show how the corners of the motor are clamped with screws into the ABS housing, this is the original BMW motor:
Computer hardware Electronic device Electric blue Font Cable
 
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