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Discussion Starter #1
hello I am new today I have just bought my first bmw bike it is a 2001

k1200lt and the abs light are flashing back and forth

fluid levels seem ok will not reset with the pin 21 to earth

also done multi meter test on brown and blue wire just sits at 10 volts
no drops in voltage

how does the abs no if the fluid is low

what else can I check

thanks to all
 

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The bike has to roll to check the wheel sensors before they will go off. How is the battery? The abs needs a fully charged battery. Many posts on this question, use the search or technical section.
 

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Enjoy The Ride
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3,989 Posts
The 2001 LT's with the Brembo front caliper do not monitor the brake fluid level.
 

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The pattern and speed will tell you the fault. There is a chart out there that tells what they mean.
 

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They should be both flashing together at key on for normal operation and then go off after you start moving a few meters. If they are not both flashing together at key on, then there is a fault that needs to be cleared. If the pin 21 method did not reset it, what light or lights are flashing and how fast? As Saddleman said, the ABS-II with Brembo calipers has no fluid level sensors but if you are not in the USA, then an 01 might have the integral ABS system with BMW on the front calipers so please check and let us know. You may need access to a GS911 to read the code so can you fill in a little more of your profile so we know where you are and if there is anyone close that might be able to help out?
 
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Discussion Starter #7
thanks for all your reply's

when I turn the ignition on the lights flash one on one off back and fourth one second intervals stays the same all the time when riding fluid levels all ok pads all ok no leaks
I believe this abs system is none servo

been told off the dealer from frame number the bike was built in 1999 but registered in
2001 this my help

thankyou for your reply's
Dave
 

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You have the ABSII (ABS2) system. Mine failed the same way. We call that flashing sequence "Wig Wag" fault lights. I had to pull my pump out and send it to Module Masters in Idaho. $350 rebuild with a 5 year warranty. Before I did that, I put some tape over the fault lights and rode it for 2 years. ABSII faults don't stop the brakes from stopping the bike. They work just like normal only NO ABS function.

Bad part is.. basically BMW took an abs pump and module and built a bike around it. There are YouTube videos on disassembly and removal for rebuild. Good winter project. Good luck.
 

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Confirm you don't just have low battery voltage before you take it apart. I believe that gives same warning flashing.
 

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Discussion Starter #11
hi all just a update

rest abs unit using pin 21 this as turned the left light off but the right is still flashing at 1 hz

I cannot find anybody in the uk to repair this unit just any body no of any strip down videos or what normally

go's in the units

thanks dave
 

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Have you checked to make sure you don't have a problem with one of your wheel sensors. Are they both adjusted correctly.
 

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Discussion Starter #13
hi all
just had multi meter on the battery

ignition off 12.6 volts

ignition on 11.6 volts

engine running 14 volts
 

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hi all
just had multi meter on the battery

ignition off 12.6 volts

ignition on 11.6 volts

engine running 14 volts
I don't think you have confirmed what brake calipers you have yet. BMW or Brembo. In the UK, your 01 may have the I-ABS system. Brembo is ABS-II and BMW is I-ABS. please confirm.
 

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Wrencher Extraordinaire
2005 K1200LT
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hi all
just had multi meter on the battery

ignition off 12.6 volts

ignition on 11.6 volts

engine running 14 volts
OK your battery is the issue. Normal full charge open circuit voltage (key off) should be 12.74 for a full charged and healthy battery. The Key on voltage should be no lower than 12.5 with a drop to 11.5 during cranking. I say a weak battery is your issue. Recommend replacement and then perform the reset function again after you have had a few run cycles under your belt.
 

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Wrencher Extraordinaire
2005 K1200LT
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14,352 Posts
I run the PC-680 (about 100 on Amazon) on both my LT and my 09 GT. It is a good quality AGM type battery. I get about 6 years out of each one. Not sure if they are available over on your side of the pond.

Looks like it is available there after all .
 

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Before I took everything apart, I would completely flush the system using the procedure in the book. IT must be done in a systematic method.

Check this guys video:

 
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