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Discussion Starter #1
The bike is just like new minus this pump on. The only way for me to stop the pump is to remove the battery cable. The brake failure light flashes very fast. I have all the service manuals and have removed the tank to get at the Abs relay. The manuals show a picture of a pump that dose not look like my pump. I have been told there is a relay in the pump but I can't find one. Were there a few different pumps used in 2002? Also the brake light are not on when the pump is running. When you depress the the brake the pump get louder. Please Help!!!!!!!!!!!!!!!!!!!!!
 

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Wrencher Extraordinaire
2005 K1200LT
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14,412 Posts
Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

There is no ABS relay and it sounds like it has a bad ABS unit. Two things trigger the pumps. 1. brake switches -lever and pedal. 2. pressure. What we need to do is isolate the switches since they will prevent the unit from completeing its self test when the key is turned on.

The bike will not complete the self test if brakes are held during the initial key on period. If one of the switches is stuck it will remain in the fast flash mode until switch is released.

Check each switch with the bike turned off and in a quiet location. You should be able to hear a distinc click as the lever is slowly pulled in. If you are getting that click then that switch is most likely OK. Next look at the brake pedal and what looks like an adjusting nut. There is a paddle just above the head of that bolt. As you depress the pedal that paddel drops and you should hear a distinc click.

Once you get those in order try the key on again with no brakes applied and see if it complets the rapid flash selft test and switches to the slow flash. The slow flash means half the test is done and the second part is completed after a short rolling distance to check ABS wheel sensors. If all is well the flashing will stop.

Also it bothers me that the servos run even with the key off. That almost sounds like an early ABS II unit failure mode. Just to make sure what letters are on the front calipers, BMW or Brembo?
 

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Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

Would the brake lights come (stay) on? Or a they triggered through the ABS unit?
 

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Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

Have you checked the fluid levels and bled the front and rear circuits? A complete flush may help also.
 

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Discussion Starter #5
Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

I have checked both switches. I think they are working right. The bike has the Bmw on the calipers. If this tells you what Abs system I have. The bike may have been jump started by the old owner. The bike starts and runs but , the Abs pump runs. If you press the brake the pump gets louder. The only way to shut the pump off is on hook the battery. Fluid levels are good. Thanks for the help.
 

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Wrencher Extraordinaire
2005 K1200LT
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14,412 Posts
Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

There is something seriously wrong if the servos are running with the key off. That is a new failure mode I have not seen here before. Need to have the dealer put it on the computer and read out any fault codes. Or find some one nearby with a GS-911 unit, check the stickey at the top of the "Bike Talk" forum for a list of GS-911 owners.
 

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Re: My Father purchased 2002 K1200LT with 7000 miles the abs pump stays on all the time

check the kill switch..make sure it is dead center..I read where the abs pump will run in the kill position..or maybe you have a short there..good luck. Cheers!
 
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