ABS modulator problem on 02 K1200RS - K-Bikes.com - Excellence in Motion
 
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post #1 of 10 (permalink) Old May 11th, 2008, 10:19 am Thread Starter
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ABS modulator problem on 02 K1200RS

I came up with a problem today and am searching for an answer--

My ABS lights started flashing and I tried shutting things down to reset but it didn't work-- Then when I shut the bike down, the ABS modulator kept on running and only shut down when I disconnected the battery. If I reconnect the battery, the pump starts running again-- without the key in the ignition. I have pulled all the relays and fuses to no avail-- the pump runs as long as the battery is hooked up--

I tried a search on the site but didn't find anything. I'm sure I'm not the first to experience this problem and hope someone can read this post and give some advice-- Thanks in advance

ArizonaAl
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post #2 of 10 (permalink) Old May 11th, 2008, 1:40 pm
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Abs

AA,
Have the dealer hook it up to their diagnostic machine and it will tell you exactly what it is so you can then take appropriate measures. Don't play around with the ABS, it's too much of a "Safety" issue.
BTW- Since you disconnected the battery, don't forget to re-set your fuel delivery. Kill switch on, key on, (DO NOT START THE BIKE) roll the throttle full open three times then turn the key off. You're now re-set.

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post #3 of 10 (permalink) Old May 11th, 2008, 2:53 pm
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If it's the model with ABSII, it sounds like the relay, which is built in to the modulator unit, has stuck for some reason.
Try tapping the cover on the back of the unit.
If I could figure out how to post sections from the manual, to assist with the description, I would!

Douglas C.
1998 K1200RS
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post #4 of 10 (permalink) Old May 11th, 2008, 3:52 pm
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ABS Behavior

Your bike has I-ABS. While a constant running pump can signify an internal problem, it is more common to have a sticking brake switch or master cylinder make the control unit "think" you are applying the brakes. Take a look at the switches and check for a sluggish master cylinder.
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post #5 of 10 (permalink) Old May 11th, 2008, 6:20 pm Thread Starter
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All switches are functional, and they operate the brakes when activated-- but the unit itself cannot be shut down without disconnecting the battery. These pumps were never made for continuous service, so no telling how long it will last till complete failure.
It is as though the brains of the unit are not functioning properly, so I have grave concerns about the circuitry in the modulator itself.
Thus far no dealers have been able to shed any light on the problem-- maybe once more are available on Tuesday, I will be able to find something to work on.
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post #6 of 10 (permalink) Old May 12th, 2008, 1:13 pm
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Tell me why..

Quote:
Originally Posted by cobbler
BTW- Since you disconnected the battery, don't forget to re-set your fuel delivery. Kill switch on, key on, (DO NOT START THE BIKE) roll the throttle full open three times then turn the key off. You're now re-set.
I guess I haven't been paying attention. Why does this need to be done when the battery is disconnected? I replaced my battery this past Saturday, reset my clock and rode off on a short ride. Everything appeared normal. What is accomplished by this resetting of the fuel delivery?

Marc
Prescott AZ
2008 K1200S
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post #7 of 10 (permalink) Old May 12th, 2008, 4:21 pm
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Quote:
Originally Posted by mkrouse
I guess I haven't been paying attention. Why does this need to be done when the battery is disconnected? I replaced my battery this past Saturday, reset my clock and rode off on a short ride. Everything appeared normal. What is accomplished by this resetting of the fuel delivery?
If everything was indeed normal, you were fortunate. Actually, it's called a TPS (throttle position sensor) reset. Normally, after a battery disconnect, your bike may "forget" its throttle positioning...you may notice it idling high, low or rough. Doing the reset aligns your throttle response with the beginning and end points of your cable travel. Even the dealer forgets to do this sometimes.

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post #8 of 10 (permalink) Old May 12th, 2008, 6:58 pm
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Quote:
Originally Posted by ArizonaAl
I came up with a problem today and am searching for an answer--

My ABS lights started flashing and I tried shutting things down to reset but it didn't work-- Then when I shut the bike down, the ABS modulator kept on running and only shut down when I disconnected the battery. If I reconnect the battery, the pump starts running again-- without the key in the ignition. I have pulled all the relays and fuses to no avail-- the pump runs as long as the battery is hooked up--

I tried a search on the site but didn't find anything. I'm sure I'm not the first to experience this problem and hope someone can read this post and give some advice-- Thanks in advance

ArizonaAl
The ABS modulator has a relay fixed on the end for the heavy duty pump solenoid. The relay is wired straight to the battery with no fuses, just like the starter relay.

Either the relay has stuck/welded contacts, or the ABS computer driving it is sending the wrong signals.



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post #9 of 10 (permalink) Old May 12th, 2008, 7:34 pm Thread Starter
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Quote:
Originally Posted by voxmagna
The ABS modulator has a relay fixed on the end for the heavy duty pump solenoid. The relay is wired straight to the battery with no fuses, just like the starter relay.

Either the relay has stuck/welded contacts, or the ABS computer driving it is sending the wrong signals.
This is true for the older models but the newer ones with the EVO brakes no longer have the relay on the ABS unit, it all is circuitry---
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post #10 of 10 (permalink) Old Jun 17th, 2008, 11:13 am
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me too

I just had the exact same problem this morning. Turned ignition on and servo locked up. Turned off ignition and it kept going. Had to disconnect battery to disengage.

I hooked the battery back up, and when I turned the ignition back on, the same thing happened again. Did you or a dealer identify the problem?

2004 K1200GT
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