ABS blinking constantly - 2000 K 1200LT - BMW Luxury Touring Community
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post #1 of 18 Old Jun 23rd, 2016, 10:08 pm Thread Starter
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ABS blinking constantly - 2000 K 1200LT

hi guys,

any idea why the abs witnesses in the dashboard blink non-stop one after the other, not at the same time.

thank you!

Jose
Puebla, Mexico

02/2000 BMW K1200 LT (Canyon Red)
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post #2 of 18 Old Jun 23rd, 2016, 11:09 pm
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by Barkaino View Post
hi guys,

any idea why the abs witnesses in the dashboard blink non-stop one after the other, not at the same time.

thank you!
Either there is a fault in the system OR, the speed sensors either front or rear are not sending. The bike has to sense both wheels rolling some number of feet before it shuts off the wig-wag lights. Luckily, it is a 2000 year ABS-II and the brakes do not go away like on the 2002 and up I-ABS.

A GS911 would be helpful to determine the fault.

Gordon
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
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post #3 of 18 Old Jun 24th, 2016, 9:34 am Thread Starter
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by bmwcoolk1200 View Post
Either there is a fault in the system OR, the speed sensors either front or rear are not sending. The bike has to sense both wheels rolling some number of feet before it shuts off the wig-wag lights. Luckily, it is a 2000 year ABS-II and the brakes do not go away like on the 2002 and up I-ABS.

A GS911 would be helpful to determine the fault.
hopefully its that we havent moved it more than a couple of feet at the time and not a faulty sensor.

thank for the help

Jose
Puebla, Mexico

02/2000 BMW K1200 LT (Canyon Red)
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post #4 of 18 Old Jun 24th, 2016, 10:07 am
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by Barkaino View Post
hopefully its that we havent moved it more than a couple of feet at the time and not a faulty sensor.

thank for the help
The wig-wag lights are normal at start and there is a sensor check with forward motion of the bike to make sure it can sense both wheels moving before it shuts off the lights. It should clear within some 10 to 15 feet as you start out in first. If it doesn't clear, then there is a fault, either one of the sensors is not detecting movement or an ABS unit fault where the GS911 will help to isolate the exact failure.

Hope it is normal operation and the lights clear once you get moving.

Gordon
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #5 of 18 Old Jun 24th, 2016, 10:12 am
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Re: ABS blinking constantly - 2000 K 1200LT

If the two lights are alternating when you turn the bike on, you have an ABS fault (which may be as simple as low fluid, or as complex as a failed ABS pump $$$$$). Do a search for "Pin 21" and you will find plenty of threads with things you can try to eliminate the problem. Some expensive, some labor intensive... I solved my problem with added fluid and the PIN 21 modification to reset the alarm.

If both lights are blinking simultaneously when you turn the bike on... that is normal and they should go out after you have ridden the bike a few feet once the ABS sensors tell the ABS brain that the wheels are synchronized.

Give us more info on your symptoms and we will try to help guide you through the diagnosis.

-John
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post #6 of 18 Old Jun 24th, 2016, 10:38 am
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by biometrics View Post
If the two lights are alternating when you turn the bike on, you have an ABS fault (which may be as simple as low fluid, or as complex as a failed ABS pump $$$$$). Do a search for "Pin 21" and you will find plenty of threads with things you can try to eliminate the problem. Some expensive, some labor intensive... I solved my problem with added fluid and the PIN 21 modification to reset the alarm.

If both lights are blinking simultaneously when you turn the bike on... that is normal and they should go out after you have ridden the bike a few feet once the ABS sensors tell the ABS brain that the wheels are synchronized.

Give us more info on your symptoms and we will try to help guide you through the diagnosis.

-John
I might have just learned something. I have not had any ABS issues with my 2001 yet so I never really paid attention to the lights. I just know they flash till I get moving. I will be looking closer to see how they blink now. I didn't know that they both flash at the same time till you get rolling but a wig wag indicates a fault.

Good information.

I don't think the 2000/01 have any reservoir sensor so if he has an alternating flash, there is some other issue.

Gordon
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #7 of 18 Old Jun 24th, 2016, 11:57 am Thread Starter
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Re: ABS blinking constantly - 2000 K 1200LT

Quote:
Originally Posted by biometrics View Post
If the two lights are alternating when you turn the bike on, you have an ABS fault (which may be as simple as low fluid, or as complex as a failed ABS pump $$$$$). Do a search for "Pin 21" and you will find plenty of threads with things you can try to eliminate the problem. Some expensive, some labor intensive... I solved my problem with added fluid and the PIN 21 modification to reset the alarm.

If both lights are blinking simultaneously when you turn the bike on... that is normal and they should go out after you have ridden the bike a few feet once the ABS sensors tell the ABS brain that the wheels are synchronized.

Give us more info on your symptoms and we will try to help guide you through the diagnosis.

-John
wow!! i really appreciate the full explanation. they blink alternatively, so first task will be to check the fluid level (hopefully it will solve the issue), second will be to look for the pin 21.

i will def let you know what happenes after i check the fluid.

Jose
Puebla, Mexico

02/2000 BMW K1200 LT (Canyon Red)
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post #8 of 18 Old Jun 24th, 2016, 12:40 pm
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Re: ABS blinking constantly - 2000 K 1200LT

A battery that is low on voltage can cause the abs to trip. It has been a long time but I think I had mine replaced under warranty since the lights would trip after I started from a stop.

Mike Trevelino
Williamsburg, VA
2008 RT
2000 LT - Totaled at 99,960 miles


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post #9 of 18 Old Jun 24th, 2016, 12:41 pm
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Re: ABS blinking constantly - 2000 K 1200LT

Quote:
Originally Posted by Barkaino View Post
hi guys,

any idea why the abs witnesses in the dashboard blink non-stop one after the other, not at the same time.

thank you!
Check the fluid levels and the sensor distance at the front and rear "wheel pickup" rings. Had the same problem on my 2000 the rear sensor was a few thousands out of range. ONLY showed up when it was cold (temps in the 30's) .

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post #10 of 18 Old Jun 24th, 2016, 1:36 pm
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Re: ABS blinking constantly - 2000 K 1200LT

Possibly getting a signal the one of the brakes is on also. Rear brake light lit up? Check the sensor wires for chaffing.

Beech
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post #11 of 18 Old Jun 24th, 2016, 3:04 pm
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Re: ABS blinking constantly - 2000 K 1200LT

1. If it is a new to you bike and you have not ridden it yet, they flash until the rolling test is performed.

2. On a 2000 LT there are no fluid level monitors to set a fault.

3. If you have ridden it and they still flash there is a fault see this post for ways to reset the ABS.

4. Once you determine the fault and fix it you will have to reset the ABS

There are a few that are easy (wheel sensors dirty, out of adjustment or failed) some are a little harder. Stuck piston fault can often be fixed by cleaning the piston are (details are available).

Good Luck.

John
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post #12 of 18 Old Jun 25th, 2016, 8:35 am
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by jzeiler View Post
1. If it is a new to you bike and you have not ridden it yet, they flash until the rolling test is performed.

2. On a 2000 LT there are no fluid level monitors to set a fault.

3. If you have ridden it and they still flash there is a fault see this post for ways to reset the ABS.

4. Once you determine the fault and fix it you will have to reset the ABS
John's step 4 is essential to emphasize. When the issue is corrected, the alternating ABS error lights will continue to flash until the error code is CLEARED via the Pin #21 procedure identified earlier in thread or with a GS-911 tool. Disconnecting the battery will not clear the code. The Pin #21 procedure or GS-911 will describe the ABS fault.

In my case, the ABS indicated an issue after a rough railroad crossing at speed, and set off the ABS wig-wag error. I used a GS-911 to clear the error. It was a false positive error indication that didn't require anything to be repaired. I got lucky.

If you have extra cash, I highly recommend adding a GS-911 to your tool box. It is simple to use and provides a wealth of information for troubleshooting other LT issues that may arise. With some of the folks on this forum moving to the K1600, you may be able to purchase a GS-911 at a bargain price.

Rob, 2000LT
Navarre, FL
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post #13 of 18 Old Jun 28th, 2016, 4:09 pm
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Re: ABS blinking constantly - 2000 K 1200LT

I'm in the Wig-Wag club! The PO told me about a previous event he had reset. Well 2K miles into my new KLT adventure, the wig-wag fault came on during a ride 2 weeks ago. I reset the system using the Pin-2 Pin-21 long form method, ABS fault cleared. The fault I got from my analog meter was (7) "control unit". All good? Not so fast! Just yesterday it failed again, wig-wag! Reset only lasted 3 days. The system has been flushed by me and the PO, in my opinion well maintained. I have a digital volt meter running in my power outlet and it ranges around 12.6 -13.2v while riding. I have checked the sensor clearances and everything is good when it's sitting in the garage.

Q; Are there additional faults that the GS-911 can read from the ABS or are they the same 10 listed in the (ABS 2 fault reset long)
1. Front pressure modulator.
2. Rear pressure modulator
3. Front wheel speed sensor
4. Rear wheel speed sensor
5 battery voltage too low
6. ABS relay
7. ABS control unit
8. sensor gap front or rear or other outside influence.
9. Unknown .....
16. Failed plunger test

Q; If a sensor faults intermittently, will the fault code stick as "sensor" or can it just read "control unit" when everything reads normal in the garage setting?
Q; Anyone have an ABS-2 control unit go bad or is it usually a peripheral?

2000 KLT, ABS 2

2000 BMW K1200LT
2005 BMW R1200GS
2001 Kaw KX250
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post #14 of 18 Old Jun 28th, 2016, 4:30 pm
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Re: ABS blinking constantly - 2000 K 1200LT

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Originally Posted by mcracer View Post
I'm in the Wig-Wag club! The PO told me about a previous event he had reset. Well 2K miles into my new KLT adventure, the wig-wag fault came on during a ride 2 weeks ago. I reset the system using the Pin-2 Pin-21 long form method, ABS fault cleared. The fault I got from my analog meter was (7) "control unit". All good? Not so fast! Just yesterday it failed again, wig-wag! Reset only lasted 3 days. The system has been flushed by me and the PO, in my opinion well maintained. I have a digital volt meter running in my power outlet and it ranges around 12.6 -13.2v while riding. I have checked the sensor clearances and everything is good when it's sitting in the garage.

Q; Are there additional faults that the GS-911 can read from the ABS or are they the same 10 listed in the (ABS 2 fault reset long)
1. Front pressure modulator.
2. Rear pressure modulator
3. Front wheel speed sensor
4. Rear wheel speed sensor
5 battery voltage too low
6. ABS relay
7. ABS control unit
8. sensor gap front or rear or other outside influence.
9. Unknown .....
16. Failed plunger test

Q; If a sensor faults intermittently, will the fault code stick as "sensor" or can it just read "control unit" when everything reads normal in the garage setting?
Q; Anyone have an ABS-2 control unit go bad or is it usually a peripheral?

2000 KLT, ABS 2
Teach has put his GS911 up for sale if it isn't already gone. Just an FYI.

http://www.bmwlt.com/forums/rt-serie...ml#post1587681
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Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #15 of 18 Old Jun 28th, 2016, 10:53 pm
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Re: ABS blinking constantly - 2000 K 1200LT

Voltage should be up to at least 14 volts while riding. Low voltage will cause the abs to trip.
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Williamsburg, VA
2008 RT
2000 LT - Totaled at 99,960 miles


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post #16 of 18 Old Jun 28th, 2016, 11:11 pm
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Re: ABS blinking constantly - 2000 K 1200LT

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Voltage should be up to at least 14 volts while riding. Low voltage will cause the abs to trip.
I was wondering about that same thing. I have read here about the "low voltage" and the ABS not liking low voltage. What is 'low voltage"? I figured 13v-ish would be good enough.

My battery isn't new but not past it's serviceable date either.

Q; Think the Battery has become resistive and loading down the charging system?

Q; I imaging the alternator is internally regulated like most cars now days?

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2005 BMW R1200GS
2001 Kaw KX250
1974 Kaw KX250
1981 Yam YZ465


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post #17 of 18 Old Jun 30th, 2016, 1:08 am
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Re: ABS blinking constantly - 2000 K 1200LT

I just put 3000 miles on my 2000 LT this past week. I have a digital volt meter as well as a voltage reading on my Escort radar detector. While riding my voltage is usually 13.7 volts. It can go as high as 14 and with everything including lights, seats, grips, and heated clothing it can drop to about 12.9. That is the lowest I have ever seen. You may have a voltage problem.

Still rolling in Southern Oregon
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post #18 of 18 Old Jun 30th, 2016, 4:42 pm
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Re: ABS blinking constantly - 2000 K 1200LT

I just ordered a new Odyssey PC680 Battery for just over $100. The current battery is almost 3yrs old, and after reading how temperamental the KLT can be with batteries and voltage, I have a new one on the way. I also have a GS-911 on the way. I am also going to check all the Ground connections. So after a battery swap and ABS reset (again), we'll hopefully say goodbye to the wig-wag ABS for more than 3 days.

If I don't Re-post or Bump this thread later, assume problem solved.
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