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  Topic Review (Newest First)
Apr 5th, 2014 9:39 am
rwischmann
Re: 2005 ABS failure...what am I missing?

I used Scientific Automotive to repair my ABS. (No braking without the ABS module in my 2002 LTC) I removed and reinstalled it myself, but it took two repair jobs to get it working right and each time I had to take it to the dealer for them to run their computer tests. The unit is working fine now, or has been for the last few months, but it really was a PIA to get it to this point. The SA tech was very understanding, good communication but like I said it took 2 attempts to get it right.
Apr 3rd, 2014 10:04 pm
wa1200lt
Re: 2005 ABS failure...what am I missing?

Integrated ABS started production date January1, 2001. All the good LT's were mfg on or before 12/31/2000!

Loren
Quote:
Originally Posted by gary45 View Post
late 01 power brakes started - to bad they did not run the pump off the engine as in cars and trucks - would have been as reliable as them then
Apr 3rd, 2014 6:35 pm
Otto27
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by revrider1213 View Post
My abs module has failed, according to my mechanic. He is quoting me $2195 plus 4.5 hours labor. Not bad for that, as I understand it. And he says he can get an OEM module in 3-7 days.

I've talked to Module Masters...no parts for at least 4-6 weeks. I've emailed Automotive Scientific in Tennessee, but no reply yet. The Beemer Boneyard is a no-go. Not interested in shipping it to RHElectric in Germany.

So, what have I missed as far as options go? I'm trying to cover all my bases...

Thanks!
Jeremy
Jeremy, Just curious how many miles do you have on the 05?
$2195 is a big hit I... feel for you.
Apr 3rd, 2014 3:17 pm
Airportech
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by andres View Post
The mechanical modifications appear to be simple, what I would like to know about are the electrical procedures to keep all the other stuff working that relies on the ABS modulator for some function - cruise control, brake lights, dash warning lights, center stand, etc. Please provide us with a short summary of what actions you took when removing the ABS modulator.
As you say the re-piping of the brake lines is easy enough the electrical side was a bit more of a concern, on mine I removed the ABS unit stripped off the electrical unit this revealed two pairs of heavy duty wiring a pair went to each of the electric motors for the ABS pump these were plugs which I disconnected, there was also a pair of ribbon type looms, I disconnected these via the plugs on the PCB. I removed the plastic cover on top of the ABS unit and cut the wire #9 this turns off one of the ABS warning lights the other warning light is turned off by removing the ABS relay under the fuel tank, while the tank is off you can link up the front brakes by joining the steel brake pipes, everything electrical works fine and as I had a 1999 model before I'm used to the brake efficiency difference, I don't have a problem with the brakes you just ride accordingly.
Bren
Apr 3rd, 2014 10:34 am
gary45
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by andres View Post
The brake servo in automotive vehicles uses the vacuum developed in the intake manifold as its source of power, in a diesel it used to be an engine driven vacuum pump. But the ABS modulator on any automotive is also electrically powered, just as the LT's modulator. The ABS pumps on auto's also don't last forever and depending on the vehicle may cost as much as the LT's to replace.
my 85 Audi had an engine (belt) driven high pressure hydraulic pump for both the power brakes and steering - GM uses them on diesel pick up trucks even back in the early 90's - ABS seperate module but not combination like on the LT which is a problem since you lose both and it is around $2K to buy

my VW diesels all had engine driven vacuum pump for the power brakes
Apr 3rd, 2014 9:20 am
andres
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by gary45 View Post
late 01 power brakes started - to bad they did not run the pump off the engine as in cars and trucks - would have been as reliable as them then

The brake servo in automotive vehicles uses the vacuum developed in the intake manifold as its source of power, in a diesel it used to be an engine driven vacuum pump. But the ABS modulator on any automotive is also electrically powered, just as the LT's modulator. The ABS pumps on auto's also don't last forever and depending on the vehicle may cost as much as the LT's to replace.
Apr 3rd, 2014 8:09 am
gary45
Re: 2005 ABS failure...what am I missing?

late 01 power brakes started - to bad they did not run the pump off the engine as in cars and trucks - would have been as reliable as them then
Apr 3rd, 2014 8:01 am
timgray
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by K100Dennis View Post
I totally agree, the IABS system on the 2004 and later models is capable of developing extremely high clamping forces whilst also being capable of making up for any lack of braking expertise by the rider. This was the focus of BMW's development of this system (see attached pdf).
I thought 2003 was when they started the Servo assist, my 2003 has the servo assist and has stronger brakes than I have seen on race cars. The stopping distance is so short that I absolutely freak out guys I ride with. They dont want me in the middle of the pack as most of their big harleys and goldwings will not stop in 3X the distance I can stop in.

did they put even more brakes on the 2004 and up? I cant imagine being able to stop faster than what I can now.
Apr 2nd, 2014 9:18 pm
K100Dennis
Re: 2005 ABS failure...what am I missing?

I totally agree, the IABS system on the 2004 and later models is capable of developing extremely high clamping forces whilst also being capable of making up for any lack of braking expertise by the rider. This was the focus of BMW's development of this system (see attached pdf).
Apr 2nd, 2014 6:16 pm
jackd
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by revrider1213 View Post

Does anyone have extended experience riding a k1200 without ABS? What problems did you experience?
I have an ABS II setup on my LT. I started to have problems and was able to reset the faults and it worked for about 3K miles. I had put about 90K miles on my LT when I started experiencing ABS modulator problems. I also put Speigler brake lines on about 25K before the failure. This IMHO, is relatively important point as I became accustomed to applying the brakes, as needed, and not concerning myself with wheel lockup. The more miles the more I used the technology. Eventually I braked the maximum I needed to take advantage of the technology. In a few instances it kept me safe. One of the reasons I bought the LT was the ABS. I had a run in with a deer on a GL1500 that caused me to have a slow speed front wheel lockup during the panic stop.

Unfortunately my ABS failed about 2K miles into an 8K tour of the Canadian Rockies. I had at least 2 hard stops and both times, even though I was cautious because I knew I did not have ABS, I had wheel lockup and a much longer stopping distance.. So if you have not become very familiar with ABS it may work for you, but it did not for me. I repaired mine when I could get a used ABS module. I did the job myself and kept my costs under $800. Repairing mine at the dealer made my LT almost a throwaway or a parts bike.

Bottom line for this is the brakes are very good on the LT and engineered to have the ABS functional. Reacting in a panic, pre-accident scenario the ABS can save your 'bacon' as it did mine.
Apr 2nd, 2014 5:13 pm
andres
Re: 2005 ABS failure...what am I missing?

The mechanical modifications appear to be simple, what I would like to know about are the electrical procedures to keep all the other stuff working that relies on the ABS modulator for some function - cruise control, brake lights, dash warning lights, center stand, etc. Please provide us with a short summary of what actions you took when removing the ABS modulator.
Apr 2nd, 2014 4:00 pm
Airportech
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by sgroover View Post
I have several thousand miles on my 06 with only manual brakes. MM is a great company, but they have been working to repair the iABS modules for a long time. Each time I spoke with them, it was another month or so.

My module went out last August. I did a by pass and have all functions, (cruise, speedo, etc) and the bike stops great. I do love ABS, but not the servo assist on the K1200LT and especially the cost to repair.

Sammy
With a bit of help and reassurance off Sammy I removed my ABS modulator on my 2005 LT and the brakes work just fine, I did own a 1999 model previous to this and that had no modulator and I haven't noticed any difference in the braking effort between the two, the modulator was readily available here in the UK from the main agents the cost was 1500 but decided against it.

Bren
Apr 1st, 2014 11:40 pm
K100Dennis
Re: 2005 ABS failure...what am I missing?

Is this a physical bypassing of the module by new/additional brake lines ? If so, can we see some pics please. This may become a more common option in the future as our bikes become less supported by the OEM.
Apr 1st, 2014 11:06 pm
sgroover
Re: 2005 ABS failure...what am I missing?

I have several thousand miles on my 06 with only manual brakes. MM is a great company, but they have been working to repair the iABS modules for a long time. Each time I spoke with them, it was another month or so.

My module went out last August. I did a by pass and have all functions, (cruise, speedo, etc) and the bike stops great. I do love ABS, but not the servo assist on the K1200LT and especially the cost to repair.

Sammy
Apr 1st, 2014 1:36 pm
gary45
Re: 2005 ABS failure...what am I missing?

There are other brand bikes which are as heavy or heavier than the LT without power brakes, there have been a number of owners who have bypassed the servo unit without braking problems. There is a way to leave the control pc board on the bike so speedo etc. work.
Apr 1st, 2014 12:34 pm
copperstatetour
Re: 2005 ABS failure...what am I missing?

Quote:
Originally Posted by revrider1213 View Post
Thanks for the input, guys.

I've thought about going ABS-less. I've ridden an HD Sportster for years without ABS. However, the BMW without ABS doesn't seem to inspire the same confidence as my Sportster when it comes to braking. Maybe that is just me.

Does anyone have extended experience riding a k1200 without ABS? What problems did you experience?

Thanks!
Jeremy
10K+ since my ABS went out and not a problem, of course I have a '00 so non-servo brakes. bypassing the module on a 2005 I think would produce a similar result to what I have, the calipers are different but I din't think substantially enough to make a difference. Having said that, if you can get it fixed ABS working is better than no ABS, my not having fixed it is a combination of lazy and not wanting to have the bike down for a few weeks while I send the unit off to be repaired.
Apr 1st, 2014 9:40 am
revrider1213
Re: 2005 ABS failure...what am I missing?

Thanks for the input, guys.

I've thought about going ABS-less. I've ridden an HD Sportster for years without ABS. However, the BMW without ABS doesn't seem to inspire the same confidence as my Sportster when it comes to braking. Maybe that is just me.

Does anyone have extended experience riding a k1200 without ABS? What problems did you experience?

Thanks!
Jeremy
Apr 1st, 2014 9:39 am
andres
Re: 2005 ABS failure...what am I missing?

If it is a 2005 model it would have the integrated ABS system with which there is no driving with lights flashing. With the servos gone the braking is just about non-existent. Recently Module Masters stated that they were not ready yet to repair the iABS servo. If they can now perform repairs on the integrated ABS module I'd give them a shot at it.
Apr 1st, 2014 7:35 am
mtrevelino
Re: 2005 ABS failure...what am I missing?

I would go with Module Masters. Others have had good success with them. Having to go 4 to 6 weeks before they get the parts (from what I am reading in your post) should not be a issue with driving your LT with the lights flashing.
Apr 1st, 2014 12:35 am
K100Dennis
Re: 2005 ABS failure...what am I missing?

I think the only other option you haven't mentioned is the possibility of completely eliminating the ABS module and going with manual hydraulic braking. Some have posted about this recently. I have a couple of questions though - I contacted module masters about 2 years ago regarding rebuilds of 2005 model componenets, they said they were yet to attempt one, possibly based on effort vs volume. The other interesting comment is the 3 - 7 days for OEM parts delivery. A while back it was posted here that parts were scarce world-wide. I'm sure others will chime in with answers.
Mar 31st, 2014 7:35 pm
revrider1213
2005 ABS failure...what am I missing?

My abs module has failed, according to my mechanic. He is quoting me $2195 plus 4.5 hours labor. Not bad for that, as I understand it. And he says he can get an OEM module in 3-7 days.

I've talked to Module Masters...no parts for at least 4-6 weeks. I've emailed Automotive Scientific in Tennessee, but no reply yet. The Beemer Boneyard is a no-go. Not interested in shipping it to RHElectric in Germany.

So, what have I missed as far as options go? I'm trying to cover all my bases...

Thanks!
Jeremy

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