bypass abs - BMW Luxury Touring Community
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post #1 of 23 Old Nov 29th, 2018, 1:33 pm Thread Starter
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bypass abs

Hey all;

Not def yet, but looks like my ABS pump may have finally died after 16 years and 330k miles.
I saw some posts of bypassing that to "normal" braking, which is fine by me.
Most of my 48 years of riding I had normal brakes.
Anyone have a post of instructions?
How to get the speedometer to work without going thru the ABS monitoring?

Zeke

P.S, I talked to the module re-builders guys who dont rebuild the 2002 and up models yet. IABS
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post #2 of 23 Old Nov 29th, 2018, 2:51 pm
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Re: bypass abs

You pretty much have to keep the electronics board from the ABS if you want brake lights and Spedo and Odo. Other wise just put a union up in the front on the frame where the control and wheel circuits are and tie them together (see picture). On the rear you need to get a custom line made to go from the rear caliper hard line to the Master Cylinder (don't have a shot of that).

You can leave the module installed but you need to open up the end (where the plug goes) and disconnect the leads to the servo pumps. Have you run a GS-911 test yet and have a fault code? A couple are easy fixes (high pressure in wheel circuit) but most are not.
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John
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post #3 of 23 Old Nov 29th, 2018, 6:41 pm
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Re: bypass abs

Hi Zeke & John , I think my 2002 LT's ABS is going bad too. I hope to get thru the winter down here in Florida with it , & do the bypass when we get back to Michigan where my tools are.. Thank You for the bypass picture and info John !

Patric Blackman
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2010 R1200GSA ...1987 Helix...
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Last edited by Patric; Nov 29th, 2018 at 6:46 pm.
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post #4 of 23 Old Nov 29th, 2018, 8:27 pm Thread Starter
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Re: bypass abs

Quote:
Originally Posted by jzeiler View Post
You pretty much have to keep the electronics board from the ABS if you want brake lights and Spedo and Odo. Other wise just put a union up in the front on the frame where the control and wheel circuits are and tie them together (see picture). On the rear you need to get a custom line made to go from the rear caliper hard line to the Master Cylinder (don't have a shot of that).

You can leave the module installed but you need to open up the end (where the plug goes) and disconnect the leads to the servo pumps. Have you run a GS-911 test yet and have a fault code? A couple are easy fixes (high pressure in wheel circuit) but most are not.

i have run the test with my gs911, not exactly sure what i'm looking at/for. All it says when I TRY A abs fault reset is possible electrical issue. i will post a couple pics and i'm sure all you can help. run the gs911 on the RT is a piece of cake. the LT not so much.

Zeke
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post #5 of 23 Old Nov 30th, 2018, 7:33 am
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Re: bypass abs

It should give you a fault code and text description of the fault. That is what I am after.

You cannot reset a fault with the 911 on the iABS you have to fix the issue first and it will self clear.
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
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post #6 of 23 Old Nov 30th, 2018, 3:17 pm
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Re: bypass abs

How do you repair the high pressure failure ? Mine is 2005 and the rear high pressure side is failed.
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post #7 of 23 Old Nov 30th, 2018, 9:53 pm
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Re: bypass abs

Quote:
Originally Posted by twoisbest View Post
How do you repair the high pressure failure ? Mine is 2005 and the rear high pressure side is failed.
Often that is caused by a stuck relief valve. They are the big domes on top of the ABS unit. Match up the correct reservoir (short is rear) and remove the dome. You may have to move the output port slightly to be able to get a socket on there. Then cycle the little piston and replace. I think it was 22 MM.
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
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But lack DE, MA, RI and CT with the 2005 LT

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post #8 of 23 Old Dec 1st, 2018, 11:24 am Thread Starter
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Re: bypass abs

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Originally Posted by jzeiler View Post
It should give you a fault code and text description of the fault. That is what I am after.

You cannot reset a fault with the 911 on the iABS you have to fix the issue first and it will self clear.

Had to do all the GS911 Updates. Now it makes more sense. here is what i see. brake bleed or relief valve.
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post #9 of 23 Old Dec 1st, 2018, 7:35 pm
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Re: bypass abs

I would pop off the relief valve and see what happens.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #10 of 23 Old Dec 2nd, 2018, 7:46 am Thread Starter
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Re: bypass abs

Quote:
Originally Posted by jzeiler View Post
I would pop off the relief valve and see what happens.

ok, here we go.. thru step by step troubleshooting, have not done any real work yet. just checking obvious stuff.
the bike goes thru its check and instantly goes to fault, light flashing fast. I put in a brand new battery, Odyssey.
the front brake lever powers up the abs pump, the rear does not. i checked right at the foot brake plug. it shows normally closed and opens when i depress the brake. not sure if that is correct, but shows to me the switch is working. I have to follow that wire around to check the wires and whatever plugs there are. not sure because of the failure light with high pressure rear, IF it prevents the rear brake from activating the pump. i will flush first, due anyways and see where we go from there.
to remove the relief valve, looks like i have to remove the ABS unit. oh JOY.
Thanks for the continued help.

Zeke

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post #11 of 23 Old Dec 2nd, 2018, 12:54 pm
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Re: bypass abs

OK on the switch as it is normally closed and opens when activated. The pump circuit is triggered by both the switch and pressure in the line. If it has the high pressure fault still showing you will not get the rear pump to work until that is fixed. I have never seen this fault clear with a flush, only the relief valve. You do not have to remove the unit to pull the relief valve if you can get a socket in there. Just put an open end wrench on the output port and turn it far enough to get a socket on the relief valve (pull the rubber cover up and off).
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
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But lack DE, MA, RI and CT with the 2005 LT

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post #12 of 23 Old Dec 2nd, 2018, 1:29 pm Thread Starter
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Re: bypass abs

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Originally Posted by jzeiler View Post
OK on the switch as it is normally closed and opens when activated. The pump circuit is triggered by both the switch and pressure in the line. If it has the high pressure fault still showing you will not get the rear pump to work until that is fixed. I have never seen this fault clear with a flush, only the relief valve. You do not have to remove the unit to pull the relief valve if you can get a socket in there. Just put an open end wrench on the output port and turn it far enough to get a socket on the relief valve (pull the rubber cover up and off).

thanks for the info AGAIN.
looks awful tight in there. Not sure i can get a 27 mm socket in there. on the 02 it sits where the valve face the rear. i will take a look again.
but you are correct, I did the flush, no change. so down to the pressure relief.
Let you tomorrow afternoon.

Zeke
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post #13 of 23 Old Dec 2nd, 2018, 4:43 pm
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Re: bypass abs

Could you get a crows foot in there on it ?

Patric Blackman
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2010 R1200GSA ...1987 Helix...
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post #14 of 23 Old Dec 2nd, 2018, 5:08 pm Thread Starter
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Re: bypass abs

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Originally Posted by Patric View Post
Could you get a crows foot in there on it ?
now that's possible.. i have a full set, not sure if it goes to that size.
will let you know
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post #15 of 23 Old Dec 3rd, 2018, 3:38 pm
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Re: bypass abs

I forgot you have a 2002, that does make it a bit more of a challenge. May be able to remove the reverser controller to be able to get in there. I would rather pull that than the ABS unit. Just keep track of the big wires and where they go. Should be just one nut on the bottom.
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post #16 of 23 Old Dec 5th, 2018, 2:15 pm Thread Starter
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Re: bypass abs

mr. john;

ok i got that one loose and out. difficult, but yes i figured if you move the reverser you can barely reach it with an extra deep.
had it out seemed to be a little stuck,was very clean, exercised it quite a bit reinstalled and SOL.. same issue. Only thing left I can figure is what ever reads the signal from the board is bad. sigh. EBAY here I come.. Any other thoughts. Think I am down to the ABS UNIT failure..
It happens we move on.
I will say for the week that she was back on the road was PURE joy. The RT is great but it aint a LT.. Sorry RT fans.
Both are great bikes.

Zeke

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post #17 of 23 Old Dec 5th, 2018, 2:31 pm
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Re: bypass abs

There are two sets of transducers that actually measure the pressure. I suppose one of them could be bad or there is something clogging the output on the rear circuit causing pressure to be too high. Maybe Module Masters will be up and running on rebuilds soon.
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
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But lack DE, MA, RI and CT with the 2005 LT

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post #18 of 23 Old Dec 5th, 2018, 4:56 pm
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Re: bypass abs

There is a guy on Facebook parting out a 2002 LT I can message him for a price on his ABS unit.

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post #19 of 23 Old Dec 5th, 2018, 6:19 pm Thread Starter
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Re: bypass abs

Quote:
Originally Posted by jzeiler View Post
There are two sets of transducers that actually measure the pressure. I suppose one of them could be bad or there is something clogging the output on the rear circuit causing pressure to be too high. Maybe Module Masters will be up and running on rebuilds soon.
i called module masters and they said they still dont have the rebuild for ABS111 ready yet, still saying a few months.
but from other posts, they have been saying that for a few years.
EBAY, around 200 and up and take my chances.

Zeke

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post #20 of 23 Old Dec 5th, 2018, 6:21 pm Thread Starter
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Re: bypass abs

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There is a guy on Facebook parting out a 2002 LT I can message him for a price on his ABS unit.
please. that would help out. I only see a few out there.
keep me posted


Zeke
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post #21 of 23 Old Dec 6th, 2018, 7:47 pm
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Re: bypass abs

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Originally Posted by Zeke View Post
please. that would help out. I only see a few out there.
keep me posted


Zeke
I have a price on the ABS unit contact me.

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post #22 of 23 Old Dec 7th, 2018, 5:18 am
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Re: bypass abs

Will units from any other of the bikes fir 1200LT ?
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post #23 of 23 Old Dec 7th, 2018, 6:55 am
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Re: bypass abs

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Will units from any other of the bikes fir 1200LT ?
NO , you need to stay within certain years range for your model. There are 3 types altogheter:

1) K1200LT of 1999-2001 (for USA market) having ABS2 units - these have no servos and are very different than later models.

2a) K1200LT of 2002-2004 (for USA market) have the iABS units with servos - modulator is installed Vertically in frame.

2b) K1200LT of 2005-2009 (for USA market) have the iABS units with servos - modulator is installed Horizontally in frame.

Although internally most parts are the same for the units of item 2a) and 2b) above (2002 to 2009 models), because of external design changes they cannot be interchanged or installed into other years.

NOTE that if your K1200LT was built for a market other than USA (Europe, Canada, Australia), the years above will change slightly as the design change was offered in 2001 instead of 2002 in other countries - so item 2a) above would become 2001-2004 for 1st generation having iABS.

FURTERMORE.... Most Boxer models of 2001-2004 also had a similar iABS unit with servos, but the mounting was a bit different. Again, many of the internal parts were the same. All these iABS modulator were built by FTE in Germany custom specs for BMW. They both had a somewhat "secret" arrangement where FTE would not sell units or parts directly to anyone else.

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