RE: Update K1200LT Intg. ABS Fault

[Ernie]

Update:

Thanks for some excellent resources that were emailed to me about bleeding
brakes on the Integral ABS. I have now become an expert at bleeding brakes
on this thing, however I now have other issues with this system. I'm trying
to draw on the expertise of many of you before caving in and taking this
into the dealer for expensive repairs.

Issues now are:

First I start the bike and roll a few feet to initiate the check process.
All seems fine until I make a brake application then the warning lights
flash a fault. The ABS unit comes on and the brakes freewheel, catch and
then freewheel again. I pull it into the garage and put the GS911 on and the
following is displayed:

1. Code 17181: Pressure in front wheel circuit to low
Is there a way to determine if there is still air trapped in the ABS unit or
that the ABS unit is defective? If the ABS unit is truly defective will it
throw its own code stating such? Does anyone have knowledge of the integral
part of this unit? Would a rear brake master cylinder line force air into
both circuits (rear as well as front)? I have bled all circuits using Speed
Bleeder bags and I don't see any air bubbles of any quantity that I can
attribute to coming from within the system, however some might be coming
from around the threads of the standard bleeders, thus I'm barely cracking
them open when pumping the levers.

2. Code 17915: Defective Warning lamp
All lamps that I can tell are lighting up correctly, including the rear
brake lights.

I'm feeling that there is still air trapped in the ABS unit, or at least I'm
hopeful that is the case since replacing the unit will cost a pile of money.
The light issue is stumping me too. Any help would be greatly appreciated.

Also: Is there a resource that states all of the fault codes for each bike
model? If so where do I locate it?

Regards,

Ernie Azevedo
Milwaukie, Oregon, USA

-----Original Message-----
From: ErnieA [mailto:erniea...@comcast.net]
Sent: Thursday, September 15, 2011 10:42 PM
To: GS-911 Field Diagnostic Tool for BMW motorcycles
Subject: Replacing a rear master cylinder hose on a K1200LT Intg. ABS

Hello group:
Subject bike: 2002 BMW K1200 LTC - USA - With Integral ABS

Thank you in advance for reading my post. I had a rear master cylinder hose
break, and I've replaced it, and now trying to bleed the air from the ABS
control circuit. I believe I have succeeded in getting all of the air from
the ABS control unit, but am not sure. I used the pressure system and bled
the long screw closest to the battery. I haven't bled the front circuit or
any of the calipers yet. I decided to apply the lever full on and there is
not an ABS light on until operating the front brake lever. The fault that
shows up is: "17425 - Internal control module error - rear control valve
defective".

Is this error because I haven't finished bleeding the system or have I
damaged the ABS in some fashion? Anyone have this error show up before, or
have a book with instructions on how to troubleshoot this error? There are
more ports on the ABS unit that I haven't touched. I know the long bleed
screw that is furthest from the battery is for the front wheel circuit. I
assume the shorter bleed screws are for the corresponding circuits near the
longer screws. Should those ports be bled too? If so, in what order. The
repair manuals I have at my disposal are wholly inadequate, so any help from
this group is much appreciated.

Regards,
Ernie
Milwaukie, OR

[paul...@bigpond.net.au]

My k1200rs was good till i replaced a brake line - it was then a yr of living dangerously! Turns out that the bike prob never had the fluid changed before. Neither I or the dealer could fix it, in the end i paid my money and it now appears to be fixed.

In Australia, they try to chg nearly $4k just for the parts which I ended up getting fm the UK for just under $2k plus $800 to fit by the dealer.

If ur bike has not been bled in the past it may simply be the integral abs unit creating your problems i am told that in Aust the regs prevent you being able to service the Unit so u need to buy a new one.

In many ways I am glad i did. i would try and find a mechanic familiar with the bike and get them to look. IMO BMW have created a prob with these brakes - when they work they are great.....but when they dont..... f*#&k!!!!!! It's annoying.

Best of luck.

Milo
Melbourne Australia

Update:

Issues now are:

Regards,

Regards,
Ernie
Milwaukie, OR

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[René Olaerts]

 Dear Ernie .

    I had about the same faultcode on my LT as you mention , only " Pressure in front wheel circuit to high'
After many try, i found out that the main rear brake cylinder was defected. I found it out by disconnecting the
rear brake circuit from the ABS unit . The fault code was gone then. Cost brake cylinder : more or les 150 $ us

 Regards Rene

> From: erniea...@comcast.net
> To: gs-...@googlegroups.com
> Subject: [GS-911] RE: Update K1200LT Intg. ABS Fault