2006 R1200GS Servo Brakes fault codes

[stretch]

Hi GS-911ers,

I' ve got the ABS-light flashing fast (4/s) and therefore neither
servo-assisted brakes nor ABS
on my 2006 R1200GS.

GS-911 throws:
24970 Pressure in front wheel circuit too low
25190 Front brake switch
24966 Pressure in rear wheel circuit too low

Both Front and Rear brake switch operation is fine (no brake light,
when non-operated...)
Speedometer works as expected
Fluid levels in ABS-Unit (under tank) are ok.

If anyone has had the same symptoms or knows a solution, I would
appreciate
a response.

Best regards
Stretch

[Ken Gotzenberg]

I've been experiencing the exactly same symptoms on my '05 RT. Several shops have come up with the same fault codes, but haven't fix it problem.

It seems to be related to the ambient temp--whenever it gets above ~90 degrees, I get the 1/s ABS Triangle, then if I pull hard on the front brake, it goes to 4/s. Problem goes away when the temps goes down.

Just checked it out again today (it's 93 outside). Checked all switches, front & rear ABS sensors, and the DOT 4 has been changed out in all circuits last week....new battery....still can't find the source of my grief.

I don't have a GS 911 (yet)....I keep checking this forum to see if it can help pinpoint the problem.

I'll keep tuned in....

Ken G

--
Please note our new address, phone & e-mail address:

Ken & Shirley Gotzen-Berg
4585 E. Vermilion Ave.
Kanab, Utah  84741
(435) 616-2203
gotzen...@gmail.com

[Lloyd Provin Jr]

Did this problem appear after or before the brake fluid was changed?

  
Lloyd (Bud) Provin, Jr
THE NICKWACKETT GARAGE
802-483-2460


 






 

---

Date: Mon, 17 Aug 2009 16:13:41 -0600
Subject: [GS-911] Re: 2006 R1200GS Servo Brakes fault codes
From: gotzen...@gmail.com
To: gs-...@googlegroups.com

[Ken Gotzenberg]

Bike had this problem almost since birth. I've leaned to live with it. Several shops have looked at it, and observed the same fault codes as Stretch....one shop adjusted and re-adjusted the rear brake lever, another simply bled off some "excess brake fluid" from the front master cylinder. I'm hoping it's not the ABS servo unit ($$$!!!).

[Julio Garcia Llama]

Check that the break lever does not touch the plastic protector, thus creating a mess in the control unit.

2009/8/17 stretch <blo...@gdead.de>

--
Julio Garcia Llama.
Torremolinos (Málaga)

[stretch]

Definitively no sticking lever or switch, I've even disassembled,
cleaned
and readjusted the front brake switch.

History:
08/2007 20000km
Brake fluid in wheel circuits changed by dealer.

08/2008 24000km
First ocurrence of servo failure. After replacement of oem-battery
with
Hawker Odyssey PC535, problem was cured.

04/2009 27000km
After annual deep battery-discharge over winter ;-( and recharging
problem recurred:
Servos intermittently kept running after turning on ignition without
touching levers.
Battery-test done, ok. After riding some 100km problem disappeared.

07/2009 28000km
Intermittent servo operation and non-operation recurred.
Disconnected plug to ABS-unit in the half of a 5000km-Italy-France-
tour (including Stella Alpina)
because of not wanting random servos. Got used to residual brakes,
not that bad... except for no speedo- and odometer without connected
ABS-plug.

08/2009 app. 32000km
Reconnected plug to ABS-unit, speedo working again, but ABS-servo-pump
seems to be dead now. No whine (except fuel pump) after ignition on.
Even using a switch-mode power supply 14V-5A connected to the battery,
ABS pump denies operation.

I've still:

24970 Pressure in front wheel circuit too low
25190 Front brake switch
24966 Pressure in rear wheel circuit too low

On 20 Aug., 19:20, Julio Garcia Llama <juliogarciall...@gmail.com>
wrote:

> Check that the break lever does not touch the plastic protector, thus
> creating a mess in the control unit.
>

> 2009/8/17 stretch <blog...@gdead.de>

[Julio Garcia Llama]

If you check, efore starting that the rear brake light is not "on", thet means the lever switches are not operating.

If battery connections are clean and thight. then OK

The only other think is the break fluid, ut dearls shoulf have done it well. Probabaly do it once more

So, it could be a ailure of the electronic unit... I hope not... the must b e expensive...

2009/8/22 stretch <blo...@gdead.de>

[pat.k...@btinternet.com]

It is indeed failure of the unit.

------------------
Patrick Keenan
Mobitec
+44 (0)7779 528715

---

From: Julio Garcia Llama
Date: Sun, 23 Aug 2009 13:06:43 +0200
To: <gs-...@googlegroups.com>

Subject: [GS-911] Re: 2006 R1200GS Servo Brakes fault codes

[pat.k...@btinternet.com]

By pass the unit. You'll tjen have a 'non abs spec Gs'..

------------------
Patrick Keenan
Mobitec
+44 (0)7779 528715

---

From: Julio Garcia Llama
Date: Sun, 23 Aug 2009 13:06:43 +0200
To: <gs-...@googlegroups.com>
Subject: [GS-911] Re: 2006 R1200GS Servo Brakes fault codes

[Christopher Capobianco]

IMHO   I would tend to agree that you will need unit replacement how many miles on your bike. it should be covered under factory warranty if your within 3yrs 36k I am not sure if bmw has changed that at anytime,  Any way,  how many time have you tried to clear the fault and does it come back immediately!  sometimes especially the GS bikes if your are riding in pretty dirty conditions the signals to the controller could be weak I have had bikes that had dirty contacts to controller trip fault codes and simply re seating the connector has remedied the faults.  If you are out of warranty this is a costly repair contact me for more information about abs repairs     Chris     chrisca...@hotmail.com
 

---

Date: Sun, 23 Aug 2009 13:06:43 +0200

Subject: [GS-911] Re: 2006 R1200GS Servo Brakes fault codes

From: juliogar...@gmail.com
To: gs-...@googlegroups.com

[Stephan Thiel]

hi Strech,

could you copy-paste the ECU info for this control unit pls?

suggested treatments are given as follows:
identical for "24970 Pressure in front wheel circuit too low" and "24966
Pressure in rear wheel circuit too low" in the following order (with
front/rear respectively):
- Pressure in front/rear wheel circuit too low
- Resistance front/rear sensor line
- Front/Rear sensor Function test
- Check handbrake/footbrake light switch
- Replace control unit

and for "25190 Front brake switch"
- Note, programming/coding
- Pressure in front wheel circuit too low
- Check handbrake light switch
- Replace control unit

Form the above, I would definitely test the sensors and sensor lines...

Being the ABS3-CAN (older/servo version of the ABS on the R1200), I
would suggest having it bled correctly - using a GT1 (until such time
that GS-911 supports this function) - According to BMW, the servo based
ABS units (1150 and 1200) should not be bled without a diagnostic tool,
although many people do normal maintenance bleeds (see procedure as
shown by Jim von Baden in his R1200 Maintenance DVD) - I'm a little
reserved as to what would happen should their be air in the Control unit
itself...

Also let us have that ECU info, so I can look up whether their are any
software updates for that module...

best,
Stephan

--
========================
Stephan Thiel
www.hexcode.co.za
+27 21 880 1433 (tel)
0 86 614 1109 (fax)
========================

NB: This email and its contents are subject to the HEX EMAIL LEGAL NOTICE which can be viewed at http://www.hex.co.za/email_legalnotice

[stretch]

Hi Stephan,

thank you for making me catching at a straws again!

Any suggestions on how to test the sensors and lines?
Ohm-/Volt-/Ampere-meter is on hand and oscilloscope within reach...

Since resetting the fault codes last time, they did not rise up again.
But the servos do not power up at all now.

I'm already planning a trip to the dealer (GT1-bleeding et al.),
but this only pays off if there is no dead unit.

Bike is out of warranty and very likely goodwill, because it has not
been dealer-serviced since 08/2007.

ECU-Info:
Integral ABS - CAN
Part No.:07697383
HW Version No.:4
Coding Index:A
Manufacturer:FTE
Manufacturing Date:2005-10-25
MCV:0.5.7
FSV:1.4.3
OSV:3.3.0
VIN:ZR38730
Assembly No.:07697383
FTE Serial No.:54830745X
Hardware No.:07653569
Hardware star No.:07697383
ICT barcode:3E95EA85
Housing barcode
part number:532222804
Serial number:12120
Internal index number:21
FTE serial number
Serial number of device:107
Modulator:080
Main computer date:2003-02-18
Communication & control computer date:2005-02-14
Communication & control computer version:V03.11

Best regards
Stretch

[Mark]

Stretch,

I suffered similar issues on my 05 R12GS after bleeding per the JVB
instuructions listed by Stephen. Turned out to be a dead servo unit.
I suspect it was from the bleed and that I just squeezed a lever a bit
to hard. I was not experiencing any issues before I bled my brakes.
I'd concur with Stephen and would recommend dealer brake bleeds until
the GS-911 has the bleed functionality.

If your unit is bad you can remove and convert to non-abs. You'll
have to modify the wire harness and have the dealer reprogram. I did
a write up on ADVrider. Link to the conversion post is at
http://www.advrider.com/forums/showpost.php?p=7948825&postcount=16

Cheers,

Mark

> > > 24966 Pressure in rear wheel circuit too low- Hide quoted text -
>
> - Show quoted text -

[Mario Guzman]

Mark, what do you think you made wrong on the bleeding like JVB?

Is this procedure dangerous?

I made it 1 time and woked fine and took it to the dealer to verify ant test it with the GT1, passed.

I never espected that the unit can get broken.

What do you mean squezzed the lever too hard?

 

Mario

2009/9/1 Mark <baja...@gmail.com>

[Mark]

Mario,

The procedure requires you to squeeze the brake lever to activate the
servo pump. I know I squeezed the lever past the point where it just
turns on the pump (like I would do on a normal brake bleed). I never
saw a warning about this so didn't think it would hurt.
My ABS failure occurred immediately after the brake bleed. Servo
would work intermittently at times and then finally not at all. Maybe
it was just coincidence that the pump failed, I don't have any way to
really know. The BMW GT1 readouts of the failure are posted on that
same ADVrider thread.
Anyways, don't want to get to far off the GS-911 topic here. Feel
free to email me off list if you have questions about the servo
removal.

Mark

On Sep 1, 12:38 pm, Mario Guzman <mariogs...@gmail.com> wrote:
> Mark, what do you think you made wrong on the bleeding like JVB?
> Is this procedure dangerous?
> I made it 1 time and woked fine and took it to the dealer to verify ant test
> it with the GT1, passed.
> I never espected that the unit can get broken.
> What do you mean squezzed the lever too hard?
>
> Mario
>

> 2009/9/1 Mark <bajari...@gmail.com>

> > > - Show quoted text -- Hide quoted text -

[stretch]

Indeed, it turned out to be a bad servo unit. Dealer confirmed all
sensors
and switches to be ok and pulled something like "offset values of
internal
pressure sensors not ok" with the GT1.

After assigning him to do the ABS-removal job based on Marks ADV-Rider
thread he did some own research and fantastically all of a sudden it
was possible to get a new unit free of charge even though I'm
servicing the
bike on my own.

Many thanks to all you fellow GS-911ers who contributed!

Lesson learnt:
24970 Pressure in front wheel circuit too low, 25190 Front brake
switch,

24966 Pressure in rear wheel circuit too low

are very likely based on a bad servo unit.

Best regards
Stretch

On 1 Sep., 21:15, Mark <bajari...@gmail.com> wrote:
> Stretch,
>
> I suffered similar issues on my 05 R12GS after bleeding per the JVB
> instuructions listed by Stephen.  Turned out to be a dead servo unit.
> I suspect it was from the bleed and that I just squeezed a lever a bit
> to hard.  I was not experiencing any issues before I bled my brakes.
> I'd concur with Stephen and would recommend dealer brake bleeds until
> the GS-911 has the bleed functionality.
>
> If your unit is bad you can remove and convert to non-abs.  You'll
> have to modify the wire harness and have the dealer reprogram.  I did

> a write up on ADVrider.  Link to the conversion post is athttp://www.advrider.com/forums/showpost.php?p=7948825&postcount=16