BMWSportTouring BMWST DB
Previous Thread
Next Thread
Print Thread
Page 5 of 5 1 2 3 4 5
#1006352 - 02/27/18 06:29 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: May 2012
Posts: 97
oilhead1100s1150rt Offline
Member
oilhead1100s1150rt  Offline
Member

Joined: May 2012
Posts: 97
South East PA
Thanks DR, very helpful.

I see nothing in the shop manuals about doing any reset after the flush. I also am replacing the lines with SS. Do I need to reset the ABS warnings at all? I am under the impression, they reset with every start of the ignition.

Dave


Dave
2002 r1150rt | 2003 r1100sa | 1986 k75 -sold
#1006355 - 02/27/18 06:49 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: Jun 2010
Posts: 14,521
dirtrider Offline
The Oracle
dirtrider  Offline
The Oracle
Member

Joined: Jun 2010
Posts: 14,521
Ohio
Originally Posted by oilhead1100s1150rt
Thanks DR, very helpful.

I see nothing in the shop manuals about doing any reset after the flush. I also am replacing the lines with SS. Do I need to reset the ABS warnings at all? I am under the impression, they reset with every start of the ignition.

Dave



Afternoon Dave

Your I-ABS (servo system) re-sets at every new key-on, when reading about BMW ABS don't confuse your system with the older ABS-2 system as that is manually re-settable.

BUT!-- always a but, you can t-r-y disconnecting your battery for about 5 minutes or remove the plug from your ABS controller for about 5 minutes as that will totally clear the ABS electronics. (big IF on this one though)


D.R. ___
Sent from my rotory dial wall phone!
#1006384 - 02/28/18 02:57 AM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: May 2012
Posts: 97
oilhead1100s1150rt Offline
Member
oilhead1100s1150rt  Offline
Member

Joined: May 2012
Posts: 97
South East PA
Ever use a Mityvac to help with the bleeding? Better to just utilize the internal servo pumps?


Dave
2002 r1150rt | 2003 r1100sa | 1986 k75 -sold
#1006389 - 02/28/18 11:03 AM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: Jun 2010
Posts: 14,521
dirtrider Offline
The Oracle
dirtrider  Offline
The Oracle
Member

Joined: Jun 2010
Posts: 14,521
Ohio
Originally Posted by oilhead1100s1150rt
Ever use a Mityvac to help with the bleeding? Better to just utilize the internal servo pumps?



Morning Dave

You don't need a Mityvac for the control circuits & using the key-on servo pump running is definitely best for the wheel circuits. Hopefully the servos keep working long enough to bleed the wheels circuits.


D.R. ___
Sent from my rotory dial wall phone!
#1006488 - 03/01/18 01:09 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: May 2012
Posts: 97
oilhead1100s1150rt Offline
Member
oilhead1100s1150rt  Offline
Member

Joined: May 2012
Posts: 97
South East PA
New brakes lines on order, will replace this weekend.

I believe the servo pumps will work for bleeding. From what I understand, I will need to run the pumps for one lengthy and thorough cycle to flush. My front circuit dies after three cycles on average, so I should be OK.

After researching fluid types, I see synthetic - DOT4 and DOT 5.1 are interchangeable. There are many threads already debating general characteristics. The bikes say DOT4 on the filler caps, as you know. With DOT 5.1 having a higher boring point. For these older bikes, do you have a recommendation?


Dave
2002 r1150rt | 2003 r1100sa | 1986 k75 -sold
#1006491 - 03/01/18 01:35 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: Jun 2010
Posts: 14,521
dirtrider Offline
The Oracle
dirtrider  Offline
The Oracle
Member

Joined: Jun 2010
Posts: 14,521
Ohio
Originally Posted by oilhead1100s1150rt
New brakes lines on order, will replace this weekend.

I believe the servo pumps will work for bleeding. From what I understand, I will need to run the pumps for one lengthy and thorough cycle to flush. My front circuit dies after three cycles on average, so I should be OK.

After researching fluid types, I see synthetic - DOT4 and DOT 5.1 are interchangeable. There are many threads already debating general characteristics. The bikes say DOT4 on the filler caps, as you know. With DOT 5.1 having a higher boring point. For these older bikes, do you have a recommendation?


Morning oilhead1100s1150rt

With ABS you really want to stick to a good DOT4. When it comes to brake fluid the word 'synthetic' is more of a marketing gimmick than anything useful.

Boiling point is kind of a non-issue on the BMW I-ABS systems as the working end (brake circuits) are open to atmosphere so take in moisture easily (that is the reason for the yearly wheel circuit flush recommendation).

Just pick a good name brand Dot 4 brake fluid (from an UNOPENED CAN).

As far as "will need to run the pumps for one lengthy and thorough cycle to flush", that is a start but personally I like to run the servo pump long enough to get good bubble free fluid flow, then close the bleeder screw, then run the servo pump on a closed bleeder to build system pressure, then open the bleed screw & bleed again. This compresses any air remaining in the system & purges it out of the pockets, valves, & pressure switches. I do this a couple of times.


D.R. ___
Sent from my rotory dial wall phone!
#1007208 - 03/12/18 01:45 AM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: May 2012
Posts: 97
oilhead1100s1150rt Offline
Member
oilhead1100s1150rt  Offline
Member

Joined: May 2012
Posts: 97
South East PA
update:

Changed out brake lines to SS
Filled and bled - following BMW shop manual and advise from here- all procedures followed.
Fully charged battery - reading 12.88
ABS still showing failure after roll test
Servo will not start until rear peddle pushed only, no start on front lever initial pull
Servo stays on after rear peddle applied

Sent report to Module Masters I had from Dealer testing - saying most likely internal controller bad.

Will be waiting for MM iABS build to come online........months from now most likely...


Dave
2002 r1150rt | 2003 r1100sa | 1986 k75 -sold
#1007225 - 03/12/18 12:48 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: oilhead1100s1150rt]  
Joined: Feb 2005
Posts: 47
cat0020 Offline
Newer Member
cat0020  Offline
Newer Member

Joined: Feb 2005
Posts: 47
I'm planning to remove the Servo-assist pump, ABS unit on my 02 R1100S when time comes to replace the brake lines.
Likely source a replacement wiring harness and ECU unit, too.


Master your environment, and you will survive just fine.
Chances favor the prepared mind.
#1007226 - 03/12/18 01:10 PM Re: 2003 r1100s ABS failure 2x in 4K miles [Re: cat0020]  
Joined: Jun 2010
Posts: 14,521
dirtrider Offline
The Oracle
dirtrider  Offline
The Oracle
Member

Joined: Jun 2010
Posts: 14,521
Ohio
Originally Posted by cat0020
I'm planning to remove the Servo-assist pump, ABS unit on my 02 R1100S when time comes to replace the brake lines.
Likely source a replacement wiring harness and ECU unit, too.



Morning cat0020

It will take more than an ECU & wire harness to go that direction. The dash instrument panel (probably just the electronic speedometer) is different on the non ABS 1100S as well as the speed sensor (I'm also not sure that your current final drive will work with the required speed sensor). Your current brake switches probably won't work correctly either.

In any case, it is a LOT easier, quicker, cheaper to just retain the existing ABS speedometer/speed sensor parts & remove the hydro part of your existing ABS controller then build a block-off plate & keep the black box part of your existing ABS unit. That should give you great conventional brakes but keep a functioning speedometer & brake/tail light operation using your current I.P. speedometer.


D.R. ___
Sent from my rotory dial wall phone!
Page 5 of 5 1 2 3 4 5

Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.020s Queries: 16 (0.003s) Memory: 2.7990 MB (Peak: 2.9821 MB) Zlib enabled. Server Time: 2018-10-19 12:13:09 UTC