Indications of impending ABS failure ??? - BMW Luxury Touring Community
 3Likes
  • 1 Post By Wazza
  • 2 Post By microdoc
 
LinkBack Thread Tools Display Modes
post #1 of 14 Old Jun 25th, 2019, 9:35 am Thread Starter
ian
Junior Member
 
Join Date: Jan 2006
Location: Johannesburg South Africa
Posts: 29
Indications of impending ABS failure ???

Took a ride on my facelift 2004 and stopped at my destination after half an hour.
When I got back ten minutes later the ABS light initially started flashing slowly as it does and as I drove off instead of switching off, started flashing fast. The brake booster servo was not working and I stopped and switched off the ignition - first time I restarted it continued flashing fast and then second time heard the wining sound as the booster servo kicked in and the light went off.
All was fine for the balance of the ride.
Any suggestions or thoughts would be appreciated.
ian is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old Jun 25th, 2019, 11:19 am
Junior Member
 
Join Date: Mar 2005
Location: , , Scotland
Posts: 16
I don't know if your servo is failing but I hope you don't have to take the bike to bits to get it checked like I am currently going through as you can see from the photo. The servo is at the top left of the photo sitting on the floor waiting to be packaged up and sent for testing.
Attached Thumbnails
Click image for larger version

Name:	20190619_183528_1561475759099.jpg
Views:	94
Size:	734.5 KB
ID:	152879  
albamoto is offline  
post #3 of 14 Old Jun 25th, 2019, 7:34 pm
Senior Member
 
Join Date: Dec 2017
Location: Brisbane Australia
Posts: 311
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by albamoto View Post
I don't know if your servo is failing but I hope you don't have to take the bike to bits to get it checked like I am currently going through as you can see from the photo. The servo is at the top left of the photo sitting on the floor waiting to be packaged up and sent for testing.
Your wife must be very understanding allowing you to pull the bike apart in the loungeroom like that.
bmwcoolk1200 likes this.
Wazza is offline  
 
post #4 of 14 Old Jun 26th, 2019, 4:09 am
Junior Member
 
Join Date: Mar 2005
Location: , , Scotland
Posts: 16
😀 yes looks like that but she is not that understanding, Old carpet on garage floor to catch the various drips from any leaking fluid.
albamoto is offline  
post #5 of 14 Old Jun 27th, 2019, 7:31 am
Senior Member
 
Join Date: Mar 2004
Location: near Cleveland, OH, USA
Posts: 357
Re: Indications of impending ABS failure ???

Before assuming the worst, check the brake fluid levels in both reservoirs.
DanDiver and cws like this.
microdoc is offline  
post #6 of 14 Old Jul 5th, 2019, 6:34 am Thread Starter
ian
Junior Member
 
Join Date: Jan 2006
Location: Johannesburg South Africa
Posts: 29
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by microdoc View Post
Before assuming the worst, check the brake fluid levels in both reservoirs.
I think I like your answer best LOL
Will do so and revert
ian is offline  
post #7 of 14 Old Jul 5th, 2019, 11:31 am
Wrencher Extraordinaire
 
jzeiler's Avatar
 
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,348
Re: Indications of impending ABS failure ???

Also a weak battery can cause a temporary fault like what you had. To confirm try several hard stops in succession and see if it returns. This will load a weak battery down.

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

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  
post #8 of 14 Old Jul 15th, 2019, 10:28 am Thread Starter
ian
Junior Member
 
Join Date: Jan 2006
Location: Johannesburg South Africa
Posts: 29
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by microdoc View Post
Before assuming the worst, check the brake fluid levels in both reservoirs.
The left brake reservoir was indeed low and in fact topped up both. The light has not come on again.

Could there be a leak - what should I be looking out for?
ian is offline  
post #9 of 14 Old Jul 15th, 2019, 9:42 pm
Senior Member
 
mr1150gs's Avatar
 
Join Date: Feb 2005
Posts: 319
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by ian View Post
The left brake reservoir was indeed low and in fact topped up both. The light has not come on again.

Could there be a leak - what should I be looking out for?
You can check for leaks but you should also check your brake pads as they could be worn enough to keep the pistons pushed out further.

"If at first you don't succeed... well, so much for skydiving."

BMWMOA - #47511
2015 F700GS - For my better half whenever I'm not using it!
2007 K1200LT - Nice now!
2003 R1150GS -Black Beauty (sold)
2006 K1200LT - Blue Baby (sold)
2003 R1150GS - Yellowbird (sold)
1981 R100CS - Sadly gone
1991 K1100RS - Sold and burned
1986 K100RS - In the past
mr1150gs is offline  
post #10 of 14 Old Jul 16th, 2019, 9:54 am
Wrencher Extraordinaire
 
jzeiler's Avatar
 
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,348
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by ian View Post
The left brake reservoir was indeed low and in fact topped up both. The light has not come on again.

Could there be a leak - what should I be looking out for?
You said the left reservoir, was it one of these on the ABS ? These are the only reservoirs that are monitored. Also on the face lift these sensors only fire off when the pads are very worn.
Attached Thumbnails
Click image for larger version

Name:	ABS Con.jpg
Views:	35
Size:	92.3 KB
ID:	153419  

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

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  
post #11 of 14 Old Aug 26th, 2019, 5:21 am Thread Starter
ian
Junior Member
 
Join Date: Jan 2006
Location: Johannesburg South Africa
Posts: 29
Re: Indications of impending ABS failure ???

Yip not so straight forward - the problem is still evident.
Many posts reflect and upgrade to braided hoses - may I ask why or what's prompting it ?
She's just been for service so assumed the pads were ok but you know what the say : ass - u - me !!!
ian is offline  
post #12 of 14 Old Aug 26th, 2019, 5:23 am Thread Starter
ian
Junior Member
 
Join Date: Jan 2006
Location: Johannesburg South Africa
Posts: 29
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by jzeiler View Post
You said the left reservoir, was it one of these on the ABS ? These are the only reservoirs that are monitored. Also on the face lift these sensors only fire off when the pads are very worn.
The Reservoirs on the handle bar was what I was referring to ?
Now i'm totally confused ???
ian is offline  
post #13 of 14 Old Aug 26th, 2019, 7:37 am
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,188
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by jzeiler View Post
You said the left reservoir, was it one of these on the ABS ? These are the only reservoirs that are monitored. Also on the face lift these sensors only fire off when the pads are very worn.
That picture looks familiar.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #14 of 14 Old Aug 26th, 2019, 7:47 am
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,188
Re: Indications of impending ABS failure ???

Quote:
Originally Posted by ian View Post
The Reservoirs on the handle bar was what I was referring to ?
Now i'm totally confused ???
You earlier said the “left” reservoir and there is no left brake reservoir on the handle bar. The left handlebar reservoir is for the clutch. Since you said “facelift” 2004, I am assuming you mean your bike has the iABS like my 2007. If that is the case, there are four brake fluid reservoirs, one for each brake circuit on the LT. These are: Front and rear control circuits and front and rear wheel circuits. The front control circuit reservoir is with the master cylinder on the right handle bar. The rear control circuit reservoir is under the seat on the right side of the bike and is cylindrical with a screw on cover. The two wheel circuits are on top of the ABS module as shown in the picture that John posted, which I think is of my LT from the looks of it. Ignore the red arrow as that is pointing to the ABS electronics connector. Look at the funnel which is, I believe, in the near side reservoir. I would have to look up now which is front and which is rear, but one is also taller than the other.

The fluid levels in the control circuits are not monitored, only the levels in the wheel circuits on top of the ABS module. The caps on these have breather hoses attached to them. Before you remove the caps to check or add fluid, THOROUGHLY clean all of the areas around and above the cap (subframe, wiring harnesses, etc.). I blow mine off with compressed air, then wash with soap and water and gently rinse (no pressure washers), let dry, and then blow one more time with compressed air. You want this area operating room clean before you remove the reservoir caps.

This is much more work, but the best way to fill these is to fully compress the brake pads in all calipers, use the funnel provided by BeamerBoneYard (I cut mine and added clear plastic hose as I could not get it aligned as it came) and then fill the reservoirs until the level is just below where the bottom of the cap will fit when screwed back in. If you do that, you will have enough fluid to completely wear out the pads and not trigger a low fluid level. Any less fluid, and you risk alarms as the pads wear down. If you don’t compress the pads and fill the reservoirs, then next time you compress the pads, you will make a mess when you push the excess fluid out of the ABS module when you compress the caliper pistons.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome