1100 ABS Pump dead ?

[Grazoid]

Okay, this may have already been answered but my search so far in the forum has shown up nowt.

Filled up after work on Wednesday due to the novelty of 97p a litre and rode home okay.

Thursday fired up and the ABS lights started flashing, which I put down to several short journeys with lights on draining the battery slightly. rode for a few mins and stopped to reset. Turned off and what I initially thought was the fuel pump kept going with the ignition off.

Tried to stop it by pulling fuses and relays but kept going. Ended up disconnecting the battery and it stopped. Noticed that the vibes seemed to be coming from the bike... not the tank so safe to assume it is something to do with the ABS.

I have heard that the ABS pump relay can stick on , so ordered a used one from Motorworks and gave the bike a check today while awaiting delivery.

Reconnected the battery and the alternate light routine started but no sound of a whining pump. Tried the 90 second reset and the lights still did the alternate flashing thing.

As I don't have access to a the test tool dunno what to check next

Battery voltage is 12.7v so no issues there. fluid levels are okay , and no spongyness prior to this.

If I do have to replace the relay at the pump what need to be watched for or is it a straight plug-in job or will I have to rewire the connections?

 

[Grazoid]

Well thanks for all your input ... not... or is the 75 views peeps with the same issue !

Any advice gratefully received!

 

[MMC]

Would have guessed the whining pump is actually the fuel pump rather than the ABS...

Sounds like similar symptoms to my 1100 gave when the starter motor had lunched its magnets and was about to give up.

 

[Grazoid]

Would have guessed the whining pump is actually the fuel pump rather than the ABS...

Sounds like similar symptoms to my 1100 gave when the starter motor had lunched its magnets and was about to give up.

Ignition turned off loadsa noise still and fuel pump disconnected both by pulling the relay , snap connector and removing the tank.... still making noise - disconnected battery...stopped.

 

[MMC]

S'fecked mate. I'll give you £150 for it

Seriously, I'm out of my depth on this one, sorry mate...

 

[davegs]

ABS relay

I am sure (on 1150s anyway there is another rel;ay inside the abs uniot I've seen deatils somwhere but can't find where. Mine packed upages ago and I just took out the relay from the fuse box, but one light still flashes and it seems to be a relay in the unit but as I say cant find details of it. Have a
look on " BOB's BMW" site they do split diagrams on all parts and systems and there might be somthing on there.
dave (I hate christmas) GS

 

[Grazoid]

I am sure (on 1150s anyway there is another rel;ay inside the abs uniot I've seen deatils somwhere but can't find where. Mine packed upages ago and I just took out the relay from the fuse box, but one light still flashes and it seems to be a relay in the unit but as I say cant find details of it. Have a
look on " BOB's BMW" site they do split diagrams on all parts and systems and there might be somthing on there.
dave (I hate christmas) GS

I have identified the second relay , but until I got a second hand one from Motorworks the other day was puzzled as how to remove it.

I am just going into the garage... I may be some time... or not as the case may be....

 

[Seamaster]

Go down to your local dealer and get them to put the bike onto there test rig, I did this when I had a problem, the pistons had siezed which required a new pump. At this point I gave the bike to Steptoe to sort out as I could not find £1100 for a new pump.

 

[Grazoid]

1100 quid for a new pump! or 1100quid fitted ?

 

[ELIMINATOR]

Hang on.. ABS pump? 1100? news to me, 1150 sevro braked bikes have a pump, didn't think 1100s had pumps???

 

[Grazoid]

Hang on.. ABS pump? 1100? news to me, 1150 sevro braked bikes have a pump, didn't think 1100s had pumps???

AFAIK all ABS has a pump of sorts to decrease and increase pressure in the system ... which is how it all works.

 

[motobiker]

AFAIK all ABS has a pump of sorts to decrease and increase pressure in the system ... which is how it all works.

Absolutely right... its not exactly a small gadget either - bottom of the page. in bmw speak - the 'pressure modulator' - http://www.xmission.com/~wendell/R1100GS/brakes.html

The servo wotsit is something else entirely

 

[Grazoid]

Well after trying the multitude of reset advisories on this here site ... and still trying to work out how to remove the servo on the current ( as tony said) modulator I was wondering if one of the ABS/Motronic testers I see on e-bay from Germany would be worth while ?

Talking about these Evil-Bay Link

Any one bought/used one before ?

 

[Grazoid]

Also if I have to replace the pumps with a second hand unit ... is it much of a job.... ?

 

[DrFarkoff]

What happens if you pull the blue relay in the fusebox does it stop whirring?
There's an easy way around this if you're sure it's the ABS pump and you don't want to use it?????

The ABS II system is a direct connection hydraulically between the handlebar lever and front callipers and seperately the foot pedal to the rear brake calliper

If you want to electrically disconnect permanently just take the big multiplug off the side of the block! NOTE this is applicable to ABS II only!!!

NOT Integral / servo ABS i.e. the one that whines under the tank when you pull the lever or push the pedal!

The main power and sensors run in through that block and provided you don't have a leakage the brakes should function as a normal motorcycle BUT without any ABS function

If you do go for a disconnect seal the connector in a plastic bag and tape it up well

Check the Brake lamps are working before you go too far! they are not wired thru the ABS system unlike the servo jobbies

The big Job replacing the unit is matching it! and bleeding it thru
For whatever reason there seems to be a difference in pins used (in the connector block) in varying models!

 

[Grazoid]

What happens if you pull the blue relay in the fusebox does it stop whirring?

The lights stopped flashing... well they would it's the relay for the warning lights

Stpopped after I disconnected the battery. Left for a couple of days and tried the reset ... still got the flashing lights.

There's an easy way around this if you're sure it's the ABS pump and you don't want to use it?????

The ABS II system is a direct connection hydraulically between the handlebar lever and front callipers and seperately the foot pedal to the rear brake calliper

If you want to electrically disconnect permanently just take the big multiplug off the side of the block! NOTE this is applicable to ABS II only!!!

NOT Integral / servo ABS i.e. the one that whines under the tank when you pull the lever or push the pedal!

The main power and sensors run in through that block and provided you don't have a leakage the brakes should function as a normal motorcycle BUT without any ABS function

If you do go for a disconnect seal the connector in a plastic bag and tape it up well

Check the Brake lamps are working before you go too far! they are not wired thru the ABS system unlike the servo jobbies

The big Job replacing the unit is matching it! and bleeding it thru
For whatever reason there seems to be a difference in pins used (in the connector block) in varying models!

Hmm... bleeding through, no issue with that always done all my own hydraulic work since having a set of recently dealer "serviced" brakes fail due in 1979, on the basis my life depends on them and 30 years later still get niggling back pain from damage I sustained.

But the matching, think you need the diagnostic unit for that... and there is a 1997 ABS unit up for sale at a breakers quite close to a mate of mines darn sarf...

 

[DrFarkoff]

But the matching, think you need the diagnostic unit for that... and there is a 1997 ABS unit up for sale at a breakers quite close to a mate of mines darn sarf...

Diagnostocs No these are antiquated units now and providing you get a year for year R series for R series unit with the same part number or contact Motorowrks or some of the usual suspects and they may be able to give you if it's a suitable unit!

Only the Servo ABS units are linked to the bike wia chassis number encoding done at the factory

I know this because I had to change a couple whilst with the dealership and had to wipe the chassis numbers and re encode them before releasing the bike for use!

What a whingin match that was It took like all of 15 minutes and the jobs over and done with CORRECTLY, so there'd be no queries if the bike was anywhere but here.

Anyway all these old ABS II systems are totally independant and just monitor the wheel speeds and rates of deceleration and activate when the wheel decelerates faster than an allowable value, it's jsut the pin usage that causes grief between K and R "I think!"