ABS system showing "brake failure" indication

[haydw]

I had an issue with my 06 ADV servo- no pressure at the rear- not even residual. I tried the 2nd hand route as the part number for the servo is the same across the GS, RT, RS, K1200S range. I got a 2nd hand one from a K1200R and Roy at RGM fitted it- it didn't work. I then got a 2nd hand one from motorworks and it was damaged in transit.

Roy had all sorts of problems getting it to work- apparently after consultation the ABS unit takes its programming from new from the main ECU to tell it pressure settings etc and it is then hard coded and he couldn't overide it.

I ended up forking out for a new one (£1400+) and all has been well since. Its not something I want to happen again thats for sure. The bike was 2 years out of warranty, bought private sale and I do my own servicing. There was no way I was going to get a GOGW.

 

[coolrider]

As part of the process, was your battery replaced/fully charged?
What else was done?
What was the history of your particular problem?




I'm not questioning that you changed the abs unit and you've not had the problem since, but that doesn't necessarily mean that the problem WAS the ABS unit.

Without a whole history, it's impossible to say, but your post sounds like a bit of an extreme reaction and probably something that 99% of the reported problems are nothing to do with

Keep it simple and work up from the cheapest/most likely cause......going for an ABS unit change is a bit like going for heart replacement surgery because you have a cold, then reporting that your new heart solved the problem when in fact it was the antibiotics given as part of the process that knocked out the cold , if you see what i mean

I can understand your point of view.
If ever you checked the history of this discussion, I think I did whatever simple thing can be done starting from cleaning the terminals in the connectors, try other battery, flushing the systems twice. Problem was still there in a very consistent fault code. Then, the ABS itself become the suspect.
Don't generalize brake failure warning as ABS unit problem. This is a specific issue of these fault code:
#Integral ABS 2 - CAN
24048ower Supply to Pump motor faulty
24049ower Supply to Pump motor faulty

 

[Congceng]

I bought a used unit from a similar bike year. In my case, it didn't need programming. It was plug and play.
But, I've heard some reports that it doesn't always work that way. May be I was just lucky because I got it from a GS which bike year similar as mine.
R1200RT also has similar ABS unit.
Is it the bike model which needs to be similar or both model and year needs to be similar. I don't really know.
Regarding new ABS unit, a BMW mechanic told me it should be plug and play, but luckily I don't have a chance to do it.
Don't you have an BMW authorized dealer nearby?

Thanks a lot! I believe my pump motor of ABS Unit is failed and the electric controller is good! I will try to bid a pump from eBay and connect with the controller, hope it will be workable! I will update the repair result afterwards.

 

[fizzer]

well i was at an autojumle in york a few months ago ,and their lying amongst a load of gs bits in a box was an abs unit ,it was raining and the bloke looked fed up ,looked like he just wanted to go home,so i bid him on the unit (JUST IN CASE YOU NEVER KNOW) ,so its sat in a bag in the cubord in my shed in case that day ever comes along.

 

[Deleted account 220522001]

2007 R1200RT. Red Brake failure light when bike is moving. Bike has not been ridden in three months. Battery is ok. Brakes work

Now..I remember I had this issue a few years ago after not using the bike for a few months

Can anyone remind me what the problem is likely to be?

 

[Steptoe]

2007 R1200RT. Red Brake failure light when bike is moving. Bike has not been ridden in three months. Battery is ok. Brakes work

Now..I remember I had this issue a few years ago after not using the bike for a few months

Can anyone remind me what the problem is likely to be?

The problems are different depending on what abs system you have- servo/abs or just abs. A 2007 bike could be any one of those.

 

[Deleted account 220522001]

its a non-servo ABS model

 

[DrFarkoff]

its a non-servo ABS model

Maybe rusty rings

Does the ABS light illuminate only when the bike gets over say 10mph 30 mph 55mph ??

Or does it come on as soon as you switch on the ignition ??

If it is the latter then I suspect sticky brushes not "showing" a circuit to the ECU and immediate brake failure

If its the speed thing sensors may need a clean as rust distorts the wave for the ECU

 

[Deleted account 220522001]

red "brake failure" light comes on when the engine starts, light continues to be on when bike is moving

 

[DrFarkoff]

Perhaps better to get that code read

My experience of a sticking brushes was an Immediate ABS fail lamp "on" as it was part of the ABS / Body control module's routine to self test themselves and connections

It may just be a low voltage warning ? ABS II used to do this

You could try starting with a set of jump leads on a non running car or a spare decent battery ?

If it does not come on when you start the motor whilst hooked up to extra juice ?? I would say the battery is not in tip top condition and is the likely source of the issue

 

[Steptoe]

red "brake failure" light comes on when the engine starts, light continues to be on when bike is moving

Can I play the game of drip feeding as little information as possible———- what happens when you turn the ignition on, but before the “engine starts”.

 

[Deleted account 220522001]

with the ignition ON but the engine OFF....i get the red flashing "brake failure" light

 

[DrFarkoff]

with the ignition ON but the engine OFF....i get the red flashing "brake failure" light

Right your pump ABS brushes are likely stuck back in the holders and not completing the circuit!

Hence ABS failure light is on "BUT" you need the Fault codes read to check that is actually the case

Thanks Steptoe I forgot about that game on here!!!

 

[Deleted account 220522001]

how do i "release the brushes"?

i seemed to recall when i had this issue before it went away of it's own accord

 

[DrFarkoff]

how does i release the brushes?

i seemed to recall when i had this issue before it went away of it's own accord

It could be engine vibration, bumping on the road, shocked them loose Simple as that

 

[Deleted account 220522001]

where exactly is the pump thingy? could i just tap it with a hammer?

 

[Deleted account 220522001]

are these things the "brushes"?

 

[NeilH]

Yes, they normal stick hence the ABS gives an error code.