Residual Brakes & Servo Resets....

[DollyRocket]

My 1150GS 2003 twinspark with servo & ABS has performed a fancy trick on me during the last two wet days (one of them being today) and dropping out the Servo with the 4Hz blinking ABS light and Gen light on indicating that residual braking is active in both circuits.

Curiously, it has done this twice now, both times when i was slowing down from the motorway on a sliproad, when I do manage to stop the system resets itself and powered servo assist braking is restored. (no stopping engine or ignition off resets required).

The only thing I have done recently was to remove the front wheel and abs sensor to paint the fork legs, bolted it all back on and everything has worked fine until last week. if I had damaged the abs sensor on the front wheel I would expect the servo to still run and just knock out the ABS and even that would only be on the front wheel (i.e. ABS light flash @ 1Hz and no Gen light).

The brake light bulb appears OK, but i will change it to be sure - don't think this would affect the servo though (according to the other threads).

Do you think this is an impending sign that the Servo is about to give up? The bike is regularly St. eptoe'd, last one 3000 miles ago. I take it that know-one knows of a remanufacturer of the servo's?

I quite like the servo and would loath to get rid of it but any advice gratefully received.

Mike

 

[sockpuppet]

I take it that know-one knows of a remanufacturer of the servo's?

Timolgra did have one for sale as he removed it from his bike. Other than that I reckon look at a breakers.

I may remove my servo from mine prior to calums road and me attempting to get to south africa so If I do I may sell it.


Richard

 

[Timolgra]

Timolgra did have one for sale as he removed it from his bike. Other than that I reckon look at a breakers.

I may remove my servo from mine prior to calums road and me attempting to get to south africa so If I do I may sell it.


Richard

Yes i do have a servo/abs unit in perfect condition having only done 13k miles.

 

[DollyRocket]

Right - It did it again twice, luckily just outside work, Once at the sliproad and again at the security barrier.

Dropped into residual braking until I stopped, then reset itself. I took the tank off last night and unplugged the servo and checked all the pins were bright and shiny (just in-case), and i thought that may have cured it - but it hadn't.

It only seems to happen when I am moving relatively slowly (i.e. under 20mph, generally just at the last bit).

I suppose I will need to get it hooked up to a fault code reader to see if there are any fault codes logged.

 

[Decster]

Right - It did it again twice, luckily just outside work, Once at the sliproad and again at the security barrier.

Dropped into residual braking until I stopped, then reset itself. I took the tank off last night and unplugged the servo and checked all the pins were bright and shiny (just in-case), and i thought that may have cured it - but it hadn't.

It only seems to happen when I am moving relatively slowly (i.e. under 20mph, generally just at the last bit).

I suppose I will need to get it hooked up to a fault code reader to see if there are any fault codes logged.

There is a reset for the bike where you disconnect the battery terminal for 2/3 secs and then reconnect.......but i am sure more qualified peeps will be on soon to give exact instructions..

 

[Colban]

Not sure about the servo ABS sensors,but the older ABS sensors were shimmed to set the gap correctly.Maybe worth a closer look.
Someone on here posted a while ago about brake light bulbs on servo bikes.
Although the light worked,the bulb loading on the circuit wasn't right.
Fitting a new bulb cured it.

 

[twodogs]

Yes i do have a servo/abs unit in perfect condition having only done 13k miles.

How much would you be looking for to sell timolgra

 

[rockchunk]

my servo and abs went awol recently turned out to be the rear brake light switch dammed stupid system

 

[Timolgra]

How much would you be looking for to sell timolgra

It's like new, £550 so you save £1050

 

[sockpuppet]

Yes i do have a servo/abs unit in perfect condition having only done 13k miles.

I'm do a good job of pimping this out for you. That's 2 referals so far I should start asking for commission

 

[Speedy]

Mine did exactly the same. Cured it by replacing the battery and rear light bulb. Strange but true

 

[DollyRocket]

I have replaced the rear bulb (on Barry Barbers advice as well as knowledgable tossers here) and I will let you know of the outcome.

 

[Ionlab]

Servo is quite sensitive to battery condition. Check your battery voltage as well. I have read somewere that it draws nearly 200W (seems a little bit high). But in slow speeds your alternator cannot produce a full load, so ....

 

[DollyRocket]

One week on - Appears to be OK Obviously it will fail again on the way home now though...

 

[Welshman]

Timolgra did have one for sale as he removed it from his bike. Other than that I reckon look at a breakers.

I may remove my servo from mine prior to calums road and me attempting to get to south africa so If I do I may sell it.


Richard

What you coming to drink some beer with us?

 

[DollyRocket]

Bloody thing has started playing up again. 3 weeks without any issues (after changing the bulb).

Does anyone know if there are fault codes logged that I could get read? or what the normal failure mechanism for the servo is? (if there is a normal failure mode)

Is the servo motor brushless? Maybe it occasionally cannot build the pressure up ?

Mike

 

[Supertech]

I would say get it hooked up to a fault code reader and get the faults earsed. I know this is different, but I've spent days going through the mechanical systems on aircraft, only for the fault to be down to a software issue or fault code stored in a controller memory causing the system to go into fail mode. The same thing has happend to my car.....the annoying thing is that on my car (and bike) there is no fault codes display or soft fault reset button.

While it pains me to consider this but I'm thinking of pulling the servo off my bike. Shame as The BMW abs works well, its just that damn servo, but I'd hate to have to ride a fully laden bike a couple of thousand miles home on residual braking. Can you remove the srvo and keep abs?

If i do I'll be keeping the servo for if I sell the bike.