Ive got a '99 1.8T sport A3. In the last week ive noticed the ABS yellow light comes on the dash occasionally. I havent checked the book yet to
see if this is a dual warning light for ABS and/or brake pads. A couple of times when ive pressed the brake pedal at low speeds, and defo not under
skid conditions, the ABS has kicked in momentarily. Doesnt do it all the time.
Anyone know likely cause? Would worn pads cause it? Im wondering if it may be something like a sensor plug or dirt / water affecting a sensor.
Cheers,
Darren.
My calibra did the same it was down to a faulty sensor thogh I never got round to replacing it .
I had this on my A4. It started intermitent and then quickly got worse.
In my case the light didn't come on until I started moving.
It turned out that I had the car serviced and (as ever) it needed one of the front suspension parts replacing (ongoing A4 design fault/feature).
Anyway they hadn't reattached the cable into its proper clipy place on the macpherson strut. The wheel had worn through the wire which meant
that the sensor wasn't telling the ABS unit whether the wheel was rotating....
It was an easy fix with a bit of flex, a bit of soldering, some shrink wrap and a lot of amalgamating tape. I don't bodge brakes (too important)
but it was very simple wiring, the warning light is there, and I try to avoid using the ABS anyway!
I drove it like that for 30k and sold the car. I decided that it was as good as the Audi solution. The part is only about £30 but is not nice to
fit.
It might be worth a quick look. As this is a very locost solution. You can probably see the front ones on full lock.
Matt
Hi Darren
Had same problem on my Octavia (same brakes etc as Audi) and it was the brake pad sensor connector had broke.
D.
Usually the ABS sensor ring on one of the driveshafts. They corrode through and slip giving the wrong reading for that wheel and trigger the ABS.
Check for a break in the ring.
Alternative is a sensor but, in most cases, that'd usually leave the light on and stop the ABS operating. Check the resistance of each sensor and
replace the one thats different from the rest.
adrian
ps. ABS light isn't shared with anything else.
Yes ditto above most probably front ABS rings -- manufacturers changed to shrunk on ABS rings rather than the previous type which was machined into
the CV joint ans a result rust forms between the ring and the cv joint andthe ring breaks.
You can now get replacement rings that are easy to put on -- but shop around Internet prices vary enormously, some suppliers are ripping buyers
off,
[Edited on 18/11/09 by britishtrident]
quote:
Originally posted by britishtrident
You can now get replacement rings that are easy to put on -- but shop around Internet prices vary enormously, some suppliers are ripping buyers off,
[Edited on 18/11/09 by britishtrident]
Warm up and drop on, the only important bit to clean up the CV joint before you fit them, often the cv joints are so badly rusted it needs a smear
of Loctite to hold the ring in place.
Makes the job a lot easier no major stripping in involved.