Brake woes.

iwantone · Apr 28, 2013

Have the 'ABS light won't go out problem'. Also have the problem that the light will go out but, that then causes a BIG scare;

Now, the light is normally always on & brakes work well but, occasionally it goes out. When this happens there appears to be no pedal movement & there's a terrible grating noise & 'scratchy' feeling in the pedal & no brakes. If I come off the brake & press it straight away there is normal pedal movement & feeling.

I've replaced all 4 callipers, discs & pads & still have the problem. It's bloody frightening when it happens.

Any ideas?

Dippypud · Apr 28, 2013

iwantone said:
Have the 'ABS light won't go out problem'. Also have the problem that the light will go out but, that then causes a BIG scare;

I've replaced all 4 callipers, discs & pads & still have the problem. It's bloody frightening when it happens.

Any ideas?

We'll do a one-at-a-time thing...

Have you re-seated your ABS sensors at the wheels?

Dippypud · Apr 28, 2013

As I have to go out ...

here goes -
crawl under disco

find sensor (it is a round tube at the top of the hub, not on the brake caliper), it has a black tube coming out from it that holds the wires that go back to the ABS unit under the bonnet.
You should only have two flexible tubey things leaving the brake area... the brake hydraulic line and the ABS wire.

push down on the sensor until it stops moving, next time the disco gets driven, the sensors will be moved to have the proper gap...

nrgserv · Apr 28, 2013

blink code test it to find out why its on.
guess you'll have a broken wire on a wheel sensor. (front nearside if you want a total guess!)
http://www.landyzone.co.uk/lz/f8/disco-1-300-tdi-abs-diagnostics-headache-117078.html

iwantone · Apr 28, 2013

Thanks for the replies

. I'm guessing that the mechanics would have had to reseat the connectors when putting everything together so, dodgy wiring sounds about right. Next time it's dry & I'm having a good day I'll have a poke around. Is it a wheel off job?

iwantone · Apr 28, 2013

I'd looked through your post a few weeks ago mate

. What kinda stumped me was the pedal going really hard and the grating feel and what's actually happening at that time.

nrgserv · Apr 28, 2013

iwantone said:
I'm guessing that the mechanics would have had to reseat the connectors when putting everything together

what arent you telling us

re light being on, blink code test will tell you.

iwantone · Apr 28, 2013

nrgserv said:
what arent you telling us

re light being on, blink code test will tell you.

Not sure what you mean?? Will look into the blink testing.

nrgserv · Apr 28, 2013

iwantone said:
Not sure what you mean?? Will look into the blink testing.

look on link i sent above.
explains blink code test.

iwantone · May 2, 2013

Thanks for the feedback. Fiddled about with sensors on both front hubs and light went out as it should. Didn't really feel as if they moved much though? However, the no movement of the brake pedal reared its ugly head. Interestingly, when I feathered the pedal it would then brake as normal but, the light came back on. Looks like new sensor(s) needed.

SpaceDawg · May 2, 2013

Same problem I had with mine and it was a sensor. The breaks were a lot better without ABS.

iwantone · May 3, 2013

How easy/difficult is it to replace the front sensors? DIY or professional?

Brake woes.

iwantone

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Dippypud

Never Knowingly Understood

Dippypud

Never Knowingly Understood

nrgserv

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iwantone

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iwantone

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nrgserv

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iwantone

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nrgserv

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iwantone

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SpaceDawg

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iwantone

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