iwantone

Active Member

• Apr 28, 2013

• #1

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

Never Knowingly Understood

Full Member

• Apr 28, 2013

• #2

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?

Click to expand...

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

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

 

Dippypud

Never Knowingly Understood

Full Member

• Apr 28, 2013

• #3

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

Well-Known Member

• Apr 28, 2013

• #4

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

Active Member

• Apr 28, 2013

• #5

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

Active Member

• Apr 28, 2013

• #6

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

Well-Known Member

• Apr 28, 2013

• #7

iwantone said:

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

Click to expand...

what arent you telling us

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

 

iwantone

Active Member

• Apr 28, 2013

• #8

nrgserv said:

what arent you telling us

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

Click to expand...

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

 

nrgserv

Well-Known Member

• Apr 28, 2013

• #9

iwantone said:

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

Click to expand...

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

 

iwantone

Active Member

• May 2, 2013

• #10

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

Active Member

• May 2, 2013

• #11

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

 

iwantone

Active Member

• May 3, 2013

• #12

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