ABS Problem

Amonra · Post by **Amonra** » Sat Apr 28, 2007 9:47 am

All of a sudden my ABS is acting up.

Whein i put in the key and turn it half way the abs light in the dash goes on and turns off after a few seconds indicating it is ok.
when i then turn on the engine it turns on again and off again after a few seconds.
when i then start moving it turns on again and does not turn off.
i slap on the brakes to test if the abs is still working but it is not.
what is wrong ?
i read somewhere that it could be from some sensors, but where are the sensors located and how do i clean them ?

Thanks

Brasco · Post by **Brasco** » Sat Apr 28, 2007 3:07 pm

Is this the old type ABS? If so, check the connection to your ECU and that it is secure.

(near-side cubby hole in boot)

Amonra · Post by **Amonra** » Sat Apr 28, 2007 4:54 pm

i guess it is the old model as the ABS computer is in the luggage boot inside a small compartment on the left, but i removed the plug and put it back and it's still the same.

robkendall · Post by **robkendall** » Sat Apr 28, 2007 5:04 pm

might be a simple statement, but check that the earth 'pin' in the engine bay isnt loose and touching metal...on and off like....turning the abs on and off.
like i said, simple statement, but it could be.
rgrds
rob

VanDerGraaf · Post by **VanDerGraaf** » Sat Apr 28, 2007 8:42 pm

I've heard of this thing before but I have no idea what it looks like.
Anyone got a pic?

Amonra · Post by **Amonra** » Mon Apr 30, 2007 7:02 am

It is now going on anf off whilst driving. accelerating/slowing down and bumps seem to be triggering it, so im guessing that it's a loose contact of some sort but i dont know where to look apart from the ABS computer scart.

Amonra · Post by **Amonra** » Mon Apr 30, 2007 7:21 am

does the ABS system take some kind of fluid apart from the normal brake luiid ? if so what kind of fluid ? and where ?

Amonra · Post by **Amonra** » Wed May 02, 2007 7:38 am

no one knows where i can find the sensors ?

robkendall · Post by **robkendall** » Wed May 02, 2007 8:31 am

in the engine bay, by the right hand side (looking from the front of the car) theres the box for the diagnostics? somewhere around that theres a little black plastic pin about an inch long? with a metal tip....if you touch the tip to the body it will cycle the abs on/off....i only had it on the silver turbo, and i didnt have that long, so cant exactly remember where....one of the otehrs will though im sure?
anyone?
rgrds
rob

Amonra · Post by **Amonra** » Wed May 02, 2007 5:47 pm

the thing is that i want my abs on. i read somewhere that there are sensors in each wheel connected to the abs computer, so i was thinking that either one of them is busted or they are dirty and need cleaning ? but i just dont know where these sensors are exactly.

martinholmesuk · Post by **martinholmesuk** » Wed May 02, 2007 7:31 pm

end of drive sharfts

there are black sensors and remove wheel and have a look

maybe the ring is dirty which it reads

catgroom · Post by **catgroom** » Wed May 02, 2007 9:09 pm

The sensors are easy to find at the end of their wires.

You can clean the driveshaft rings with a wire brush.

To clean sensors you dont have to unscrew them.I find spraying them with brake cleaner or any alcohol based liquid is best.
Then,take a cotton bud or a piece of rag and floss them,really!

This should sort out the problem.

I had a 1992 with this problem.It turned out to be that the brake fluid was low.Now,you can fill brake fluid much higher than Max mark on the reservoir.Something I picked up from another forum member.

Good Luck!

Steve

Amonra · Post by **Amonra** » Tue May 29, 2007 1:36 pm

cleaned the sensors and filled the brake fluid reservoir to the brim. still not working.
i cant find the plastic pin mentioned.

it's becoming dangerous as when im driving the ABS goes on and off occasionally while im braking and when it does that i have no brakes for s second or two.

Is there some kind of diagonistics test i can run for the ABS computer ?