FAO of Sven or anyone with any knowledge of ABS systems

[beeson100]

Not been on here much, so I hope everyone is doing ok.

I've addressed this to you Sven as I know you seem to know about this sort of thing

The other day when driving home from work my ABS system decided to start working every time I pressed the brake pedal and the pump could be heard working too. Towards the end of the journey the hand brake light came on.

I left the car on the drive for a while and then went back out to test it again and this time the ABS light stayed on but no handbrake light. After driving a few metres the light went out, but the ABS still kept cutting in.

For now I've just disconnected the two rear sensors which has stopped the pump from working and obviously the ABS light is on permanently now.

My first question is does disconnecting the two rear sensors completely overide the whole system, or do I risk locking up the rears in the event of heavy braking?

And secondly, does this sound like the sensors are giving an incorrect signal or the ABS control unit itself?

Apart from this the Marea has been pretty trouble free for ages so I was expecting something to go wrong sooner or later.

Many thanks in advance.


John

 

[Ned]

One ABS sensor not connected or faulty will cause the system not to work. Mine has the same symptoms , I just havnt got round to finding the problem. I found that the rears will lock up at heavy braking at low speeds, but then the fronts will lock up at higher speeds (60mph) at heavy breaking. This is because theres no compensator.

 

[Tom]

Diag time.

 

[Sven]

Like Ned said and like Tom said. Some thing is causing a wrong signal - it can be the sensors, or the rings on the shafts, or some metal particles on the sensor head, its really hard to say from the top of the head.

You can keep driving but the abs/ ebd will be turned off. Get a diag done.

Members Site ---------My Site

 

[beeson100]

I thought as much but i just wanted to check before forking out 30 odd quid for a diag. Can't say I've missed it so I'll get it sorted as and when.

Thanks for the help.

John