Possible Abs Problem

[flyeris]

Hi,

I wanted to inquiry regarding one problem, which I am having for a few months now. Generally I have two problems:

1) When approaching slowly to full stop while braking sometimes ABS activates without reason

2) When pulling off slowly usually traction control activates and limits throttle

So, I thought I might have problems with ABS sensors. I have ordered USB cable with Techstream software out of interest to try to debug the problem :) I have tried to read the sensors data while driving slowly and I got readings, which I expected - if driving slowly, both front sensors read 0s and while driving faster, the readings front and back are the same.

Has anybody had a similar problem? What could be the reasons behind and how to solve it? I have recently changed a wheel bearing in one of the front wheels, but the problem hasn't changed. I suppose the technician hasn't checked the ABS sensors. Are they hard to remove?

I have found a guide on other forum helping to solve a similar problem on other car:

http://forums.trailvoy.com/showthread.php?p=1179929

Thanks,

Jonas

[ColinBarber]

it sounds like the sensors aren't installed correctly - too far away from the rotor on the hub or there is something covering them.

When the wheel is rotating slowly the voltage from the sensor is very low, if the sensor isn't close enough then the voltage is too low for the ECU to detect. Only when it gets to a certain speed does the voltage increase enough to be detected.

Also check the connectors for corrosion, however I wouldn't expect both to have a problem at the same time.

The sensors themselves could be partially faulty, but again wouldn't expect both the fail at the same time.