is there a speed under which abs doesnt cut in ? had a play with it this mornin in the cul-de-sac and wasnt cuttin in all the time. when i had a bit of speed - say 20mph, it cut in faultlessly...

 

If you apply the brake above 10 - 15 MPH on ice and snow the abs system will operate, it holds in until about 4-5 MPH (otherwise the car would never stop) So on ice and snow the usual precautions are required, minimal use of Accelerator, Keeping in a higher gear to reduce potential wheelspin and very little or no brake usage in otherwords drive as the conditions allow.

 

it cuts in on mine even at 2-3 mph and keeps working till it the car stops if on ice or snow!!!

 

ABS generally will not operate below 5 mph as the wheel speed sensor signals are very weak at low speed which makes them very difficult to interpret (by the ECU that is). Unless the car is a cocky swine and uses Hall Effect wheel speed sensors rather than AC inductive pickups - but these are generally vehicles that have a need for low speed ABS such as those equipped with hill descent systems (freelander and new Landcruiser MY03).