torsion bar and mcpherson
check the website how stuff works. they always have killer animation of how stuff works.
Which time? Most problems occur with a damaged/bad sensor. Most times on the passenger side front tire. Best have it scanned (at auto zone or some place like that) and they will tell you exactly what is wrong.
i own a repair shop,and on what kind of vehicle ,i get them in all the time with lots of problems ,just about every vehicle made gives some kind of problems with anti locks from one time to another,good luck.
Most of the time it is a wheel sensor that has gone bad, or just picked up to much metal from the brake pads and rotors. They have a magnet inside of them and eventually go bad. Also depends on what kind of car.
