ABS warning light ON!!!!!!!!!

[szeyee]

Hi, I need some advices and helps here!!!

My car (toyota corolla 1.6 Auto) is having a serious problem on the ABS braking system(at least i think so.. ).

Whenever I drive my car up to 100++(100-120km/h), the ABS warning light will on and it just stay there.

Anyone knows what is the possible problems and how can I solve this problem??

[REN69]

Fill up your brake and ABS fluid containers and see what happens.

[Cavi Mike]

Do you have four of the EXACT same tires on all four corners? Also make sure your pressure is equal in all four. The variation between rotation speeds will throw off your ABS and it will turn off because it thinks there is a problem. It can compensate for navigating turns but, if say your right-front and left-rear tires are bald and low on air pressure, it makes no sense to the computer and, the faster you go the farther off the signals will get.

ABS doesn't know how fast your going, all it knows is the series of on and off signals it gets from a magnetic sensor located at each wheel hub. If there is any discrepancy in size of your tires due to wrong sizing, uneven tread wear, or air pressure, it will multiply the difference between the signals the ABS computer gets the faster you go. This difference in signal is how the computer knows when to relieve brake pressure to whichever wheel is getting a longer pause between on and off, but if you're not hitting the brakes, the computer turns off and you get the ABS light.