This light comes on when the ignition key is turned to the "ON" position. The light will go out after about a few seconds.
If any of the following conditions occur, it will indicate a malfunction somewhere in the parts monitored by the warning light system. Contact your Toyota dealer as soon as possible to have the vehicle serviced.
The light signal does not turn on as described above or remains on.
The light signal comes on while driving.
Even if the anti-lock braking system fails, the brake system will still function normally. However, if the "ABS" warning light is on (and the brake system warning light will be turned off), then the anti-lock brake system does not assist the brakes, so the wheels may lock during hard braking or when braking on slippery road surfaces. Have the vehicle checked by Toyota dealers as soon as possible.
[The material is republished from an online website toyotaman]