2003 Toyota 4Runner Owners Manual - Page 243

'03 4Runner_U (L/O 0208) "ABS" warning light The light comes on when the ignition key is turned to the "ON" position. If the anti- lock brake system and the brake assist system work properly, the light turns off after a few seconds. Thereafter, if either of the systems malfunctions, the light comes on again. When the "ABS" warning light is on (and the brake system warning light is off), the following systems do not operate, but the brake system still operates conventionally. Type A "VSC TRAC" warning light may come on with the "ABS" warning light (brake assist system warning light) when there is a malfunction somewhere in the anti-lock brake system (brake assist system). If either of the following conditions occurs, this indicates a malfunction somewhere in the parts monitored by the warning light system. Contact your Toyota dealer as soon as possible to service the vehicle. D The light does not come on when the ignition key is turned to the "ON" position, or remains on. D Anti-lock brake system D Traction control system (two-wheel drive models) D The light comes on while you are driving. A warning light turning on briefly during operation does not indicate a problem. D Active traction control system (four-wheel drive models) D Vehicle skid control system D Downhill assist control system (four-wheel drive models) D Hill-start assist control system When the "ABS" warning light is on (and the brake system warning light is off), the anti-lock brake system does not operate so that the wheels will lock up during a sudden braking or braking on slippery road surfaces. Type B 2003 4RUNNER from Aug. '02 Prod. (OM35795U) 243