1999 Toyota 4Runner Owners Manual - Page 179

4RUNNER ( ) D Avoid high speeds on wet roads. The anti- lock brake system cannot eliminate the risk of hydroplaning and loss of tire friction. Always maintain a safe distance from the vehicle in front of you. Compared with vehicles not fitted with an anti- lock brake system, your vehicle may require a longer stopping distance in the following cases: "ABS" warning light This light comes on when the ignition key is turned to the "ON" position. After a few seconds, the light will go off. When the light is on with the rear differential locked, it indicates the anti- lock brake system will not operate. 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. Type A D Driving on rough, gravel or snow- covered roads. D Driving with tire chains installed. D Driving on roads where the road surface is pitted or has other differences in surface height. D The light does not come on as described above, or remains on. D The light comes on while driving with the rear differential unlocked. CAUTION Do not use tires other than the manufacturer's designated tires, and do not mix tires or wheels of different sizes. You may prevent the antilock brake system from operating at full effectiveness. Vehicles with rear differential lock systemThe anti- lock brake system does not operate when the rear differential is locked. It is normal operation for the "ABS" warning light to be on at this time. D The light does not come on with the rear differential locked. D The light comes on while driving. Type B 179