1998 Lexus SC 300 Owners Manual - Page 191

STARTING AND DRIVING You can turn off the traction control system by pushing the "TRAC OFF" switch. The "TRAC OFF" indicator/ warning light will then come on. Pushing the "TRAC OFF" switch a second time turns the system back on and extinguishes the "TRAC OFF" indicator/warning light. You may hear a slight clicking noise in the engine compartment when the engine is started. This means that the traction control system is in the self-check mode, and does not indicate malfunction. When the traction control system is operating, you may feel vibration of your vehicle, caused by operation of the brakes. This indicates the system is functioning properly. When getting the vehicle out of mud or new snow, etc. the traction control system will help operate to prevent the wheels from spinning. Traction control failure warning If the "TRAC OFF" indicator/warning light flashes, contact your Lexus dealer as soon as possible. There may be trouble in the traction control system. CAUTION Under certain slippery road conditions, full traction of the vehicle and power to the rear wheels cannot be maintained, even though the traction control system is in operation. Do not drive the vehicle under any speed or maneuvering conditions which will cause the vehicle to lose traction. In situations where the road surface is covered with ice or snow, your vehicle should be fitted with snow tires or tire chains. Always drive at an appropriate and cautious pace. 174