1999 Lexus GS 400 Owners Manual - Page 325

STARTING AND DRIVING You can turn off the vehicle skid control system by pushing the "VSC OFF" switch. The "VSC OFF" indicator comes on. At this time, the traction control system also turns off. You cannot turn off either one of them. Pushing the "VSC OFF" switch a second time turns the system back on and extinguishes the "VSC OFF" indicator light. When you turn the ignition switch on, this system always turns on. Vehicle skid control system failure warning 31G015-1 These lights warn that when there is a problem somewhere in the vehicle skid control system or traction control system. If the "VSC" warning light and "VSC OFF" indicator light come on, have your vehicle checked by Lexus dealer as soon as possible. The lights will come on when the ignition key is turned to "ON", and will go off after about a few seconds. The lights may come on for 60 seconds after the engine is started. It is normal if they go out after a while. Depressing the brake pedal repeatedly may turn on the lights. It is normal if they go out after a few seconds. Although the "VSC" warning light and "VSC OFF" indicator light come on, there is no problem to continue your driving. 305