2006 Lexus GS 300 Owners Manual - Page 447

STARTING AND DRIVING The hill−start assist control system will operate for 5 seconds maximally when all of the following conditions apply. D When the selector lever is in "D" or "S" position D When the brake pedal is not depressed The system is designed to operate when the vehicle is starting on an uphill slope; therefore, if the selector lever is in "P" or "N", it will not operate. It will not operate either if the vehicle starts to move in reverse on a slope with the selector lever in "R". When the hill−start assist control system is operating, you may hear a sound. This indicates the hill−start assist control is operating normally and does not indicate a malfunction. GS430-The slip indicator light comes on when the engine switch is selected in "IG−ON" mode. The light goes off when the engine is started. GS300-The slip indicator light comes on for a few seconds when the engine switch is selected in "IG−ON" mode. If the indicator light does not come on when the engine switch is selected in "IG−ON" mode, contact your Lexus dealer. Keep the following in mind when driving: D The hill−start assist control system operates for 5 seconds maximally. If both the brake and accelerator pedals remain undepressed for longer than 5 seconds, the buzzer will sound at more frequent intervals and the system will gradually stop operating. D The hill−start assist control system is not designed for stopping the vehicle on an uphill slope. When stopping the vehicle, be sure to depress the brake pedal. G31038 "Slip indicator light When the hill−start assist control system is operating, the slip indicator light flashes. At the same time, the stop lights and high mounted stoplight are lit. 423