2011 Lexus IS 350 User Guide - Page 205
2011 Lexus IS 350 Manual
Page 205 highlights
2-4. Using other driving systems Hill-start assist control Hill-start assist control helps to prevent the vehicle from rolling backwards when starting on an incline or slippery slope. To engage hill-start assist control, further depress the brake pedal when the vehicle is stopped completely. A buzzer will sound once to indicate the system is activated. The slip indicator will also start flashing. n Hill-start assist control can be operated when l The shift lever is in a position other than P (vehicles with automatic transmis- sion). l The parking brake is not applied. l The accelerator pedal is not depressed. n Hill-start assist control l While hill-start assist control is operating, the brakes remain automatically applied after the driver releases the brake pedal. The stop lights and the high mounted stoplight turn on. l Hill-start assist control operates for about 2 seconds after the brake pedal is released. l If the slip indicator does not flash and the buzzer does not sound when the brake pedal is further depressed, slightly reduce the pressure on the brake pedal (do not allow the vehicle to roll backward) and then firmly depress it again. If the system still does not operate, check if the operating conditions explained above have been met. 212