2005 Lexus GX 470 Owners Manual - Page 464

STARTING AND DRIVING HILL-START ASSIST CONTROL The hill-start assist control assists you in starting to move up a steep or slippery hill. When you start to move up the hill slope, the system helps to prevent the vehicle from rolling backward in the interval while you move your foot from the brake pedal to the accelerator pedal. The hill-start assist control will operate for 5 seconds maximally when all of the following conditions apply. D When the transmission is in any of positions "D", "4", "3", "2" or "L" 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 transmission 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 transmission in the "R". CAUTION D Do not rely excessively on the hill-start assist control. The vehicle may not be able to start smoothly on road surfaces or off-road surfaces such as extremely steep slopes or icy roads, on which sliding can occur very easily. D Do not use the hill-start assist control to stop the vehicle. The hill-start assist control is not designed as a function for stopping the vehicle on a uphill slope. " Slip indicator light When the hill-start assist control is operating, the slip indicator light flashes and an alarm sounds intermittently. At the same time, the stop lamps and high mounted stoplight are lit. The slip indicator light comes on for a few seconds when the ignition key is turned to "ON". If the indicator light does not come on when the ignition is turned on, contact your Lexus dealer. 439