2005 Lexus GX 470 Owners Manual - Page 465

STARTING AND DRIVING Keep in mind the following when driving. D The hill-start assist control 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 is not designed as a function for stopping the vehicle on a uphill slope. When stopping the vehicle, be sure to depress the brake pedal. The brake actuator temperature increases during continuous operation of the following systems. D Active traction control system D Vehicle stability control system D Downhill assist control system D Hill-start assist control If the brake actuator temperature becomes too high while any of the systems is operating, a buzzer will start to sound intermittently to indicate that the hill-start assist control can no longer operate. In this case, stop your vehicle immediately at a safe place. If the system continues to operate, the buzzer sound changes from intermittent to continuous. (The continuous buzzer sounds for about 3 seconds.) At this time, the slip indicator light will come on and the hill-start assist control stops operating temporarily in order to protect the brake actuator. (Although the hill-start assist control does not operate, it is no problem to continue your driving.) The system will be automatically restored after a short time and the slip indicator light goes out. 440