2006 Lexus GX 470 Owners Manual - Page 404

STARTING AND DRIVING If you push the "DAC" switch to turn the system off while it is in operation, the system will stop operating gradually. The downhill assist control system indicator light will flash to alert the driver. To continue driving at a low speed, push the "DAC" switch to turn the system on. The slip indicator light and downhill assist control system indicator light come on for a few seconds when the ignition key is turned to "ON". If any of the indicator lights does not come on when the ignition is turned on, contact your Lexus dealer. 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 downhill assist control system 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 downhill assist control system stops operating temporarily in order to protect the brake actuator. (Although the downhill assist control system 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. 379 If there is any abnormality in the system, the "VSC TRAC" warning light will come on. When the "DAC" switch is pushed, the downhill assist control system indicator light also flash. "VSC TRAC" warning light