2004 Lexus GX 470 Owners Manual - Page 444

STARTING AND DRIVING 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. "VSC TRAC" warning light " Slip indicator light Leave the system on during the ordinary driving so that it can operate when needed. You may hear a sound in the engine compartment for a few seconds when the engine is started or just after the vehicle begins to move. This means that the active traction control system is in the self-check mode, but does not indicate a malfunction. When the active traction control system is operating, the following conditions occur: D The system controls the spinning of the 4 wheels. At this time, the slip indicator light blinks. D You may feel vibration or noise in your vehicle, caused by operation of the brakes. This indicates the system is functioning properly. This light warns that there is a problem somewhere in the following. D Active traction control system D Vehicle stability control system D Downhill assist control system D Hill-start assist control system When the system is normal and the ignition key is turned to "ON", the warning light will come on and will go off after a few seconds. It is not a malfunction that the warning light may stay on for 60 seconds after the ignition key is turned to the "ON" position. 421