2007 Lexus LS 460 Owners Manual - Page 202

2-4. Using other driving systems n Automatic reactivation of TRAC and VSC Turning the engine switch OFF after turning off the TRAC and VSC systems will automatically re-enable them. n Automatic TRAC reactivation If only the TRAC system is turned off, the TRAC system will turn on when vehicle speed increases. n Automatic TRAC/VSC reactivation If the TRAC/VSC systems are turned off, the systems will not turn on even when vehicle speed increases. n Sounds and vibrations caused by the ABS, BA, VSC, TRAC, hill-start assist con- trol and VGRS systems l A sound may be heard from the engine compartment when the engine is started or just after the vehicle begins to move. This sound does not indicate that a malfunction has occurred in any of these systems. l Any of the following conditions may occur when the above systems are operat- ing. None of these indicates that a malfunction has occurred. • Vibrations may be felt through the vehicle body and steering. • A motor sound may be heard after the vehicle comes to a stop. n Hill-start assist control is operational when l The shift lever is in the D or S position. l The brake pedal is not depressed. n EPS operation sound When the steering wheel operates, a motor sound (whirring sound) may be heard. This does not indicate a malfunction. n VGRS is disabled in the following situations The center position of the steering wheel may change when VGRS is disabled. However, the position will return to normal after VGRS is re-enabled. l When the steering wheel has been operated for a long time while the vehicle is stopped or is moving very slowly l When the steering wheel has been held fully to the left or right l When the battery is low or the voltage temporarily drops l After the engine is started at lower than -22°F (-30°C). 176