2009 Lexus GS 450h Owners Manual - Page 280
2009 Lexus GS 450h Manual
Page 280 highlights
2-4. Using other driving systems n Automatic reactivation of TRAC and Enhanced VSC Turning the "POWER" switch OFF after turning off the TRAC and Enhanced 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 the vehicle speed increases. n Automatic TRAC and Enhanced VSC reactivation If the TRAC and Enhanced VSC systems are turned off, the systems will not turn on even when the vehicle speed increases. n Sounds and vibrations caused by the ABS, brake assist, Enhanced VSC, TRAC, hill-start assist control and VGRS systems l A sound may be heard from the engine compartment when the hybrid system 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. The brake pedal may pulsate slightly after the ABS is activated. The brake pedal may move down slightly after the ABS is activated. n Hill-start assist control operating conditions This system comes into operation under the following conditions after the brake pedal has been depressed and the vehicle has come to a stop: l The shift lever is in the "D" or "S". l The system has detected that the vehicle is moving backwards. n EPS operation sound When the steering wheel operates, a motor sound (whirring sound) may be heard. This does not indicate a malfunction. 218 GS_HV_U (OM30B44U) March 8, 2010 10:03 am