2008 Lexus IS 250 Owners Manual - Page 173
2008 Lexus IS 250 Manual
Page 173 highlights
2-4. Using other driving systems n Automatic reactivation of TRAC and VSC Turning the "ENGINE START STOP" 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 and VSC reactivation If the TRAC and VSC systems are turned off, the systems will not turn on even when vehicle speed increases. n Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and hill-start 2 When driving assist control 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. The brake pedal may pulsate slightly after the ABS is activated. The brake pedal may move down slightly after the ABS is activated. 173