2006 Lexus LS 430 Owners Manual - Page 155

2-4. Using other driving systems To disable VSC and TRAC If the vehicle gets stuck in fresh snow or mud, VSC and TRAC may reduce power from the engine to the wheels. You may need to turn VSC and TRAC off to enable you to rock the vehicle in order to free the vehicle. 1 Push the button to turn off VSC and TRAC. The TRAC OFF indicator light turns on. Push the button again to turn the system back on. 2 When driving n Operating sounds and vibrations caused by the ABS, VSC & TRAC 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 ABS, VSC and TRAC sys- tems are operating. None of these indicates that a malfunction has occurred A sound may be heard. 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 while the ABS is activated. The brake pedal may move forward slightly after the ABS is activated. n Failure warning for VSC or TRAC system If an error in the VSC or TRAC systems is detected, the master warning light and TRAC OFF indicator light comes on, a warning tone sounds. (→P.334) 141