2011 Toyota Land Cruiser Owners Manual - Page 234

2-4. Using other driving systems When the VSC/Active TRAC/hill-start assist control systems are operating If the vehicle is in danger of slipping, rolling backwards when starting on an incline, or if the rear wheels spin, the slip indicator light flashes to indicate that the VSC/Active TRAC/hill-start assist control systems have been engaged. A buzzer (intermittent) sounds to indicate that VSC is operating. The stop lights and high mounted stoplight turn on when the hillstart assist control system is operating. ITY24C035 210