2009 Toyota 4Runner Owners Manual - Page 213

2-4. Using other driving systems When the VSC/TRAC/A-TRAC/hill-start assist control system are operating If the vehicle is in danger of slipping, the rear wheels (2WD models) or four wheels (4WD models) spin, the vehicle starts to roll backwards when starting on an incline, the slip indicator flashes to indicate that the VSC/ TRAC/A-TRAC/hill-start assist control have been engaged. A buzzer (intermittent) sounds to indicate that VSC/hill-start assist control is operating. The stop lights and high mounted stoplight turn on when the hillstart assist control system is operating. 2 When driving 189