When the VSC/TRAC or Active TRAC/hill-start assist control systems are operating
If the vehicle is in danger of slip- ping or rolling backward when starting on an incline, or if any of the drive wheels spins, the slip indi- cator light flashes to indicate that the VSC/TRAC or Active TRAC/ hill-start assist control systems are operating.
A buzzer (intermittent) sounds to indicate that VSC is operating.
The stop lights and high mounted stoplight turn on when the hill-start assist control system is operating.

See also:
The Smart Key
Your Lexus vehicle was made with two “Smart Keys” and an aluminum key-number
plate. Each Smart Key includes an electronic main key that has an integrated mechanical
back-up key. The electronic ...
Inside rear view mirror
In automatic mode, sensors are used to detect the headlights of vehicles behind
and the reflected light is automatically reduced.
Without compass
1. Turns automatic mode on
2. Turns automatic ...
Cooling system
...
