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:
What types of decisions are rendered, and how do I know if Lexus will abide
by the decision of the arbitrator(s)?
Arbitrated decisions are based on what the arbitrator(s) believe to be fair and
equitable after applying the appropriate legal standards. Remedies include but are
not limited to repairs; reimburse ...
Overview button and guidance screen
*: Press and hold the “PWR·VOL� knob for 3 seconds or more to turn off the
screen and restart the
navigation system. Do this when the vehicle-mounted device response is extremely
slow. ...
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct procedure
given in these sections.
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
...
