Lexus LS460 2011 Owner's Manual page 368

2-4. Using other driving systems
CAUTION

TRC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRC system is operating.
Do not drive the vehicle in conditions where stability and power may be
lost.

If the hill- start assist control does not operate effectively
Do not overly rely on the hill-start assist control. The hill start assist control
may not operate effectively on steep inclines and roads covered in ice.

When the VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive
carefully. Reckless driving may cause an accident. Exercise particular care
when the indicator light flashes and a buzzer sounds.

When TRC and VSC are off
Be especially careful and drive at a speed appropriate to the road conditions.
As these are systems to ensure vehicle stability and driving force, do not
turn off TRC and VSC unless necessary.

Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total
load capacity. In addition, make sure that the tires are inflated to the appro-
priate tire pressure level.
The ABS and VSC systems will not function correctly if different tires are
fitted on the vehicle.
Contact any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional, for further information when replacing tires or
wheels.

Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will
affect the driving assist systems, and may cause the system to malfunction.
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