Lexus LS460 2011 Owner's Manual page 292

2-4. Using other driving systems

LKA switch

Temporary cancellation of the LKA system functions
If any of the following occurs, the LKA system functions will automatically
be temporarily cancelled. The functions will resume after the necessary
operating conditions have returned.

The turn signal lever is operated.

The steering wheel is turned as far as necessary to cause the vehicle to
change lanes.

The vehicle speed deviates from the operating range of the LKA system
functions.*

The lane lines cannot be recognized while driving.*

The wiper operates continuously.*
The signal may not beep when the LKA system functions are cancelled
because the notification of adaptive cruise control with full-speed range
cancellation takes priority over the LKA system functions cancellation.

The brake pedal is depressed.
The lane keeping assist function will not resume even after the brake
pedal is released because depressing the brake pedal also cancels the
adaptive radar cruise control. However, the lane departure warning func-
tion resumes operation.
*: When the lane keeping assist function is canceled while it is in use, a
buzzer will beep twice to inform the driver that the function has been can-
celed.
276
LS460_EE
Turns the LKA system on
and off.
When on, the lane keeping
assist indicator light comes
on.