Lexus LS 600h L 2015 Owner's Manual page 277

Turning the LKA system on
Press the LKA switch to activate the
system.
LKA indicator will come on.
Press the switch again to turn the LKA
system off.
The LKA system will revert to off each
time the power switch is turned to ON
mode.
LS600hL_U(OM50E41U)
4-5. Using the driving support systems
275
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