TOYOTA 2011 Prius - Manual (Page 270)

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2-4. Using other driving systems
PRIUS_U (OM47685U) DVD
n Turning the LKA system on
The lane departure warning function and lane keeping assist
function will be automatically activated depending on the recog-
nition condition of lane markings, vehicle speed and the setting
of radar cruise control (vehicle-to-vehicle distance control
mode).
Press the “LKA” switch to acti-
vate the system.
Press the switch again to turn
the LKA system off.
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