Toyota Sienna 2021, Manual

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4-5. Using the driving support systems
4
Dr
iv
ing
■
Steering assist function
When the system determines
that the vehicle might depart
from its lane or course
*
, the sys-
tem provides assistance as nec-
essary by operating the steering
wheel in small amounts for a
short period of time to keep the
vehicle in its lane.
If the system detects that the steer-
ing wheel has not been operated
for a fixed amount of time or the
steering wheel is not being firmly
gripped, a warning is displayed on
the multi-information display and
the function is temporarily can-
celed.
Vehicle with BSM: When the sys-
tem determines that the vehicle
might depart from its lane and that
the possibility of a collision with an
overtaking vehicle in the adjacent
lane is high, the steering assist
function will operate even if the turn
signals are operating.
*
: Boundary between asphalt and
the side of the road, such as
grass, soil, or a curb
■
Vehicle sway warning func-
tion
When the vehicle is swaying
within a lane, the warning
buzzer will sound and a mes-
sage will be displayed on the
multi-information display to alert
the driver.