Toyota SIENNA 2022 Manual page 254

2
Turn the headlight switch to
the or
The Automatic High Beam indicator
will come on when the system is
operating.
■ High beam automatic turning
on or off conditions
● When all of the following condi-
tions are fulfilled, the high beam
will be automatically turned on
(after approximately 1 second):
• Vehicle speed is above approxi-
mately 21 mph (34 km/h) or more.
• The area ahead of the vehicle is
dark.
• There are no vehicles ahead with
headlights or tail lights turned on.
• There are few streetlights on the
road ahead.
● If any of the following conditions
are fulfilled, the high beam will be
automatically turned off:
• Vehicle speed drops below
approximately 17 mph (27 km/h).
• The area ahead of the vehicle is
not dark.
• Vehicles ahead have headlights
or tail lights turned on.
• There are many streetlights on the
road ahead.
■ Front camera detection infor-
mation
● The high beam may not be auto-
matically turned off in the following
situations:
• When oncoming vehicles sud-
denly appear from a curve
• When the vehicle is cut in front of
4-3. Operating the lights and wipers
position.
by another vehicle
• When vehicles ahead are hidden
from sight due to repeated curves,
road dividers or roadside trees
• When vehicles ahead appear from
the faraway lane on a wide road
• When vehicles ahead have no
lights
● The high beam may be turned off
if a vehicle ahead that is using fog
lights without using the headlights
is detected.
● House lights, street lights, traffic
signals, and illuminated billboards
or signs may cause the high beam
to switch to the low beams, or the
low beams to remain on.
● The following factors may affect
the amount of time taken to turn
the high beam on or off:
• The brightness of headlights, fog
lights, and tail lights of vehicles
ahead
• The movement and direction of
vehicles ahead
• When a vehicle ahead only has
operational lights on one side
• When a vehicle ahead is a two-
wheeled vehicle
• The condition of the road (gradi-
ent, curve, condition of the road
surface etc.)
• The number of passengers and
amount of luggage
● The high beam may be turned on
or off when the driver does not
expect it.
● Bicycles or similar objects may not
be detected.
● In the situations shown below, the
system may not be able to accu-
rately detect surrounding bright-
ness levels. This may cause the
low beams to remain on or the
high beams to cause problems for
pedestrians, vehicles ahead or
other parties. In these cases,
manually switch between the high
and low beams.
• In bad weather (rain, snow, fog,
sandstorms, etc.)
• The windshield is obscured by
253
4