2020 TOYOTA YARIS HATCHBACK sensor

194
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-4. Switches and Controls
When the lights are turned on, the
lights-on indicator light in the com-
bination meter turns on.
■Auto-light control (if equipped)
When the headlight switch is in the AUTO position and the ignition
is switched ON, the light sensor s enses the surrounding lightness
or darkness and automatically turns the headlights, other exter ior
lights and dashboard illumination on or off.
■ Headlights
●If the light switch is left on, the lights will automatically switch off approxi-
mately 30 seconds after switching the ignition off.
The time setting can be changed.
Refer to Customizable Features on P. 555.
● To prevent discharging the battery, do not leave the lights on while the
engine is off unless safety requires them.
■ Auto-light control
●The headlights, other exterior lights and dashboard illuminatio n may not turn
off immediately even if the surrounding area becomes well-lit because the
light sensor determines that it is night time if the surrounding area is contin-
uously dark for several minutes such as inside long tunnels, tr affic jams
inside tunnels, or in indoor parking lots.
In this case, the lights turn off if the light switch is turned to the OFF position.
● If the headlight switch and the windshield wiper switch are in AUTO, and the
wipers are operated at low or high speed by the auto wiper cont rol for sev-
eral seconds, bad weather conditions are determined and the hea dlights
may be turned on.
● The dashboard illumination can be adjusted by rotating the knob in the
instrument cluster.
Also, the day/night mode can be changed by rotating the knob un til a beep
sound is heard.
To adjust the brightness of the dashboard illumination:
Refer to Dashboard Illumination on P. 169.
● The sensitivity of the auto-light control may be changed.
Refer to Customizable Features on P. 555.

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1953-4. Switches and Controls
3
When Driving
NOTICE
●The light sensor also works as a rain sensor for the auto-wiper control.
Keep hands and scrapers clear of the windshield when the wiper lever is in
the AUTO position and the ignition is switched ON as fingers could be
pinched or the wipers and wiper blades could be damaged when th e wip-
ers activate automatically. If you are going to clean the windshield, be sure
the wipers are turned off completely when it is particularly te mpting to
leave the engine running. This is particularly important when clearing ice
and snow.
● Do not shade the light sensor by adher-
ing a sticker or a label on the wind-
shield. Otherwise the light sensor will
not operate correctly.

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
2033-4. Switches and Controls
3
When Driving
●With auto-wiper control
Turn the wipers on by pressing
the lever up or down.
■Auto-wiper control (if equipped)
When the wiper lever is in the
AUTO position, the rain sensor
senses the amount of rainfall on
the windshield and turns the wip-
ers on or off automatically
(off―intermittent―low speed―
high speed).
The sensitivity of the rain sensor
can be adjusted by turning the
switch on the wiper lever.
From the center position (normal), rotate the switch upward for higher
sensitivity (faster response) or rotate it downward for less sensitivity
(slower response).
Switch PositionWiper operation
MISTOperation while pulling up lever
OFFStop
AUTOAuto control
LOLow speed
HIHigh speed
Switch Less sensitivity
Higher sensitivity
Center
position

204
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-4. Switches and Controls
●Switching the auto-wiper lever from the OFF to the AUTO positio n while
driving activates the windshield wipers once, after which they operate
according to the rainfall amount.
● The auto-wiper control may not operate when the rain sensor tem perature is
about -10 °C (14 °F) or lower, or about 85 °C (185 °F) or higher.
● If the windshield is coated with water repellent, the rain sens or may not be
able to sense the amount of rainfall correctly and the auto-wip er control may
not operate properly.
● If dirt or foreign matter (such as ice or matter containing sal t water) adheres
to the windshield above the rain sensor, or if the windshield i s iced, it could
cause the wipers to move automatically. However, if the wipers cannot
remove this ice, dirt or foreign matter, the auto-wiper control will stop opera-
tion. In this case, set the wiper lever to the low speed positi on or high speed
position for manual operation, or remove the ice, dirt or forei gn matter by
hand to restore the auto-wiper operation.
● If the auto-wiper lever is left in the AUTO position, the wipers could operate
automatically from the effect of strong light sources, electrom agnetic waves,
or infrared light because the rain sensor uses an optical senso r. It is recom-
mended that the auto-wiper lever be switched to the OFF positio n other than
when driving the vehicle under rainy conditions.
● The auto-wiper control functions can be turned off. Refer to Cu stomizable
Features on P. 555
NOTICE
● When the wiper lever is in the AUTO position and the ignition is switched
ON, the wipers may move automatically in the following cases:
• If the windshield above the rain sensor is touched or wiped with a cloth.
• If the windshield is struck with a hand or other object from e ither outside
or inside the vehicle.
Keep hands and scrapers clear of the windshield when the wiper lever is
in the AUTO position and the ignition is switched ON as fingers could be
pinched or the wipers and wiper blades damaged when the wipers acti-
vate automatically. If you are going to clean the windshield, be sure the
wipers are turned off completely (when it is most likely that t he engine is
left running) this is particularly important when clearing ice and snow.
●Do not shade the rain sensor by adher-
ing a sticker or a label on the wind-
shield. Otherwise the rain sensor will
not operate correctly.

227
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-10. Active Safety System
3
When Driving
Active Safety System
◆Pre-Crash Safety Technology
Pre-crash safety technology is designed to assist the driver in
averting collisions or reduce their severity in situations where they
cannot be avoided.
● Collision damage reducti on in low vehicle speed range
Forward driving:
Low Speed Pre-Co llision System (P. 228)
◆Sensor
● Laser sensor
The laser sensor emits a near-infrared laser beam and receives
the beam reflected off the refl ective surface of a vehicle or
obstruction in front, and the det ected beam is then used for me a-
surement. The laser sensor is us ed for the Low Speed Pre-Colli-
sion System.
The laser sensor is installed at the top of the windshield near the
rearview mirror.
Refer to Laser Sensor on P. 234.

228
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-10. Active Safety System
Low Speed Pre-Collision System
The Low Speed Pre-Collision System is designed to reduce
damage in the event of a colli sion by operating the brake control
(Low Speed Pre-Collision System brake) when the system’s
laser sensor detects a vehicle a head and determines that a colli-
sion with a vehicle ahead is unavo idable. It may also be possible
to avoid a collision if the relat ive speed between your vehicle
and a vehicle ahead is less than about 12 mph (20 km/h).
In addition, when the driver depresses the brake pedal while th e
system is in the operation range at about 2 to 18 mph (4 to
30 km/h), the brakes are applied firmly and quickly to assist.
(Brake Assist (Low Speed Pre-Collision System brake assist))
Laser sensor

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
2293-10. Active Safety System
3
When Driving
●The Low Speed Pre-Collision System will not operate if the driv er is deliber-
ately performing driving operations (accelerator pedal and stee ring wheel).
● The Low Speed Pre-Collision System will operate under the follo wing condi-
tions.
• The engine is running.
• The Low Speed Pre-Collision System warning light (amber) does not illu-
minate.
• The vehicle speed is between about 2 to 18 mph (4 to 30 km/h).
• The Low Speed Pre-Collision System is not turned off.
• The DSC is not malfunctioning.
● The Low Speed Pre-Collision System detects a vehicle ahead by emitting a
near-infrared laser beam and receiving the beam reflected off the reflector
of the vehicle ahead, and then using it for the measurement. Co nsequently,
the Low Speed Pre-Collision System may not operate under the following
conditions:
• Reflection of the laser is poor due to the shape of the vehicl e ahead.
• The vehicle ahead is significantly dirty.
• Under bad weather condition, such as rain, fog and snow.
• The window washer is being used or the windshield wipers are not used when it’s raining.
• The windshield is dirty.
• The steering wheel is turned completely left or right, or the vehicle is
accelerated rapidly and comes close to the vehicle ahead.
• Trucks with low loading platforms and vehicles with an extreme ly low or
high profile.
• Vehicles with certain shapes such as a vehicle carrier.
● Under the following conditions, the Low Speed Pre-Collision Sys tem may
not operate normally.
• Heavy luggage is loaded in the luggage compartment or on the r ear seat.
• If there is the possibility of partial contact with a vehicle ahead.
• When driving on continuously curving roads, and entering and e xiting
exits.
• Elongated luggage or cargo is loaded onto installed roof rails and covers
the laser sensor.
• Exhaust gas from the vehicle in front, sand, snow, and water v apor rising
from manholes and grating, and water splashed into the air.
• When towing a malfunctioning vehicle.
• When driving with tires having significantly different wear.

230
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-10. Active Safety System
●In the following cases, the laser sensor may inadvertently dete rmine that
there is a vehicle ahead and the Low Speed Pre-Collision System may oper-
ate.
• Objects on the road at the entrance to a curve.
• Vehicles passing in the opposite lane while making a curve.
• Metal objects, bumps, or protruding objects on the road.
• When passing through a toll gate equipped with a bar.
• When passing under a vinyl curtain or flag.
• Plastic objects such as pylons.
• Two-wheeled vehicles, pedestrians, animals or standing trees.
● Manual transaxle:
If the vehicle is stopped by the Low Speed Pre-Collision System operation
and the clutch pedal is not depressed, the engine stops.
● The Low Speed Pre-Collision System warning light (amber) turns on when
the system has a malfunction.
Refer to Warning Lights on P. 173.