2017 TOYOTA YARIS HYBRID brake sensor

1994-3. Operating the lights and wipers
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Driving
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■Daytime running light system
To make your vehicle more visible to other drivers during daytime driving, the
daytime running lights turn on automatically whenever the hybrid system is
operated and the parking brake is released with the headlight switch off or in
the “AUTO” position. (Illuminate bright er than the front position lights.) Day-
time running lights are not designed for use at night.
■ Headlight control sensor (if equipped)
■ Automatic light off system (if equipped)
Vehicles without a smart entry & start system
● When the light switch is in or : The headlights and front fog
lights turn off automatically when the power switch is turned to the “LOCK”
position.
● When the light switch is in : The headlights and all the lights turn off
automatically when the power switch is turned to the “LOCK” position.
To turn the lights on again, turn the power switch to the “ON” position, or turn
the light switch off once and then back to or .
Vehicles with a smart entry & start system
● When the light switch is in or : The headlights turn off automati-
cally if the power switch is tur ned to ACCESSORY mode or turned off and
the driver’s door is opened.
● When the light switch is in : The headlights and tail lights turn off auto-
matically if the power switch is turned to ACCESSORY mode or turned off
and the driver’s door is opened.
To turn the lights on again, turn the power switch to ON mode, or turn the light
switch off once and then back to or .
■ Automatic High Beam (if equipped)
 P. 236
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the
windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight sys-
tem to malfunction.

2184-5. Toyota Safety Sense
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PCS (Pre-Crash Safety system)
◆Pre-crash warning
When the system determines
that the possibility of a frontal
collision is high, a buzzer will
sound and the PCS activation
indicator will flash to urge the
driver to take evasive action.
◆Pre-crash brake assist
When the system determines that the possibility of a frontal colli-
sion with a vehicle is high, the system applies greater braking force
in relation to how strongly the brake pedal is depressed.
◆Pre-crash braking
When the system determines that the possibility of a frontal colli-
sion with a vehicle is high, the system warns the driver. If the sys-
tem determines that the possibility of a collision is extremely high,
the brakes are automatically applied to help avoid the collision or
reduce the collision speed.
: If equipped
The pre-crash safety system uses the front sensor to detect
vehicles in front of your vehicle. When the system determines
that the possibility of a frontal collision with a vehicle is high, a
warning operates to urge the driver to take evasive action and
the potential brake pressure is increased to help the driver avoid
the collision.
If the system determines that the possibility of a frontal collision
with a vehicle is extremely high, the brakes are automatically
applied to help avoid the collision or help reduce the impact of
the collision.
The pre-crash safety system can be disabled/enabled and the warn-
ing timing can be changed. ( P. 221)

2294-5. Toyota Safety Sense
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Driving
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• If the wheels are misaligned
• If a wiper blade is blocking the front sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely high speeds.
• When driving on roads with sharp bends or uneven surfaces
• When a preceding vehicle is a poor reflector of laser
● In some situations such as the following, sufficient braking force may not be
obtained, preventing the system from performing properly:
• If the braking functions cannot operate to their full extent, such as when
the brake parts are extremely cold, extremely hot, or wet
• If the vehicle is not properly maintained (brakes or tires are excessively
worn, improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery sur-
face
• If your vehicle is skidding
• When the front part of the vehicle is
raised or lowered
• When the sensor is misaligned due to
a strong impact being applied to the
sensor, etc.

2304-5. Toyota Safety Sense
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■ If the PCS warning light flashes or illuminates
The pre-crash safety system may be temporarily unavailable or there may be
a malfunction in the system.
● In the following situations, the warning light will be cleared and the system
will become operational when normal operating conditions return:
• When the area around the front sensor is hot, such as after the vehicle
has been parked in the sun
• When the windshield is fogged up or covered with condensation or ice
( P. 296)
• When the front sensor or the area around either sensor is cold, such as in
an extremely cold environment
• If the area in front of the front sens or is obstructed, such as when the
hood is open
● If the PCS warning light continues to flash or illuminate, the system may be
malfunctioning. Have the vehicle inspected by any authorized Toyota dealer
or repairer, or another duly qualifi ed and equipped professional immediately.
■ If VSC is disabled
● If TRC and VSC are disabled (P. 246), the pre-crash brake assist and pre-
crash braking functions are also disabled. However, the pre-crash warning
function will still operate.
● The PCS warning light illuminates.