TOYOTA YARIS HYBRID 2017 Owners Manual

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■Enabling/disabling the pre-crash safety system
Press the PCS switch for 3 sec-
onds or more.
The PCS warning light will turn
on and a message will be dis-
played in the multi-information
display, when the system is
turned off.
To enable the system, press the
PCS switch again.
The pre-crash safety system is
enabled each time the hybrid
system is started.
■Changing the pre-crash warning timing
Press the PCS switch to turn on the PCS activation indicator and
display the current warning timing in the multi-information display.
Each time the PCS switch is pressed in the displayed state, the tim-
ing for the warning changes as follows:
If the operation timing setting has been changed, the setting will be
retained the next time the hybrid system is started.
Far
The warning will begin to oper-
ate earlier than with the default
timing.
Middle
This is the default setting.
Near
The warning will begin to oper-
ate later than with the default
timing.
Changing settings of the pre-crash safety system
1
2
3

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■Operational conditions
The pre-crash safety system is enabled and determines that the possibility of
a frontal collision with a vehicle is high.
Each function is operational at the following speeds:
● Pre-crash warning:
• Vehicle speed is approximately 15 to 140 km/h (10 to 86 mph).
• The relative speed between your vehicle and a preceding vehicle is
approximately 15 km/h (10 mph) or more.
● Pre-crash brake assist:
• Vehicle speed is approximately 30 to 80 km/h (19 to 49 mph).
• The relative speed between your vehicle and a preceding vehicle is
approximately 30 km/h (19 mph) or more.
● Pre-crash braking:
• Vehicle speed is approximately 10 to 80 km/h (7 to 49 mph).
• The relative speed between your vehicle and a preceding vehicle is
approximately 10 km/h (7 mph) or more.
The system may not operate in the following situations:
● If a battery terminal has been disconnected and reconnected and then the
vehicle has not been driven for a certain amount of time
● If the shift lever is in R
● If VSC is disabled (only the pre-crash warning function will be operational)
● If the PCS warning light is flashing or illuminated
■ Cancelation of the pre-crash braking
● If either of the following occur while the pre-crash braking function is operat-
ing, it will be canceled:
• The accelerator pedal is depressed strongly.
• The steering wheel is turned sharply or abruptly.
● If the vehicle is stopped by the operation of the pre-crash braking function,
the operation of the pre-crash braking function will be canceled after the
vehicle has been stopped for approximately 2 seconds.

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■ Conditions under which the system may operate even if there is no pos-
sibility of a collision
● In some situations such as the following, the system may determine that
there is a possibility of a frontal collision and operate
• If the front of the vehicle is raised or lowered, such as when the road sur-
face is uneven or undulating
• When passing a vehicle in an oncom-
ing lane that is stopped to make a
right/left turn
• When passing an oncoming vehicle
while making a left or right turn
• When driving on a road where relative
location to vehicle ahead in an adja-
cent lane may change, such as on a
winding road
• When rapidly closing on a preceding
vehicle

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• When driving on a narrow path surrounded by a structure, such as in a
tunnel or on an iron bridge
• When passing extremely close to a
vehicle or structural object
• When there is a vehicle or object by
the roadside at the entrance of a
curve
• When there is a reflective object
(manhole cover, steel plate, etc.),
steps, dip, or a protrusion on the road
surface or roadside
• When passing through a place with a
low structure above the road (low ceil-
ing, traffic sign, etc.)
• When there is a structural object
(overpass, traffic sign, billboard,
street light, etc.) at the top of an uphill
road

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• When using an automatic car wash
• When there are patterns or paint on t he road or a wall that may be mis-
taken for a vehicle
• When rapidly closing on an electric
toll gate barrier, parking area barrier,
or other barrier that opens and closes
• When approaching a low hanging
object that may contact the vehicle,
such as a banner, tree branches or
thick grass
• When the vehicle is hit by water,
snow, dust, etc. from a vehicle ahead
• When driving through steam or
smoke
• When the front part of the vehicle is
raised or lowered

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• When the sensor is misaligned due to
a strong impact being applied to the
sensor, etc.
• When the vehicle is being parked in a
place where there is a low hanging
object at the height of the front sensor
• When the windshield is covered with
raindrops, etc.

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■ Situations in which the system may not operate properly
● In some situations such as the following, a vehicle may not be detected by
the front sensor, preventing the system from operating properly:
• If an oncoming vehicle is approaching your vehicle
• When approaching the side or front of a vehicle
• If a preceding vehicle has a small rear end, such as an unloaded truck
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead is irregularly shaped, such as a tractor or side car
• If the sun or other light is shining directly on a vehicle ahead
• If a vehicle ahead makes an abrupt maneuver (such as sudden swerving,
acceleration or deceleration)
• When suddenly cutting behind a preceding vehicle
• If a preceding vehicle has a low rear
end, such as a low bed trailer
• If a vehicle ahead has extremely high
ground clearance
• If a vehicle cuts in front of your vehicle
or emerges from beside a vehicle

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• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke that may obscure vehicles ahead
• When driving in a place where the surrounding brightness changes sud-
denly, such as at the entrance or exit of a tunnel
• While driving on a curve and for a certain amount of time after driving on
a curve
• When a vehicle ahead is not directly
in front of your vehicle
• When driving in inclement weather
such as heavy rain, fog, snow or a
sand storm
• When a very bright light, such as the
sun or the headlights of oncoming
traffic, shines directly into the front
sensor
• When the surrounding area is dim,
such as at dawn or dusk, or while at
night or in a tunnel

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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.

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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.