TOYOTA PRIUS PLUS 2015 Owners Manual

2514-5. Using the driving support systems
4
Driving
PRIUS +_OM_OM47B16E_(EE)■
Operating conditions of emergency brake signal
When the following three conditions are met, the emergency brake signal will
operate:
●The emergency flashers are off.
● Actual vehicle speed is over 55 km/h (35 mph).
● The brake pedal is depressed in a manner that cause the system to judge
from the vehicle deceleration that this is a sudden braking operation.
■ Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
●The emergency flashers are turned on.
● The brake pedal is released.
● The system judges from the vehicle deceleration that is not a sudden brak-
ing operation.
■ Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
●The shift position is in a position other than P or N (when starting off forward/
backward on an upward incline).
● The vehicle is stopped.
● The accelerator pedal is not depressed.
● The parking brake is not engaged.
■ Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
● Shift the shift position to P or N
● The accelerator pedal is depressed
● The parking brake is engaged.
● Approximately 2 seconds elapse after the brake pedal is released.

2524-5. Using the driving support systems
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WARNING
■ The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick road.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten t he vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRC system is operating.
Drive the vehicle carefully in conditions where stability and power may be
lost.
■ Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist control. The hill-start assist control
may not operate effectively on steep inclines and roads covered with ice.
● Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
■ When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.

2534-5. Using the driving support systems
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Driving
PRIUS +_OM_OM47B16E_(EE)
WARNING
■ Replacing tires
Make sure that all tires are of the specified size and of the same brand,
tread pattern and total load capacity. In addition, make sure that the tires are
inflated to the recommended tire inflation pressure level.
The ABS, VSC and TRC systems will not function correctly if different tires
are installed on the vehicle.
Contact any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional for further in formation when replacing tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause a system to malfunction.

2544-5. Using the driving support systems
PRIUS +_OM_OM47B16E_(EE)
PCS (Pre-Crash Safety system)∗
◆Pre-crash warning
When a high possibility of a
frontal collision is detected, a
buzzer sounds and a message
is shown on the multi-informa-
tion display to urge the driver to
take evasive action.
◆Pre-crash brake assist
When there is a high possibility of a frontal collision, the system
applies greater braking force in relation to how strongly the brake
pedal is depressed.
◆Pre-crash braking
When there is a high possibility of a frontal collision, the system
warns the driver using a warning display and buzzer. If the system
determines that a collision is unavoidable, the brakes are automati-
cally applied to reduce the collision speed.
∗: If equipped
When the radar sensor detects possibility of a frontal collision,
brakes are automatically engaged to lessen impact as well as
vehicle damage.The alert timing for the pre-crash safety system can be changed or
turned ON/OFF, as necessary, by operating the switch. ( →P. 255)

2554-5. Using the driving support systems
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Driving
PRIUS +_OM_OM47B16E_(EE)■
Changing the alert timing of the pre-crash safety system
Each time the PCS switch is pressed, the response to the distance
changes as follows.
Far
Middle
*
Near
*: Default setting
■
Turning off the pre-crash safety system
Press the PCS switch for 3 sec-
onds or more seconds.
The PCS warning light turns on
and a message is shown on the
multi-information display.
To turn on the system, press the
PCS switch again. The system
is set to ON each time the power
switch is turned to ON mode.
Changing the pre-crash safety system
XLeft-hand drive vehiclesXRight-hand drive vehicles
1
2
3

2564-5. Using the driving support systems
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The radar sensor detects vehi-
cles or other obstacles on or near
the road ahead and determines
whether a collision is imminent
based on the position, speed, and
heading of the obstacles.
■The pre-crash safety system is operational when
The pre-crash safety system is on ( →P. 255) and the following conditions are
met:
● Pre-crash warning:
• Vehicle speed is greater than about 15 km/h (10 mph).
• The speed at which your vehicle is approaching the obstacle or the vehi-
cle running ahead of you is greater than about 10 km/h (7 mph).
● Pre-crash brake assist:
• Vehicle speed is greater than about 30 km/h (19 mph).
• The speed at which your vehicle is approaching the obstacle or the vehi-
cle running ahead of you is greater than about 30 km/h (19 mph).
• The brake pedal is depressed.
● Pre-crash braking:
• Vehicle speed is greater than about 15 km/h (10 mph).
• The speed at which your vehicle is approaching the obstacle or the vehi-
cle running ahead of you is greater than about 10 km/h (7 mph).
Radar sensor

2574-5. Using the driving support systems
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Driving
PRIUS +_OM_OM47B16E_(EE)■
Conditions that may trigger the system even if there is no possibility of a
collision
If the following obstructs the front of the sensor, the system judges that a col-
lision may be possible and operates.
● When passing by a vehicle while making left or right turns or passing a vehi-
cle in an opposite lane.
● When the vehicle rapidly approaches an object in front of it (such as another
vehicle, toll gate, etc.)
● When climbing a steep hill, etc., and there are structures in the upper region
of the road (billboards, low ceilings, street lamps, etc.)
● When driving through narrow passages or places with low ceilings (bridges,
tunnels, overhead passes, etc.)
● When driving on an uneven road surface
● When metal objects are on the road surface causing level differences or
protrusions in the road
● When an extreme change in vehicle height occurs
● When the radar sensor moves off position due to its surrounding area being
subjected to a strong impact.
● When there is an obstacle (guardrails, etc.) on the roadside at a curve
entrance
● When the front of your vehicle is pointing upwards (caused by putting a
heavy load in the luggage compartment)
When the system is activated in the situations described above, there is also
a possibility that the brakes will be applied with a force greater than normal.
■ Obstacles not detected
The sensor cannot detect plastic obstacles such as traffic cones. There may
also be occasions when the sensor cannot detect pedestrians, animals, bicy-
cles, motorcycles, trees, or snowdrifts.
■ Situations in which the pre-crash safety system does not function prop-
erly
The system may not function effectively in situations such as the following:
● On roads with sharp bends or uneven surfaces
● If a vehicle suddenly moves in front of your vehicle, such as at an intersec-
tion
● If a vehicle suddenly cuts in front of your vehicle, such as when overtaking
● In inclement weather such as heavy rain, fog, snow or sand storms
● When your vehicle is skidding with the VSC system off
● When an extreme change in vehicle height occurs
● When the radar sensor moves off position due to its surrounding area being
subjected to a strong impact
● Due to greatly turning the steering wheel when an obstacle suddenly
appears ahead

2584-5. Using the driving support systems
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Automatic cancelation of the pre-crash safety system
When a malfunction occurs due to sensor contamination, etc. that results in
the sensors being unable to detect obstacles, the pre-crash safety system will
be automatically disabled. In this case, the system will not activate even if
there is a collision possibility.
■ When there is a malfunction in the system, or if the system is tempo-
rarily unusable
The PCS warning light flashes and a warning message is shown on the multi-
information display. If a warning message is shown on the multi-information
display, read the message and follow the instructions. ( →P. 376, 388)
■ Certification for the pre-crash safety system

2594-5. Using the driving support systems
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Driving
PRIUS +_OM_OM47B16E_(EE)

2604-5. Using the driving support systems
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WARNING
■ Limitations of the pre-crash safety system
It is the driver’s responsibility to drive safely. The driver should be aware of
the surroundings and strive for safe driving.
Do not rely on the pre-crash safety system instead of normal braking opera-
tions. This system does not avoid or reduce collisions in every situation.
Overly relying on the system and entrusting it with safety may cause an
unexpected accident which could lead to death or serious injury.
Although the system is designed for the purpose to support in avoiding colli-
sions or reducing the damage of a collision, the effect changes according to
various conditions.( →P. 256)
Therefore, it does not always provi de the same performance. Also, the pre-
crash braking does not work depending on the operating conditions of the
driver. When the driver has stepped on the brake pedal and is operating the
steering wheel, the system judges that the driver is taking avoiding action
and the automatic braking may not operate.
■ Handling the radar sensor
Observe the following to ensure the pre-crash safety system can function
effectively.
Otherwise, the system may not function correctly and could result in an
accident.
●Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or
damage them.
● Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may not work
normally or malfunction. If the sensor or surrounding area is subject to a
strong impact, always have the area inspected and adjusted by any autho-
rized Toyota dealer or repairer, or another duly qualified and equipped pro-
fessional.
● Do not disassemble the sensor.
● Do not attach accessories or stickers to the sensor, grille cover or sur-
rounding area.
● Do not modify or paint the sensor and grille cover.
● If the sensor needs to be replaced, contact any authorized Toyota dealer
or repairer, or another duly qualified and equipped professional.