2014 TOYOTA PRIUS PLUS brake sensor

2164-3. Operating the lights and wipers
PRIUS +_OM_OM47888E_(EE)
■Daytime running light system
To make your vehicle more visible to other drivers, the daytime running lights
turn on automatically whenever the hybrid system is started and the parking
brake is released.
■ Headlight control sensor (if equipped)
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.
Air conditioning operation may also be
interrupted.

2444-5. Using the driving support systems
PRIUS +_OM_OM47888E_(EE)
WARNING
■ Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an acci-
dent resulting in death or serious injury.
●Except on highways or expressways
● In heavy traffic
● On roads with sharp bends
● On winding roads
● On slippery roads, such as those covered with rain, ice or snow
● On steep downhills, or where ther e are sudden changes between sharp up
and down gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
● At entrances to expressways
● When weather conditions are bad enough that they may prevent the sen-
sors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
● When an approach warning buzzer is heard often
■ When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes (or accelerator pedal) as necessary when any of the fol-
lowing types of vehicles are in front of you.
As the sensor may not be able to correctly detect these types of vehicles,
the approach warning ( →P. 238) will not be activated, and a fatal or serious
accident may result.
● Vehicles that cut in suddenly
● Vehicles traveling at low speeds
● Vehicles that are not moving in the same lane
● Vehicles with small rear ends (trailers with no load on board etc.)
● Motorcycles traveling in the same lane
● When water or snow thrown up by the surrounding vehicles hinders the
detecting of the sensor

2454-5. Using the driving support systems
4
Driving
PRIUS +_OM_OM47888E_(EE)
WARNING
■ Conditions under which the vehicle-to-vehicle distance control may
not function correctly
Apply the brakes (or accelerator pedal) as necessary in the following condi-
tions as the radar sensor may not be able to correctly detect vehicles
ahead, and a fatal or serious accident may result:
●When the vehicle ahead of you decelerates suddenly
When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
●When the road curves or when the
lanes are narrow
● When steering wheel operation or your
position in the lane is unstable
Accelerate
Accelerate
Decelerate

2544-5. Using the driving support systems
PRIUS +_OM_OM47888E_(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)

2564-5. Using the driving support systems
PRIUS +_OM_OM47888E_(EE)
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
4
Driving
PRIUS +_OM_OM47888E_(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

2604-5. Using the driving support systems
PRIUS +_OM_OM47888E_(EE)
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 radar sensor needs to be replaced, contact any authorized Toyota
dealer or repairer, or another dul y qualified and equipped professional.

3907-2. Steps to take in an emergency
PRIUS +_OM_OM47888E_(EE)
Indicates a malfunction in the shift control systemIn this situation, there is a possibility that the
parking lock mechanism will not work. When
parking, park the vehicle on a flat surface and
apply the parking brake securely. Also, it may
not be possible to turn the power switch off. If
this happens, applying the parking brake will
enable the switch to be turned off. A buzzer
also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional.
Indicates a malfunction in the hybrid system
A buzzer also sounds.
→ Immediately stop the vehicle in a safe place
and contact any authorized Toyota dealer
or repairer, or another duly qualified and
equipped professional.
Indicates that the hybrid battery (traction battery)
is low
A buzzer also sounds.
→ When stopping the vehicle for a long
period of time, shift the shift position to P.
The battery cannot be charged with the
shift position in N.
(If equipped)
Indicates that the radar cruise control sensor is
dirty or covered with ice
A buzzer also sounds.
→ Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control
system is unable to judge vehicle-to-vehicle dis-
tance
A buzzer also sounds.
→ If the windshield wipers are on, turn them
off or set them to either intermittent or slow
mode.
Warning messageDetails/Actions
(Flashes)