2018 TOYOTA PRIUS PLUG-IN HYBRID brake

4365-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)■Conditions under which the vehicle-to-vehicle distance control mode
may not function correctly
In the case of the following conditions, operate the brake pedal (or accelera-
tor pedal, depending on the situation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system
may not operate properly.
●When the vehicle ahead of you decelerates suddenly
●When driving on a road surrounded by a structure, such as in a tunnel or on
a bridge
●While the vehicle speed is decreasing to the set speed after the vehicle
accelerates by depressing the accelerator pedal ●When the road curves or when the lanes
are narrow
●When steering wheel operation or your
position in the lane is unstable

4415-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
■Automatic speed limiter cancellation
The set speed is automatically canceled in any of the situations:
● Cruise control is activated.
● When the VSC system and/or TRC system is turned off by pressing the
VSC OFF switch.
■ If the “Check Speed Limiter System” is displayed on the multi-informa-
tion display
Stop in a safe location, turn the power switch off and back on again, and then
set the speed limiter. If the speed limiter cannot be set, the system may be
malfunctioning. Even though the vehicle can be driven normally, have the
vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
WARNING
■ To avoid operating the speed limiter by mistake
Keep the speed limiter switch off when not in use.
■ Situations unsuitable for speed limiter
Do not use the speed limiter in either of the following situations.
Doing so may result in control of the vehicle being lost and could cause a
serious or fatal accident.
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills
NOTICE
When a warning is issued using the meter display and buzzer after exceed-
ing the set speed limit on a steep decline, depress the brake pedal to decel-
erate.

4665-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
■ If “Clean Parking Assist Sensor” is displayed on the multi-information
display
A sensor may be dirty or covered with snow or ice. In such cases, if it is
removed from the sensor, the system should return to normal.
Also, due to the sensor being frozen at low temperatures, a malfunction dis-
play may appear or an obstacle may not be detected. If the sensor thaws out,
the system should return to normal.
■ If “Parking Assist Malfunction” is displayed on the multi-information dis-
play
Depending on the malfunction of the sensor, the device may not be working
normally. Have the vehicle inspected by any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
■ Customization
Setting of buzzer volume can be changed.
(Customizable features: P. 738)
WARNING
■When using Toyota parking assist-sensor
Observe the following precautions to avoid an unexpected accident.
● Do not exceed the speed limit of 10 km/h (6 mph).
● The sensors’ detection areas and reaction times are limited. When moving
forward or reversing, check the areas surrounding the vehicle (especially
the sides of the vehicle) for safety, and drive slowly, using the brake to
control the vehicle’s speed.
● Do not install accessories within the sensors’ detection areas.

4675-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
WARNING
■Sensors
Certain vehicle conditions and the surrounding environment may affect the
ability of the sensor to correctly detect obstacles. Particular instances where
this may occur are listed below.
● There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve
this problem.)
● The sensor is frozen. (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen, the screen may show an
abnormal display, or obstacles may not be detected.
● The sensor is covered in any way.
● In harsh sunlight or intense cold weather
● On an extremely bumpy road, on an incline, on gravel, or on grass
● The vicinity of the vehicle is noisy due to vehicle horns, motorcycle
engines, air brakes of large vehicles , or other loud noises producing ultra-
sonic waves.
● The sensor is splashed with water or drenched with heavy rain.
● The sensor is drenched with water on a flooded road.
● The vehicle is leaning considerably to one side.
● The vehicle is equipped with a fender pole or wireless antenna.
● The vehicle is approaching a tall or curved curb.
● The detection range is reduced due to an object such as a sign.
● The area directly under the bumpers is not detected.
● If obstacles draw too close to the sensor.
● The bumper or sensor receives a strong impact.
● A non-genuine Toyota suspension (lowered suspension etc.) is installed.
● There is another vehicle equipped with parking assist sensors in the vicin-
ity.
● Towing eyelets are installed.
● A backlit license plate is installed.
In addition to the examples above, depending on the shape and condition of
obstacles, detection may not be possible, or the detection range may be
shortened.

4705-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
Intelligent Clearance Sonar
The system operates in the following situations when an obstacle is
detected in the traveling direction of the vehicle.
◆The vehicle is driven at low speeds and the brake pedal is not
depressed, or is depressed too late
◆The accelerator pedal is depressed too far
: If equipped
When a collision may occur with an obstacle while parking or
traveling at low speeds, when the vehicle suddenly moves for-
ward due to mistaken accelerator pedal operation, or when the
vehicle moves due to the wrong shift position being selected,
the sensors detect obstacles to the front or rear in the traveling
direction of the vehicle, and the system operates to lessen
impact with obstacles such as walls, and reduce resulting dam-
age.
Examples of system operation

4735-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
When the Intelligent Clearance Sonar function detects an obstacle
with a probability of collision, hybrid system output is restricted to
restrain an increase in vehicle speed. (Hybrid system output restric-
tion control: A)
Furthermore, when the accelerator pedal continues to be depressed,
the brakes are applied to reduce the vehicle speed. (Brake control: B)
Operation

4745-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
DOWN
DOWN
UP
ON
OFF
ON
OFF
ON
OFF
Accelerator pedal
Brake pedal
Hybrid system output
Braking force
Control starts
Collision is possible
Collision is likely
1
2
3
4
5
6
7

4755-5. Using the driving support systems
PRIUS PHV_OM_OM47C99E_(EE)
5
Driving
■Operation starting conditions
When the ICS OFF indicator is not illuminated or flashing (P. 480,
674) and all of the following conditions are met, the system operates.
Hybrid system output restriction control
●The Intelligent Clearance Sonar is on.
●The vehicle speed is 15 km/h (10 mph) or less.
●There is an obstacle in the traveling direction of the vehicle (2 to
4 m [6 to 13 ft.] ahead).
●The system determined that a stronger-than-normal brake opera-
tion was necessary to avoid a collision.
Brake control
●Hybrid system output restriction control is being performed.
●The system determined that an emergency brake operation was
necessary to avoid a collision.
■Operation ending conditions
In any of the following situations, the system stops operating.
Hybrid system output restriction control
●The Intelligent Clearance Sonar function has been turned off
(stopped).
●The collision became avoidable with normal brake operation.
●The obstacle is no longer in the traveling direction of the vehicle
(2 to 4 m [6 to 13 ft.] ahead).
Brake control
●The Intelligent Clearance Sonar function has been turned off
(stopped).
●Approximately 2 seconds elapsed after the vehicle was stopped
by brake control.
●The brake pedal was depressed after the vehicle was stopped by
brake control.
●The obstacle is no longer in the traveling direction of the vehicle
(2 to 4 m [6 to 13 ft.] ahead).
Operation conditions