2021 TOYOTA PRIUS Owners Manual (in English)

PRIUS_OM_OM47E09U_(U)
4094-5. Using the driving support systems
4
Driving
■Tips for using the back-in parking assist mode ●Depending on the condition of the park-
ing space, if there is not enough space
in front of the vehicle required to perform
the parking operation, the target parking
spot may not be reachable.
Intended parking spot
Wall
● Leave a gap of approximately 3.3 ft.
(1 m) from any parked vehicles and
approach the target parking spot. If the
gap between your vehicle and any
parked vehicles is too large, the front
side sensors and rear side sensors may
not be able to detect the parked vehi-
cles.
● Stop so that the center of the target
parking spot is perpendicular to the vehi-
cle. Furthermore, only push the S-APGS
switch when the vehicle is at a complete
stop.
NOTICE
●If the road surface has any dips or inclines, the target parking spot cannot
be correctly set. Therefore, the vehicle may be parked at an an gle or may
deviate from the parking spot. In these cases, do not use the back-in park-
ing assist mode.
● When parking in a narrow space, the vehicle will come close to adjacent
vehicles. If it seems the vehicle may make contact, stop the ve hicle by
depressing the brake pedal.
● It may not be possible to detect objects that are low to the gr ound. Directly
confirm the safety of your surroundings and, if it seems the vehicle may
make contact with an obstacle, stop the vehicle by depressing the brake
pedal.
● Depending on the surrounding environment, such as other parked vehi-
cles, the vehicle may be parked at an angle or may deviate from the park-
ing spot. Manually adjust vehicle alignment as necessary.
1
2
3.3 ft.
(1 m)

410
PRIUS_OM_OM47E09U_(U)
4-5. Using the driving support systems
When the Simple Advanced Park ing Guidance System cannot be
operated, or when operation is stopped, canceled, etc., the one of the
following message is displayed on the multi-information display . Take
appropriate action acc ording to the display.
■When it is not possible to operate
Multi-information display messages
MessageSituation/Handling method
The system may be malfunctioning.
 Turn the power switch off and then start the
hybrid system.
Have the vehicle inspected by your Toyota
dealer if the message is displayed again.
There may be a system failure.
Power steering equipment is temporarily overheat-
ing.
Turn the power switch off, wait for a little
while, and then start the hybrid system again.
The hybrid system is not operating.
Start the hybrid system.
Ice, snow, dirt, etc., has adhered to the sensor.
Remove any ice, snow, dirt, etc.
The sensor is frozen.
Once the sensor thaws, the system will return
to normal.
The 12-volt battery has been removed and rein-
stalled.
Drive the vehicle straight ahead for 5 seconds
or more at a speed of approximately 22 mph
(35 km/h) or higher.
The S-APGS switch is operated when the vehicle
speed exceeds 19 mph (30 km/h).
Operate the switch when the vehicle speed is
approximately 19 mph (30 km/h) or less.
Assist control is started while the steering wheel is
held.
Rest your hands on the steering wheel with-
out applying any force. Assist control will
start.

PRIUS_OM_OM47E09U_(U)
4114-5. Using the driving support systems
4
Driving
The vehicle is moved and assist control is started
while the steering wheel is held.
Stop the vehicle and follow the guidance pro-
vided by the system to start assist control.
The S-APGS switch is operated when there is not
enough space to the front and rear of the vehicle
when departing from a parallel parking spot.
The vehicle cannot depa rt using assist con-
trol as there is not enough space to the front
and rear of the vehicle . Confirm the safety of
your surroundings before departing.
The S-APGS switch is operated in an area where
there are no obstacles to the front of the vehicle, or
there are obstacles to the sides and the vehicle can-
not depart from the parallel parking spot.
 Assist control cannot be used for departure,
as there are obstacles to the sides of the vehi-
cle or departure can easily be performed man-
ually. Confirm the safety of your surroundings
before departing.
The S-APGS switch is operated in an area with no
parking spaces, or operated in an area where the
road width for parking is narrow.
Assist control cannot be used, as there is no
parking space. Proceed to a parking space
which width is approximately 8.5 ft. (2.6 m) or
larger.
 Assist control cannot be used, as the road
width is narrow. Proceed to a parking space
where the road width is approximately 15 ft.
(4.5 m) or larger.
The S-APGS switch is operated at a space that is
too narrow for the vehicle to park in.
Assist control cannot be used, as there is no
parking space. Proceed to a parking space
that is approximately 8.5 ft. (2.6 m) or larger.
MessageSituation/Handling method

412
PRIUS_OM_OM47E09U_(U)
4-5. Using the driving support systems
■When the operation is canceled
The S-APGS switch is operated in an area where
there are obstacles to the front, and the vehicle can-
not move forward to the starting point for backing
up.
Assist control cannot b e used, as there are
obstacles in front of the vehicle. Use parking
spaces that have no obstacles in front of
them.
MessageSituation/Handling method
MessageSituation/Handling method
While assist control is operating, the driver changes
the shift position to P or operates the S-APGS
switch.
The vehicle speed exceeds 19 mph (30 km/h) when
searching for a parallel parking assist mode space.
Assist control is started in an area with narrow park-
ing spaces.
The shift position is changed without having used
the turn signal lever to select a departure direction
when using the exit parallel parking assist mode.
 Follow the guidance provided by the system.
When assist control starts, the vehicle proceeds in a
direction opposite to the guidance.
Follow the guidance provided by the system
to proceed forward.

PRIUS_OM_OM47E09U_(U)
4134-5. Using the driving support systems
4
Driving
■When the operation is suspended
The maximum number of movements for multi-turn
maneuvering is reached during assist control, or the
target parking spot cannot be reached due to the
control being used on a road with steep grade.
Follow the assist control guidance and use
the system in a wide space that does not have
a steep grade.
MessageSituation/Handling method
MessageSituation/Handling method
The driver holds the
steering wheel during
assist control. 
Stop the vehicle and
rest your hands on the
steering wheel without
applying any force.
Then press the S-APGS
switch to restart assist
control.
The vehicle speed
exceeds 4 mph
(7 km/h) during assist
control.
The S-APGS switch
is pressed while
assist control is tem-
porarily stopped and
the steering wheel is
firmly held. 
Rest your hands on the
steering wheel without
applying any force.
Then stop the vehicle to
restart assist control.
The S-APGS switch
is pressed while
assist control is tem-
porarily stopped and
the vehicle is moving.
Assist control is tem-
porarily stopped
(able to be restarted) 
Stop the vehicle and
rest your hands on the
steering wheel without
applying any force.
Then press the S-APGS
switch to restart assist
control.

414
PRIUS_OM_OM47E09U_(U)
4-5. Using the driving support systems
The vehicle moved
too close to an obsta-
cle in front of the
vehicle.Press the S-APGS
switch after changing
the shift position to R to
restart assist control.
The vehicle moved
too close to an obsta-
cle to the rear of the
vehicle.Press the S-APGS
switch after changing
the shift position to D to
restart assist control.
MessageSituation/Handling method

PRIUS_OM_OM47E09U_(U)
4154-5. Using the driving support systems
4
Driving
■Sensors
Detect the vehicle to help determine the parking spot.
Front side sensors
Rear side sensors
Precautions during use
1
2
● The sensor detection range when using
back-in parking assist mode
Intended parking spot
● The sensor detection range when using
parallel parking assist mode
Intended parking spot
1
1

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PRIUS_OM_OM47E09U_(U)
4-5. Using the driving support systems
●When there is a parked vehicle behind the target parking spot, it may not be
detected due to the distance. Also, depending on the shape of t he vehicle
and other conditions, the detectable range may shorten or detec tion may
not be possible.
● The Simple Advanced Parking Guidance System may not operate if grating,
diamond plates or similar materials are detected on the surface of the park-
ing space.
●
Objects other than parked vehicles, such
as poles and walls, may not be detected.
Also, even if these objects can be
detected, the target parking spot may
deviate.
Poles
Wall
● Also, the target parking spot may devi-
ate when a pedestrian, etc. is detected.
Pedestrian
1
2
1