horn TOYOTA PRIUS PRIME 2022 Owners Manual

3034-4. Adjusting the steering wheel and mirrors
PRIUS PRIME_OM_OM47E74U_(U)
4
Operation of each component
Steering wheel
Hold the steering wheel and
push the lever down.
Adjust to the ideal position by
moving the steering wheel hori-
zontally and vertically.
After adjustment, pull the lever up
to secure the steering wheel.
To sound the horn, press on or
close to the mark.
Adjustment procedure
IO44PH004
1
IO44PH005
2
Horn

3044-4. Adjusting the steering wheel and mirrors
PRIUS PRIME_OM_OM47E74U_(U)
WARNING
■Caution while driving
Do not adjust the steering wheel while driving.
Doing so may cause the driver to mishandle the vehicle and caus e an acci-
dent, resulting in death or serious injury.
■ After adjusting the steering wheel
Make sure that the steering wheel is securely locked.
Otherwise, the steering wheel may move suddenly, possibly causi ng an
accident, and resulting in death or serious injury. Also, the horn may not
sound if the steering wheel is not securely locked.

448
PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
●When vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of other vehicles or other devices which
produce ultrasonic waves are near the vehicle
● A sensor is coated with a sheet of spray or heavy rain.
● If objects draw too close to the sensor.
● When a pedestrian is wearing clothing that does not reflect ult rasonic waves
(ex. skirts with gathers or frills).
● When objects that are not perpendicular to the ground, not perpendicular to
the vehicle traveling direction, uneven, or waving are in the d etection range.
● Strong wind is blowing
● When driving in inclement weather such as fog, snow or a sandst orm
● When an object that cannot be detected is between the vehicle a nd a
detected object
● If an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front
of the vehicle or runs out from the side of the vehicle
● If the orientation of a sensor has been changed due to a collis ion or other
impact
● When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicy cle carrier, or
snow plow
● If the front of the vehicle is raised or lowered due to the car ried load
● If the vehicle cannot be driven in a stable manner, such as whe n the vehicle
has been in an accident or is malfunctioning
● When tire chains, a compact spare tire or an emergency tire pun cture repair
kit are used.
■ Situations in which the system may operate even if there is no possibil-
ity of a collision
In some situations, such as the following, the system may opera te even
though there is no possibility of a collision.
● When driving toward a banner, flag, low-hanging branch or boom barrier
(such as those used at railroad crossings, toll gates and parking lots)
● When there is a rut or hole in the surface of the road
● When driving on a metal cover (grating), such as those used for drainage
ditches
● When driving up or down a steep slope
●
When driving on a narrow road

PRIUS PRIME_OM_OM47E74U_(U)
4495-5. Using the driving support systems
5
Driving
●If a sensor is hit by a large amount of water, such as when dri ving on a
flooded road
● There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
● A sensor is coated with a sheet of spray or heavy rain
● When driving in inclement weather such as fog, snow or a sandst orm
● When vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of other vehicles or other devices which
produce ultrasonic waves are near the vehicle
● If the front of the vehicle is raised or lowered due to the car ried load
● If the orientation of a sensor has been changed due to a collis ion or other
impact
● Driving close to columns (H-shaped steel beams, etc.) in multi- story parking
garages, construction sites, etc.
● If the vehicle cannot be driven in a stable manner, such as whe n the vehicle
has been in an accident or is malfunctioning
● When tire chains, a compact spare tire or an emergency tire pun cture repair
kit are used.
●
When strong winds are blowing
● On an extremely bumpy road, on an
incline, on gravel, or on grass

PRIUS PRIME_OM_OM47E74U_(U)
4955-5. Using the driving support systems
5
Driving
WARNING
●Observe the following precautions, as the sensors may stop functioning
properly which may lead to an accident.
• Do not subject the sensor to strong shocks by hitting it, etc. The sen-
sors may not function properly.
• When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. Equipment may not function prope rly if
subjected to an impact from strong water pressure. If the vehicle
bumper strikes something, equipment may not operate properly du e to
a sensor malfunction. Have the vehicle inspected at your Toyota dealer.
● In the following situations, the sensors may not operate normally and may
lead to an accident. Drive carefully.
• Obstacles cannot be detected in the side areas until a scan of the side
areas is completed. ( P. 446)
• Even after the scan of the side areas is completed, obstacles such as other vehicles, people or animals that approach from the sides cannot
be detected.
• The sensor is frozen (if it thaws, the system returns to normal). A warning message may display at particularly low temperatures due to
the sensor freezing and it may not detect parked vehicles.
• The sensor is blocked by someone’s hand.
• The vehicle is tilted a large amount.
• The temperature is extremely hot or cold.
• The vehicle is driven on undulating roads, slopes, gravel road s, in areas
with tall grass, etc.
• An ultrasonic wave source is nearby, such as the horn or sensors of another vehicle, a motorcycle engine or the air brake of a larg e vehicle.
• Heavy rain or a water strikes the vehicle.
• The angle of the sensor may be deviated when assist control starts even if there is a parked vehicle in the target parking spot. Have the
vehicle inspected at your Toyota dealer.
• Do not install any accessories within the sensor detection ran ge.

706
PRIUS PRIME_OM_OM47E74U_(U)
8-2. Steps to take in an emergency
If the hybrid system will not start
One of the following may be the cause of the problem:
● The charging cable may be a ttached to the vehicle. (P. 147)
● The electronic key may no t be functioning properly.
* ( P. 708)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle. ( P. 101)
● There may be a malfunction in the immobilizer system.
* ( P. 8 3 )
● There may be a malfunction i n the shift control system.
*
(  P. 336, 688)
● The hybrid system may be malfunc tioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. H ow-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( P. 707)
● There is a possibility that the t emperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( P. 101, 334)
*: It may not be possible to shift the shift position other than P.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 712)
● The 12-volt battery terminal connections may be loose or corrod ed.
(  P. 605)
Reasons for the hybrid system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 332)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.

7078-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47E74U_(U)
8
When trouble arises
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 712)
● One or both of the 12-volt battery terminals may be disconnecte d.
(  P. 605)
Contact your Toyota dealer if the problem cannot be repaired, o r if repair
procedures are unknown.
When the hybrid system does not start, the following steps can be
used as an interim measure to sta rt the hybrid system if the power
switch is functioning normally.
Do not use this starting procedur e except in cases of emergency.
Set the parking brake.
Turn the power switch to ACCESSORY mode.
Press and hold the power switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the
system may be malfunctioning. Hav e the vehicle inspected by your
Toyota dealer.
The interior lights and headlights do not turn on, or the horn
does not sound.
Emergency start function
1
2
3

790Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
Front seats ............................... 296Adjustment ............................ 296
Cleaning................................ 579
Correct driving posture ........... 28
Head restraints ..................... 300
Seat heaters ......................... 535
Front side marker lights.......... 347 Light switch ........................... 347
Replacing light bulbs............. 657
Front turn signal lights ........... 345 Replacing light bulbs............. 657
Turn signal lever ................... 345
Fuel ........................................... 365 Capacity ................................ 728
Fuel gauge ............................ 209
Information ............................ 735
Refueling............................... 365
Type ...................................... 728
Warning light ......................... 673
Fuel consumption.... 233, 264, 269
Average fuel consumption .... 233
Current fuel consumption...... 269
Fuel filler door.......................... 365
Opener .................................. 367
Refueling............................... 365
When the fuel filler door cannot be opened............... 368
Fuses ........................................ 647
Garage door opener ................ 564
Glove box ................................. 541 Hands-free system (for
cellular phone)
*
Head restraints ........................ 300
Head-up display....................... 253
Headlights ................................ 347
AHB (Automatic High Beam)................................. 352
Headlight aim................ 650, 777
Light switch ........................... 347
Replacing light bulbs ............ 657
Heated steering wheel ............ 535
Heaters
Automatic air conditioning system.... 508, 520
Heated steering wheel .......... 535
Hybrid battery (traction battery) ............................... 136
Outside rear view mirrors ........................ 512, 523
Seat heaters ......................... 535
High coolant temperature warning light.......................... 673
High mounted stoplight
Replacing.............................. 657
High-voltage components ........ 99
Hill-start assist control ........... 497
Hood ......................................... 595
Hooks Coat hooks ........................... 562
Grocery bag hook ................. 546
Retaining hooks (floor mat) .... 26
Horn .......................................... 303
HV mode ..................................... 87
G
H