Toyota Prius Prime (2020 year). Owner's manual - part 23

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5-3. Operating the lights and wipers

Fog light switch





Type A

Turns the fog lights off

Turns the fog lights on



: If equipped

The fog lights offer improved visibility in difficult driving condi-
tions, such as in rain and fog.

Operating instructions

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5-3. Operating the lights and wipers

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

Type B

Turns the fog lights off

Turns the fog lights on

■

Fog lights can be used when
The headlights are on in low beam.

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NOTICE

■

To prevent 12-volt battery discharge
Do not leave the lights on longer than necessary when the hybrid system is
off.

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5-3. Operating the lights and wipers

Windshield wipers and washer

Operating the 

 lever operates the wipers or washer as follows.

■

Intermittent  windshield  wipers  with  interval  adjuster  (if
equipped)



Type A

Off

Intermittent operation

Low speed operation

High speed operation

Temporary operation



Type B

Off

Intermittent operation

Low speed operation

High speed operation

Temporary operation

Operating the wiper lever

IO53PH023

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5-3. Operating the lights and wipers

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Wiper  intervals  can  be  adjusted  when  intermittent  operation  is
selected.

Increases  the  intermittent
windshield wiper frequency 
Decreases  the  intermittent
windshield wiper frequency

Washer/wiper 

dual

operation

Pulling  the  lever  operates  the
wipers and washer.
The  wipers  will  automatically
operate  a  couple  of  times  after
the washer squirts.

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5-3. Operating the lights and wipers

■

Rain-sensing windshield wipers (if equipped)



Type A

Off

Rain-sensing  opera-

tion

Low speed operation

High speed operation

Temporary operation



Type B

Off

Rain-sensing operation

Low speed operation

High speed operation

Temporary operation

When 

 is selected, the wipers will operate automatically when the

sensor detects falling rain. The system automatically adjusts wiper tim-
ing in accordance with rain volume and vehicle speed. 

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5-3. Operating the lights and wipers

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The sensor sensitivity can be adjusted when 

 is selected.

Increases the sensitivity
Decreases the sensitivity

Washer/wiper 

dual

operation

Pulling  the  lever  operates  the
wipers and washer.
The  wipers  will  automatically
operate  a  couple  of  times  after
the washer squirts.

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5-3. Operating the lights and wipers

■

The windshield wipers and washer can be operated when
The power switch is in ON mode.

■

Dripping prevention wiper sweep (vehicles with rain-sensing windshield
wipers)
After  washing  and  wiping  operation  several  times,  the  wipers  operate  one
more time after a short delay to prevent dripping. However, this function will
not operate while driving.

■

Effects of vehicle speed on wiper operation (vehicles with rain-sensing
windshield wipers)
Vehicle speed affects the Intermittent wiper interval.

■

Raindrop sensor (vehicles with rain-sensing windshield wipers)

●

If the wiper switch is turned to the 

 position while the power switch is in

ON  mode,  the  wipers  will  operate  once  to  show  that AUTO  mode  is  acti-
vated.

●

If the wiper sensitivity is adjusted to higher, the wiper may operate once to
indicate the change of sensitivity.

●

If the temperature of the raindrop sensor is 185

F (85C) or higher, or 14F

(-10

C) or lower, automatic operation may not occur. In this case, operate

the wipers in any mode other than AUTO mode.

■

If no windshield washer fluid sprays
Check that the washer nozzles are not blocked, if there is washer fluid in the
washer fluid tank.

■

Customization
Settings of AUTO mode operation can be changed. 
(Customizable features: 

P. 741)

●

The raindrop sensor judges the amount
of raindrops. 
An optical sensor is adopted. It may not
operate properly when sunlight from the
rising or setting of the sun intermittently
strikes  the  windshield,  or  if  bugs,  etc.
are present on the windshield.

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WARNING

■

Caution regarding the use of windshield wipers in AUTO mode (vehi-
cles with rain-sensing windshield wipers)
The windshield wipers may operate unexpectedly if the sensor is touched or
the windshield is subject to vibration in AUTO mode. Take care that your fin-
gers, etc. do not become caught in the windshield wipers.

■

Caution regarding the use of washer fluid
When it is cold, do not use the washer fluid until the windshield becomes
warm. The fluid may freeze on the windshield and cause low visibility. This
may lead to an accident, resulting in death or serious injury.

NOTICE

■

When the windshield is dry
Do not use the wipers, as they may damage the windshield.

■

When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may over-
heat.

■

When a nozzle becomes blocked
In this case, contact your Toyota dealer.
Do not try to clear it with a pin or other object. The nozzle will be damaged.

■

To prevent 12-volt battery discharge
Do not leave the wipers on longer than necessary when the hybrid system
is off.

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5-4. Refueling

Opening the fuel tank cap

● Turn  the  power  switch  off  and ensure  that all  the  doors  and win-

dows are closed.

● Confirm the type of fuel.

■

Fuel types
P. 727

■

Fuel tank opening for unleaded gasoline
To  help  prevent  incorrect  fueling,  your  vehicle  has  a  fuel  tank  opening  that
only accommodates the special nozzle on unleaded fuel pumps.

The  fuel  tank  of  your  vehicle  has  a  special  structure,  which
requires a reduction in fuel tank pressure before refueling. After
the opener switch has been pressed, it will take several seconds
until the vehicle is ready for refueling.

Before refueling the vehicle

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5-4. Refueling

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WARNING

■

When refueling the vehicle
Observe the following precautions while refueling the vehicle. Failure to do
so may result in death or serious injury.

●

After  exiting  the  vehicle  and  before  opening  the  fuel  door,  touch  an
unpainted metal surface to discharge any static electricity. It is important to
discharge static electricity before refueling because sparks resulting from
static electricity can cause fuel vapors to ignite while refueling.

●

Always hold the grips on the fuel tank cap and turn it slowly to remove it. 
A  whooshing  sound  may  be  heard  when  the  fuel  tank  cap  is  loosened.
Wait until the sound cannot be heard before fully removing the cap. In hot
weather, pressurized fuel may spray out of the filler neck and cause injury.

●

Do  not  allow  anyone  that  has  not  discharged  static  electricity  from  their
body to come close to an open fuel tank.

●

Do not inhale vaporized fuel.
Fuel contains substances that are harmful if inhaled.

●

Do not smoke while refueling the vehicle.
Doing so may cause the fuel to ignite and cause a fire.

●

Do not return to the vehicle or touch any person or object that is statically
charged.
This may cause static electricity to build up, resulting in a possible ignition
hazard.

■

When refueling
Observe the following precautions to prevent fuel overflowing from the fuel
tank:

●

Securely insert the fuel nozzle into the fuel filler neck.

●

Stop filling the tank after the fuel nozzle automatically clicks off.

●

Do not top off the fuel tank.

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5-4. Refueling

Press  the  opener  to  open  the
fuel filler door.

The fuel filler door will open within
about  10  seconds  of  the  switch
being  pressed.  Before  refueling  is
possible, a message will be shown
on  the  multi-information  display  in
the  instrument  cluster  to  indicate
the  progress  of  the  fuel  filler  door
opener.

Turn the fuel tank cap slowly to
open and hang it on the back of
the fuel filler door.

NOTICE

■

Refueling

●

Finish  refueling  within  30  minutes.  If  more  than  30  minutes  passes,  the
internal valve closes. In this condition, fuel may overflow during the refuel-
ing process. 
Press the fuel filler door opener switch again.

●

Do not spill fuel during refueling. 
Doing so may damage the vehicle, such as causing the emission control
system to operate abnormally or damaging fuel system components or the
vehicle’s painted surface.

■

Notice about fuel
P. 104

Opening the fuel tank cap

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■

When the fuel filler door cannot be opened by pressing the inside switch

Using  the  lever  to  open  the  fuel  filler  door  may  not  allow  for  an  adequate
reduction in fuel tank pressure before refueling. To prevent fuel from spilling
out, turn the cap slowly when removing it. 
During refueling, fuel may spill out from the filler opening due to air being dis-
charged  from  inside  the  fuel  tank. Therefore,  fill  the  fuel  tank  carefully  and
slowly.

Open  the  back  door  and  remove  the
cover underneath the luggage compart-
ment light.

Pull the lever backward and check that
the fuel lid opens.

NOTICE

■

When refueling

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When  refueling  your  vehicle,  make  sure
that the fuel filler door lock is not pushed
by the fuel nozzle boot, etc., as this may
cause a valve to close, possibly resulting
in a fuel spill.
If  the  fuel  filler  door  lock  has  been
pushed,  operate  the  fuel  filler  door
opener switch in the vehicle before con-
tinuing to refuel.

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5-4. Refueling

After  refueling,  turn  the  fuel  tank
cap  until  you  hear  a  click.  Once
the  cap  is  released,  it  will  turn
slightly in the opposite direction.

Closing the fuel tank cap

WARNING

■

When replacing the fuel tank cap
Do not use anything but a genuine Toyota fuel tank cap designed for your
vehicle.  Doing  so  may  cause  a  fire  or  other  incident  which  may  result  in
death or serious injury.

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5-5. Using the driving support systems

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Toyota Safety Sense P

◆

PCS (Pre-Collision System)

P. 381

◆

LDA (Lane Departure Alert with steering control)

P. 393

◆

Automatic High Beam

P. 355

◆

Dynamic radar cruise control with full-speed range

P. 403

The Toyota Safety Sense P consists of the following drive assist
systems and contributes to a safe and comfortable driving expe-
rience:

WARNING

■

Toyota Safety Sense P
The Toyota  Safety  Sense  P  is  designed  to operate  under  the  assumption
that the driver will drive safely, and is designed to help reduce the impact to
the occupants and the vehicle in the case of a collision or assist the driver in
normal driving conditions. 
As there is a limit to the degree of recognition accuracy and control perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicle’s surround-
ings and driving safely.

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5-5. Using the driving support systems

The  pre-collision  system  is  equipped  with  a  sophisticated  computer
that will record certain data, such as:

• Accelerator status
• Brake status
• Vehicle speed
• Operation status of the pre-collision system functions
• Information (such as the distance and relative speed between your

vehicle and the vehicle ahead or other objects)

• Images from the camera sensor (available only when the pre-colli-

sion braking function or the pre-collision brake assist function was
operating)

The  pre-collision  system  does  not  record  conversations,  sounds  or
images of the inside of the vehicle.
● Data usage

Toyota  may  use  the  data  recorded  in  this  computer  to  diagnose
malfunctions,  conduct  research  and  development,  and  improve
quality.
Toyota will not disclose the recorded data to a third party except:

• With the consent of the vehicle owner or with the consent of the

lessee if the vehicle is leased

• In response to an official request by the police, a court of law or a

government agency

• For use by Toyota in a lawsuit
• For  research  purposes  where  the  data  is  not  tied  to  a  specific

vehicle or vehicle owner

● Recorded images can be erased using a specialized device.

The image recording function can be disabled. However, if the func-
tion is disabled, data from when the pre-collision system operates
will not be available.

Vehicle data recording

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5-5. Using the driving support systems

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Two types of sensors, located behind the front grille and windshield,
detect information necessary to operate the drive assist systems.

Radar sensor
Camera sensor

Sensors

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