warning TOYOTA PRIUS PLUG-IN HYBRID 2020 Owners Manual

7598-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
8
When trouble arises
WARNING
■ When removing the 12-volt battery terminals
Always remove the negative (-) terminal first. If the positive (+) terminal con-
tacts any metal in the surrounding area when the positive (+) terminal is
removed, a spark may occur, leading to a fire in addition to electrical shocks
and death or serious injury.
■ Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the 12-volt battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the intended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come into contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the 12-volt battery.
■ 12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte,
while related parts contain lead and lead compounds. Observe the following
precautions when handling the 12-volt battery:
● When working with the 12-volt battery, always wear safety glasses and
take care not to allow any battery fluids (acid) to come into contact with
skin, clothing or the vehicle body.
● Do not lean over the 12-volt battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the 12-volt battery support, termi-
nals, and other battery-related parts.
● Do not allow children near the 12-volt battery.

7618-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
8
When trouble arises
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has cooled down sufficiently, inspect the
hoses and radiator core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
any authorized Toyota retailer
or Toyota authorized repairer,
or any reliable repairer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light (P. 716) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
● “Hybrid System Overheated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

7648-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check if “Hybrid System
Overheated” is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the message appears again frequently, contact any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
WARNING
■ To prevent an accident or injury when inspecting under the hood of
your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the “Accessory”,
“Ignition ON” or mileage display ( P. 223) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir caps while the hybrid system and radi-
ator are hot.
High temperature steam or coolant could spray out.
6

7678-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
8
When trouble arises
WARNING
■ When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the
surrounding area is clear to avoid striking other vehicles, objects or people.
The vehicle may also lunge forward or lunge back suddenly as it becomes
free. Use extreme caution.
■ When changing the shift position
Be careful not to change the shift position with the accelerator pedal
depressed.
This may lead to unexpected rapid acceleration of the vehicle that may
cause an accident resulting in death or serious injury.
NOTICE
■ To avoid damage to the hybrid transmission and other components
● Avoid spinning the front wheels and depressing the accelerator pedal
more than necessary.
● If the vehicle remains stuck even after these procedures are performed,
the vehicle may require towing to be freed.

7859-2. Customization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
9
Vehicle specifications
■Power windows (P. 352)
■Reverse warning buzzer (P. 382)
■Turn signal lever (P. 385)
FunctionDefault
settingCustomized
setting
Mechanical key linked opera-
tion (open)Off On – – O
Mechanical key linked opera-
tion (close)Off On – – O
Wireless remote control linked
operation (open)Off On – – O
Wireless remote control linked
operation (close)Off On – – O
Mechanical key, wireless
remote control linked opera-
tion signal (buzzer)On Off – – O
123
FunctionDefault
settingCustomized
setting
Signal (buzzer) when the shift
position is in RSingleIntermittent––O
123
FunctionDefault
settingCustomized
setting
Times of flashing of the lane
change signal flashers3Off
––O 5
7
123

7909-2. Customization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Illumination (P. 591)
■Charge settings
■Maintenance system
FunctionDefault
settingCustomized
setting
Time elapsed before the inte-
rior lights turn off15 secondsOff
–OO 7.5 seconds
30 seconds
Operation after the power
switch is turned offOnOff––O
Operation when the doors are
unlockedOnOff––O
Operation when you approach
the vehicle with the electronic
key on your person
OnOff––O
Footwell lighting On Off – – O
Interior lights illumination con-
trolOn Off – – O
123
Charge scheduleSetting the charging schedule: P. 179
Charge currentChanging the upper limit of the charging cur-
rent: P. 150
Traction battery heaterSetting “Traction Battery Heater” on/off:
P. 155
Tire pressure warning
systemInitializing the tire pressure warning system:
P. 651

7919-2. Customization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
9
Vehicle specifications
■ In the following situations, customize mode in which the settings can be
changed through the multi-information display will automatically be
turned off.
● The power switch is turned off.
● The vehicle begins to move while the customize mode screen is displayed.
WARNING
■Cautions during customization
As the hybrid system needs to be operating during customization, ensure
that the vehicle is parked in a place with adequate ventilation. In a closed
area such as a garage, exhaust gases including harmful carbon monoxide
(CO) may collect and enter the vehicle. This may lead to death or a serious
health hazard.
NOTICE
■ During customization
To prevent 12-volt battery discharge, ens ure that the hybrid system is oper-
ating while customizing features.

7929-3. Initialization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Items to initialize
The following items must be initialized for normal system opera-
tion after such cases as the 12-volt battery being reconnected,
or maintenance being performed on the vehicle:
ItemWhen to initializeReference
Power windowWhen functioning abnormallyP. 353
Parking Support Brake func-
tion (if equipped)After reconnecting or chang-
ing the 12-volt batteryP. 520
S-IPA (Simple Intelligent
Parking Assist System) (if
equipped)After reconnecting or chang-
ing the 12-volt batteryP. 548
Tire pressure warning sys-
tem
• When rotating the tires on
vehicles with differing front
and rear tire inflation pres-
sures
• When changing the tire infla-
tion pressure by changing
traveling speed or load
weight, etc.
P. 651

796What to do if... (Troubleshooting)
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
●The seat belt reminder light is flashing
Are the driver and all the passengers wearing the seat belts? (P. 720)
●The parking brake indicator is on
Is the parking brake released? (P. 386)
Depending on the situation, other types of warning buzzer may also sound.
(P. 714, 723)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (P. 87)
To stop the alarm, turn the power switch to ON mode or start the hybrid sys-
tem.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. (P. 723)
●When a warning light turns on or a warning message is displayed, refer to
P. 714, 723.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
(vehicles with alarm)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

798Alphabetical index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Alphabetical index
A/C............................................. 572
Air conditioning filter.............. 681
Automatic air conditioning
system ................................ 572
Blower customization ............ 576
Eco score (A/C score) ........... 254
Front seat concentrated
airflow mode (S-FLOW)...... 575
Humidity sensor .................... 584
Remote Air Conditioning
System................................ 585
ABS (Anti-lock Brake
System) .................................. 559
Function ................................ 559
Warning light ......................... 715
AHS (Adaptive High-beam
System) .................................. 391
Air conditioning filter .............. 681
Air conditioning system .......... 572
Air conditioning filter.............. 681
Automatic air conditioning
system ................................ 572
Blower customization ............ 576
Eco score (A/C score) ........... 254
Front seat concentrated
airflow mode (S-FLOW)...... 575
Humidity sensor .................... 584
Remote Air Conditioning
System................................ 585
Air intake vent .......................... 109
Cleaning ................................ 623Airbag manual on-off
system ...................................... 51
Airbags ....................................... 39
Airbag manual on-off
system .................................. 51
Airbag operating conditions .... 45
Airbag precautions for your
child ...................................... 41
Airbag warning light .............. 715
Correct driving posture ........... 32
Curtain shield airbag
operating conditions ............. 45
Curtain shield airbag
precautions........................... 43
General airbag precautions .... 41
Locations of airbags................ 39
Modification and disposal of
airbags.................................. 44
Side airbag operating
conditions ............................. 45
Side airbag precautions .......... 42
Side and curtain shield
airbags operating
conditions ............................. 45
Side and curtain shield
airbags precautions .............. 43
SRS airbags............................ 39
Alarm .......................................... 87
Alarm ...................................... 87
Intrusion sensor ...................... 90
A