Toyota Prius Prime (2021 year). Manual in english - part 11

8-1. Essential information

8-1. Essential information

If your vehicle has to be stopped in an

emergency

Steadily step on the brake pedal with both feet and firmly depress it.

Do not pump the brake pedal repeatedly as this will increase the effort
required to slow the vehicle.

Shift the shift position to N.



If the shift position is shifted to N
After slowing down, stop the vehicle in a safe place by the road.
Stop the hybrid system.



If the shift position cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehicle
speed as much as possible.
To  stop  the  hybrid  system,
press  and  hold  the  power
switch  for  2  consecutive  sec-
onds or more, or press it briefly
3 times or more in succession.

Stop the vehicle in a safe place by the road.

Only in an emergency, such as if it becomes impossible to stop
the vehicle in the normal way, stop the vehicle using the follow-
ing procedure:

Press and hold for 2 seconds or
more, or press briefly 3 times or
more

WARNING

■

If the hybrid system has to be turned off while driving

Power assist for the steering wheel will be lost, making the steering wheel
heavier to turn. Decelerate as much as possible before turning off the hybrid
system.

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If the vehicle is trapped in rising water

●

Remove the seat belt first.

●

If the door can be opened, open the door and exit the vehicle.

●

If the door can not be opened, open the window using the power
window switch and exit the vehicle through the window.

●

If the window can not be opened using the power window switch,
remain calm, wait until the water level inside the vehicle rises to the
point that the water pressure inside of the vehicle equals the water
pressure outside of the vehicle, and then open the door and exit the
vehicle.

In the event the vehicle is submerged in water, remain calm and
perform the following.

WARNING

■

Using an emergency hammer

for emergency escape

The rear side windows and rear window of this vehicle can be shattered by
an emergency hammer

used for emergency escape, however, since the

windshield and front side windows are laminated glass they can not be
shattered by an emergency hammer

: Contact your Toyota dealer or aftermarket accessory manufacturer for fur-

ther information about an emergency hammer.

■

Escaping the vehicle from the window

There are cases where escaping the vehicle from the window is not possi-
ble due to seating position, passenger body type, etc.
When using an emergency hammer, consider your seat location and the
size of the window opening to ensure that the opening is accessible and
large enough to escape.

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If your vehicle needs to be towed

In the following situations, it is not possible to be towed by another
vehicle using cables or chains, as the front wheels may be locked due
to the parking lock. Contact your Toyota dealer or commercial towing
service.

●

There is a malfunction in the shift control system. (



P. 342 , 691)

●

There is a malfunction in the immobilizer system. (



P. 83)

●

There is a malfunction in the smart key system. (



●

The 12-volt battery is discharged. (

The following may indicate a problem with your hybrid transmission.
Contact your Toyota dealer or commercial towing service before tow-
ing.

●

The hybrid system warning message is displayed and the vehicle
does not move.

●

The vehicle makes an abnormal sound.

If towing is necessary, we recommend having your vehicle
towed by your Toyota dealer or commercial towing service,
using a wheel-lift type truck or flatbed truck.
Use a safety chain system for all towing, and abide by all state/
provincial and local laws.

Situations when it is not possible to be towed by another vehicle

Situations when it is necessary to contact dealers before towing

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When using a flatbed truck to transport the vehicle, use tire strapping
belts. Refer to the owner’s manual of the flatbed truck for the tire
strapping method.
In order to suppress vehicle movement during transportation, set the
parking brake and turn the power switch off.

If a tow truck is not available in an emergency, your vehicle may be
temporarily towed using cables or chains secured to the emergency
towing eyelets. This should only be attempted on hard surfaced roads
for short distances at under 18 mph (30 km/h).
A driver must be in the vehicle to steer and operate the brakes. The
vehicle’s wheels, drive train, axles, steering and brakes must be in
good condition.

Towing with a wheel-lift type truck



From the front



From the rear

Release the parking brake.

Use a towing dolly under the
front wheels.

Using a flatbed truck

Emergency towing

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To have your vehicle towed by another vehicle, the towing eyelet must
be installed to your vehicle. Install the towing eyelet using the follow-
ing procedure.

Take out the wheel nut wrench and towing eyelet. (

P. 630)

Remove the eyelet cover using
a flathead screwdriver.

To  protect  the  bodywork,  place  a
rag  between  the  screwdriver  and
the  vehicle  body  as  shown  in  the
illustration.

Insert the towing eyelet into the
hole and tighten partially by
hand.

Tighten down the towing eyelet
securely using a wheel nut
wrench or hard metal bar.

When  tightening  with  a  wheel  nut
wrench  or  hard  metal  bar,  make
sure  not  to  damage  the  vehicle
body.

Securely attach cables or chains to the towing eyelet.

Take care not to damage the vehicle body.

Enter the vehicle being towed and start the hybrid system.

If the hybrid system does not start, turn the power switch to ON mode.
Turn off the Parking Support Brake function. (if equipped):

P. 456

Emergency towing procedure

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Shift the shift position to N

and release the parking brake.

: If the shift position cannot be changed or the current shift position can

not be confirmed, contact your Toyota dealer or commercial towing ser-
vice before towing.

■

While towing

If the hybrid system is off, the power assist for the brakes and steering will not
function, making steering and braking more difficult.

■

Wheel nut wrench

Wheel nut wrench is installed in luggage compartment. (



P. 630)

■

Towing eyelet installation hole on the rear of the vehicle

The hole is equipped for fastening the
vehicle while shipping. Your vehicle can-
not tow another vehicle.

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WARNING

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

■

When towing the vehicle

■

While towing

●

When towing using cables or chains, avoid sudden starts, etc. which place
excessive stress on the towing eyelets, cables or chains. The towing eye-
lets, cables or chains may become damaged, broken debris may hit peo-
ple, and cause serious damage.

●

Do not turn the power switch off.
This may lead to an accident as the front wheels will be locked by the
parking lock.

■

Installing towing eyelets to the vehicle

●

The towing eyelets are only for the vehicle equipped with them. Do not use
the towing eyelets for another vehicle, and do not use the towing eyelets
for this vehicle on another vehicle.

●

Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing.

Be sure to transport the vehicle with the
front wheels raised or with all four wheels
raised  off  the  ground.  If  the  vehicle  is
towed  with  the  front  wheels  contacting
the  ground,  the  drivetrain  and  related
parts may be damaged or electricity gen-
erated by the operation of the motor may
cause  a  fire  to  occur  depending  on  the
nature of the damage or malfunction.

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NOTICE

■

To prevent damage to the vehicle when towing using a wheel-lift type
truck

When raising the vehicle, ensure adequate ground clearance for towing at
the opposite end of the raised vehicle. Without adequate clearance, the
vehicle could be damaged while being towed.

■

To prevent damage to the vehicle when towing with a sling-type truck

Do not tow with a sling-type truck, either from the front or rear.

■

To prevent damage to the vehicle during emergency towing

Do not secure cables or chains to the suspension components.

■

Towing with a sling-type truck

Do not tow with a sling-type truck to pre-
vent body damage.

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If you think something is wrong

●

Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)

●

Flat-looking tires or uneven tire wear

●

High coolant temperature warning light flashes or comes on

●

Changes in exhaust sound

●

Excessive tire squeal when cornering

●

Strange noises related to the suspension system

●

Pinging or other noises related to the hybrid system

●

Engine missing, stumbling or running roughly

●

Appreciable loss of power

●

Vehicle pulls heavily to one side when braking

●

Vehicle pulls heavily to one side when driving on a level road

●

Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor

If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.

Visible symptoms

Audible symptoms

Operational symptoms

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If a warning light turns on or a warning

buzzer sounds

Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by your Toyota dealer.

Warning light and warning buzzer list

Warning light

Warning light/Details/Actions

(U.S.A.)

(Canada)

Brake system warning light and warning buzzer (red
indicator)

Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning



Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.

Brake system warning light (yellow indicator)

Indicates a malfunction in:
• The regenerative braking system; or
• The electronically controlled brake system



Have the vehicle inspected by your Toyota dealer
immediately.

Charging system warning light

Indicates a malfunction in the vehicle’s charging system



Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

Low engine oil pressure warning light
(warning buzzer)

Indicates that the engine oil pressure is too low



Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

(U.S.A.)

(Canada)

Malfunction indicator lamp

Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system; or
• The electronic throttle control system



Have the vehicle inspected by your Toyota dealer
immediately.

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SRS warning light

Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system



Have the vehicle inspected by your Toyota dealer
immediately.

(U.S.A.)

(Canada)

ABS warning light

Indicates a malfunction in:
• The ABS; or
• The brake assist system



Have the vehicle inspected by your Toyota dealer
immediately.

(Red/yellow)

Electric power steering system warning light (warning
buzzer)

Indicates a malfunction in the EPS (Electric Power Steer-
ing) system



Have the vehicle inspected by your Toyota dealer
immediately.

(Flashes or

illuminates)

PCS warning light

• When a buzzer sounds simultaneously:

Indicates a malfunction has occurred in the PCS (Pre-
Collision System).



Have the vehicle inspected by your Toyota dealer
immediately.

• When a buzzer does not sound:

The PCS (Pre-Collision System) has become temporar-
ily unavailable, corrective action may be necessary.



Follow the instructions displayed on the multi-infor-
mation display. (



P. 382, 684)

If the PCS (Pre-Collision System) or VSC (Vehicle Stability
Control) system is disabled, the PCS warning light will illu-
minate.



P. 394

(Orange)

LTA indicator (warning buzzer)

Indicates a malfunction in the LTA (Lane Tracing Assist)



Follow the instructions displayed on the multi-infor-
mation display. (



P. 409)

Warning light

Warning light/Details/Actions

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Slip indicator light

Indicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system



Have the vehicle inspected by your Toyota dealer
immediately.

The light will flash when the ABS, VSC or TRAC system is
operating.

High coolant temperature warning light

• When the light flashes:

Indicates that the engine coolant temperature is too high
The light changes from a flashing to a solid light when
the temperature further increases



Immediately stop the vehicle in a safe place. (

P. 721)

• When the light comes on without flashing:

Indicates a malfunction in the exhaust heat recirculator
system



Have the vehicle inspected by your Toyota dealer
immediately.

(Flashes)

(If equipped)

PKSB OFF indicator

Indicates a malfunction in the Parking Support Brake func-
tion



Have the vehicle inspected by your Toyota dealer.

The warning light will operate as follows, even when the
system is not malfunctioning:
• The light will come on when the Parking Support Brake

function is turned off (



P. 456)

• The light will come on when the Parking Support Brake

function is operating (



P. 460)

• The light will flash when the system cannot be temporar-

ily used (



P. 464)

Open door warning light (warning buzzer)

Indicates that a door is not fully closed



Check that all the doors are closed.

Low fuel level warning light

Indicates that remaining fuel is approximately 1.7 gal.
(6.4 L, 1.4 Imp.gal.) or less



Refuel the vehicle.

Warning light

Warning light/Details/Actions

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Driver’s and front passenger’s seat belt reminder light
(warning buzzer)

Warns the driver and/or front passenger to fasten their
seat belts



Fasten the seat belt.
If the front passenger’s seat is occupied, the front
passenger’s seat belt also needs to be fastened to
make the warning light (warning buzzer) turn off.

(U.S.A.)

(Canada)

Rear passengers’ seat belt reminder light (warning
buzzer)

Warns the rear passengers to fasten their seat belts



Fasten the seat belt.

Master warning light

A buzzer sounds and the warning light comes on and
flashes to indicate that the master warning system has
detected a malfunction.



P. 684

Tire pressure warning light

When the light comes on:

Low tire inflation pressure such as

• Natural causes (



P. 680)

• Flat tire (



P. 692)



Adjust the tire inflation pressure to the specified

level.

The light will turn off after a few minutes. In case

the light does not turn off even if the tire inflation

pressure is adjusted, have the system checked by

your Toyota dealer.

When the light comes on after blinking for 1 minute:

Malfunction in the tire pressure warning system

(



P. 681)



Have the system checked by your Toyota dealer.

Warning light

Warning light/Details/Actions

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Brake Override System/Drive-Start Control/
Parking Support Brake function (symbol display)

Brake Override System

Indicates that the accelerator and brake pedals are being
depressed simultaneously, and the Brake Override Sys-
tem is operating



Release the accelerator pedal and depress the brake
pedal.

Indicates a malfunction in the Brake Override System
(with warning buzzer)



Have the vehicle inspected by your Toyota dealer
immediately.

Drive-Start Control

Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accelera-
tor pedal (with warning buzzer)



Momentarily release the accelerator pedal.

Indicates a malfunction in the Drive-Start Control system
(with warning buzzer)



Have the vehicle inspected by your Toyota dealer
immediately.

Parking Support Brake function

Indicates that the Parking Support Brake function (if
equipped) is operating (



P. 460)



Follow the instruction that is displayed on the multi-
information display.

(Canada only)

Low engine oil pressure warning (symbol display)

Indicates that the engine oil pressure is too low



Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

Warning light

Warning light/Details/Actions

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: Brake system warning buzzer:

When there is a possible problem that could affect braking performance,
the warning light will come on and a warning buzzer will sound.

: Low engine oil pressure warning buzzer:

A buzzer also sounds continuously for approximately 30 seconds at maxi-
mum in addition to the low engine oil pressure warning light when the
“READY” indicator is illuminated.

: Open door warning buzzer:

The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).

: Driver’s seat belt warning buzzer:

The driver’s seat belt warning buzzer sounds to alert the driver that his or
her seat belt is not fastened. Once the power switch is turned to ON mode,
the buzzer sounds. If the seat belt is still unfastened, the buzzer sounds
intermittently for a certain period of time after the vehicle reaches a certain
speed.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front
passenger that his or her seat belt is not fastened. If the seat belt is unfas-
tened, the buzzer sounds intermittently for a certain period of time after the
vehicle reaches a certain speed.

: Rear passengers’ seat belt warning buzzer:

The rear passengers’ seat belt warning buzzer sounds to alert the rear
passenger that his or her seat belt is not fastened. If the seat belt is unfas-
tened, the buzzer sounds intermittently for a certain period of time, after
the seat belt is fastened and unfastened and the vehicle reaches a certain
speed.

: This symbol is displayed on the multi-information display.

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■

SRS warning light

This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (front), side
impact sensors (rear), driver’s seat belt buckle switch, front passenger occu-
pant classification system (ECU and sensors), “AIR BAG ON” indicator light,
“AIR BAG OFF” indicator light, front passenger’s seat belt buckle switch, seat
belt pretensioners, airbags, interconnecting wiring and power sources.
(

P. 36)

■

Front passenger detection sensor, seat belt reminder and warning
buzzer

●

If luggage is placed on the front passenger seat, the front passenger detec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.

●

If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.

■

Electric power steering system warning light (warning buzzer)

When the 12-volt battery charge becomes insufficient or the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.

■

If the malfunction indicator lamp comes on while driving

First check the following:

●

Is the fuel tank empty?
If it is, fill the fuel tank immediately.

●

Is the fuel tank cap loose?
If it is, tighten it securely.

The malfunction indicator lamp will go off after several driving trips.
If the malfunction indicator lamp does not go off even after several trips, con-
tact your Toyota dealer as soon as possible.

■

When the tire pressure warning light comes on

Inspect the appearance of the tire to check that the tire is not punctured.
If the tire is punctured:



P. 692

If the tire is not punctured:
Check the tire inflation pressure and adjust to the appropriate level. Initial-

izing the tire pressure warning system will not turn off the tire pressure

warning light.

■

The tire pressure warning light may come on due to natural causes

The tire pressure warning light may come on due to natural causes such

as natural air leaks and tire inflation pressure changes caused by tem-

perature. In this case, adjusting the tire inflation pressure will turn off the

warning light (after a few minutes).

■

Conditions that the tire pressure warning system may not function

properly

P. 619

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■

If the tire pressure warning light frequently comes on after blinking

for 1 minute

If the tire pressure warning light frequently comes on after blinking for

1 minute when the power switch is turned to ON mode, have it checked

by your Toyota dealer.

■

Warning buzzer

In some cases, the buzzer may not be heard due to being in a noisy location
or audio sound.

WARNING

■

When the electric power steering system warning light comes on

When  the  light  comes  on  yellow,  the  assist  to  the  power  steering  is
restricted. When the light comes on red, the assist to the power steering is
lost  and  handling  operations  of  the  steering  wheel  become  extremely
heavy.  When  steering  wheel  operations  are  heavier  than  usual,  grip  the
steering wheel firmly and operate it using more force than usual.

■

If the tire pressure warning light comes on

Be sure to observe the following precautions. Failure to do so could

cause a loss of vehicle control and result in death or serious injury.

●

Stop your vehicle in a safe place as soon as possible. Adjust the tire

inflation pressure immediately.

●

If the tire pressure warning light comes on even after tire inflation pres-

sure adjustment, it is probable that you have a flat tire. Check the tires.

If a tire is flat, repair the flat tire by using emergency tire puncture

repair kit.

●

Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate,

you could lose control of the steering wheel or the brakes.

■

If a blowout or sudden air leakage should occur

The tire pressure warning system may not activate immediately.

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WARNING

■

Maintenance of the tires

Each tire, including the spare (if provided), should be checked monthly

when cold and inflated to the inflation pressure recommended by the

vehicle manufacturer on the vehicle placard or tire inflation pressure

label (tire and load information label). (If your vehicle has tires of a dif-

ferent size than the size indicated on the vehicle placard or tire inflation

pressure label [tire and load information label], you should determine

the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire

pressure monitoring system (TPMS-tire pressure warning system) that

illuminates a low tire pressure telltale (tire pressure warning light) when

one or more of your tires is significantly under-inflated. Accordingly,

when the low tire pressure telltale (tire pressure warning light) illumi-

nates, you should stop and check your tires as soon as possible, and

inflate them to the proper pressure. Driving on a significantly under-

inflated tire causes the tire to overheat and can lead to tire failure.

Under-inflation also reduces fuel efficiency and tire tread life, and may

affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a sub-

stitute for proper tire maintenance, and it is the driver’s responsibility to

maintain correct tire pressure, even if under-inflation has not reached

the level to trigger illumination of the TPMS low tire pressure telltale (tire

pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warn-

ing system) malfunction indicator to indicate when the system is not

operating properly. The TPMS (tire pressure warning system) malfunc-

tion indicator is combined with the low tire pressure telltale (tire pressure

warning light). When the system detects a malfunction, the telltale will

flash for approximately one minute and then remain continuously illumi-

nated. This sequence will continue upon subsequent vehicle start-ups

as long as the malfunction exists. When the malfunction indicator is illu-

minated, the system may not be able to detect or signal low tire pres-

sure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a vari-

ety of reasons, including the installation of replacement or alternate tires

or wheels on the vehicle that prevent the TPMS (tire pressure warning

system) from functioning properly. Always check the TPMS (tire pres-

sure warning system) malfunction telltale after replacing one or more

tires or wheels on your vehicle to ensure that the replacement or alter-

nate tires and wheels allow the TPMS (tire pressure warning system) to

continue to function properly.

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If a warning message is displayed

Master warning light

The  master  warning  light  also
comes  on  or  flashes  in  order  to
indicate  that  a  message  is  cur-
rently being displayed on the multi-
information display.

Multi-information display
Handling method

Follow the instructions of the mes-
sage on the multi-information dis-
play.

If any of the warning messages are shown again after the following
actions have been performed, contact your Toyota dealer.

: The master warning light may not come on or flash when a warning mes-

sage is displayed.

The multi-information display shows warnings of system mal-
functions, incorrectly performed operations, and messages that
indicate a need for maintenance. When a message is shown,
perform the correction procedure appropriate to the message.

When a message about charging is displayed, refer to P. 185.

2
3

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The warning lights and warning buzzers operate as follows depending
on the content of the message. If a message indicates the need for
inspection by a dealer, have the vehicle inspected by your Toyota
dealer immediately.

The operation of the warning lights and warning buzzers may differ
from those stated. In this case, perform the correction procedure
according to the displayed message.

: A buzzer sounds the first time a message is shown on the multi-informa-

tion display.

Messages and warnings

System

warning

light

Warning

buzzer

Warning

Comes on



Sounds

Indicates an important situation, such
as when a system related to driving is
malfunctioning or that danger may
result if the correction procedure is not
performed



Comes on

or flashes

Sounds

Indicates  an  important  situation,  such
as  when  the  systems  shown  on  the
multi-information  display  may  be  mal-
functioning

Flashes



Sounds

Indicates a situation, such as when
damage to the vehicle or danger may
result

Comes on



Does not

sound

Indicates a condition, such as mal-
function of electrical components, their
condition, or indicates the need for
maintenance

Flashes



Does not

sound

Indicates a situation, such as when an
operation has been performed incor-
rectly, or indicates how to perform an
operation correctly

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■

Warning messages

The warning messages explained below may differ from the actual messages
according to operation conditions and vehicle specifications.

■

System warning lights

The master warning light does not come on or flash in the following cases.
Instead, a separate system warning light will come on along with a message
or image shown on the multi-information display.

●

“Antilock Brake System Malfunction Visit Your Dealer”:
The ABS warning light comes on. (



P. 675)

●

“Braking Power Low Visit Your Dealer”:
The brake system warning light (yellow) will come on. (

P. 674)

●

Indicates that a door is not fully closed while the vehicle is stopped.:
The Open door warning light comes on. (

P. 676)

■

If “Visit Your Dealer” is shown

The system or part shown on the multi-information display is malfunctioning.
Have the vehicle inspected by your Toyota dealer.

■

If a message about an operation is shown

●

If a message about an operation of the accelerator pedal or brake pedal is
shown
• A warning message about an operation of the brake pedal may be shown

while the driving assist systems such as PCS (Pre-Collision System) or
the dynamic radar cruise control with full-speed range is operating. If a
warning message is shown, be sure to decelerate the vehicle or follow an
instruction shown on the multi-information display.

• A warning message is shown when Brake Override System operates.

(



P. 322, 689)

• A warning message is shown when Drive-Start Control or Parking Sup-

port Brake function (if equipped) operates (

P. 322, 460). Follow the

instructions on the multi-information display.

●

If a message about an operation of the power switch is shown
An instruction for operation of the power switch is shown when the incorrect
procedure for starting the hybrid system is performed or the power switch is
operated incorrectly. Follow the instructions shown on the multi-information
display to operate the power switch again.

●

If a message about a shift operation is shown
To prevent the shift position from being selected incorrectly or the vehicle
from moving unexpectedly, the shift position may be changed automatically
(



P. 347) or shift operation may be required. In this case, change the shift

position following the instructions on the multi-information display.

●

If a message or image about an open/close state of a part or replenishment
of a consumable is shown
Confirm the part indicated by the multi-information display or a warning light,
and then perform the coping method such as closing the open door or
replenishing a consumable.

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687

PRIUS PRIME_OM_OM47D71U_(U)

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en tro

■

If “See Owner’s Manual” is shown

●

If “Braking Power Low Stop in a Safe Place See Owner’s Manual” is shown,
this may be a malfunction. Immediately stop the vehicle in a safe place and
contact your Toyota dealer. Continuing to drive the vehicle may be danger-
ous.

●

If “Engine Oil Pressure Low” is shown, this may be a malfunction. Immedi-
ately stop the vehicle in a safe place and contact your Toyota dealer.

●

If the following messages are shown, there may be a malfunction. Immedi-
ately have the vehicle inspected by your Toyota dealer.
• “Plug-in charging system malfunction.”
• “Hybrid System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction”
• “Smart Key System Malfunction See Owner’s Manual”

■

If “Shift System Not Active Apply Parking Brake Securely While Parking
See Owner’s Manual” is shown

Indicates a temporary operation failure or malfunction in the shift control sys-
tem. Immediately have the vehicle inspected by your Toyota dealer.
When the message is shown, the hybrid system may not be started or the
shift position may not be changed normally. (Coping method:

P. 691)

■

If “Shift System Malfunction Apply Parking Brake Securely While Park-
ing See Owner’s Manual” is shown

Indicates a malfunction in the shift control system. Immediately have the vehi-
cle inspected by your Toyota dealer.
When the message is shown, the hybrid system may not be started or the
shift position may not be changed normally. (Coping method:

P. 691)

■

If “

Switch Malfunction Apply Parking Brake Securely While Parking

See Owner’s Manual” is shown

The P position switch may not operate. Immediately have the vehicle
inspected by your Toyota dealer.
When parking the vehicle, stop the vehicle on level ground and apply the
parking brake firmly.

■

If “Shift System Malfunction Shifting Unavailable See Owner’s Manual”
is shown

Indicates a malfunction in the shift control system. Immediately have the vehi-
cle inspected by your Toyota dealer.
The shift position may not be shifted from P to other than P.

■

If “Shift System Malfunction Stop in a Safe Place See Owner’s Manual”
is shown

Indicates a malfunction in the shift control system. Immediately have the vehi-
cle inspected by your Toyota dealer.
The shift position may not be changed. Stop the vehicle in a safe place.

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688

PRIUS PRIME_OM_OM47D71U_(U)

■

If “Shift System Malfunction See Owner’s Manual” is shown

Indicates a malfunction in the shift control system. Immediately have the sys-
tem inspected by your Toyota dealer.
The system may not operate properly.

■

If “Low 12-Volt Battery Apply Parking Brake Securely While Parking See
Owner’s Manual” is shown

Indicates that the 12-volt battery charge is insufficient. Charge or replace the
12-volt battery.

●

When the message is shown, the hybrid system may not start or the shift
position may not be changed normally. (Coping method:



P. 691)

●

After charging the 12-volt battery, the message may not go off until the shift
position is changed from P.

■

If “Shifting Unavailable Low 12-Volt Battery See Owner’s Manual” is
shown

Indicates that the shift position cannot be changed because the voltage of the
12-volt battery drops. Charge or replace the 12-volt battery.
(Coping method in the case the 12-volt battery is discharged:

■

If “Hybrid System Overheated. Reduced Output Power.” is shown

The message may be shown when driving under severe operating conditions.
(For example, when driving up a long steep hill or driving up a steep hill in
reverse.)
Coping method:



P. 721

■

If “Maintenance required for Traction battery cooling parts See owner’s
manual” is shown

There is a possibility that the filter may be clogged, the air intake vent may be
blocked or there may be a gap in the duct.

●

When the air intake vents or filters are dirty, clean them by the procedures
on P. 582.

●

When the air intake vents or filters are not dirty and the warning message is
shown, have the vehicle inspected at your Toyota dealer.

■

If “Traction Battery Needs to be Protected Refrain From the Use of
Position” is shown

This message may be displayed when the shift position is in N.
As the hybrid battery (traction battery) can not be charged when the shift
position is in N, shift the shift position to P when the vehicle is stopped.

■

If “Traction Battery Needs to be Protected Shift into

to Restart” is

shown

This message is displayed when the hybrid battery (traction battery) charge
has become extremely low because the vehicle has been left with the N shift
position selected for a certain amount of time.
When operating the vehicle, shift to P and restart the hybrid system.

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689

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

■

If “Shift to

Before Exiting Vehicle” is shown

Message is displayed when the driver’s door is opened without turning the
power switch to off with the shift position in any position other than P.
Shift the shift position to P.

■

If “Shift is in

Release Accelerator Before Shifting” is shown

Message is displayed when the accelerator pedal has been depressed and
the shift position is in N.
Release the accelerator pedal and shift the shift position to D or R.

■

If “Depress Brake When Vehicle is Stopped. Hybrid System may Over-
heat.” is shown

The message may be shown when the accelerator pedal is depressed to hold
the vehicle while the vehicle is stopped on an uphill, etc.
The hybrid system may overheat. Release the accelerator pedal and depress
the brake pedal.

■

If “Shifted to

Stop Vehicle to Shift to

” is shown

If the P position switch is pressed while driving, the shift position is changed
to N and the message is shown. (



P. 347)

■

If “Auto Power OFF to Conserve Battery” is shown

The power switch has been turned off by the automatic power off function.
When starting the hybrid system next time, operate the hybrid system for
approximately 5 minutes to recharge the 12-volt battery.

■

If “Engine Oil Level Low Add or Replace” is displayed

The engine oil level may be low. Check the level of the engine oil, and add
engine oil if necessary. This message may be displayed if the vehicle is
stopped on a slope. Move the vehicle to a level surface and check if the mes-
sage disappears.

■

If “Accelerator and Brake Pedals Pressed Simultaneously” is shown

The accelerator and brake pedals are being depressed simultaneously.
(

P. 322)

Release the accelerator pedal and depress the brake pedal.

■

If a message that indicates the malfunction of front camera is displayed

The following systems may be suspended until the problem shown in the
message is resolved. (



P. 382, 67 4)

●

PCS (Pre-Collision System)

●

LTA (Lane Tracing Assist)

●

AHB (Automatic High Beam)

●

RSA (Road Sign Assist)

●

Dynamic radar cruise control with full-speed range

: If equipped

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690

PRIUS PRIME_OM_OM47D71U_(U)

■

If “Radar Cruise Control Unavailable See Owner’s Manual” is shown

The dynamic radar cruise control with full-speed range system is suspended
temporarily or until the problem shown in the message is resolved. (causes
and coping methods:

P. 382)

■

If “Radar Cruise Control Unavailable” is shown

The dynamic radar cruise control with full-speed range system cannot be
used temporarily. Use the system when it becomes available again.

■

If “Maintenance Required Soon” is displayed (U.S.A. only)

Indicates that all maintenance according to the driven distance on the mainte-
nance schedule

should be performed soon.

Comes on approximately 4500 miles (7200 km) after the message has been
reset.
If necessary, perform maintenance. Please reset the message after the main-
tenance is performed. (



P. 588)

: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual

Supplement” for the maintenance interval applicable to your vehicle.

■

If “Maintenance Required Visit Your Dealer” is displayed (U.S.A. only)

Indicates that all maintenance is required to correspond to the driven distance
on the maintenance schedule

Comes on approximately 5000 miles (8000 km) after the message has been
reset. (The indicator will not work properly unless the message has been
reset.)
Perform the necessary maintenance. Please reset the message after the
maintenance is performed. (



P. 588)

: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual

Supplement” for the maintenance interval applicable to your vehicle.

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691

PRIUS PRIME_OM_OM47D71U_(U)

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en tro

■

If the shift position cannot be changed or the power switch is turned to
ACCESSORY mode even if trying to turn the power switch off when a
warning message is shown

If the 12-volt battery is discharged or the shift control system is malfunction-
ing, the followings may occur.

●

The shift position may not be changed to P.
When parking, stop the vehicle on level ground and apply the parking brake
firmly.

●

The hybrid system may not start.

●

The power switch may be turned to ACCESSORY mode even if trying to
turn the power switch off.
In this case, the power switch may be turned off after applying the parking
brake.

●

The automatic P position selection function (

P. 348) may not operate.

Before turning the power switch off, be sure to press the P position switch
and check that the shift position is in P by the shift position indicator or P
position switch indicator.

■

Warning buzzer

P. 681

NOTICE

■

If “Have Traction Battery Inspected” is shown

The hybrid battery (traction battery) is scheduled to be inspected or
replaced. Have the vehicle inspected by your Toyota dealer immediately.

●

Continuing to drive the vehicle without having the hybrid battery (traction
battery) inspected will cause the hybrid system not to start.

●

If the hybrid system does not start, contact your Toyota dealer immedi-
ately.

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692

PRIUS PRIME_OM_OM47D71U_(U)

If you have a flat tire

Your  vehicle  is  not  equipped  with  a  spare  tire,  but  instead  is
equipped with an emergency tire puncture repair kit.
A puncture caused by a nail or screw passing through the tire
tread  can  be  repaired  temporarily  using  the  emergency  tire
puncture  repair  kit.  (The  kit  contains  a  bottle  of  sealant.  The
sealant  can  be  used  only  once  to  temporarily  repair  one  tire
without removing the nail or screw from the tire.) After temporar-
ily  repairing  the  tire  with  the  kit,  have  the  tire  repaired  or
replaced by your Toyota dealer.

WARNING

■

If you have a flat tire

Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the

wheel beyond repair, which could result in an accident.

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693

PRIUS PRIME_OM_OM47D71U_(U)

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en tro

●

Stop the vehicle in a safe place on a hard, flat surface.

●

Set the parking brake.

●

Shift the shift position to P.

●

Stop the hybrid system.

●

Turn on the emergency flashers.

●

Check the degree of the tire damage.

A  tire  should  only  be  repaired
with  the  emergency  tire  punc-
ture  repair  kit  if  the  damage  is
caused by a nail or screw pass-
ing through the tire tread.

• Do not remove the nail or

screw  from  the  tire.  Remov-
ing the object may widen the
opening  and  make  emer-
gency  repair  with  the  repair
kit impossible.

• To avoid sealant leakage, move the vehicle until the area of the

puncture, if known, is positioned at the top of the tire.

■

A flat tire that cannot be repaired with the emergency tire puncture

repair kit

In the following cases, the tire cannot be repaired with the emergency tire

puncture repair kit. Contact your Toyota dealer.

●

When the tire is damaged due to driving without sufficient air pressure

●

When there are any cracks or damage at any location on the tire, such

as on the side wall, except the tread

●

When the tire is visibly separated from the wheel

●

When the cut or damage to the tread is 0.16 in. (4 mm) long or more

●

When the wheel is damaged

●

When two or more tires have been punctured

●

When more than one sharp objects such as nails or screws have passed

through the tread on a single tire

●

When the sealant has expired

Before repairing the tire

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697

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

Take out the repair kit from the plastic bag.
Remove the valve cap from the
valve of the punctured tire.

Extend the hose. Remove the
air release cap from the hose.

Attach the sticker enclosed with

the bottle on the specified loca-

tions. (See step

You will use the air release cap

again. Therefore keep it in a safe

place.

Connect the hose to the valve.

Screw the end of the hose clock-

wise as far as possible.

Make sure that the compressor
switch is off.

Emergency repair method

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699

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

Connect the bottle to the com-
pressor.

As shown in the illustration, insert

the bottle securely into the com-

pressor until the upper side of the

mark on the bottle is aligned with

the upper end of the notch.

Attach the sticker provided with
the tire puncture repair kit to a
position easily seen from the
driver’s seat.

Check the specified tire inflation
pressure.

Tire inflation pressure is specified

on the label on the driver’s side

pillar as shown. (



P. 737)

Start the hybrid system. (



P. 338)

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700

PRIUS PRIME_OM_OM47D71U_(U)

To inject the sealant and inflate
the tire, turn the compressor
switch on.

Inflate the tire until the specified air pressure is reached.

The sealant will be injected
and the pressure will spike to
between 44 psi (300 kPa,
3.0 kgf/cm

or bar) and

58 psi (400 kPa, 4.0 kgf/cm

or  bar),  then  gradually
decrease.
The  air  pressure  gauge  will
display  the  actual  tire  infla-
tion  pressure  about  1  to  5
minutes  after  the  switch  is
turned on.

• Turn the compressor switch

off and then check the tire
inflation

pressure.

Being

careful  not  to  over  inflate,
check and repeat the inflation
procedure  until  the  specified
tire  inflation  pressure  is
reached.

• The tire can be inflated for about 5 to 20 minutes (depending on

the outside temperature). If the tire inflation pressure is still lower
than the specified point after inflation for 25 minutes, the tire is
too damaged to be repaired. Turn the compressor switch off and
contact your Toyota dealer.

• If the tire inflation pressure exceeds the specified air pressure, let

out some air to adjust the tire inflation pressure. (

P. 703, 737)

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701

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

With the compressor switch off, disconnect the hose from the valve
on the tire and then pull out the power plug from the power outlet
socket.

Some sealant may leak when the hose is removed.

Install the valve cap onto the valve of the emergency repaired tire.
Attach the air release cap to the
end of the hose.

If the air release cap is not

attached, the sealant may leak

and the vehicle may get dirty.

Temporarily store the bottle in the luggage compartment while it is
connected to the compressor.
To spread the liquid sealant evenly within the tire, immediately drive
safely for about 3 miles (5 km) below 50 mph (80 km/h).
After  driving,  stop  your  vehicle
in  a  safe  place  on  a  hard,  flat
surface  and  reconnect  the
repair kit.

Remove the air release cap from

the hose before reconnecting the

hose.

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702

PRIUS PRIME_OM_OM47D71U_(U)

Turn the compressor switch on and wait for several seconds, then
turn it off. Check the tire inflation pressure.

If the tire inflation pressure is
under

19 psi

(130 kPa,

1.3 kgf/cm

or bar): The

puncture cannot be repaired.
Contact your Toyota dealer.
If the tire inflation pressure is
19 psi (130 kPa, 1.3 kgf/cm

or bar) or higher, but less
than the specified air pres-
sure: Proceed to step

If the tire inflation pressure is the specified air pressure (



P. 737):

Proceed to step

Turn the compressor switch on to inflate the tire until the specified
air pressure is reached. Drive for about 3 miles (5 km) and then
perform step

Attach the air release cap to the
end of the hose.

If the air release cap is not

attached, the sealant may leak

and the vehicle may get dirty.

Store the bottle in the luggage compartment while it is connected to
the compressor.
Taking precautions to avoid sudden braking, sudden acceleration
and sharp turns, drive carefully at under 50 mph (80 km/h) to the
nearest Toyota dealer that is less than 62 miles (100 km) away for
tire repair or replacement.

When having the tire repaired or replaced, make sure to tell the Toyota

dealer that the sealant is injected.

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703

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

■

If the tire is inflated to more than the specified air pressure

Disconnect the hose from the valve.

Disconnect the hose from the valve, remove the air release cap from

the hose and then reconnect the hose.
Turn the compressor switch on and wait for several seconds, and then

turn it off. Check that the air pressure indicator shows the specified air

pressure. (

P. 737)

If the air pressure is under the designated pressure, turn the compres-

sor switch on again and repeat the inflation procedure until the speci-

fied air pressure is reached.

■

The valve of a tire that has been repaired

After a tire is repaired with the emergency tire puncture repair kit, the

valve should be replaced.

■

After a tire is repaired with the emergency tire puncture repair kit

●

The tire pressure warning valve and transmitter should be replaced.

●

Even if the tire inflation pressure is at the recommended level, the tire

pressure warning light may come on/flash.

■

Note for checking the emergency tire puncture repair kit

Check the sealant expiry date occasionally.

The expiry date is shown on the bottle. Do not use sealant whose expiry

date has already passed. Otherwise, repairs conducted using the emer-

gency tire puncture repair kit may not be performed properly.

Install the air release cap to the end of

the hose and push the protrusion on

the air release cap into the tire valve

to let some air out.

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704

PRIUS PRIME_OM_OM47D71U_(U)

■

Emergency tire puncture repair kit

●

The emergency tire puncture repair kit is for filling the car tire with air.

●

The sealant has a limited life span. The expiry date is marked on the

bottle. The sealant should be replaced before the expiry date. Contact

your Toyota dealer for replacement.

●

The sealant stored in the emergency tire puncture repair kit can be used

only once to temporarily repair a single tire. If the sealant in the bottle

and other parts of the kit have been used and need to be replaced, con-

tact your Toyota dealer.

●

The compressor can be used repeatedly.

●

The sealant can be used when the outside temperature is from -40°F

(-40°C) to 140°F (60°C).

●

The kit is exclusively designed for size and type of tires originally

installed on your vehicle. Do not use it for tires that a different size than

the original ones, or for any other purposes.

●

If the sealant gets on your clothes, it may stain.

●

If the sealant adheres to a wheel or the surface of the vehicle body, the

stain may not be removable if it is not cleaned at once. Immediately wipe

away the sealant with a wet cloth.

●

During operation of the repair kit, a loud operation noise is produced.

This does not indicate a malfunction.

●

Do not use to check or to adjust the tire pressure.

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705

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

WARNING

■

Do not drive the vehicle with a flat tire

Do not continue driving with a flat tire.

Driving even a short distance with a flat tire can damage the tire and the

wheel beyond repair.
Driving with a flat tire may cause a circumferential groove on the side

wall. In such a case, the tire may explode when using a repair kit.

■

Caution while driving

●

Store the repair kit in the luggage compartment.

Injuries may result in the event of an accident or sudden braking.

●

The repair kit is exclusively only for your vehicle.

Do not use repair kit on other vehicles, which could lead to an accident

causing death or serious injury.

●

Do not use repair kit for tires that are different size than the original

ones, or for any other purpose. If the tires have not been completely

repaired, it could lead to an accident causing death or serious injury.

■

Precautions for use of the sealant

●

Ingesting the sealant is hazardous to your health. If you ingest sealant,

consume as much water as possible, and then immediately consult a

doctor.

●

If sealant gets in eyes or adheres to skin, immediately wash it off with

water. If discomfort persists, consult a doctor.

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706

PRIUS PRIME_OM_OM47D71U_(U)

WARNING

■

When fixing the flat tire

●

Stop your vehicle in a safe and flat area.

●

Do not touch the wheels or the area around the brakes immediately

after the vehicle has been driven.

After the vehicle has been driven, the wheels and the area around the

brakes may be extremely hot. Touching these areas with hands, feet or

other body parts may result in burns.

●

Connect the valve and hose securely with the tire installed on the vehi-

cle. If the hose is not properly connected to the valve, air leakage may

occur as sealant may be sprayed out.

●

If the hose comes off the valve while inflating the tire, there is a risk

that the hose will move abruptly due to air pressure.

●

After inflation of the tire has completed, the sealant may splatter when

the hose is disconnected or some air is let out of the tire.

●

Follow the operation procedure to repair the tire. If the procedures not

followed, the sealant may spray out.

●

Keep back from the tire while it is being repaired, as there is a chance

of it bursting while the repair operation is being performed. If you

notice any cracks or deformation of the tire, turn off the compressor

switch and stop the repair operation immediately.

●

The repair kit may overheat if operated for a long period of time. Do not

operate the repair kit continuously for more than 40 minutes.

●

Parts of the repair kit become hot during operation. Be careful handling

the repair kit during and after operation. Do not touch the metal part

connecting the bottle and the compressor. It will be extremely hot.

●

Do not attach the vehicle speed warning sticker to an area other than

the one indicated. If the sticker is attached to an area where an SRS

airbag is located, such as the pad of the steering wheel, it may prevent

the SRS airbag from operating properly.

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707

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

WARNING

■

Driving to spread the liquid sealant evenly

Observe the following precautions to reduce the risk of accidents.

Failing to do so may result in a loss of vehicle control and cause death

or serious injury.

●

Drive the vehicle carefully at a low speed. Be especially careful when

turning and cornering.

●

If the vehicle does not drive straight or you feel a pull through the

steering wheel, stop the vehicle and check the following.
• Tire condition. The tire may have separated from the wheel.

• Tire inflation pressure. If the tire inflation pressure is 19 psi

(130 kPa, 1.3 kgf/cm

or bar) or less, the tire may be severely dam-

aged.

NOTICE

■

When performing an emergency repair

●

A tire should only be repaired with the emergency tire puncture repair

kit if the damage is caused by a sharp object such as nail or screw

passing through the tire tread.

Do not remove the sharp object from the tire. Removing the object may

widen the opening and disenable emergency repair with the repair kit.

●

The repair kit is not waterproof. Make sure that the repair kit is not

exposed to water, such as when it is being used in the rain.

●

Do not put the repair kit directly onto dusty ground such as sand at the

side of the road. If the repair kit vacuums up dust etc., a malfunction

may occur.

■

Precautions for the emergency tire puncture repair kit

●

The repair kit power source should be 12 V DC suitable for vehicle

use. Do not connect the repair kit to any other source.

●

If fuel splatters on the repair kit, the repair kit may deteriorate. Take

care not to allow fuel to contact it.

●

Place the repair kit in a storage to prevent it from being exposed to dirt

or water.

●

Store the repair kit in the luggage compartment out of reach of chil-

dren.

●

Do not disassemble or modify the repair kit. Do not subject parts such

as the air pressure indicator to impacts. This may cause a malfunction.

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708

PRIUS PRIME_OM_OM47D71U_(U)

NOTICE

■

To avoid damage to the tire pressure warning valves and transmit-

ters

When a tire is repaired with liquid sealants, the tire pressure warning

valve and transmitter may not operate properly. If a liquid sealant is

used, contact your Toyota dealer or other qualified service shop as soon

as possible. After use of liquid sealant, make sure to replace the tire

pressure warning valve and transmitter when repairing or replacing the

tire. (

P. 615)

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709

PRIUS PRIME_OM_OM47D71U_(U)

Wh
en tro

If the hybrid system will not start

One of the following may be the cause of the problem:

●

The charging cable may be attached to the vehicle. (



P. 146)

●

The electronic key may not be functioning properly.

(

●

There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. (



P. 100)

●

There may be a malfunction in the immobilizer system.

(



P. 83)

●

There may be a malfunction in the shift control system.

(

P . 342, 691)

●

The hybrid system may be malfunctioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. How-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. (

P. 710)

●

There is a possibility that the temperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). (

P. 100, 340 )

: 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. (



●

The 12-volt battery terminal connections may be loose or corroded.
(

P. 607)

Reasons for the hybrid system not starting vary depending on
the situation. Check the following and perform the appropriate
procedure:

The hybrid system will not start even though the correct starting
procedure is being followed. (



P. 338)

The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

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710

PRIUS PRIME_OM_OM47D71U_(U)

One of the following may be the cause of the problem:

●

The 12-volt battery may be discharged. (



●

One or both of the 12-volt battery terminals may be disconnected.
(

P. 607)

Contact your Toyota dealer if the problem cannot be repaired, or if repair
procedures are unknown.

When the hybrid system does not start, the following steps can be
used as an interim measure to start the hybrid system if the power
switch is functioning normally.
Do not use this starting procedure 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. Have 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

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If the electronic key does not operate

properly

Use the mechanical key (

P. 277) in order to perform the following

operations:

Locks all the doors
Closes the windows
(turn and hold)

Unlocks the door

Turning  the  key  rearward  unlocks
the  driver’s  door.  Turning  the  key
once  again  within  3  seconds
unlocks the other doors.

Opens the windows
(turn and hold)

: This setting must be customized at your Toyota dealer. (

P. 753)

If communication between the electronic key and vehicle is
interrupted (

P. 295) or the electronic key cannot be used

because the battery is depleted, the smart key system and
wireless remote control cannot be used. In such cases, the
doors can be opened and the hybrid system can be started by
following the procedure below.

Locking and unlocking the doors

1
2

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PRIUS PRIME_OM_OM47D71U_(U)

Depress the brake pedal.
Touch the Toyota emblem side
of the electronic key to the
power switch.

When  the  electronic  key  is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When  the  smart  key  system  is
deactivated  in  customization  set-
ting,  the  power  switch  will  turn  to
ACCESSORY mode.

Firmly depress the brake pedal

and check that

is shown

on the multi-information display.

Press the power switch.

In the event that the hybrid system still cannot be operated, contact
your Toyota dealer.

Starting the hybrid system

IO82PH052

IO82PH053

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■

Locking the charging port lid

Close the charging port lid. (



P. 112)

Lock the doors using the mechanical key. (

The charging port lid can be locked if the steps and are performed
in reverse.

■

Unlocking the charging port lid

Unlock the doors using the mechanical key. (

Open the charging port lid. (

P. 111)

: Vehicles with smart lid & connector locking system only

■

Locking the charging connector

Unlock the doors using the mechanical key. (

Open the charging port lid. (

P. 111)

Insert the charging connector into the charging inlet. (



P. 147)

Push the charging connector lock switch. (



P. 148)

The charging connector will be locked.

■

Unlocking the charging port lid

Unlock the doors using the mechanical key. (

Push the charging connector lock switch. (



P. 150)

The charging connector will be unlocked.

: Vehicles with smart lid & connector locking system only

Locking and unlocking the charging port lid

Locking and unlocking the charging connector

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■

Stopping the hybrid system

Set the parking brake, shift the shift position to P and press the power switch
as you normally do when stopping the hybrid system.

■

Replacing the key battery

As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(

P. 647)

■

Changing power switch modes

Release the brake pedal and press the power switch in step

above. The

hybrid system does not start and modes will be changed each time the switch
is pressed. (



P. 340)

■

When the electronic key does not work properly

●

Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features:

P. 753)

●

Check if battery-saving mode is set. If it is set, cancel the function.
(



P. 294)

WARNING

■

When using the mechanical key and operating the power windows

Operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the win-
dow.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power window.

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If the 12-volt battery is discharged

If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.

Open the hood. (



P. 597)

Remove the engine cover.

Pull up the both ends of the cover
vertically.

The following procedures may be used to start the hybrid sys-
tem if the vehicle’s 12-volt battery is discharged.
You can also call your Toyota dealer or a qualified repair shop.

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PRIUS PRIME_OM_OM47D71U_(U)

Connect the jumper cables according to the following procedure:

Connect a positive jumper cable clamp to the positive (+) battery
terminal on your vehicle.
Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery termi-
nal on the second vehicle.
Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the 12-volt
battery and any moving parts, as shown in the illustration.

Start the engine of the second vehicle. Increase the engine speed
slightly  and  maintain  at  that  level  for  approximately  5  minutes  to
recharge the 12-volt battery of your vehicle.
Maintain  the  engine  speed  of  the  second  vehicle  and  start  the
hybrid  system  of  your  vehicle  by  turning  the  power  switch  to  ON
mode.
Make  sure  the  “READY”  indicator  comes  on.  If  the  indicator  light
does not come on, contact your Toyota dealer.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
To  install  the  engine  cover,  conduct  the  removal  procedure  in
reverse.  After  installing,  check  that  the  fixed  pins  are  inserted
securely.

Once the hybrid system starts, have the vehicle inspected at your
Toyota dealer as soon as possible.

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■

When opening the cover of the positive (+) battery terminal

P. 607

■

Starting the hybrid system when the 12-volt battery is discharged

The hybrid system cannot be started by push-starting.

■

To prevent 12-volt battery discharge

●

Turn off the headlights and the audio system while the hybrid system is off.

●

Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.

■

When the 12-volt battery is removed or discharged

●

Information stored in the ECU is cleared. When the 12-volt battery is
depleted, have the vehicle inspected at your Toyota dealer.

●

Some systems may require initialization. (



P. 765)

■

When removing the 12-volt battery terminals

When the 12-volt battery terminals are removed, the information stored in the
ECU is cleared. Before removing the 12-volt battery terminals, contact your
Toyota dealer.

■

Charging the 12-volt battery

The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the hybrid system may be unable to start. (The
12-volt battery recharges automatically while the hybrid system is operating.)

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■

When recharging or replacing the 12-volt battery

●

In some cases, it may not be possible to unlock the doors using the smart
key system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.

●

The hybrid system may not start on the first attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.

●

Vehicles with smart lid & connector locking system:
It may be impossible to unlock the charging port lid or locking and unlocking
the charging connector immediately after the 12-volt battery is reconnected.
In this case, carry the electronic key on your person and operate the
charging port lid or charging connector lock switch again.

●

The power switch mode is memorized by the vehicle. When the 12-volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt bat-
tery discharged, be especially careful when reconnecting the 12-volt battery.

●

If the 12-volt battery discharges while the shift position is in P, it may not be
possible to shift the shift position to other positions. In this case, the vehicle
cannot be towed without lifting both front wheels because the front wheels
will be locked. (

P. 667)

■

When replacing the 12-volt battery

●

Use a 12-volt battery that conforms to European regulations.

●

Use a 12-volt battery that the case size is same as the previous one (LN1),
20 hour rate capacity (20HR) is equivalent (45Ah) or greater, and perfor-
mance rating (CCA) is equivalent (295A) or greater.
• If the sizes differ, the 12-volt battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehi-

cle is not used is a short time, the 12-volt battery may discharge and the
hybrid system may not be able to start.

●

For details, consult your Toyota dealer.

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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.

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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
your Toyota dealer.

The following may indicate that your vehicle is overheating.

●

The high coolant temperature warning light (

P. 676) 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

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PRIUS PRIME_OM_OM47D71U_(U)

The coolant level is satisfactory if it is between the “MAX” and
“MIN” lines on the reservoir.

Reservoir
“MAX” line
“MIN” line

Add coolant if necessary.

Water can be used in an emer-
gency if coolant is unavailable.

Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from the radiator or hoses.

The fans operate when the temperature setting is adjusted to “LO” and

“A/C” switch (

•

) is turned on immediately after a

cold start. Confirm that the fans are operating by checking the fan sound
and air flow. If it is difficult to check these, turn the “A/C” switch

(

•

) on and off repeatedly. (The fans may not

operate in freezing temperatures.)

: Vehicles with 7-inch display

: Vehicles with 11.6-inch display

If the fans are not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Toyota dealer.

1
2
3

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■

If “Hybrid System Overheated” is shown on the multi-informa-
tion display

Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has cooled down, inspect the hoses and
radiator core (radiator) for any leaks.

Radiator
Cooling fans

If a large amount of coolant
leaks, immediately contact
your Toyota dealer.

The coolant level is satisfactory if it is between the “FULL” and
“LOW” lines on the reservoir.

Reservoir
“FULL” line
“LOW” line

Add coolant if necessary.

Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.

1
2

1
2
3

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PRIUS PRIME_OM_OM47D71U_(U)

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 your Toyota dealer.
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 your Toyota
dealer.

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. 210) 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.

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NOTICE

■

When adding engine/power control unit coolant

Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to
the hybrid system.

■

To prevent damage to the cooling system

Observe the following precautions:

●

Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).

●

Do not use any coolant additive.

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If the vehicle becomes stuck

Set the parking brake and shift the shift position to P. Stop the
hybrid system.
Remove the mud, snow or sand from around the front wheels.
Place wood, stones or some other material under the front wheels
to help provide traction.
Restart the hybrid system.
Shift the shift position to D or R and release the parking brake.
Then, while exercising caution, depress the accelerator pedal.

■

When it is difficult to free the vehicle

Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:

Press

to turn off TRAC. (