Toyota Prius Prime (2020 year). Owner's manual - part 45

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8-2. Steps to take in an emergency

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.

6

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8-2. Steps to take in an emergency

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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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8-2. Steps to take in an emergency

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. (

P. 490)

1

2

3

4

5

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8-2. Steps to take in an emergency

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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.

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8-2. Steps to take in an emergency

717

9

Vehicle specifications

9-1. Specifications

Maintenance data 

(fuel, oil level, etc.).......... 718

Fuel information ................ 727
Tire information ................. 730

9-2. Customization

Customizable features ...... 741

9-3. Initialization

Items to initialize ............... 752

718

9-1. Specifications

Maintenance data (fuel, oil level, etc.)

*

: Unladen vehicle

Dimensions and weight

Overall length

182.9 in. (4645 mm)

Overall width

69.3 in. (1760 mm)

Overall height

*

57.9 in. (1470 mm)

Wheelbase

106.3 in. (2700 mm)

Tread

*

Front

60.2 in. (1530 mm)

Rear

60.6 in. (1540 mm)

Vehicle capacity weight
(Occupants + luggage)

840 lb. (385 kg)

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9-1. Specifications

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Vehicle identification number
The  vehicle  identification  number  (VIN)  is  the  legal  identifier  for
your  vehicle.  This  is  the  primary  identification  number  for  your
Toyota. It is used in registering the ownership of your vehicle.
This number is stamped on the
top left of the instrument panel.

This  number  is  also  stamped
under the right-hand front seat.

This number is also on the Cer-
tification label.

Vehicle identification

720

9-1. Specifications

■

Engine number
The engine number is stamped
on the engine block as shown.

Engine

Model

1.8 L 4-cylinder (2ZR-FXE)

Type

4-cylinder in line, 4-cycle, gasoline

Bore and stroke

3.17 

 3.48 in. (80.5  88.3 mm)

Displacement

109.7 cu.in. (1798 cm

3

)

Valve clearance

Automatic adjustment

Fuel

Fuel type

Unleaded gasoline only

Octane Rating

87 (Research Octane Number 91) or higher

Fuel tank capacity 
(Reference)

11.4 gal. (43 L, 9.5 Imp.gal.)

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9-1. Specifications

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

Generation/traction motor



Traction motor

Electric motor (generation motor/traction motor)

Type

Permanent magnet synchronous motor

Maximum output

22.5 kW

Maximum torque

29.5 ft•lbf (40 N•m, 4.1 kgf•m)

Type

Permanent magnet synchronous motor

Maximum output

53 kW

Maximum torque

120.2 ft•lbf (163 N•m, 16.6 kgf•m)

Hybrid battery (traction battery)

Type

Lithium-ion battery

Voltage

3.7 V/cell

Capacity

25 Ah

Quantity

95 cells

Nominal voltage

351.5 V

722

9-1. Specifications

■

Oil capacity (Drain and refill [Reference

*

])

*

: The engine oil capacity is a reference quantity to be used when changing

the  engine  oil.  Park  the  vehicle  on  level  ground. After  warming  up  the
engine and turning off the hybrid system, wait more than 5 minutes, and
check the oil level on the dipstick.

■

Engine oil selection
“Toyota  Genuine  Motor  Oil”  is  used  in  your  Toyota  vehicle.  Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to satisfy
the following grade and viscosity.
Oil grade: API SN/RC multigrade engine oil
Recommended viscosity: SAE 0W-16
SAE  0W-16  is  the  best  choice
for  good  fuel  economy  and
good starting in cold weather.
If  SAE  0W-16  is  not  available,
SAE  0W-20  oil  may  be  used.
However,  it  must  be  replaced
with SAE 0W-16 at the next oil
change.

Oil viscosity (0W-16 is explained here as an example):

• The  0W  in  0W-16  indicates  the  characteristic  of  the  oil  which

allows cold startability. Oils with a lower value before the W allow
for easier starting of the engine in cold weather.

• The 16 in 0W-16 indicates the viscosity characteristic of the oil

when the oil is at high temperature. An oil with a higher viscosity
(one  with  a  higher  value)  may  be  better  suited  if  the  vehicle  is
operated at high speeds, or under extreme load conditions.

Lubrication system

With filter

4.4 qt. (4.2 L, 3.7 Imp.qt.)

Without filter

4.1 qt. (3.9 L, 3.4 Imp.qt.)

Outside temperature

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9-1. Specifications

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How to read oil container label:
API registered mark is added to
some oil containers to help you
select the oil you should use.

*

: The coolant capacity is a reference quantity.

If replacement is necessary, contact your Toyota dealer.

Cooling system

Capacity

*

Gasoline
engine

6.3 qt. (6.0 L, 5.3 Imp.qt.)

Power 
control unit

1.6 qt. (1.5 L, 1.3 Imp.qt.)

Coolant type

Use either of the following:

• “Toyota Super Long Life Coolant” 
• Similar  high-quality  ethylene  glycol-

based  non-silicate,  non-amine,  non-
nitrite,  and  non-borate  coolant  with
long-life hybrid organic acid technology

Do not use plain water alone.

Ignition system (spark plug)

Make

DENSO FC16HR-CY9

Gap

0.035 in. (0.9 mm)

NOTICE

■

Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

724

9-1. Specifications

*

: The fluid capacity is the quantity of reference.

If replacement is necessary, contact your Toyota dealer.

Electrical system (12-volt battery)

Open voltage at 68

F (20C):

12.0 V or higher
If  the  voltage  is  lower  than  the  standard
value,  charge  the  battery.  (After  charging
the  battery,  turn  on  the  high  beam  head-
lights for 30 seconds with the power switch
off, and turn the headlights off.)

Charging rates

5 A max.

Transmission

Fluid capacity

*

3.9 qt. (3.7 L, 3.3 Imp.qt.)

Fluid type

Toyota Genuine ATF WS

NOTICE

■

Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause
deterioration in  shift  quality, locking up  of your transmission  accompanied
by vibration, and ultimately damage the transmission of your vehicle.

725

9-1. Specifications

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*

1

: Minimum pedal clearance when depressed with a force of 67.4 lbf (300 N,

30.6 kgf) while the hybrid system is operating.

*

2

: Parking brake pedal travel when depressed with a force of 67.4 lbf (300 N,

30.6 kgf).

Brakes

Pedal clearance

*

1

4.69 in. (119 mm) Min.

Pedal free play

0.04 — 0.24 in. (1.0 — 6.0 mm)

Brake pad wear limit

0.04 in. (1.0 mm)

Parking brake pedal travel

*

2

8 —

11 clicks

Fluid type

SAE  J1703  or  FMVSS  No.116  DOT  3  or
SAE J1704 or FMVSS No.116 DOT 4

Steering

Free play

Less than 1.2 in. (30 mm)

Tires and wheels

Tire size

195/65R15 91S

Tire inflation pressure 

(Recommended cold 

tire inflation pressure)

Front

36 psi (250 kPa, 2.5 kgf/cm

2

 or bar)

Rear

35 psi (240 kPa, 2.4 kgf/cm

2

 or bar)

Spare

None

Wheel size

15 

 6 1/2J

Wheel nut torque

76 ft•lbf (103 N•m, 10.5 kgf•m)

726

9-1. Specifications

Light bulbs

Light bulbs

Bulb No.

W

Type

Exterior

Back-up lights

921

16

A

Interior

Vanity lights



8

A

Front interior/personal lights



5

A

Rear interior light



8

B

Door courtesy lights



5

A

Luggage compartment light



5

A

A: Wedge base bulbs (clear)

B: Double end bulbs

727

9-1. Specifications

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Fuel information

■

Gasoline quality
In very few cases, driveability problems may be caused by the brand of gaso-
line you are using. If driveability problems persist, try changing the brand of
gasoline. If this does not correct the problem, consult your Toyota dealer.

■

Recommendation of the use of gasoline containing detergent additives

●

Toyota recommends the use of gasoline that contains detergent additives to
avoid the build-up of engine deposits.

●

All  gasoline  sold  in  the  U.S.A.  contains  minimum  detergent  additives  to
clean and/or keep clean intake systems, per EPA’s lowest additives concen-
tration program.

●

Toyota  strongly  recommends  the  use  of Top Tier  Detergent  Gasoline.  For
more  information  on Top Tier  Detergent  Gasoline  and  a  list  of  marketers,
please go to the official website www.toptiergas.com.

You must only use unleaded gasoline.
Select octane rating 87 (Research Octane Number 91) or higher.
Use  of  unleaded  gasoline  with  an  octane  rating  lower  than  87
may result in engine knocking. Persistent knocking can lead to
engine damage.

At minimum, the gasoline you use should meet the specifications of
ASTM D4814 in the U.S.A..