2023 TOYOTA PRIUS PRIME oil

5007-3. Do-it-yourself maintenance
Radiator and
condenser
( P.508)

Tire inflation
pressure
( P.532)• Tire pressure
gauge
• Compressed air source
Washer fluid
( P.510)
• Water or washer
fluid containing
antifreeze (for win-
ter use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains
many mechanisms and fluids that
may move suddenly, become hot,
or become electrically energized.
To avoid death or serious injury,
observe the following precautions.
■When working on the engine
compartment
●Make sure that “POWER ON”
on the meter and the “READY”
indicator are both off.
●Keep hands, clothing and tools
away from the moving fan.
●Be careful not to touch the
engine, power control unit, radi-
ator, exhaust manifold, etc. right
after driving as they may be hot.
Oil and other fluids may also be
hot.
●Do not leave anything that may
burn easily, such as paper and
rags, in the engine compart-
ment.
ItemsParts and tools●Do not smoke, cause sparks or
expose an open flame to fuel or
the battery. Fuel and battery
fumes are flammable.
■When working near the elec-
tric cooling fan or radiator
grille
Be sure the power switch is OFF.
With the power switch in ON, the
electric cooling fan may automati-
cally start to run if the air condi-
tioning is on and/or the coolant
temperature is high. ( P.508)
■Safety glasses
Wear safety glasses to prevent
flying or falling material, fluid
spray, etc., from getting in your
eyes.
NOTICE
■If you remove the air cleaner
filter
Driving with the air cleaner filter
removed may cause excessive
engine wear due to dirt in the air.

5047-3. Do-it-yourself maintenance
Engine oil filler cap (P.506)
Engine oil level dipstick ( P.504)
Brake fluid reservoir ( P.509)
Fuse boxes ( P.540)
Washer fluid tank ( P.510)
Radiator ( P.508)
Electric cooling fan
Condenser ( P.508)
Power control unit coolant reservoir ( P.507)
Engine coolant reservoir ( P.507)
■12-volt battery
 P.511
With the engine at operating
temperature and turned off,
check the oil level on the dip-
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
Checking the engine oil

5057-3. Do-it-yourself maintenance
7
Maintenance and care
stick.
1Park the vehicle on level
ground. After warming up the
engine and turning off the
hybrid system, wait about 5
minutes for the oil to drain
back into the bottom of the
engine.
2 Holding a rag under the end,
pull the dipstick out.
3 Wipe the dipstick clean.
4 Reinsert the dipstick fully.
5 Holding a rag under the end,
pull the dipstick out and
check whether the oil level is
above low level mark.
Low level mark
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
6Wipe the dipstick and reinsert
it fully.
■Engine oil consumption
A certain amount of engine oil will
be consumed while driving. In the
following situations, oil consump-
tion may increase, and engine oil
may need to be re filled in between
oil maintenance intervals.
●When the engine is new, for
example directly after purchasing
the vehicle or after replacing the
engine
●If low quality oil or oil of an inap-
propriate viscosity is used
●When driving at high engine
speeds or with a heavy load, or
when driving while accelerating or
decelerating frequently
●When leaving the engine idling for
a long time, or when driving fre-
quently through heavy traffic
■Engine oil level rise
If the vehicle is repeatedly driven
without the engine warmed up,
moisture caused by dew condensa-
tion inside the engine or fuel which
did not burn mixes into the engine
oil, resulting in a rise in engine oil
level.
However, this is not a malfunction.
For example, the engine become
difficult to be warmed up in the fol-
lowing situations.
●When driving a short distance
●When driving at a low speed
●When the outside temperature is
low
When checking the engine oil, make
A
NOTICE
■To prevent serious engine
damage
Check the oil le vel on a regular
basis.

5067-3. Do-it-yourself maintenance
sure that the engine is warmed up. If
the engine oil level exceeds the refill
upper limit mark, contact your
Toyota dealer.
■Checking the oil type and
preparing the items needed
Make sure to check the oil type
and prepare the items needed
before adding oil.
 Engine oil selection
P.602
 Oil quantity (Low level mark
 Refill upper limit mark)
1.6 qt. (1.5 L, 1.3 Imp. qt.)
 Item
Clean funnel
■Adding engine oil
If the oil level is below or near
the low level mark, add engine
oil of the same type as that
already in the engine.
1 Remove the oil filler cap by
turning it counterclockwise.
2 Add engine oil slowly, check-
ing the dipstick.
Make sure that the oil level does
not exceed the refill upper limit mark and is between the low level
mark and refill upp
er limit mark.
Low level mark
Refill upper limit mark
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
3Install the oil filler cap by
turning it clockwise.
■After changing the engine
oil
The engine oil maintenance
data should be reset. Perform
the following procedures:
1 Press or of the meter
control switches and select
on the multi-information
display.
2 Press or of the meter
control switches and select
“ Vehicle Settings”. Then
press and hold .
3 Press or of the meter
control switches and select
“Oil Maintenance”. Then
press .
4 Select “Yes” and press .
Adding engine oil
A
B

5077-3. Do-it-yourself maintenance
7
Maintenance and care
The coolant level is satisfactory
if it is between the “MAX” and
“MIN” lines on the reservoir
when the hybrid system is cold.
■Engine coolant reservoirReservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line. ( P.594)
■Power control unit coolant
reservoir
Reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
WARNING
■Used engine oil
●Used engine oil contains poten-
tially harmful contaminants
which may cause skin disorders
such as inflammation and skin
cancer, so care should be taken
to avoid prolonged and
repeated contact. To remove
used engine oil from your skin,
wash thoroughly with soap and
water.
●Dispose of used oil and filters
only in a safe and acceptable
manner. Do not dispose of used
oil and filters in household trash,
in sewers or onto the ground.
Call your Toyota dealer, service
station or auto parts store for
information concerning recy-
cling or disposal.
●Do not leave used engine oil
within the reach of children.
NOTICE
■When replacing the engine oil
●Be careful not to spill engine oil
on the vehicle components.
●Avoid overfilling, or the engine
could be damaged.
●Check the oil level on the dip-
stick every time you refill the
vehicle.
●Be sure the engine oil filler cap
is properly tightened.
■If oil is spilled on the engine
cover
To prevent the engine cover from
being damaged, remove any
engine oil from the engine cover
as soon as possible using a neu-
tral detergent. Do not use an
organic solvent such as brake
cleaner.
Checking the coolant
A
B
C
A
B
C

5307-3. Do-it-yourself maintenance
1Remove any dirt or foreign
matter from the wheel con-
tact surface.
If foreign matter is on the wheel
contact surface, the wheel nuts
may loosen while th e vehicle is in
motion, causing the tire to come off.
2 Install the tire and loosely
tighten each wheel nut by
hand by approximately the
same amount.
Turn the wheel nuts until the wash-
ers ( ) come into contact with the
disc wheel ( ).
WARNING
●Failure to follow these precau-
tions could cause the wheel
nuts to loosen and the tire to fall
off, resulting in death or serious
injury.
• Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the
wheel nuts to be excessively
tightened, leading to bolt or disc
wheel damage. Remove any oil
or grease that has adhered
when installing the wheel nuts.
• Have the wheel nuts tightened with a torque wrench to 76 ft•lbf
(103 N•m, 10.5 kgf•m) as soon
as possible after changing
wheels.
• After replacing a tire, check the tightening torque as soon as
possible. If you cannot confirm
the tightening torque yourself,
have the vehicle inspected at
your Toyota dealer.
• When installing a tire, only use wheel nuts that have been spe-
cifically designed for that wheel.
• If there are any cracks or defor- mations in the bolt screws, nut
threads or bolt holes of the
wheel, have the vehicle
inspected by your Toyota
dealer.
• Do not attach a heavily dam- aged wheel ornament, as it may
fly off the wheel while the vehi-
cle is moving.
■Replacing a flat tire for vehi-
cles with power back door
In cases such as when replacing
tires, make sure to cancel the
power back door system
(  P.202). Failure to do so may
cause the back door to operate
unintentionally if the power back
door switch is accidentally
touched, resulting in hands and
fingers being caught and injured.
NOTICE
■Repairing or replacing tires,
wheels, tire pressure warn-
ing valves, transmitters and
tire valve caps
 P.518
Installing the tire
A
B

5347-3. Do-it-yourself maintenance
When replacing wheels, care
should be taken to ensure that
they are equivalent to those
removed in load capacity, diam-
eter, rim width and inset
*.
Replacement wheels are avail-
able at your Toyota dealer.
*: Conventionally referred to as off- set.
Toyota does not recommend
using the following:
 Wheels of different sizes or
types
 Used wheels
 Bent wheels that have been
straightened
■When replacing wheels
The wheels of your vehicle are
equipped with tire pressure warning
valves and transmitters that allow
the tire pressure warning system to
provide advance warning in the
event of a loss in tire inflation pres-
sure. Whenever wheels are
replaced, tire pressure warning
valves and transmitters must be
installed. ( P.532, 535)
Wheels
If a wheel is bent, cracked or
heavily corroded, it should
be replaced. Otherwise, the
tire may separate from the
wheel or cause a loss of
handling control.
Wheel selection
WARNING
■When replacing wheels
●Do not use wheels that are a dif-
ferent size from those recom-
mended in the Owner’s Manual,
as this may result in a loss of
handling control.
●Never use an inner tube in a
leaking wheel which is designed
for a tubeless tire. Doing so may
result in an accident, causing
death or serious injury.
■When installing the wheel
nuts
●Be sure to install the wheel nuts
with the tapered ends facing
inward. ( P.530)
Installing the nuts with the
tapered ends facing outward
can cause the wheel to break
and eventually cause the wheel
to come off while driving, which
could lead to an accident result-
ing in death or serious injury.
●Never use oil or grease on the
wheel bolts or wheel nuts. Oil
and grease may cause the
wheel nuts to be excessively
tightened, leading to bolt or disc
wheel damage. In addition, the
oil or grease can cause the
wheel nuts to loosen and the
wheel may fall off, causing an
accident and resulting in death
or serious injury. Remove any
oil or grease from the wheel
bolts or wheel nuts.
■Use of defective wheels pro-
hibited
Do not use cracked or deformed
wheels.
Doing so could cause the tire to
leak air during driving, possibly
causing an accident.

5568-2. Steps to take in an emergency
■High coolant temperature warning light (warning buzzer)
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
■Hybrid system overheat warning light* (warning buzzer)
*: This light illuminates on the multi- information display with a message.
■Malfunction indicator lamp
Warning lightDetails/Actions
Indicates that the engine is overheating
Immediately stop the vehicle in a safe
place.
Handling method ( P.594)
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe
place and contact your Toyota dealer.
( P.506)
Warning lightDetails/Actions
Indicates that the hybrid system has overheated
 Stop the vehicle in a safe place. Handling
method ( P.595)
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
 The hybrid system;
 The electronic engine control system;
 The electronic throttle control system; or
 The emission control system (if equipped)
 Have the vehicle inspected by your Toyota
dealer immediately.