Toyota Prius Prime (2020 year). Owner's manual - part 36

Mainten

Cleaning and protecting the vehicle interior

● Remove dirt and dust using a vacuum cleaner. Wipe dirty surfaces

with a cloth dampened with lukewarm water.

● If dirt cannot be removed, wipe it off with a soft cloth dampened with

neutral detergent diluted to approximately 1%.
Wring out any excess water from the cloth and thoroughly wipe off
remaining traces of detergent and water.

● Remove dirt and dust using a vacuum cleaner.
● Wipe off any excess dirt and dust with a soft cloth dampened with

diluted detergent.

Use a diluted water solution of approximately 5% neutral wool detergent.

● Wring out any excess water from the cloth and thoroughly wipe off

all remaining traces of detergent.

● Wipe the surface with a dry, soft cloth to remove any remaining

moisture. Allow the leather to dry in a shaded and ventilated area.

● Remove dirt and dust using a vacuum cleaner.
● Wipe it off with a soft cloth dampened with neutral detergent diluted

to approximately 1%.

● Wring out any excess water from the cloth and thoroughly wipe off

remaining traces of detergent and water.

The following procedures will help protect your vehicle’s interior
and keep it in top condition:

Protecting the vehicle interior

Cleaning the leather areas

Cleaning the synthetic leather areas

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570

Clean the air intake vents and fil-
ters by the following procedures to
prevent dust from accumulating in
them, or to prevent them from
clogging.

The filters are attached to the back
side of the air intake vent grilles.

■

Cleaning the air intake vents and filters
Remove the dust from the vents
and filters with a vacuum
cleaner etc.

Clean the vents of the both
sides.

■

Cleaning the filters
If “Maintenance required for Traction battery cooling parts See
owner’s manual” is shown on the multi-information display, remove
the air intake vent grilles on the both sides of the rear seat and
clean the filters.

Insert a flathead screwdriver
etc. to the notch at the edge
of the grille to disconnect the
3 tabs, and remove the grille.

Turn  over  the  rubber  portion
beside the grille to insert the flat-
head screwdriver.
To  prevent  damage,  cover  the
tip  of  the  flathead  screwdriver
with a rag.

Cleaning the air intake vents and filters

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571

Mainten

Remove the filter.

Remove dust using a vac-
uum cleaner etc. to clean the
filter.

Also, remove dust on the grille
as well as on the filter using a
vacuum cleaner.

Reinstall the filter to the origi-
nal position.

Be careful not  to deform  the fil-
ter  or  allow  a  gap  between  the
filter  and  the  installation  posi-
tion when installing the filter.

Insert the tabs at the edge of
the grille to the positions, and
push the opposite side edge
in to secure the grille.

Reinstall the grille to the original
position while turning over the
rubber portion.

Start the hybrid system and check that the warning message on
the multi-information display disappears.

It may take several minutes before the warning message disappears.

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572

■

Caring for leather areas
Toyota recommends cleaning the interior of the vehicle at least twice a year to
maintain the quality of the vehicle’s interior.

■

Shampooing the carpets
There are several commercial foaming-type cleaners available. Use a sponge
or brush to apply the foam. Rub in overlapping circles. Do not use water.
Wipe dirty surfaces and let them dry. Excellent results are obtained by keep-
ing the carpet as dry as possible.

■

Seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also
check the belts periodically for excessive wear, fraying or cuts.

■

Cleaning the air intake vents and filters

●

Dust on the air intake vents or filters may interferes cooling of the hybrid bat-
tery (traction battery) and results in poor electricity and fuel consumption.
Clean the air intake vents and filters periodically.

●

If continuing to drive the vehicle with “Maintenance required for Traction bat-
tery cooling parts See owner’s manual” shown on the multi-information dis-
play, the hybrid battery (traction battery) may overheat, leading to
decreasing in distance that can be driven using the electric motor. It may
cause poor electricity and fuel consumption or a malfunction. If the warning
message is shown, clean the air intake vents and filters immediately.

●

Improper handling may result in damage to the grille or filters. If you have
any concerns about cleaning the filters, contact your Toyota dealer.

●

If the warning message on the multi-information display does not disappear
after cleaning the filters, have the vehicle inspected by your Toyota dealer.

●

Timing of cleaning filters differs depending on the use environment of the
vehicle.

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573

Mainten

WARNING

■

Water in the vehicle

●

Do not splash or spill liquid in the vehicle, such as on the floor, in the
hybrid battery (traction battery) air intake vent, and in the luggage com-
partment.
Doing so may cause the hybrid battery (traction battery), electrical compo-
nents, etc. to malfunction or catch fire.

●

Do not get any of the SRS components or wiring in the vehicle interior wet.
(

P. 38)

An electrical malfunction may cause the airbags to deploy or not function
properly, resulting in death or serious injury.

●

Vehicles with wireless charger:
Do not let the wireless charger (

P. 544) get wet. Failure to do so may

cause the charger to become hot and cause burns or could cause electric
shock resulting in death or serious injury.

■

Cleaning the interior (especially instrument panel)
Do not use polish wax or polish cleaner. The instrument panel may reflect
off the windshield, obstructing the driver’s view and leading to an accident,
resulting in death or serious injury.

NOTICE

■

Cleaning detergents

●

Do not use the following types of detergent, as they may discolor the vehi-
cle interior or cause streaks or damage to painted surfaces:
• Non-seat portions: Organic substances such as benzene or gasoline,

alkaline or acidic solutions, dye, and bleach

• Seats: Alkaline or acidic solutions, such as thinner, benzene, and alco-

hol

●

Do not use polish wax or polish cleaner. The instrument panel’s or other
interior part’s painted surface may be damaged.

■

Preventing damage to leather surfaces
Observe the following precautions to avoid damage to and deterioration of
leather surfaces:

●

Remove any dust or dirt from leather surfaces immediately.

●

Do not expose the vehicle to direct sunlight for extended periods of time.
Park the vehicle in the shade, especially during summer.

●

Do not place items made of vinyl, plastic, or containing wax on the uphol-
stery, as they may stick to the leather surface if the vehicle interior heats
up significantly.

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574

NOTICE

■

Water on the floor
Do not wash the vehicle floor with water.
Vehicle systems such as the audio system may be damaged if water comes
into contact with electrical components such as the audio system above or
under the floor of the vehicle. Water may also cause the body to rust.

■

When cleaning the inside of the windshield
Do not allow glass cleaner to contact the lens. Also, do not touch the lens.
(

P. 375).

■

Cleaning the inside of the rear window

●

Do not use glass cleaner to clean the rear window, as this may cause
damage to the rear window defogger heater wires or antenna. Use a cloth
dampened with lukewarm water to gently wipe the window clean. Wipe the
window in strokes running parallel to the heater wires or antenna.

●

Be careful not to scratch or damage the heater wires or antenna.

■

When cleaning the air intake vents and filters
Observe the following precautions. Failure to do so may cause damage to
the vehicle.

●

When removing the air intake vent grille, make sure to turn the power
switch off to stop the hybrid system.

●

Do not use water or other liquid to clean the air intake vents or filters.

●

Do not allow water or foreign matter to enter the air intake vent when the
grille is removed.

●

Carefully handle the removed filters not to damage.
If the filter is damaged, have it replaced with a new filter by your Toyota
dealer.

●

Make sure to reinstall the filters and vents to its original positions after
cleaning.
The shape of the left side and right side filters are different. When remov-
ing both filters, be careful not to mistake the left-right installation direction.

●

Do not install anything but the filters exclusive for this vehicle to the air
intake vents or use the vehicle without installing the filters.

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575

Mainten

Maintenance requirements

General maintenance should be performed on a daily basis. This can
be done by yourself or by a Toyota dealer.

Scheduled maintenance should be performed at specified intervals
according to the maintenance schedule.

For details about maintenance items and schedules, refer to the “Sched-
uled Maintenance Guide” or “Owner’s Manual Supplement”.

You can perform some maintenance procedures by yourself.
Please be aware that do-it-yourself maintenance may affect warranty
coverage.

The use of Toyota repair manuals is recommended.
For details about warranty coverage, refer to the separate “Owner’s War-
ranty Information Booklet” or “Owner’s Manual Supplement”.

To ensure safe and economical driving, day-to-day care and reg-
ular maintenance are essential. It is the owner’s responsibility to
perform regular checks. Toyota recommends the following main-
tenance:

General maintenance

Scheduled maintenance

Do-it-yourself maintenance

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576

■

Repair and replacement
It is recommended that genuine Toyota parts be used for repairs to ensure
performance of each system. If non-Toyota parts are used in replacement or if
a repair shop other than a Toyota dealer performs repairs, confirm the war-
ranty coverage.

■

Resetting the message indicating maintenance is required (U.S.A. only)
After the required maintenance is preformed according to the maintenance
schedule, please reset the message.
To reset the message, follow the procedures described below:

While the hybrid system is operating, switch the multi-information display to

the

screen. (

P. 244)

Press

of the meter control switches, select

(“Vehicle

Settings”), and then press

Press

of the meter control switches, select “Maintenance Sys-

tem”, and then press

Press

of the meter control switches, select “Oil Maintenance”,

and then press

Press

of the meter control switches, select “Yes”, and then press

■

Allow inspection and repairs to be performed by a Toyota dealer

●

Toyota technicians are well-trained specialists and are kept up to date with
the latest service information. They are well informed about the operation of
all systems on your vehicle.

●

Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty coverage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will promptly take
care of it.

A message will be displayed when the
reset procedure has been completed.

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577

Mainten

WARNING

■

If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and
possible serious injury or death.

■

Handling of the 12-volt battery

●

Engine exhaust, some of its constituents, and a wide variety of automobile
components contain or emit chemicals known to the State of California to
cause cancer and birth defects and other reproductive harm. Work in a
well ventilated area.

●

Oils, fuels and fluids contained in vehicles as well as waste produced by
component wear contain or emit chemicals known to the State of Califor-
nia to cause cancer and birth defects or other reproductive harm. Avoid
exposure and wash any affected area immediately.

●

12-volt battery posts, terminals and related accessories contain lead and
lead compounds which are known to cause brain damage. Wash your
hands after handling. (

P. 595)

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578

General maintenance

Listed below are the general maintenance items that should be
performed  at  the  intervals  specified  in  the  “Owner’s  Warranty
Information  Booklet”  or  “Owner’s  Manual  Supplement/Sched-
uled Maintenance Guide”. It is recommended that any problem
you  notice  should  be  brought  to  the  attention  of  your  Toyota
dealer or qualified service shop for advice.

Engine compartment

Items

Check points

12-volt battery

Check the connections.

(

P. 595)

Brake fluid

Is the brake fluid at the correct level? (

P. 598)

Engine/power

control

unit coolant

Is the engine/power control unit coolant at the
correct level?

(

P. 592)

Engine oil

Is the engine oil at the correct level? (

P. 589)

Exhaust system

There should not be any fumes or strange
sounds.

Radiator/condenser

The radiator and condenser should be free from
foreign objects.

(

P. 594)

Washer fluid

Is there sufficient washer fluid?

(

P. 600)

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Mainten

Vehicle interior

Items

Check points

Accelerator pedal

• The accelerator pedal should move smoothly

(without uneven pedal effort or catching).

Hybrid

transmission

“Park” mechanism

• When parked on a slope and the shift position

is in P, is the vehicle securely stopped?

Brake pedal

• Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clear-

ance from the floor?

(

P. 725)

• Does the brake pedal have the correct

amount of free play?

(

P. 725)

Brakes

• The vehicle should not pull to one side when

the brakes are applied.

• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to

the floor when the brakes are applied.

Head restraints

• Do the head restraints move smoothly and

lock securely?

Indicators/buzzers

• Do the indicators and buzzers function prop-

erly?

Lights

• Do all the lights come on?
• Are the headlights aimed correctly? (

P. 641)

Parking brake

• Does the parking brake pedal move

smoothly?

• When parked on a slope and the parking

brake is on, is the vehicle securely stopped?

Seat belts

• Do the seat belts operate smoothly?
• The seat belts should not be damaged.

Seats

• Do the seat controls operate properly?

Steering wheel

• Does the steering wheel rotate smoothly?
• Does the steering wheel have the correct

amount of free play?

• There should not be any strange sounds com-

ing from the steering wheel.

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580

Vehicle exterior

Items

Check points

Doors

• Do the doors operate smoothly?

Engine hood

• Does the engine hood lock system work prop-

erly?

Fluid leaks

• There should not be any signs of fluid leakage

after the vehicle has been parked.

Tires

• Is the tire inflation pressure correct?

• The tires should not be damaged or exces-

sively worn.

• Have the tires been rotated according to the

maintenance schedule?

• The wheel nuts should not be loose.

Windshield wipers

• The wiper blades should not show any signs

of cracking, splitting, wear, contamination or
deformation.

• The wiper blades should clear the windshield

without streaking or skipping.

Charging equipment

Items

Check points

Charging cable

• Check the conditions of the charging cable

and charging connector.

(

P. 120)

WARNING

■

If the hybrid system is operating
Turn the hybrid system off and ensure that there is adequate ventilation
before performing maintenance checks.

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581

Mainten

7-3. Do-it-yourself maintenance

Emission inspection and maintenance (I/M)

programs

The OBD system determines that a problem exists somewhere in the
emission control system. Your vehicle may not pass the I/M test and
may need to be repaired. Contact your Toyota dealer to service the
vehicle.

● When the 12-volt battery is disconnected or discharged

Readiness codes that are set during ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may
not be completely set.

● When the fuel tank cap is loose

The malfunction indicator lamp comes on indicating a temporary
malfunction and your vehicle may not pass the I/M test.

The error code in the OBD system will not be cleared unless the vehi-
cle is driven 40 or more times.

Contact your Toyota dealer to prepare the vehicle for re-testing.

Some states have vehicle emission inspection programs which
include OBD (On Board Diagnostics) checks. The OBD system
monitors the operation of the emission control system.

If the malfunction indicator lamp comes on

Your vehicle may not pass the I/M test in the following situations:

When the malfunction indicator lamp still remains on after sev-
eral driving trips

If your vehicle does not pass the I/M test

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582

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.

Items

Parts and tools

12-volt battery
condition
(

P. 595)

• Grease

• Conventional wrench (for terminal clamp bolts)

Brake fluid level
(

P. 598)

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

or FMVSS No.116 DOT 4 brake fluid

• Rag or paper towel
• Funnel (used only for adding brake fluid)

Engine/power
control unit cool-
ant level
(

P. 592)

• “Toyota Super Long Life Coolant” or a similar high

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

For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with
50% coolant and 50% deionized water.

For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with
55% coolant and 45% deionized water.

• Funnel (used only for adding coolant)

Engine oil level
(

P. 589)

• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)

Fuses (

P. 638)

• Fuse with same amperage rating as original

Hybrid battery
(traction battery)
air intake vent
(

P. 570)

• Vacuum cleaner, etc.

• Flathead screwdriver

Headlight aim
(

P. 641)

• Phillips-head screwdriver

Light bulbs
(

P. 643)

• Bulb with same number and wattage rating as origi-

nal

• Flathead screwdriver

• Wrench

Radiator and con-
denser (

P. 594)



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7-3. Do-it-yourself maintenance

Mainten