Toyota Prius Prime (2022 year). Manual in english - page 40

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Checking and replacing fuses

Turn the power switch off.

Confirm that the charging connector is not connected. Also, do not use the
Remote Air Conditioning System during the procedure.

Open the fuse box cover.



Engine compartment type A fuse box

While  pushing  the  2  claws,  lift
up the cover.

When  closing  the  cover,  make
sure to attach the 2 claws.



Engine compartment type B fuse box

While  pushing  the  3  claws,  lift
up the cover.

When  closing  the  cover,  make
sure to attach the 3 claws.



Left side instrument panel

Remove the lid.

Make  sure  to  press  the  claw
during removal or installation.

If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as nec-
essary.

1

2

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7-3. Do-it-yourself maintenance

Remove the fuse.
Only  type  A  fuse  can  be
removed using the pullout tool.

Check if the fuse is blown.

Normal fuse
Blown fuse

Replace the blown fuse with a new fuse of an appropriate amperage rat-
ing. The amperage rating can be found on the fuse box lid.

3

4

1
2



Type A



Type B



Type C

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■

After a fuse is replaced

●

If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. (



P. 652)

●

If the replaced fuse blows again, have the vehicle inspected by your Toyota
dealer.

■

If there is an overload in a circuit

The fuses are designed to blow, protecting the wiring harness from damage.

■

When replacing light bulbs

Toyota recommends that you use genuine Toyota products designed for this
vehicle. Because certain bulbs are connected to circuits designed to prevent
overload,  non-genuine  parts  or  parts  not  designed  for  this  vehicle  may  be
unusable.

WARNING

■

To prevent system breakdowns and vehicle fire

Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or
injury.

●

Never use a fuse of a higher amperage rating than that indicated, or use
any other object in place of a fuse.

●

Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.

●

Do not modify the fuses or fuse boxes.

NOTICE

■

Before replacing fuses

Have  the  cause  of  electrical  overload  determined  and  repaired  by  your
Toyota dealer as soon as possible.

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7-3. Do-it-yourself maintenance

Headlight aim

Adjustment bolt A
Adjustment bolt B

Make  sure  the  vehicle  has  a  full  tank  of  gasoline  and  the  area
around the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.

Vertical movement adjusting bolts

1
2

Before checking the headlight aim

1

2

3

4

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Using  a  Phillips-head  screw-
driver, turn bolt A in either direc-
tion.

Remember  the  turning  direction
and the number of turns.

Turn bolt B the same number of
turns and in the same direction
as step 

.

If the headlight cannot be adjusted
using this procedure, take the vehi-
cle to your Toyota dealer to adjust
the headlight aim.

Adjusting the headlight aim

1

2

1

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7-3. Do-it-yourself maintenance

Light bulbs

Check the wattage of the light bulb to be replaced. (



P. 734)

Back-up light

You may replace the following bulbs by yourself. The difficulty
level of replacement varies depending on the bulb. If necessary
bulb  replacement  seems  difficult  to  perform,  contact  your
Toyota dealer.
For more information about replacing other light bulbs, contact
your Toyota dealer.

Preparing for light bulb replacement

Bulb locations

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■

Back-up lights

Remove the 2 clips that secure the lower portion of the cover at
the back of the rear tire.
Pull out the center portion of
the clip to unlock using a flat-
head  screwdriver,  and  then
pull it to remove.

Remove the 3 clips that secure the upper portion of the cover.

Turn the clip counterclockwise to remove.
Pull out the center portion of the clip to unlock using a flathead
screwdriver, and then pull it to remove.
Pull out the center portion of the clip to unlock using a flathead
screwdriver, and then pull it to remove.

Replacing light bulbs

1

2

1
2

3

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7-3. Do-it-yourself maintenance

Remove  the  cover  end  and
pull  the  cover  toward  the
front of the vehicle to make a
gap  between  the  cover  and
rear bumper.

Remove the clip inside of the cover, and remove the cover.
Pull out the center portion of
the clip to unlock using a flat-
head  screwdriver,  and  then
pull it to remove.

Turn  the  bulb  base  counter-
clockwise,  and  then  remove
the light bulb.

To remove the light bulb, insert a
hand from the gap between the
rear tire and rear bumper.

3

4

5

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Install  a  new  light  bulb  then
install  the  bulb  base  to  the
light  unit  by  inserting  it  and
turning  the  bulb  base  clock-
wise.

Reinstall the cover to the its original position, and attach the clip
inside of the cover.
Attach  the  clip  on  the  cover,
then press the center portion
of the clip to lock.

Reinsert the cover end to the
rear bumper.

Make sure to secure the 2 tabs
on the cover end.

6

7

8

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7-3. Do-it-yourself maintenance

Reinsert the 3 clips to the upper portion of the cover.

Turn the clip clockwise to lock.
Attach the clip on the cover, and then press the center portion
of the clip to lock.
Attach the clip on the cover, and then press the center portion
of the clip to lock.

Reinsert the 2 clips to the lower portion of the cover.
Attach  the  clip  on  the  cover,
and  then  press  the  center
portion of the clip to lock.

9

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2

3

10

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■

Replacing the following bulbs

If any of the lights listed below has burnt out, have it replaced by
your Toyota dealer.

●

Headlights and daytime running lights

●

Front side marker lights

●

Parking lights

●

Fog lights (if equipped)

●

LED accent lights (if equipped)

●

Front turn signal lights

●

Rear turn signal lights

●

Rear side marker lights

●

Tail lights

●

Stop lights

●

High mounted stoplight

●

License plate lights

■

LED lights

The lights other than the back-up lights each consist of a number of LEDs. If
any of the LEDs burn out, take your vehicle to your Toyota dealer to have the
light replaced.

■

Condensation build-up on the inside of the lens

Temporary condensation build-up on the inside of the lens does not indicate a
malfunction. Contact your Toyota dealer for more information in the following
situations:

●

Large drops of water have built up on the inside of the lens.

●

Water has built up inside the light.

■

When replacing light bulbs



P. 649

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7-3. Do-it-yourself maintenance

WARNING

■

Replacing light bulbs

●

Be sure to stop the hybrid system and turn off the lights. Do not attempt to
replace the bulb immediately after turning off the lights. 
The bulbs become very hot and may cause burns.

●

Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.

●

Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the light unit. This may
damage the back-up lights or cause condensation to build up on the lens.

●

Do  not  attempt  to  repair  or  disassemble  light  bulbs,  connectors,  electric
circuits or component parts.
Doing so may result in death or serious injury due to electric shock.

●

Do not replace the right-hand back-up light immediately after the vehicle
has been driven.
After the vehicle has been driven the exhaust pipe will be extremely hot,
and touching the exhaust pipe may result in burns.

●

Use gloves and other protection to prevent injuries on vehicle parts.
There is the danger of being injured on the edges of parts.

■

To prevent damage or fire 

●

Make sure bulbs are fully seated and locked. 

●

Check the wattage of the bulb before installing to prevent heat damage.

659

8

When trouble arises

8-1. Essential information

Emergency flashers .......... 660
If your vehicle has to 

be stopped in an 
emergency ...................... 661

If the vehicle is submerged 

or water on the road 
is rising............................ 662

8-2. Steps to take in an 

emergency

If your vehicle needs to 

be towed ......................... 664

If you think something is 

wrong .............................. 670

If a warning light turns on 

or a warning buzzer 
sounds ............................ 671

If a warning message is 

displayed......................... 681

If you have a flat tire.......... 689
If the hybrid system will 

not start........................... 706

If the electronic key does 

not operate properly........ 708

If the 12-volt battery is 

discharged ...................... 712

If your vehicle overheats ... 718
If the vehicle becomes 

stuck ............................... 723

660

8-1. Essential information

Emergency flashers

Press the switch.

All the turn signal lights will flash. To turn them off, press the switch once
again.

■

Emergency flashers

●

If the emergency flashers are used for a long time while the hybrid system is
not  operating  (while  the  “READY”  indicator  is  not  illuminated),  the  12-volt
battery may discharge.

●

If  any  of  the  SRS  airbags  deploy  (inflate)  or  in  the  event  of  a  strong  rear
impact, the emergency flashers will turn on automatically.
The  emergency  flashers  will  turn  off  automatically  after  operating  for
approximately  20  minutes.  To  manually  turn  the  emergency  flashers  off,
press the switch twice.
(The emergency flashers may not turn on automatically depending on the
force of the impact and conditions of the collision.)

The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.



Vehicles with 7-inch display



Vehicles with 11.6-inch display

661

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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:

1

2

3

4

3

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

4

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.

5

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8-1. Essential information

If the vehicle is submerged or water on the 

road is rising

●

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 ensure an escape route.

●

If the window can be opened, exit the vehicle through the window.

●

If the door and window cannot be opened due to the rising water,
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 after waiting
for the rising water to enter the vehicle, and exit the vehicle. When
the outside water level exceeds half the height of the door, the door
cannot be opened from the inside due to water pressure.

■

Water level exceeds the floor

When the water level exceeds the floor and time has passed, the electrical
equipment will get damaged, the power windows will not operate, the engine
and motor stop, and the vehicle may not be able to get moving.

■

Using an emergency escape hammer

*

1

Laminated glass

*

2

 is used in the windshield and the windows on this vehicle.

Laminated glass cannot be shattered with an emergency hammer

*

1

.

*

1

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

ther information about an emergency hammer.

*

2

: If equipped

This vehicle is not designed to be able to drive on roads that are
deeply  flooded  with  water.  Do  not  drive  on  roads  where  the
roads may be submerged or the water may be rising. It is dan-
gerous to remain in the vehicle, if it anticipated that the vehicle
will be flooded or set a drift. Remain calm and follow the follow-
ing.