Toyota 4Runner (2020 year). Instruction - part 28

440

6-3. Do-it-yourself maintenance

4RUNNER (U)

Turn the engine switch off.
Open  the  glove  box  and
remove the cover.

Remove the filter cover.

Remove the air conditioning fil-
ter  and  replace  it  with  a  new
one.

The “



UP” marks shown on the fil-

ter should be pointing up.

Air conditioning filter

The air conditioning filter must be changed regularly to maintain
air conditioning efficiency.

Removal method

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Checking interval

Inspect and replace the air conditioning  filter  according to  the  maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement
may be required. (For scheduled maintenance information, please refer to the
“Schedule maintenance guide” or “Owner’s Instruction Supplement”.)

■

If air flow from the vents decreases dramatically

The filter may be clogged. Check the filter and replace if necessary.

NOTICE

■

When using the air conditioning system

Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the
system.

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4RUNNER (U)

●

Flathead screwdriver

●

Small flathead screwdriver

●

Lithium battery CR2016 (vehicles without a smart key system), or
CR1632 (vehicles with a smart key system)

Remove the cover.

To  prevent  damage  to  the  key,
cover the tip of the screwdriver with
a rag.

Remove the module.

Open  the  case  cover  using  a
coin  protected  with  tape  etc.
and  remove  the  depleted  bat-
tery.

Insert  a  new  battery  with  the  “+”
terminal facing up.

Wireless remote control/electronic key 

battery

Replace the battery with a new one if it is depleted.

You will need the following items:

Replacing the battery (vehicles without a smart key system)

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Take out the mechanical key.

Remove the cover.

To  prevent  damage  to  the  key,
cover the tip of the screwdriver with
a rag.

Remove the depleted battery.

Insert  a  new  battery  with  the  “+”
terminal facing up.

Replacing the battery (vehicles with a smart key system)

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2

3

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6-3. Do-it-yourself maintenance

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Use a CR2016 (vehicles without a smart key system) or CR1632 (vehicles
with a smart key system) lithium battery

●

Batteries can be purchased at your Toyota dealer, local electrical appliance
shops or camera stores.

●

Replace only with the same or equivalent type recommended by the manu-
facturer.

●

Dispose of used batteries according to local laws.

■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart key system and wireless remote control will not function properly.

●

The operational range will be reduced.

WARNING

■

Removed battery and other parts

These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.

NOTICE

■

For normal operation after replacing the battery

Observe the following precautions to prevent accidents:

●

Always work with dry hands.
Moisture may cause the battery to rust.

●

Do not touch or move any other component inside the remote control.

●

Do not bend either of the battery terminals.

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4RUNNER (U)

Turn the engine switch off.
Open the Fuse box cover. 



Engine compartment

Push the tab in and lift the lid off.



Driver’s side instrument panel

Remove the lid.

Remove  the  fuse  with  the  pull-
out tool.

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

Checking and replacing fuses

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.

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6-3. Do-it-yourself maintenance

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Check if the fuse is blown.

Normal fuse
Blown fuse

Type A, B, C, D, E:
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.
Type F:
Contact your Toyota dealer.

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2



Type A



Type B



Type C



Type D



Type E



Type F

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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. 448)

●

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.

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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6-3. Do-it-yourself maintenance

4RUNNER (U)

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



P. 531)

Light bulbs

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

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Front

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Rear

Bulb locations

Headlight low beam
Headlight  high  beam/day-
time running light 
Fog light

Front  turn  signal/parking
light
Front side marker light

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Rear turn signal light
Back-up light
License plate light

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6-3. Do-it-yourself maintenance

4RUNNER (U)

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Headlight low beams

Turn the cover counterclock-
wise and remove it.

Turn  the  bulb  base  counter-
clockwise.

Unplug  the  connector  while
pulling the lock release.

Replacing light bulbs

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Replace  the  light  bulb,  and
install the bulb base.

Align the 3 tabs on the light bulb
with the mounting and insert.

Turn  and  secure  the  bulb
base.

Shake  the  bulb  base  gently  to
check  that  it  is  not  loose,  turn
the headlights on once and visu-
ally confirm that no light is leak-
ing through the mounting.

Install the cover.

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5

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6-3. Do-it-yourself maintenance

4RUNNER (U)

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Headlight high beam/daytime running lights

Turn  the  bulb  base  counter-
clockwise.

Pull the bulb out while press-
ing  the  lock  release  of  the
connector.

Replace  the  light  bulb,  and
install the bulb base.

Align the 3 tabs on the light bulb
with the mounting and insert.

Turn  and  secure  the  bulb
base.

Shake  the  bulb  base  gently  to
check  that  it  is  not  loose,  turn
the headlights on once and visu-
ally confirm that no light is leak-
ing through the mounting.

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Front turn signal/parking light

Turn  the  steering  wheel  in
the  opposite  direction  of  the
front  turn  signal  light  and
parking light that you wish to
replace.

For  example,  if  you  wish  to
replace the front turn signal light
and  parking  light  on  the  right
side,  turn  the  steering  wheel  to
the left.

Remove  the  fender  liner
screws.

Partly  remove  the  fender
liner.

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6-3. Do-it-yourself maintenance

4RUNNER (U)

Turn  the  bulb  base  counter-
clockwise.

Remove the light bulb.

When installing, reverse the steps listed.

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Front side marker lights

Turn  the  steering  wheel  in
the  opposite  direction  of  the
front  side  marker  light  that
you wish to replace.

For  example,  if  you  wish  to
replace  the  front  side  marker
light  on  the  right  side,  turn  the
steering wheel to the left.

Remove  the  fender  liner
screws.

Partly  remove  the  fender
liner.

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