2023 TOYOTA SIENNA HYBRID Owners Manual

4396-3. Do-it-yourself maintenance
6
Maintenance and care
4With the glove box fully open,
slightly lift up the glove box
and pull toward the seat to
detach the bottom of the
glove box.
Do not use excessive force if the
glove box does not detach when
lightly pulled. Ins tead, pull toward
the seat while slightly adjusting the
height of the glove box.
5 Unlock the filter cover ( ),
pull the filter cover out of the
claws ( ), and remove the
filter cover. 6
Remove the filter case.
7 Remove the air conditioning
filter from the filter case and
replace it with a new one.
The “ UP” marks shown on the
filter should be pointing up.
8When installing, reverse the
steps listed.
■Checking interval
Inspect and replace the air condi-
tioning filter according to the mainte-
nance schedule. In dusty areas or
areas with heavy traffic flow, early
replacement may be required. (For
scheduled maintenance information,
please refer to the “Owner’s Manual
Supplement” or “Scheduled Mainte-
nance Guide”.)
■If air flow from the vents
decreases dramatically
The filter may be clogged. Check
the filter and rep lace if necessary.
A
B

4406-3. Do-it-yourself maintenance
■Scheduled maintenance of the
air intake vents is necessary
when
In some situations such as when the
vehicle is used frequently or in
heavy traffic or dusty areas, the air
intake vents may need to be
cleaned more regularly.
For details, refer to “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement”.
■Cleaning the air intake vents
Improper handling of the air intake
vent covers and filt ers may result in
damage to them. If you have any
concerns about cleaning the filters,
contact your Toyota dealer.
NOTICE
■When using the air condition-
ing system
Make sure that a filter is always
installed. Using the air condition-
ing system without a filter may
cause damage to the system.
■When removing the glove box
Always follow the specified proce-
dure to remove the glove box
(  P.438). If the glove box is
removed without following the
specified procedure, the hinge of
the glove box may become dam-
aged.
■To prevent damage to the fil-
ter cover
When moving the filter cover in
the direction of arrow to release
the fitting, pay attention not to
apply excessive force to the
claws. Otherwise, the claws may
be damaged.
Cleaning the hybrid
battery (traction bat-
tery) air intake vents
To prevent the fuel econ-
omy from being affected,
visually inspect the hybrid
battery (traction battery) air
intake vents periodically for
clogs.
If they are dusty or clogged
or if “Maintenance Required
for Traction Battery Cooling
Parts See Owner’s Manual”
is displayed on the multi-
information display, clean
the air intake vents using
the following procedures:

4416-3. Do-it-yourself maintenance
6
Maintenance and care
1Turn the power switch off.
2 Using a Phillips screwdriver,
remove the clip.
3 Remove the air intake vent
cover.
Pull the cover as shown in the illus-
tration to disengage the claws,
starting from the claw in the upper
right corner and pull the cover
toward the front of the vehicle to remove it.
4
Remove the filter from the air
intake vent cover.
Disengage the 3 center claws from
the filter.
If dust has accumula ted on the air
intake vent cover, remove the dust
with a vacuum cleaner, etc.
5 Remove the dust and sand
from the filter.
Using a vacuum cleaner, etc.,
absorb dust and sand from the filter
by profiling the nozzle lightly along
the fold.
NOTICE
■If “Maintenance Required for
Traction Battery Cooling
Parts See Owner’s Manual” is
displayed on the multi-infor-
mation display
Clean the air intake vents immedi-
ately.
If the vehicle is continuously
driven with the warning message
displayed, it may cause a mal-
function or output restriction of the
hybrid battery (tr action battery).
Cleaning procedure

4426-3. Do-it-yourself maintenance
6Hold the filter to the light and
check if it is not clogged.
If the dust or sa nd cannot be
removed complete ly, contact your
Toyota dealer.
7 Reinstall the filter to the
cover.
Engage the 3 center claws to install
the filter.
Make sure that t he filter is not
crooked or deformed when install-
ing it.
8 Install the air intake vent
cover.
I ns er t t he t ab o f th e co ve r a s sh ow n
in the illustrati on and push the cover to enga
ge the claws.
9Using a Phillips screwdriver,
install the clip.
If “Maintenance Required for
Traction Battery Cooling Parts
See Owner’s Manual” was
displayed on the multi-infor-
mation display
10Start the hybrid system and check that the warning mes-
sage is no longer displayed.
It may take appro ximately 20 min-
utes after the hybrid system is
started until the warning message
disappears.
If the warning message does not
disappear after some time, have
the vehicle inspected by your
Toyota dealer.
■If the dust or sand on the filter
cannot be removed
It is recommended to use a vacuum
cleaner with plastic brushes.

4436-3. Do-it-yourself maintenance
6
Maintenance and care
WARNING
■When cleaning the air intake
vents
●Do not use water or other liq-
uids to clean the air intake
vents. If water is applied to the
hybrid battery (traction battery)
or other components, a mal-
function or fire may occur.
●Before cleaning the air intake
vents, make sure to turn the
power switch off to stop the
hybrid system.
●Do not put a hand or leg in the
air intake vents. If it is caught in
a cooling fan, o r if it touches a
high voltage part that results in
an electric shock, death or seri-
ous injuries may result.
NOTICE
■When cleaning the air intake
vents
Do not use an air blow gun, etc.
Dust may be blown out, possibly
causing a malfunction or output
restriction of the hybrid battery
(traction battery).
■To prevent damage to the
vehicle
Observe the following precau-
tions:
●Do not allow liquid or foreign
matter to enter t he air intake
vents.
●Make sure to reinstall the filters
and covers to their original posi-
tions after cleaning.
●Do not install anything to the air
intake vents o ther than the
exclusive filters for this vehicle
or use the vehicle without the fil-
ters installed.
■To prevent damage to the fil-
ters
Observe the following precau-
tions.
If the filter is damaged, have it
replaced with a ne w filter by your
Toyota dealer.
●Do not use an ai r blow gun, etc.
●Do not press hard a vacuum
cleaner, etc. against the filter.
●Do not use a hard brush, such
as a metal brush.
●Do not break the fold of the fil-
ter.

4446-3. Do-it-yourself maintenance
■If the electronic key battery is
depleted
The following symptoms may occur:
●The smart key system and wire-
less remote contr ol will not func-
tion properly.
●The operational range will be
reduced.
Prepare the following before
replacing the battery:
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2450
■Use a CR2450 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 manufacturer.
●Dispose of used ba tteries accord-
ing to the local laws.
1 Release the lock and remove
the mechanical key.
2 Remove the key cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a rag.
3Remove the depleted battery
using a small flathead screw-
driver.
When removing the cover, the elec-
tronic key module may stick to the
cover and the batt ery may not be
visible. In this case, remove the
electronic key module in order to
remove the battery.
Insert a new battery with the “+” ter-
Electronic key battery
Replace the battery with a
new one if it is depleted.
Items to prepare
Replacing the battery

4456-3. Do-it-yourself maintenance
6
Maintenance and care
minal facing up.
4When installing, reverse the
steps listed.
WARNING
■Battery precautions
Observe the following precau-
tions.
Failure to do so m ay result in
death or serious injury.
●Do not swallow the battery.
Doing so may cause chemical
burns.
●A coin battery or button battery
is used in the electronic key. If a
battery is swallowed, it may
cause severe chemical burns in
as little as 2 hours and may
result in death or serious injury.
●Keep away new and removed
batteries from children.
●If the cover cannot be firmly
closed, stop using the electronic
key and stow the key in the
place where children cannot
reach, and then contact your
Toyota dealer.
●If you accidentally swallow a
battery or put a b attery into a
part of your body, get emer-
gency medical attention imme-
diately.
■To prevent battery explosion
or leakage of flammable liq-
uid or gas
●Replace the battery with a new
battery of the same type. If a
wrong type of battery is used, it
may explode.
●Do not expose batteries to
extremely low pr essure due to
high altitude or extremely high
temperatures.
●Do not burn, bre ak or cut a bat-
tery.
NOTICE
■When replacing the battery
Use a flathead screwdriver of
appropriate size. Applying exces-
sive force may deform or damage
the cover.
■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.

4466-3. Do-it-yourself maintenance
1Turn the power switch off.
2 Open the fuse box cover.
Engine compartment
Push claw , and to com-
pletely release the lock, and then lift
up the cover.
Left side instrument panel
Remove the lid.
Right side luggage compart-
ment
Remove the cover
3Remove the fuse.
Only type A fuse c an be removed
using the pullout tool.
4 Check if the fuse is blown.
Replace the blown fuse with a new
fuse of an appropriate amperage
rating. The amperage rating can be
found on the fuse box lid.
Type A
Normal fuse
Checking and replac-
ing fuses
If any of the electrical com-
ponents do not operate, a
fuse may have blown. If this
happens, check and replace
the fuses as necessary.
Checking and replacing
fuses
ABC
A