2023 TOYOTA SIENNA HYBRID battery

5087-2. Steps to take in an emergency
WARNING
●Do not smoke, use matches,
cigarette lighters or allow open
flame near the 12-volt battery.
■12-volt battery precautions
The 12-volt battery contains poi-
sonous and corrosi ve acidic elec-
trolyte, while related parts contain
lead and lead compounds.
Observe the following precautions
when handling the 12-volt battery:
●When working with the 12-volt
battery, always wear safety
glasses and take care not to
allow any battery fluids (acid) to
come into contact with skin,
clothing or the vehicle body.
●Do not lean over the 12-volt bat-
tery.
●In the event that battery fluid
comes into contact with the skin
or eyes, immediately wash the
affected area with water and
seek medical attention.
Place a wet sponge or cloth
over the affected area until
medical attention can be
received.
●Always wash your hands after
handling the 12-volt battery sup-
port, terminals, and other bat-
tery-related parts.
●Do not allow child ren near the
12-volt battery.
■After recharging the 12-volt
battery
Have the 12-volt battery
inspected at your Toyota dealer
as soon as possible.
If the 12-volt battery is deteriorat-
ing, continued use may cause the
12-volt battery to emit a malodor-
ous gas, which may be detrimen-
tal to the health of passengers.
■When replacing the 12-volt
battery
●For information regarding 12-
volt battery rep lacement, con-
tact your Toyota dealer.
●After exchanging, securely
attach the exhaust hose and
exhaust hole plug to the
exhaust hole of the exchanged
12-volt battery. If not properly
installed, gases (hydrogen) may
leak into the vehicle interior, and
there is the po ssible danger of
the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper
cables, ensure that they do not
become entangled in the cooling
fan, etc.
■To prevent damaging the
vehicle
The exclusive jump starting termi-
nal is to be used when charging
the 12-volt battery from another
vehicle in an emergency. It cannot
be used to jump start another
vehicle.

5198-1. Specifications
8
Vehicle specifications
Rear (AWD models)
■Oil capacity (Drain and refill
 reference
*)
*: The engine oil capacity is a refer-
ence quantity to be used when
changing the engine oil. Warm up
the engine and turn off the hybrid
system, wait more than 5 min-
utes, and check the oil level on
the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is
used in your Toyota vehicle.
Use Toyota approved “Toyota
Genuine Motor Oil” or equiva-
lent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-6B multigrade engine
oil
Recommended viscosity:
SAE 0W-16
SAE 0W-16 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-16 is not available,
SAE 0W-20 oil may be used.
However, it must be replaced
with SAE 0W-16 at the next oil
change.
TypePermanent magnet synchronous motor
Maximum output40 kW
Maximum torque89.2 ft•lbf (121 N•m, 12.3 kgf•m)
Hybrid battery (traction battery)
TypeNickel-Metal hy
dride battery
Voltage7.2 V/module
Capacity6.5 Ah (3HR)
Quantity40 modules
Nominal voltage288 V
Lubrication system
With filter4.8 qt. (4.5 L, 4.0 Imp.
qt.)
Without fil-
ter4.4 qt. (4.2 L, 3.7 Imp.
qt.)

5218-1. Specifications
8
Vehicle specifications
*: The fluid capacity is the quantity of reference.If replacement is necessary, contact y our Toyota dealer.
*: The fluid capacity is the quantity of reference.
If replacement is necessary, contact y our Toyota dealer.
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark pl ug gap.
Electrical system (12-volt Battery)
Open voltage at 68°F (20°C):
12.0 V or higher
(Turn the power switch to OFF and turn on
the high beam headlights for 30 seconds.)
If the voltage is lower than the standard
value, charge the battery.
Charging rates5 A max.
Hybrid transmission
Fluid capacity*4.6 qt. (4.4 L, 3.9 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Hybrid transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or ultimately damage the transmission of yo ur vehicle.
Rear differential (rear electric motor) (AWD models)
Fluid capacity*1.8 qt. (1.7 L, 1.5 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or ultimately damage the transmission of yo ur vehicle.

5338-1. Specifications
8
Vehicle specifications
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distributionDistribution of occupant s in a vehicle as speci-
fied in the third column of Table 1
* below
Production options weight
The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride leveler s, roof rack, heavy duty
battery, and special trim
RimA metal support for a ti re or a tire and tube
assembly upon which the tire beads are seated
Rim diameter
(Wheel diameter)Nominal diameter o f the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacture r’s designation for a
rim by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb.
(68 kg) times the vehicl e’s designated seating
capacity
Vehicle maximum load on
the tireThe load on an individual tire that is determined
by distributing to each ax le its share of the max-
imum loaded vehicle weight, and dividing by two
Vehicle normal load on
the tire
The load on an individual tire that is determined
by distributing to each axle its share of curb
weight, accessory weight, and normal occupant
weight (distributed in accordance with Table 1
*
below), and dividing by two
Tire related termMeaning

5388-2. Customization
8-2.Customization
■Changing using the
audio/visual system
1 Press the “MENU” button.
2 Select “Setup” on the menu
screen and select “Vehicle”.
3 Select “Vehicle Customiza-
tion”.
Various setting can be changed.
Refer to the list o f settings that can
be changed for details.
■Changing using the multi-
information display
4.2-inch display
1 Press or of the meter
control switches and select
.
2 Press or of the meter
control switches, select the
item.
7-inch display
1 Press or of the meter
control switches and select
.
2 Press or of the meter
control switches, select the
item.
3 To switch the function on and
off, press “OK” to switch to
the desired setting.
4 To perform detailed setting of
functions that support
detailed settings, press and
hold “OK” and display the
setting screen.
The method of pe rforming detailed
setting differs for each screen.
Please refer to the advice sentence
displayed on the screen.
To go back to the p revious screen
or exit the customize mode, press
.
■When customizing using the
audio/visual system or multi-
information display
Stop the vehicle in a safe place,
apply the parking brake, and shift
the shift lever to P . Also, to prevent
12-volt battery discharge, leave the
hybrid system operating while cus-
tomizing the features.
Customizable features
Your vehicle includes a vari-
ety of electronic features
that can be personalized to
suit your preferences. The
settings of these features
can be changed using the
multi-information display,
audio/visual system, or at
your Toyota dealer.
Customizing vehicle fea-
tures

5398-2. Customization
8
Vehicle specifications
Some function settings are changed simultaneously with other func-
tions being customized. Contact y our Toyota dealer for further
details.
Settings that can be changed using the audio/visual system
Settings that can be changed using the multi-information display
Settings that can be changed by your Toyota dealer
Definition of symbols: O = Available, – =Not available
■Predictive efficient drive* (  P.82)
*: If equipped
■Gauges, meters and multi-information display ( P.97, 101,
104)
WARNING
■During customization
As the hybrid system needs to be
operating during customization,
ensure that the vehicle is parked
in a place with adequate ventila-
tion. In a closed area such as a
garage, exhaust gases including
harmful carbon monoxide (CO)
may collect and enter the vehicle.
This may lead to death or a seri-
ous health hazard.
NOTICE
■During customization
To prevent 12-vo lt battery dis-
charge, ensure that the hybrid
system is operating while custom-
izing features.
Customizable Features
FunctionDefault settingCustomized
setting
Predictive efficient driveOnOffO––
Function*1Default settingCustomized setting
Language*2English
Canadian French
OO–Mexican Span- ish
A
B
C
ABC
ABC

5518-3. Initialization
8
Vehicle specifications
8-3.Initialization
Items to initialize
The following items must be initialized for normal system
operation after such cases as the battery being reconnected,
or maintenance being performed on the vehicle:
List of the items to initialize
ItemWhen to initializeReference
Maintenance required
reminder messageAfter the maintenance is per-
formedP.403
Oil maintenanceAfter the maintenance is per-
formedP.415
Tire pressure warning system
• When rotating the tires
• When changing the tire
• After registering the ID codes
P.427

566What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your keys or
mechanical keys, new genu-
ine keys or mechanical keys
can be made by your Toyota
dealer. ( P.500)
 If you lose your electronic
keys, the risk of vehicle theft
increases significantly. Con-
tact your Toyota dealer imme-
diately. ( P.500)
 Is the key battery weak or
depleted? ( P.444)
 Vehicles with entry function:
Is the power switch in ON?
When locking the doors, turn
the power switch off.
( P.237)
 Vehicles with entry function:
Is the electronic key left inside
the vehicle? When locking the doors,
make sure that you have the
electronic key on your person.
 The function may not operate
properly due to the condition
of the radio wave. ( P.166)
 Is the child-protector lock set?
The sliding door cannot be
opened from inside the vehi-
cle when the lock is set. Open
the sliding door from outside
and then unlock the child-pro-
tector lock. ( P.142)
 Did you press the power
switch while firmly depress-
ing the brake pedal?
( P.234)
 Is the shift lever in P?
( P.234)
 Is the electronic key any-
where detectable inside the
vehicle? ( P.165)
 Is the electronic key battery
weak or depleted?
In this case, the hybrid sys-
tem can be started in a tem-
If you have a problem,
check the following before
contacting your Toyota
dealer.
The doors cannot be
locked, unlocked, opened
or closed
You lose your keys
The doors cannot be
locked or unlocked
The sliding door cannot
be opened
If you think something is
wrong
The hybrid system does
not start