fuel type TOYOTA SIENNA HYBRID 2021 (in English) User Guide

5017-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the
cause of the problem:
The electronic key may not be
functioning properly.
( P.504)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle. ( P.259)
 There may be a malfunction
in the immobilizer system.
( P.88)
 There may be a malfunction
in the steering lock system.
 The hybrid system may be
malfunctioning due to an elec-
trical problem such as elec-
tronic key battery depletion or
a blown fuse. However,
depending on the type of mal-
function, an interim measure
is available to start the hybrid
system. ( P.501) One of the following may be the
cause of the problem:

The 12-volt battery may be
discharged. ( P.506)
 The 12-volt battery terminal
connections may be loose or
corroded. ( P.423)
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. ( P.506)
 One or both of the 12-volt bat-
tery terminals may be discon-
nected. ( P.423)
Contact your Toyota dealer if
the problem cannot be repaired,
or if repair procedures are
unknown.
When the hybrid system does
not start, the following steps can
be used as an interim measure
to start the hybrid system if the
power switch is functioning nor-
If the hybrid system
will not start
Reasons for the hybrid sys-
tem not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The hybrid system will not
start even though the cor-
rect starting procedure is
being followed ( P.231)
The interior lights and
headlights are dim, or the
horn does not sound or
sounds at a low volume
The interior lights and
headlights do not turn on,
or the horn does not
sound
Starting the hybrid sys-
tem in an emergency

5208-1. Specifications
■Engine number
The engine number is stamped on the engine block as shown.
Front
Engine
Model2.5 L 4-cylinder (A25A-FXS)
Type4-cylinder in line
, 4-cycle, gasoline
Bore and stroke3.44  4.07 in. (87.5  103.4 mm)
Displacement151.8 cu. in. (2487 cm3)
Valve clearanceAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane Rating87 (Research Octane Number 91) or
higher
Fuel tank capacity (Reference)18 gal. (68.2 L, 15 Imp.gal.)
Electric motor (traction motor)
TypePermanent magnet synchronous motor
Maximum output134 kW
Maximum torque199 ft•lbf (270 N•m, 27.5 kgf•m)

5218-1. 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
and turn off the hybrid system,
wait more than 5 minutes, 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: API SN/RC 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.)

5298-1. Specifications
8
Vehicle specifications
emission control system may be
adversely affected.
The malfunction indicator lamp on
the instrument cluster may come on.
If this happens, contact your Toyota
dealer for service.
■If your engine knocks
●Consult your Toyota dealer.
●You may occasionally notice light
knocking for a short time while
accelerating or driving uphill. This
is normal and there is no need for
concern.
NOTICE
■Notice on fuel quality
●Do not use impro per fuels. If
improper fuels are used, the
engine will be damaged.
●Do not use leaded gasoline.
Leaded gasoline can cause
damage to your vehicle’s three-
way catalytic converters caus-
ing the emission control system
to malfunction.
●Do not use gasohol other than
the type previously stated.
Other gasohol may cause fuel
system damage or vehicle per-
formance problems.
●Using unleaded gasoline with
an octane number or rating
lower than the l evel previously
stated will cause persistent
heavy knocking.
At worst, this will lead to engine
damage.
■Fuel-related poor driveability
If poor driveability (poor hot start-
ing, vaporization, engine knock-
ing, etc.) is encountered after
using a different type of fuel, dis-
continue the use of that type of
fuel.
■When refueling with gasohol
Take care not to spill gasohol. It
can damage your vehicle’s paint.

5428-2. Customization
*1: For details about each function: P.112
Units*2miles (MPG
US)
km (km/L)
OO–km (L/100 km)
miles (MPG Imperial)
Digital Speed*3OnOff–O–
EV indicatorOnOff–O–
Eco Guidance (ECO Acceler-
ator Guidance)OnOff–O–
Fuel EconomyTotal AverageTrip Average–O–Tank Average
Audio system linked displayOnOff–O–
Energy monitorOnOff–O–
AWD system displayOnOff–O–
Drive information type*4TripTotal–O–
Drive informatio n items (first
item)
*4Distance
Average Speed
–O–
Total Time
Drive information items (sec-
ond item)
*4Total Time
Average Speed
–O–
Distance
Trip Summary*4ECO Guid- anceDrive Info–O–
Pop-up displayOnOff–O–
Multi-Information display offOffOn–O–
Rear seat reminder functionOnOff–O–
Suggestion functionOn
On (when the vehicle is stopped)
O–O
Off
Function*1Default settingCustomized settingABC

Alphabetical Index575
F
Flat tire ............................ 481, 491Tire pressure warning system........................................... 427
Floor mats ................................. 32
Fluid Brake ............................ 420, 524
Hybrid transmission.............. 523
Rear differential .................... 523
Washer ................................. 421
Fog lights Replacing light bulbs ............ 451
Switch................................... 254
Footwell lights ..... ................... 363
Front door courtesy lights Wattage ................................ 526
Front doors .......... ................... 132
Front passenger’s seat belt reminder light ....................... 473
Front passenger occupant clas- sification system .................... 51
Front seat heaters .................. 361
Front seats .............................. 169 Adjustment ........................... 169
Cleaning ............................... 403
Correct driving posture ........... 33
Driving position memory....... 178
Head restraints ..................... 182
Memory recall function ......... 180
Power easy access system .. 178
Seat heaters ......................... 361
Seat position memory .......... 178
Seat ventilators .................... 361
Front side marker lights ........ 248 Light switch .......................... 248
Replacing light bulbs ............ 451
Front turn signal lights Replacing light bulbs ............ 451
Turn signal lever................... 242
Fuel Capacity ............................... 520 Fuel gauge .....................97, 101
Information .........
..................528
Refueling ..............................259
Type .............................520, 528
Warning light ........................472
Fuel consumption information Average fuel consumption ....125
Current fuel consumption .....125
Fuel filler door.........................260 If the fuel filler door cannot be opened ...............................503
Refueling ..............................259
Fuel gauge.........................97, 101
Fuses .......................................449
G
Garage door opene r ...............392
Gauges ..............................97, 101
Glove box ................................367
Grocery bag hooks .................387
H
Headlights ...............................248 Automatic High Beam system...........................................250
Light switch...........................248
Replacing light bulbs ............451
Wattage ................................526
Head restraints .......................182
Head-up display ......................118 Driving information display area...........................................118
Driving support system display area ....................................120
Head-up display switch ........119
Hybrid System Indicator .......121
Navigation system-linked display ...........................................118
Pop-up display......................120
Settings ................................119
Head-up display switch..........119

580Alphabetical Index
Rear seats ............................... 171Adjustment ........................... 171
Rear side marker lights Light switch .......................... 248
Replacing light bulbs ............ 451
Rear turn signal lights Replacing light bulbs ............ 451
Turn signal lever................... 242
Wattage ................................ 526
Rear view mirror Digital Rear-view Mirror........ 188
Inside rear view mirror.......... 186
Outside rear view mirrors ..... 198
Rear window defogger ........... 350
Rear window wiper ................. 257
Refrigerator ............................. 388
Refueling ................................. 259 Capacity ............................... 520
Fuel types..................... 520, 528
If the fuel filler door cannot be opened ............................... 503
Opening the fuel tank cap .... 260
Regenerative braking ............... 80
Replacing Electronic key battery ........... 447
Fuses ................................... 449
Light bulbs ............................ 451
Tires ..................................... 491
Wireless remote control battery........................................... 447
Reporting safety defects for U.S. owners................................... 556
Road Sign Assist .................... 285
RSA (Road Sign Assist) ......... 285
S
Safety Connect ......................... 75
Seat belt reminder light ......... 473
Seat belts .................................. 35 Adjusting the seat belt shoulder anchor height ....................... 39
Automatic Locking Retractor .. 39 Child restraint sys
tem installation
.............................................63
Cleaning and maintaining the seat belt ..............................403
Emergency Locking Retractor 38
How to wear your seat belt .....36
How your child should wear the seat belt ................................36
Pregnant women, proper seat belt use .................................35
Reminder light and buzzer.................................473
Seat belt extender ..................36
Seat belt pretensioners ..........39
SRS warning light .................468
Seat heaters ............................361
Seating capacity .....................218
Seat position memory ............178
Seats Adjustment precautions 170, 176
Adjustment ...................169, 171
Child seats/child restraint system installation ............................58
Cleaning ...............................403
Driving position memory .......178
Folding third seats ................174
Head restraint .......................182
Installing seco nd center seats
...........................................174
Properly sitting in the seat ......33
Removing second center seats ...........................................173
Seat heaters ....... ..................361
Seat position memory...........178
Seat ventilators.....................361
Stowing third seats ...............175
Seat ventilators .. .....................361
Sensor Automatic headlight system .249
Automatic High Beam system...........................................250
BSM (Blind Spot M onitor) .....301

600
GAS STATION INFORMATION
Auxiliary catch lever (P.413)
Fuel filler door opener switch ( P.260)
Fuel filler door ( P.260)
Tire inflation pressure ( P.525)
Hood lock release lever ( P.413)
Fuel tank capacity
(Reference)18 gal. (68.2 L, 15 Imp.gal.)
Fuel typeUnleaded gasoline onlyP.520
Cold tire infl ation pressureP.525
Engine oil capacity
(Drain and refill  reference)P.521
Engine oil typeP.521
A
B
C
D
E