tires TOYOTA SIENNA HYBRID 2021 (in English) Workshop Manual

4987-2. Steps to take in an emergency
76 ft•lbf (103 N•m, 10.5 kgf•m)
5Stow the flat tire, tire jack and
all tools.
■The compact spare tire
●The compact spare tire is identi-
fied by the label “TEMPORARY
USE ONLY” on the tire sidewall.
Use the compact s pare tire tem-
porarily, and only in an emer-
gency.
●Make sure to check the tire infla-
tion pressure of the compact
spare tire. ( P.525)
■When using the compact spare
tire
As the compact sp are tire is not
equipped with a tire pressure warn-
ing valve and transmitter, low infla-
tion pressure of the spar e tire will
not be indicated by the tire pressure
warning system. Also, if you replace
the compact spare tire after the tire
pressure warning light comes on,
the light remains on.
■When the compact spare tire is
attached
The vehicle height may become
lower when driving with the compact
spare tire compared to when driving
with standard tires.
■If you have a flat front tire on a
road covered with snow or ice
Install the compact spare tire on one
of the rear wheels of the vehicle.
Perform the following steps and fit
tire chains to the front tires: 1
Replace a rear tire with the com-
pact spare tire.
2 Replace the flat front tire with the
tire removed from the rear of the
vehicle.
3 Fit tire chains to the front tires.
WARNING
■When using the compact
spare tire
●Remember that the compact
spare tire provided is specifi-
cally designed for use with your
vehicle. Do not use your com-
pact spare tire on another vehi-
cle.
●Do not use more than one com-
pact spare tire simultaneously.
●Replace the comp act spare tire
with a standard tire as soon as
possible.
●Avoid sudden acceleration,
abrupt steering, sudden brak-
ing and shifting operations that
cause sudden engine braking.
■When the compact spare tire
is attached
The vehicle speed may not be
correctly detected, and the follow-
ing systems may not operate cor-
rectly:
• ABS & Brake assist
• VSC/Trailer Sway Control
• TRAC
• Dynamic radar cruise control with full-speed range
• PCS (Pre-Collision System)
• EPS
• LTA (Lane Tracing Assist)
• Tire pressure warning system
• AHB (Automatic High Beam)

5147-2. Steps to take in an emergency
1Stop the hybrid system. Set
the parking brake and shift
the shift lever to P.
2 Remove the mud, snow or
sand from around the stuck
tire.
3 Place wood, stones or some
other material to help provide
traction under the tires.
4 Restart the hybrid system
5 Shift the shift lever to D or R
and release the parking
brake. Then, while exercising
caution, depress the acceler-
ator pedal.
■When it is difficult to free the
vehicle
Press to turn off TRAC.
(  P.336)
NOTICE
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust, etc.).
●Do not use any coolant additive.
If the vehicle becomes
stuck
Carry out the following pro-
cedures if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:
Recovering procedure

5258-1. Specifications
8
Vehicle specifications
17-inch tires
18-inch tires
Tires and wheels
Tire sizeP235/65R17 103T, T155/80R17 111M (spare tire
if equipped)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160
km/h]) (in countries wher e such speeds are per-
mitted by law) Add 3 ps i (20 kPa, 0.2 kgf/cm
2 or
bar) to the front tires and rear tires.
Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size17 x 7J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire sizeP235/60R18 102V, T155/80R17 111M (spare tire
if equipped)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160
km/h]) (in countries wher e such speeds are per-
mitted by law) Add 3 ps i (20 kPa, 0.2 kgf/cm
2 or
bar) to the front tires and rear tires.
Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)

5268-1. Specifications
20-inch tires
A: Wedge base bulbs (amber)
Wheel size18 x 7 1/2J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size235/50R20 100V, T155/80 R17 111M (spare tire
if equipped)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Rear:
36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160
km/h]) (in countries wher e such speeds are per-
mitted by law) Add 3 ps i (20 kPa, 0.2 kgf/cm
2 or
bar) to the front tires and rear tires.
Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size20 x 7 1/2J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs
Light bulbsBulb No.WType
Exterior
Rear turn signal lightsWY21W21A
Back-up lightsW16W16B
License plate lightsW5W5B
Interior
Vanity lights1.4C
Second row personal lights8B
Third row interior lights8C
Luggage compartment light5B
Front door courtesy lights5B

5318-1. Specifications
8
Vehicle specifications
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a
bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire d oes not have a tube and air is directly put in to the tire. A
tube type tire has a tube inside t he tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure (P.534)
Maximum cold tire inflation pressure ( P.534)
This means the pressure to w hich a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires ( P.425)
An all season tire has “M+S” on the sidewal l. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY”
A compact spare tire is identifi ed by the phrase “TEMPORARY USE ONLY”
molded on its sidewall. This tire is designed for temporary emergency use
only.
Type A
DOT symbol
*
Tire Identification Number
(TIN) Tire manufacturer’s identifi-
cation mark
Tire size code
Manufacturer’s optional tire
type code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the
tire conforms to applicable Fed-
eral Motor Vehicle Safety Stan-
dards.
E
F
G
H
I
J
K
Typical DOT and Tire
Identification Number
(TIN)
A
B
C
D
E
F
G

5338-1. Specifications
8
Vehicle specifications
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been pre-
pared in accordance with regu-
lations issued by the National
Highway Traffic Safety Adminis-
tration of the U.S. Department of
Transportation.
It provides the purchasers
and/or prospective purchasers
of Toyota vehicles with informa-
tion on uniform tire quality grad-
ing.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
■DOT quality grades
All passenger vehicle tires must
conform to Federal Safety
Requirements in addition to
these grades. Quality grades
can be found where applicable on the tire sidewall between
tread shoulder and maximum
section width.
For example: Treadwear 200 Trac-
tion AA Temperature A
■Treadwear
The treadwear grade is a com-
parative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course.
For example, a tire graded 150
would wear one and a half (1 - 1/2)
times as well on the government
course as a tire graded 100.
The relative performance of tires
depends upon the ac tual conditions
of their use. Performance may dif-
fer significantly from the norm due
to variations in dri ving habits, ser-
vice practices and differences in
road characteristics and climate.
■Traction AA, A, B, C
The traction grades, from high-
est to lowest, are AA, A, B and
C, and they represent the tire’s
ability to stop on wet pavement
as measured under controlled
conditions on specified govern-
ment test surfaces of asphalt
and concrete.
A tire marked C may have poor
traction performance.
Warning: The traction grade
assigned to this tire is based on
braking (straight ahead) traction
tests and does not include corner-
ing (turning) traction.
Uniform Tire Quality
Grading
A
B
C
D
E
F
G
H
I
J
K

5348-1. Specifications
■Temperature A, B, C
The temperature grades are A
(the highest), B, and C, repre-
senting the tire’s resistance to
the generation of heat and its
ability to dissipate heat when
tested under controlled condi-
tions on a specified indoor labo-
ratory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure.
Grade C corresponds to a level of performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law.
Warning: The temperature grades
of a tire assume tha
t it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked
for three hours or more, or has not been driven
more than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a
tire may be inflated, shown on the sidewall of
the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of transmis-
sion, power steering, power brakes, power
windows, power seats, radio and heater, to the
extent that these items are available as factory-
installed equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including th e maximum capacity of
fuel, oil and coolant, and if so equipped, air con-
ditioning and additional weight optional engine

5548-3. Initialization
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
Oil maintenanceAfter the maintenance is per-
formedP.418
Tire pressure warning system
• When rotating the tires
• When changing the tire
• After registering the ID codes
P.430

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

Alphabetical Index581
Digital Rear-view Mirror........ 192
Inside rear view mirror.......... 187
Intuitive parking assist .......... 308
LTA (Lane Tracing Assist).... 275
Parking Support Brake function (rear-crossing vehicles) ...... 301
Parking Support Brake function (static objects) .................... 308
Rain-sensing windshield wipers ........................................... 256
RCTA ................................... 301
Toyota Safety Sense ............ 262
Service plug .............................. 83
Shift lever ................................ 238 If the shift lever cannot be shifted from P................................. 240
Shift lock system .................... 240
Shopping bag hooks .............. 387
Side airbags .............................. 41
Side auxiliary box ................... 372
Side marker lights Light switch .......................... 248
Replacing light bulbs ............ 451
Side mirrors ............................ 198 Adjustment ........................... 198
BSM (Blind Spot Monitor)..... 300
Folding ................................. 199
Heaters................................. 350
Linked mirror function when reversing ............................ 199
Side turn signal lights Replacing light bulbs ............ 451
Turn signal lever................... 242
Side windows ...... ................... 201
Sliding doors Canceling the power sliding door system ................................ 148
Hands Free Power Sliding doors
........................................... 141
Keyless entry........................ 138
Power sliding doors .............. 137
Sliding door child -protectors. 142 Wireless remote control........139
Smart key system ...................164 Antenna location...................164
Entry functions......132, 138, 151
Starting the hybrid system ....231
Warning message . ...............477
Snow tires ...............................343
Spare tire Storage location ...................492
Specifications .........................518
Speedometer .....................97, 101
Sport mode..............................333
Steering lock Column lock releas e .............232
Steering lock system warning message .............................232
Steering wheel Adjustment ...........................185
Heated steering wheel..........361
Meter control switches..........105
Stop lights Replacing light bulbs ............451
Storage feature .. .....................366
Storage precaution s ...............367
Stuck If the vehicle becomes stuck 514
Suggestion functi on ...............117
Sunglass holder.... ..................370
Sunshade ........................204, 385
Sunshades ..............................385
Sun visors ...............................374
Switches “ODO TRIP”switch ..........99, 103
“SOS” button ..........................75
Automatic High Beam switch 250
Brake hold switch .................246
BSM (Blind Spot M onitor) .....301
Digital Rear-view Mirror control switches..............................188
Door lock switch ...................135
Driving mode select switch ...333
Driving position memory