2021 TOYOTA SIENNA HYBRID seat heater

3TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9
4-1. Before drivingDriving the vehicle......... 208
Cargo and luggage ....... 215
Vehicle load limits ......... 218
Trailer towing (without tow- ing package)................ 219
Trailer towing (with towing package) ..................... 220
Dinghy towing ............... 230
4-2. Driving procedures Power (ignition) switch .. 231
EV drive mode .............. 236
Hybrid transmission ...... 238
Turn signal lever ........... 242
Parking brake ................ 243
Brake Hold .................... 246
4-3. Operating the lights and wipers
Headlight switch ............ 248
AHB (Automatic High Beam) .................................... 250
Fog light switch ............. 254
Windshield wipers and washer......................... 254
Rear window wiper and washer......................... 257
4-4. Refueling Opening the fuel tank cap.................................... 259
4-5. Using the driving support
systems
Toyota Safety Sense 2.0 262
PCS (Pre-Collision System) .................................... 267LTA (Lane Tracing Assist)
.................................... 275
RSA (Road Sign Assist) 285
Dynamic radar cruise control with full-speed range ... 288
BSM (Blind Spot Monitor) .................................... 299
Intuitive parking assist ... 308
RCD (Rear Camera Detec- tion) function ................ 315
PKSB (Parking Support Brake) .......................... 319
Parking Support Brake func- tion (static objects) ...... 323
Parking Support Brake func- tion (rear-crossing vehicles).................................... 329
Driving mode s elect switch
.................................... 333
Driving assist systems ... 335
4-6. Driving tips Hybrid vehicle driving tips.................................... 341
Winter driving tips .......... 343
5-1. Using the ai r conditioning
system and defogger
Front automatic air condition- ing system ................... 348
Re ar automatic air condition-
i

ng system ................... 358
Heated steering wheel/seat heaters/seat ventilators 361
5-2. Using the interior lights Interior lights list ............ 363
4Driving
5Interior features

347
5
5
Interior features
Interior features
5-1. Using the air conditioning system and defogger
Front automatic air condi- tioning system ........... 348
Rear automatic air condi- tioning system ........... 358
Heated steering wheel/seat heaters/seat ventilators.................................. 361
5-2. Using the interior lights Interior lights list .......... 363
5-3. Using the storage features List of storage features 366
Luggage compartment fea- tures .......................... 372
5-4. Using the other interior features
Other interior features . 374
Garage door opener.... 392

3615-1. Using the air conditioning system and defogger
5
Interior features
*: If equipped
Turns the heated steering wheel
on/off
The indicator light comes on when
the heated steering wheel is oper-
ating.
■Operation condition
The power switch is in ON.
Each time the switch is pressed,
the operation condition changes
as follows.
Hi (3 segments lit)  Mid (2
segments lit)  Lo (1 segment
Heated steering
wheel*/seat heat-
ers*/seat ventilators*
 Heated steering wheel
Warm up the grip of the steer-
ing wheel
 Seat heaters
Warm up the seat upholstery
 Seat ventilators
Maintain good ventilation by
sucking air through the seat
upholstery
WARNING
■To prevent minor burn inju-
ries
Care should be taken if anyone in
the following categories comes in
contact with the steering wheel or
seats when the heater is on:
●Babies, small children, the
elderly, the sick and the physi-
cally challenged
●Persons with sensitive skin
●Persons who are fatigued
●Persons who have taken alco-
hol or drugs that induce sleep
(sleeping drugs, cold remedies,
etc.)
NOTICE
■To prevent damage to the
seat heaters and seat ventila-
tors
Do not put heavy objects that
have an uneven surface on the
seat and do not stick sharp
objects (needles, nails, etc.) into
the seat.
■To prevent 12-volt battery dis-
charge
Do not use the functions when the
hybrid system is off.
Heated steering wheel
Operating the seat heat-
ers

3625-1. Using the air conditioning system and defogger
lit)  Off
The level indicato r lights up during
operation.
Front
Rear (second outboard seats)
(if equipped)
■Operation condition
The power swit ch is in ON. Each time the switch is pressed,
the operation condition changes as
follows.
Hi (3 segments lit)
 Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The level indicato r lights up during
operation.
■Operation condition
The power switch is in ON.
■Air conditioning system-linked
control mode
When a seat ventilator is set to Hi,
the fan speed of the seat ventilator
may increase according to the fan
speed of the air conditioning sys-
tem.
WARNING
■To prevent causes of over-
heating and minor burn inju-
ries
Observe the following precautions
when using a seat heater:
●Do not cover the seat with a
blanket or cushion when using
the seat heater.
●Do not use seat heater more
than necessary.
Operating the seat venti-
lators (front seats)

4046-1. Maintenance and care
WARNING
■Water in the vehicle
●Do not splash or spill liquid in
the vehicle, such as on the floor,
on the front seats, in the hybrid
battery (traction battery) air
intake vent or in the luggage
compartment. ( P.85)
Doing so may cause the hybrid
battery, electrical components,
etc. to malfunction or catch fire.
●Do not get any of the SRS com-
ponents or wiring in the vehicle
interior wet.
(  P.42)
An electrical malfunction may
cause the airbags to deploy or
not function properly, resulting
in death or serious injury.
●Vehicles with wireless charger:
Do not let the wireless charger
(  P.381) get wet. Failure to do
so may cause the charger to
become hot and cause burns or
could cause electric shock
resulting in death or serious
injury.
■Cleaning the interior (espe-
cially instrument panel)
Do not use a polis h wax or polish
cleaner. The instrument panel
may reflect off the windshield,
obstructing the dr iver’s view and
leading to an accident, resulting in
death or serious injury.
NOTICE
■Cleaning detergents
●Do not use the following types
of detergent, as they may dis-
color the vehicle interior or
cause streaks or damage to
painted surfaces:
• Non-seat portions: Organic sub- stances such as benzene or
gasoline, alkaline or acidic solu-
tions, dye, and bleach
• Seats: Alkaline or acidic solu- tions, such as thinner, benzene,
and alcohol
●Do not use a polish wax or pol-
ish cleaner. The instrument
panel’s or other interior part’s
painted surface may be dam-
aged.
■Water on the floor
Do not wash the v ehicle floor with
water.
Vehicle systems such as the
audio system may be damaged if
water comes into contact with
electrical components such as the
audio system above or under the
floor of the vehicle. Water may
also cause the body to rust.
■When cleaning the inside of
the windshield
Do not allow glass cleaner to con-
tact the lens. Also, do not touch
the lens. ( P.262)
■Cleaning the inside of the rear
window
●Do not use a gla ss cleaner to
clean the rear window, as this
may cause damage to the rear
window defogger heater wires.
Use a cloth dampened with
lukewarm water to gently wipe
the window clean. Wipe the win-
dow in strokes running parallel
to the heater wires.

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

572Alphabetical Index
........................................... 155
Power back door .................. 153
Wireless remote control ....... 153
Back-up lights Replacing light bulbs ............ 451
Wattage ................................ 526
Battery (12-volt battery) ......... 422 If the 12-volt battery is dis-charged .............................. 506
Preparing and c hecking before
winter.................................. 343
Replacing ............................. 508
Warning light ........................ 466
Battery (traction battery) ......... 83
Blind Spot Monitor (BSM) ...... 299 Blind Spot Monitor function .. 302
Rear Cross Traffic Alert function........................................... 305
Bottle holders ......................... 369
Brake Brake Hold ........................... 246
Fluid ............................. 420, 524
Parking brake ....................... 243
Regenerative braking ............. 80
Warning light ........................ 466
Brake assist ............................ 335
Brake Hold .............................. 246
Break-in tips ........ ................... 209
Brightness control Instrument panel light control .......................... 99, 103
BSM (Blind Spot Monitor) ...... 299 Blind Spot Monitor function .. 302
Rear Cross Traffic Alert function........................................... 305
C
Care Aluminum wheels ................. 400
Exterior ................................. 400
Interior .................................. 403
Seat belts ............................. 403 Cargo capacity ................215, 218
Cargo hooks............................372
Chains......................................345
Child-protectors......................142
Child restraint system ..............58
Fixed with a LATCH system ...68
Fixed with a seat belt..............63
Front passenger occupant clas-sification system ...................51
Points to remember ................58
Riding with children ................57
Types of child restraint system installation method ...............60
Using an anchor bracket ........71
Child safety ...............................57 12-volt battery precautions .................422, 509
Airbag precautions .................46
Back door precautions..........150
Child restraint system .............60
Heated steering wheel and seat heater precautio ns..............361
How your child should wear the seat belt ................................36
Moon roof precautions..........205
Power window lock switch ....203
Power window precautions...202
Removed key battery precau- tions ....................................448
Seat belt extender precautions .............................................36
Seat belt precautions..............35
Seat heater precautions .......361
Cleaning ..........................400, 403 Aluminum wheels .................400
Exterior .................................400
Hybrid battery (tr action battery)
air intake vents and filters...443
Interior ..................................403
Radar sensor ........................263
Seat belts .............................403
Clock ................................100, 104

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