2021 TOYOTA SIENNA HYBRID heater

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.

4056-1. Maintenance and care
6
Maintenance and care
Remove dirt using a water-
dampened soft cloth or syn-
thetic chamois.
 Wipe the surface with a dry
soft cloth to remove any
remaining moisture.
■Cleaning the areas with satin-
finish metal accents
The metal areas use a layer of real
metal for the surface. It is necessary
to clean them regularly. If dirty areas
are left uncleaned for long periods
of time, they may be difficult to
clean.
 Remove dirt and dust using a
vacuum cleaner.
 Wipe off any excess dirt and
dust with a soft cloth damp-
ened with diluted detergent.
Use a diluted water solution of
approximately 5% neutral wool
detergent.
Wring out any excess water
from the cloth and thoroughly
wipe off all remaining traces
of detergent.
 Wipe the surface with a dry,
soft cloth to remove any remaining moisture. Allow the
leather to dry in a shaded and
ventilated area.
■Caring for leather areas
Toyota recommends cleaning the
interior of the vehicle at least twice a
year to maintain t he quality of the
vehicle’s interior.
 Remove dirt and dust using a
vacuum cleaner.
 Wipe it off with a soft cloth
dampened with neutral deter-
gent diluted to approximately
1%.
 Wring out any excess water
from the cloth and thoroughly
wipe off remaining traces of
detergent and water.
NOTICE
●Be careful not to scratch or
damage the heater wires.
Cleaning the areas with
satin-finish metal accents
(if equipped)
Cleaning the leather areas
NOTICE
■Preventing damage to leather
surfaces
Observe the following precautions
to avoid damage to and deteriora-
tion of leather surfaces:
●Remove any dust or dirt from
leather surfaces immediately.
●Do not expose the vehicle to
direct sunlight for extended peri-
ods of time. Park the vehicle in
the shade, especially during
summer.
●Do not place items made of
vinyl, plastic, or containing wax
on the upholstery, as they may
stick to the leather surface if the
vehicle interior heats up signifi-
cantly.
Cleaning the synthetic
leather areas

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

576Alphabetical Index
Heated steering wheel ........... 361
HeatersFront automatic air conditioning system ................................ 348
Heated steering wheel ......... 361
Outside rear view mirrors ..... 350
Rear automatic air conditioning system ................................ 358
Seat heaters ......................... 361
High mounted stoplight Replacing light bulbs ............ 451
Hill-start assist control .......... 335
Hood ........................................ 413
Hooks Cargo hooks ......................... 372
Coat hooks ........................... 388
Grocery bag hooks ............... 387
Retaining hooks (floor mat) .... 32
Horn ......................................... 186
Hybrid battery (tr action battery)
Location.................................. 83
Specification ......................... 521
Hybrid battery (traction battery) air intake vents ............... 85, 443
Hybrid battery (traction battery) air intake vents and filters ... 443
Hybrid battery air vent ............. 85
Hybrid system .......................... 79 ACC...................................... 234
Acoustic Vehicle Alerting System............................................. 81
Emergency shut off system .... 86
Energy monitor/consumption screen ................................ 122
EV drive mode...................... 236
High voltage components....... 83
How to start the hybrid system ........................................... 231
Hybrid battery (traction battery) air vents.............................. 443
Hybrid System In dicator . 97, 101
Hybrid system precautions ..... 83 Hybrid vehicle dri
ving tips .....341
If the hybrid sys tem will not start
...........................................501
If your vehicle has to be stopped in an emergency .................459
Ignition switch (power switch) ...........................................231
Overheating ..........................511
Power (ignition) switch .........231
Regenerative braking .............80
Starting the hybrid system ....231
Hybrid System Indicator ..................98, 102, 121
Hybrid transmissio n ...............238
S mode .................................241
I
I/M test .....................................410
Identification Engine ..................................520
Vehicle..................................519
Ignition switch (power switch) ...............................................231Auto power off fun ction.........235
Changing the power switch modes.................................234
If your vehicle has to be stopped in an emergency .................459
Starting the hybrid system ....231
Immobilizer system ..................88
Indicators ..................................95
Initialization Items to initialize ...................554
Oil maintenance ...................418
Tire pressure warning system...........................................430
Inside rear view m irror ...186, 188
Instrument panel light control .............................99, 103
Interior lights...........................363 Switch ...................................364
Wattage ................................526

Alphabetical Index579
P
Panic mode ............................. 130
Parking assist sensors (intuitive parking assist) ...................... 308
Parking brake Operation ............................. 243
Parking brake engaged warning buzzer ................................ 245
Warning light ........................ 472
Warning message ................ 244
Parking lights Light switch .......................... 248
Replacing light bulbs ............ 451
Parking Support Brake (PKSB) ............................................... 319Indicator ................................. 95
Parking Support Brake function (rear-crossing vehicles) ...... 329
Parking Support Brake function (static objects) .................... 323
Warning light ........................ 470
PCS (Pre-Collision System) Enabling/disabling the pre-colli-sion system ........................ 269
Function ............................... 267
Warning light ........................ 469
Warning message ........ 265, 480
Personal lights ....................... 364 Switch................................... 364
Wattage ................................ 526
PKSB (Parking Support Brake) ............................................... 319Indicator ................................. 95
Parking Support Brake function (rear-crossing vehicles) ...... 329
Parking Support Brake function (static objects) .................... 323
Warning light ........................ 470
Power back door switch ........ 154
Power outlets .................. 374, 375
Power sliding door main switch ...............................................149
Power steering (Electric Power Steering system)...................336Warning light ........................468
Power switch...........................231 Auto power off fun ction.........235
Changing the power switch modes.................................234
Starting the hybrid system ....231
Power windows Door lock linked window opera-tion......................................202
Jam protection function ........201
Operation..............................201
Window lock switch ..............203
Pre-Collision System (PCS) Enabling/disabling the pre-colli-sion system ........................269
Function................................267
Warning light ........................469
Warning messag e ........265, 480
R
Radar cruise control
Dynamic radar cruise control with full-speed range ..........288
Radiator ...................................420
RCD (Rear Came ra Detection)
Function................................315
Warning message . ...............317
RCTA (Rear Cross Traffic Alert) RCTA Function .....................305
Warning message . ...............301
Rear automatic air conditioning system ...................................358
Rear Cross Traffic Alert (RCTA) ...............................................299
Rear heater system ................358
Rear passengers’ seat belt reminder light........................473
Rear seat Head restraints .....................182

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