2021 TOYOTA SIENNA HYBRID warning

5498-2. Customization
8
Vehicle specifications
■PCS (Pre-Collision System) (P.267)
■LTA (Lane Tracing Assist) (P.275)
■RSA (Road Sign Assist)* ( P.285)
Shift position linked rear win-
dow wiper operation
(  P.258)
Only once
Off
––OContinuous
FunctionDefault settingCustomized
setting
PCS (Pre-Collision System)OnOff–O–
Adjust alert timingMiddleEarly–O–Late
FunctionDefault settingCustomized setting
Lane centering functionOnOff–O–
Steering assist functionOnOff–O–
Alert typeSteering wheel vibrationBuzzer–O–
Alert sensitivityHighStandard–O–
Vehicle sway warning func-
tionOnOff–O–
Vehicle sway warning sensi-
tivityStandardLow–O–High
FunctionDefault settingCustomized setting
RSA (Road Sign Assist)OnOff–O–
Excess speed notification
methodDisplay only
No notification
–O–Display and buzzer
FunctionDefault settingCustomized settingABC
ABC
ABC
ABC

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

569What to do if... (Troubleshooting)
weak or depleted?
In this case, the hybrid sys-
tem can be started in a tem-
porary way. (P.505)
 Is the 12-volt battery dis-
charged? ( P.506)
 Is the power switch in ON?
If you cannot release the shift
lever by depressing the brake
pedal with the power switch in
ON ( P.240)
 It is locked automatically to
prevent theft of the vehicle.
( P.232)
 Is the window lock switch
pressed?
The power window except for
the one at the driver’s seat
cannot be operated if the win-
dow lock switch is pressed.
( P.203)
 The auto power off function
will be operated if the vehicle is left in ACC or ON (the
hybrid system is not operat-
ing) for a period of time.
(
P.235)
 The seat belt reminder light is
flashing
Are the driver and the passengers
wearing the seat belts? (
P.473)
The parking brake indicator is
on
Is the parking br ake released?
( 
P.243)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.466, 477)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the
alarm sounds. ( P.89)
To stop the alarm, turn the power
switch to ON or start the hybrid sys-
tem.
 Is the message displayed on
the multi-information display?
Check the message on the
The shift lever cannot be
shifted from P even if you
depress the brake pedal
The steering wheel can-
not be turned after the
hybrid system is stopped
The windows do not open
or close by operating the
power window switches
The power switch is
turned off automatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds (if
equipped)
A warning buzzer sounds
when leaving the vehicle

570What to do if... (Troubleshooting)
multi-information display.
(P.477)
 When a warning light turns on
or a warning message is dis-
played, refer to P.466, 477.
 Vehicles without spare tire:
Stop the vehicle in a safe
place and repair the flat tire
temporarily with the emer-
gency tire puncture repair kit.
( P.481)
 Vehicles with spare tire: Stop
the vehicle in a safe place and
replace the flat tire with the
spare tire. ( P.491)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.514)
A warning light turns on
or a warning message is
displayed
When a problem has
occurred
If you have a flat tire
The vehicle becomes
stuck

571Alphabetical Index
Alphabetical Index
A
A/C ................................... 348, 358Air conditioning filter ............. 441
Eco air conditioning mode .... 352
Front automatic air conditioning system ................................ 348
Front seat concentrated airflow mode (S-FLOW) ................. 354
Rear automatic air conditioning system ................................ 358
ABS (Anti-lock Brake System) ............................................... 335Function ............................... 335
Warning light ........................ 468
ACA (Active Cornering Assist) ............................................... 335
Acoustic Vehicle Alerting Sys- tem ........................................... 81
Active Cornering Assist (ACA) ............................................... 335
Airbags ...................................... 41 Airbag operating conditions.... 44
Airbag precautions for your child............................................. 46
Airbag warning light.............. 468
Correct driving posture ........... 33
Curtain shield airbag operating conditions ............................. 44
Curtain shield airbag precautions ............................................. 46
Front passenger occupant clas- sification system ................... 51
General airbag precautions .... 46
Locations of airbags ............... 41
Modification and disposal of air- bags ..................................... 49
Seat cushion airbag ............... 41
Side airbag operating conditions ............................................. 44
Side airbag precautions ......... 46
Side and curtain shield airbags operating conditions .............44
Side and curtain shield airbags precautions ...........................46
SRS airbags ...........................41
SRS warning light .................468
Air conditioning filter .............441
Air conditioning system.348, 358 Air conditioning filter .............441
Changing the rear seat settings...........................................356
Eco air conditioning mode ....352
Front automatic air conditioning system ................................348
Front seat concent rated airflow
mode (S-FLOW) .................354
Rear automatic air conditioning system ................................358
Alarm .........................................89 Alarm ......................................89
Warning buzzer .. ..................466
Anchor brackets ... ..............60, 71
Antenna (Smart key system) .164
Anti-lock brake system (ABS)335 Function................................335
Warning light ........................468
Approach warning ..................295
Armrest ......... ......................... ..386
Assist grips .............................386
Automatic air conditioning sys- tem .................................348, 358Air conditioning filter .............441
Eco air conditioning mode ....352
Automatic High Beam ............250
Automatic light control system ...............................................249
Average fuel consumption ....125
Average fuel economy ...........106
Average vehicle speed ...111, 125
B
Back door ................................150 Hands Free Power Back door

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 Index573
Coat hooks .............................. 388
Condenser .............................. 420
Console box ............................ 367
Consumption screen.............. 122
Conversation mirror ............... 370
CoolantChecking .............................. 419
Preparing and c hecking before
winter.................................. 343
Warning light ........................ 467
Cooling system ...................... 419 Hybrid system overheating... 511
Cruise control Dynamic radar cruise control with full-speed range .......... 288
Cup holders ............................ 368
Current fuel consumption ..... 125
Current fuel economy ............ 106
Curtain shield airbags ............. 41
Customizable features ........... 540
D
Daytime running light system248 Replacing light bulbs ............ 451
Defogger Outside rear view mirrors ..... 350
Rear window ........................ 350
Windshield............................ 349
Digital Rear-view Mirror ......... 188 Adjustment ........................... 190
Cleaning ............................... 193
Dinghy towing ........................ 230
Display BSM (Blind Spot Monitor)..... 300
Consumption screen ............ 122
Drive information .................. 111
Driving information ............... 106
Dynamic radar cruise control with full-speed range .......... 288
Energy monitor ..................... 122
Head-up display ................... 118
Intuitive parking assist .......... 308 LTA (Lane Traci
ng Assist) ....281
Multi-information display.......104
RCD (Rear Camera Detection) ...........................................315
RCTA ....................................300
Warning messages ...............477
Do-it-yourself maintenance..................407, 411
Door lock Back door .............................150
Front doors ...........................132
Sliding doors.........................137
Smart key system .................164
Wireless remote control........130
Doors Automatic door locking and unlocking system ................136
Back door .............................150
Door glasses ........................201
Door lock ..............................132
Front doors ...........................132
Open door warning buzzer ...136
Outside rear view mirrors .....198
Sliding door child-protectors .142
Sliding doors.........................137
Drive information ....................111
Driver’s seat belt reminder light ...............................................473
Drive-start control ..................209
Driving Break-in tips .........................209
Correct posture .......................33
Driving mode select switch ...333
Hybrid vehicle dri ving tips .....341
Procedures ...........................208
Winter drive tips....................343
Driving informatio n display ...106
Driving mode select switch ...333
Driving position memory .......178 Memory recall function .........180
Power easy access system ..178
Driving support system informa-

574Alphabetical Index
tion display ........................... 110
Dynamic radar cruise control with full-speed rangeFunction ............................... 288
Warning message ................ 477
E
ECB (Electronically Controlled Brake System) ...................... 335
Eco drive mode ...................... 333
EDR (Event data recorder)......... 8
E-Four (Electronic On-Demand AWD system) ........................ 336
Elapsed time ........................... 111
Electric motor Location.................................. 79
Specification ......................... 520
Electric Power Steering (EPS) Function ............................... 336
Warning light ........................ 468
Electronically Controlled Brake System (ECB) ....................... 335
Electronic key Battery-saving function......... 165
If the electronic key does not operate properly ................. 504
Replacing the battery ........... 447
Emergency, in case of If a warning buzzer sounds .. 466
If a warning light turns on ..... 466
If a warning message is dis-played................................. 477
If the 12-volt battery is dis- charged .............................. 506
If the electronic key does not operate properly ................. 504
If the fuel filler door cannot be opened ............................... 503
If the hybrid sy stem will not start
........................................... 501
If the vehicle is trapped in rising water .................................. 460 If you have a flat tire .....481, 491
If you lose your keys.............502
If you think something is wrong
...........................................465
If your vehicle becomes stuck ...........................................514
If your vehicle has to be stopped in an emergency .................459
If your vehicle needs to be towed ...........................................462
If your vehicle ove rheats ......511
Emergency flashers ...............458
Energy monitor .......................122
Engine Compartment........................416
Hood .....................................413
Identification number ............520
Engine coolant Capacity ...............................522
Checking ..............................419
Preparing and checking before winter ..................................343
Warning light ........................467
Engine coolant temperature gauge ...............................97, 101
Engine oil Capacity ...............................521
Checking ..............................416
Preparing and checking before winter ..................................343
Warning light ........................467
Engine oil maintenance data .418
Enhanced Vehicle Stability Con- trol (Enhanced VSC ) .............335
Enhanced VSC (Enhanced Vehi- cle Stability Control).............335
EPS (Electric Po wer Steering)
Function................................336
Warning light ........................468
EV drive mode.........................236
Event data recorder (EDR) .........8
EV indicator...............................80