2023 TOYOTA SIENNA HYBRID stop start

5107-2. Steps to take in an emergency
“LOW” line
5 Add coolant if necessary.
Water can be us ed in an emer-
gency if engine coolant is unavail-
able.
6 Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operates and
to check for coolant leaks
from the radiator or hoses.
The fan operates when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fan is op erating by check-
ing the fan sound and air flow. If it is
difficult to check th ese, turn the air
conditioning system on and off
repeatedly. (The f an may not oper-
ate in freezing temperatures.)
7 If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Toyota dealer.
■If “Hybrid System Over-
heated Output Power
Reduced” is shown on the
multi-information display
1 Stop the vehicle in a safe
place.
2 Stop the hybrid system and
carefully lift the hood.
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the
C
A
B

5117-2. Steps to take in an emergency
7
When trouble arises
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be used in an emer-
gency if power control unit coolant
is unavailable.
6After stopping the hybrid sys-
tem and waiting for 5 minutes
or more, start the hybrid sys-
tem again and check for the
multi-information display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be
driven normally.
However, if the message appears
again frequently, contact your Toyota dealer.
A
B
C
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.
●After the hybrid system has
been turned off , check that the
“READY” indicator is off.
When the hybrid system is oper-
ating, the gasoline engine may
automatically start, or the cool-
ing fan may suddenly operate
even if the gasoline engine
stops. Do not touch or approach
rotating parts such as the fan,
which may lead to fingers or
clothing (especially a tie, a scarf
or a muffler) getting caught,
resulting in serious injury.
●Do not loosen the coolant reser-
voir cap while the hybrid system
and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding engine/power
control unit coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.

5127-2. 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.337)
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

567What to do if... (Troubleshooting)
porary way. (P.503)
 Is the 12-volt battery dis-
charged? ( P.504)
 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.243)
 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.204)
 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.238)
 The seat belt reminder light is
flashingAre the driver and the passengers
wearing the seat belts? ( 
P.471)
The parking brake indicator is
on
Is the parking br ake released?
( 
P.246)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.464, 475)
 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
multi-information display.
( P.475)
 When a warning light turns on
or a warning message is dis-
played, refer to P.464, 475.
The shift lever cannot be
shifted from P even if you
depress the brake pedal
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
A warning light turns on
or a warning message is
displayed

572Alphabetical Index
Memory recall function ......... 181
Power easy access system .. 179
Driving support system informa- tion display ........................... 110
Dynamic radar cruise control with full-speed rangeFunction ............................... 291
Warning message ................ 475
E
ECB (Electronically Controlled Brake System) ...................... 335
Eco drive mode ...................... 334
EDR (Event data recorder)......... 8
E-Four (Electronic On-Demand AWD system) ........................ 336
Elapsed time ........................... 111
Electric motor Location.................................. 79
Specification ......................... 518
Electric Power Steering (EPS) Function ............................... 336
Warning light ........................ 466
Electronically Controlled Brake System (ECB) ....................... 335
Electronic key Battery-saving function......... 166
If the electronic key does not operate properly ................. 502
Replacing the battery ........... 444
Emergency, in case of If a warning buzzer sounds .. 464
If a warning light turns on ..... 464
If a warning message is dis-played................................. 475
If the 12-volt battery is dis- charged .............................. 504
If the electronic key does not operate properly ................. 502
If the fuel filler door cannot be opened ............................... 501
If the hybrid sy stem will not start ...........................................499
If the vehicle is submerged or water on the road is rising ..458
If you have a flat tire .....480, 490
If you lose your keys.............500
If you think something is wrong ...........................................463
If your vehicle becomes stuck ...........................................512
If your vehicle has to be stopped in an emergency .................457
If your vehicle needs to be towed ...........................................460
If your vehicle ove rheats ......509
Emergency flashers ...............456
Energy monitor .......................122
Engine Compartment........................413
Hood .....................................410
Identification number ............518
Engine coolant Capacity ...............................520
Checking ..............................416
Preparing and checking before winter ..................................344
Warning light ........................465
Engine coolant temperature gauge ...............................97, 101
Engine oil Capacity ...............................519
Checking ..............................413
Preparing and checking before winter ..................................344
Warning light ........................465
Engine oil maintenance data .415
Enhanced Vehicle Stability Con- trol (Enhanced VSC ) .............336
Enhanced VSC (Enhanced Vehi- cle Stability Control).............336
EPS (Electric Po wer Steering)
Function................................336
Warning light ........................466

574Alphabetical 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 ............ 448
Hill-start assist control .......... 336
Hood ........................................ 410
Hooks Cargo hooks ......................... 372
Coat hooks ........................... 388
Grocery bag hooks ............... 387
Retaining hooks (floor mat) .... 32
Horn ......................................... 187
Hybrid battery (tr action battery)
Location.................................. 83
Specification ......................... 519
Hybrid battery (traction battery) air intake vents ............... 85, 440
Hybrid battery (traction battery) air intake vents and filters ... 440
Hybrid battery air vent ............. 85
Hybrid system .......................... 79 ACC...................................... 237
Acoustic Vehicle Alerting System............................................. 81
Emergency shut off system .... 86
Energy monitor/consumption screen ................................ 122
EV drive mode...................... 239
High voltage components....... 83
How to start the hybrid system ........................................... 234
Hybrid battery (traction battery) air vents.............................. 440
Hybrid Electric Vehicle driving tips...................................... 342 Hybrid System Indicator .97, 101
Hybrid system precautions .....83
If the hybrid sys
tem will not start
...........................................499
If your vehicle has to be stopped in an emergency .................457
Ignition switch (power switch) ...........................................234
Overheating ..........................509
Power (ignition) switch .........234
Regenerative braking .............80
Starting the hybrid system ....234
Hybrid System I ndicator .98, 102,
121
Hybrid transmissio n ...............241
S mode .................................244
I
I/M test .....................................406
Identification Engine ..................................518
Vehicle..................................517
Ignition switch (power switch) ...............................................234Auto power off fun ction.........238
Changing the power switch modes.................................237
If your vehicle has to be stopped in an emergency .................457
Starting the hybrid system ....234
Illuminated entry system .......365
Immobilizer system ..................88
Indicators ..................................94
Initialization Items to initialize ...................551
Maintenance .........................403
Oil maintenance ...................415
Tire pressure warning system...........................................427
Inside rear view m irror ...187, 189
Instrument panel light control99, 103

Alphabetical Index579
Inside rear view mirror.......... 188
Intuitive parking assist .......... 312
LTA (Lane Tracing Assist).... 278
Parking Support Brake function (rear-crossing vehicles) ...... 304
Parking Support Brake function (static objects) .................... 312
Rain-sensing windshield wipers ........................................... 259
RCTA (Rear Cross Traffic Alert) ........................................... 304
Toyota Safety Sense ............ 265
Service plug .............................. 83
Service reminder message .... 403
Shift lever ................................ 241 If the shift lever cannot be shifted from P................................. 243
Shift lock system .................... 243
Shopping bag hooks .............. 387
Side airbags .............................. 41
Side auxiliary box ................... 372
Side marker lights Light switch .......................... 251
Replacing light bulbs ............ 448
Side mirrors ............................ 199 Adjustment ........................... 199
BSM (Blind Spot Monitor)..... 303
Folding ................................. 200
Heaters................................. 350
Linked mirror function when reversing ............................ 200
Side turn signal lights Replacing light bulbs ............ 448
Turn signal lever................... 245
Side windows ...... ................... 202
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 ...................165 Antenna location...................165
Entry functions......132, 138, 151
Starting the hybrid system ....234
Warning message . ...............475
Snow tires ...............................344
Spare tire Storage location ...................490
Spark plug ...............................520
Specifications .........................516
Speedometer .....................97, 101
Sport mode..............................334
Steering wheel Adjustment ...........................186
Heated steering wheel..........361
Meter control switches..........105
Stop lights Replacing light bulbs ............448
Storage feature .. .....................366
Storage precaution s ...............367
Stuck If the vehicle becomes stuck 512
Suggestion functi on ...............117
Sunshade ........................205, 385
Sun visors ...............................374
Switches “ODO TRIP” switch .........99, 103
“SOS” button ..........................75
Automatic High Beam switch 253
Brake hold switch .................249
BSM (Blind Spot M onitor) .....303
Digital Rear-view Mirror control switches..............................189
Door lock switch ...................135
Driving mode select switch ...334
Driving position memory switches..............................179
Dynamic radar cruise control with full-speed range ..........292
Emergency flashers switch...456