overheating TOYOTA SIENNA 2018 Owners Manual (in English)

SIENNA_OM_OM08019U_(U)
912. Instrument cluster
2
Instrument cluster
The brightness of the meter panel lights can be adjusted.
Pressing the butto n will adjust the
brightness of the meter panel
lights.
The brightness level of the meters
when the surroundings are bright
(day mode) and dark (night mode)
can be adjusted individually. How-
ever, when in day mode, adjusting
the brightness level will also
change the brightness level of
night mode.
■ Outside temperature display
●In the following situations, the correct outside temperature ma y not be dis-
played, or the display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 k m/h])
• When the outside temperature has changed suddenly (at the entr ance/
exit of a garage, tunnel, etc.)
● The temperature range that can be displayed is from -40°F (-40° C) to 122°F
(50°C).
When the outside temperature drops below 37°F (3°C), the Low ou tside
temperature indicator will be displayed on the multi-informatio n display.
( P. 86)
● When “--” or “E” is displayed, the system may be malfunctioning. Take your
vehicle to your Toyota dealer.
Meter panel light control
NOTICE
■To prevent damage to the engine and its components
● Do not let the indicator needle of the tachometer enter the red zone, which
indicates the maximum engine speed.
● The engine may be overheating if the engine coolant temperature gauge is
in the red zone (H). In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. ( P. 509)

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SIENNA_OM_OM08019U_(U)
4-1. Before driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is parked
● Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit acci dentally when
luggage is loaded or the seat is adjusted, causing a fire.
● Do not attach adhesive discs to the windshield or windows. Do n ot place
containers such as air fresheners on the instrument panel or da shboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehi-
cle.
● Do not leave a door or window open if the curved glass is coate d with a
metallized film such as a silver-colored one. Reflected sunligh t may cause
the glass to act as a lens, causing a fire.
● Always apply the parking brake, shift the shift lever to P, stop the engine
and lock the vehicle.
Do not leave the vehicle unattended while the engine is running .
● If the vehicle is parked with the shift lever in P but the park ing brake is not
set, the vehicle may start to move, possibly leading to an acci dent.
● Do not touch the exhaust pipe while the engine is running or immediately
after turning the engine off.
Doing so may cause burns.
■ When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift
lever or depress the accelerator pedal, this could cause an acc ident or fire
due to engine overheating. Additionally, if the vehicle is park ed in a poorly
ventilated area, exhaust gases may collect and enter the vehicl e, leading to
death or a serious health hazard.

SIENNA_OM_OM08019U_(U)
2194-1. Before driving
4
Driving
●Due to the added load of the trailer, your vehicle’s engine may over-
heat on hot days (at temperatures over 85°F [30°C]) when drivin g
up a long or steep grade. If the Engine coolant temperature gau ge
overheating, immediately turn off the air conditioning (if in use), pull
your vehicle off the road an d stop in a safe spot. (P. 509)
● Always place wheel blocks under both the vehicle’s and the trai ler’s
wheels when parking. Apply the parking brake firmly, and put th e
transmission in P. Avoid parking on a slope, but if unavoidable , do
so only after perform ing the following:
Apply the brakes and keep them applied.
Have someone place wheel blocks under both the vehicle’s and
trailer’s wheels.
When the wheel blocks are in pl ace, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into P and turn off the engine.
● When restarting afte r parking on a slope:
With the transmission in P, start the engine. Be sure to keep t he
brake pedal pressed.
Shift into a forward gear. If reversing, shift into R.
Release the parking brake and brake pedal, and slowly pull or
back away from the wheel bloc ks. Stop and apply the brakes.
Have someone retrieve the blocks.
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SIENNA_OM_OM08019U_(U)
2314-2. Driving procedures
4
Driving
■Steering lock
After turning the engine switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function.
Operating the engine switch again automatically cancels the ste ering lock.
■ When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the engine is turned on and off repeatedly in a short period of time.
In this case, refrain from operating the engine. After about 10 seconds, the
steering lock motor will resume functioning.
■ When the engine switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Toy-
ota dealer immediately.
■ If the electronic key battery is depleted
P. 436
■ Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine swi tch mode may
not change or the engine may not start.
● If attempting to restart the engine immediately after turning t he engine
switch off, the engine may not start in some cases. After turni ng the engine
switch off, please wait a few seconds before restarting the eng ine.
The green indicator light on the engine
switch will flash and “Steering Lock
Active” will be shown on the multi-infor-
mation display. Press the engine switch
while turning the steering wheel left and
right.

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SIENNA_OM_OM08019U_(U)
4-2. Driving procedures
Parking brake
To set the parking brake, fully
depress the parking brake pedal
with your left foot while depress-
ing the brake pedal with your right
foot.
(Depressing the pedal again
releases the parking brake.)
■Parking the vehicle
P. 194
■ Usage in winter time
P. 327
Operating instructions
U.S.A.Canada
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to bra ke components
overheating, which may affect braking performance and increase brake
wear.

SIENNA_OM_OM08019U_(U)
3254-5. Using the driving support systems
4
Driving
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the s ystem from
overheating when there is frequent steering input over an exten ded period of
time. The steering wheel may feel heavy as a result. Should thi s occur, refrain
from excessive steering input or stop the vehicle and turn the engine off. The
EPS system should return to normal within 10 minutes.
■ Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assi st control will
operate:
● The shift lever is in a position other than P or N (when starting off forward/
backward on an upward incline).
● The vehicle is stopped.
● The accelerator pedal is not depressed.
● The parking brake is not applied.
■ Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
● The shift lever is shifted to P or N.
● The accelerator pedal is depressed.
● The parking brake is applied.
● Approximately 2 seconds elapse after the brake pedal is release d.
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (suc h as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or s lick roads.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, espe cially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces

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SIENNA_OM_OM08019U_(U)
7-2. Steps to take in an emergency
7
When trouble arises
If your vehicle overheats
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and
radiator core (radiat or) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact your
Toyota dealer.
The following may indicate that your vehicle is overheating.
● The needle of the engine c oolant temperature gauge (P. 90)
enters the red zone or a loss of engine power is experienced. ( For
example, the vehicle s peed does not increase.)
● “Engine Coolant Temp is High” is shown on the multi-information
display.
● Steam is coming from under the hood.
Correction procedures
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572Alphabetical index
SIENNA_OM_OM08019U_(U)
Child safety ................................ 57Airbag precautions .................. 41
Back door precautions .......... 139
Battery precautions ........ 418,508
Child restraint system ............. 58
How your child should wear
the seat belt .......................... 34
Installing child restraints ......... 62
Moon roof precautions .......... 191
Power window lock switch .... 184
Power window precautions ... 186
Removed key battery
precautions ......................... 438
Seat belt extender
precautions ........................... 37
Seat belt precautions .............. 36
Seat heater precautions........ 344
Sliding door child-protectors ................... 125
Child-protectors....................... 125
Cleaning
Aluminum wheels.................. 393
Exterior ................................. 392
Interior................................... 395
Seat belts .............................. 396
Clock
*
Compass .................................. 381
Condenser ................................ 415
Console box ............................. 352
Conversation mirror ................ 364
Cooling system ........................ 413 Engine overheating ............... 509
Cruise control
Dynamic radar cruise control................................. 289
Warning message ................. 299
Cup holders.............................. 354
Curtain shield airbags ............... 38
Customizable features ............ 540 Daytime running light
system.................................... 244
Defogger Outside rear view mirrors ..... 336
Rear window ......................... 336
Windshield ............................ 336
Differential Rear differential .................... 521
Dimension ................................ 516
Dinghy towing.......................... 224
Display Drive information .................... 94
Dynamic radar cruise control ................................ 289
Fuel consumption information ........................... 99
LDA
(Lane Departure Alert) ....... 283
Multi-information display ......... 92
Warning messages ............... 481
Do-it-yourself maintenance .... 405
Door courtesy lights Door courtesy lights .............. 347
Wattage ................................ 525
Doors Automatic door locking and unlocking system......... 115
Back door ............................. 133
Door lock .............. 110, 121, 133
Front doors ........................... 110
Outside rear view mirrors ..... 181
Sliding door child-protectors................... 125
Sliding doors ......................... 121
D

573Alphabetical index
SIENNA_OM_OM08019U_(U)
DrivingBreak-in tips .......................... 195
Correct posture ....................... 28
Procedures ........................... 194
Winter driving tips ................. 327
Driving position memory ........ 169 Driving position memory ....... 170
Memory recall function.......... 171
Power easy access system ......... ....................... 169
Dynamic radar cruise control
Function ................................ 289
DVD player
*
Eco Driving Indicator ................ 88
EDR (Event data recorder) ........ 10
Electric power steering (EPS)....................................... 322 Function ................................ 322
Warning light ......................... 472
Electronic key Battery-saving function ......... 145
If your electronic key does
not operate properly ........... 503
Replacing the battery ............ 436
Emergency flashers ................ 462 Emergency, in case of
If a warning buzzer
sounds................................ 471
If a warning light turns on ..... 471
If a warning message is displayed ............................ 481
If the battery is discharged ... 505
If the electronic key does not operate properly ........... 503
If the engine will not start ...... 501
If you have a flat tire .... 485, 499
If you lose your keys ............. 107
If you think something is wrong ................................. 469
If your vehicle becomes stuck ................................... 512
If your vehicle has to be
stopped in an emergency ... 463
If your vehicle needs to be towed.................................. 465
If your vehicle overheats....... 509
Engine “ACC” position ...................... 225
Accessory mode ................... 229
Compartment ........................ 410
Engine switch ............... 225, 228
Hood ..................................... 407
How to start the
engine ........................ 225, 228
Identification number ............ 517
If the engine will not start ...... 501
Ignition switch (engine switch) ........... 225, 228
Overheating .......................... 509
E
*: Refer to “NAVIGATION AND MULTIMEDIA
SYSTEM OWNER’S MANUAL”

578Alphabetical index
SIENNA_OM_OM08019U_(U)
Navigation system*Noise from under vehicle............ 8
Odometer.................................... 90
OilEngine oil .............................. 518
Opener
Back door.............................. 134
Fuel filler door ....................... 258
Hood ..................................... 407
Outer foot lights Outer foot lights .................... 347
Replacing light bulbs............. 456
Outside rear view mirrors Adjusting and folding ............ 181
BSM (Blind spot monitor) ...... 302
Driving position memory ....... 169
Outside rear view mirror defoggers ........................... 336
Outside temperature display ...................................... 90
Overhead console ................... 358
Overheating, Engine................ 509 Panoramic view monitor
*
Parking assist sensors
(intuitive parking assist)....... 314
Parking brake........................... 240 Operation .............................. 240
Parking brake
engaged warning
buzzer ................................ 471
Parking lights Light switch ........................... 241
Replacing light bulbs .... 450, 456
Wattage ................................ 525
PCS (Pre-Collision System).... 267 Enabling/disabling the
system .......... ...................... 270
Function ................................ 267
Warning light......................... 472
Personal lights Switch ................................... 348
Wattage ................................ 525
Power back door ..................... 133
Power outlets ........................... 365
Power windows Jam protection function ........ 185
Operation .............................. 184
Window lock switch .............. 184
Pre-collision system (PCS)..... 267
Enabling/disabling the system .......... ...................... 270
Function ................................ 267
Warning light......................... 472
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