overheating TOYOTA HIGHLANDER 2018 Owners Manual (in English)

942. Instrument cluster
HIGHLANDER_U (OM0E031U)
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. 644)

1924-1. Before driving
HIGHLANDER_U (OM0E031U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is parked
● Do not leave glasses, cigarette lighters, spray cans, or soft d rink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may le ad to a
fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray ov er the
interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
● 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.

2124-1. Before driving
HIGHLANDER_U (OM0E031U)
●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 driving
up a long or steep grade. If the engine coolant temperature gau ge
indicates overheating, immediately turn off the air conditionin g (if in
use), pull your vehicle off the road and stop in a safe spot.
(  P. 644)
● 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 depressed.
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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2244-2. Driving procedures
HIGHLANDER_U (OM0E031U)■
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 steering lock.
■ When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor
may be suspended if the engine is turned on and off repeatedly in a short
period of time. In this case, refrain from operating the engine switch. After
about 10 seconds, the steering lock motor will resume functioni ng.
■ When “Check SMART Key System” is displayed on the multi-informa tion
display
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■ If the electronic key battery is depleted
P. 549
■ 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.
■ If the smart key system has been d eactivated in a customized setting
P. 635 “Steering Lock active” will be displayed on
the multi-information display.
Check that the shift lever is set in P. Press
the engine switch while turning the steer-
ing wheel left and right.

2344-2. Driving procedures
HIGHLANDER_U (OM0E031U)
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.)
*1: For U.S.A.
*2: For Canada
■Parking the vehicle
P. 186
■ Parking brake engaged warning buzzer
P. 594
■ Usage in winter time
P. 339
Parking brake
Operating instructions
*1*2
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.

3354-5. Using the driving support systems
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Driving
HIGHLANDER_U (OM0E031U)■
EPS operation sound
When the steering wheel is operated, a motor sound (whirring so und) may be
heard. This does not indicate a malfunction.
■ Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
● Vehicles without a smart key system: When the engine switch is turned to
the “LOCK” position
Vehicles with a smart key system: When the engine switch is tur ned off
● If only the TRAC system is turned off, the TRAC will turn on wh en vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-e nabling will
not occur when vehicle speed increases.
■ 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.
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 on the road
● When driving over roads with potholes or uneven surfaces

6448-2. Steps to take in an emergency
HIGHLANDER_U (OM0E031U)
●The needle of the engine coolant temperature gauge ( P. 9 2 )
enters the red zone or a loss of engine power is experienced. ( For
example, the vehicle speed does not increase.)
● Steam comes out f rom under the hood.
Stop the vehicle in a safe place and turn off the air condition ing 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 (radia-
tor) for any leaks. Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact your
Toyota dealer.
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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717Alphabetical index
HIGHLANDER_U (OM0E031U)
Child-protectors....................... 120
Cleaning ........................... 500, 504Aluminum wheels.................. 501
Exterior ................................. 500
Interior................................... 504
Seat belts .............................. 505
Clock ......................................... 473
Coat hooks ............................... 481
Compass .................................. 495
Condenser ................................ 525
Console box ............................. 461
Conversation mirror ................ 473
Cooling system ........................ 524 Engine overheating ............... 644
Cruise control Dynamic radar cruise control................................. 285
Cup holders.............................. 463
Curtain shield airbags ............... 41
Customizable features ............ 680 DAC (Downhill Assist
Control system).................... 337
Daytime running light system.................................... 236
Deck board ............................... 468
Defogger
Outside rear view mirrors ........................ 438, 444
Rear window ................. 438, 444
Windshield .................... 437, 444
Dimensions .............................. 650
Dinghy towing.......................... 217
Display Drive information .................... 97
Dynamic radar cruise
control ................................ 285
LDA (Lane Departure Alert
with steering control) .......... 279
Multi-information display .................................. 95
Warning message ................ 591
Do-it-yourself maintenance .... 514
Door lock Doors .................................... 115
Smart key system ................. 115
Wireless remote control ........ 116D

719Alphabetical index
HIGHLANDER_U (OM0E031U)
Engine....................................... 653“ACC” position ...................... 218
ACCESSORY mode ............. 222
Compartment ........................ 519
Engine switch................ 218, 221
Hood ..................................... 516
How to start the engine......................... 218, 221
Identification number ............ 652
If the engine will not start ...... 633
Ignition switch (engine switch) ........... 218, 221
Overheating .......................... 644
Engine coolant ......................... 524
Capacity ................................ 656
Checking ............................... 524
Preparing and checking before winter....................... 339
Engine coolant temperature gauge........................................ 92
Engine immobilizer system ...... 80
Engine oil ................................. 521 Capacity ................................ 654
Checking ............................... 521
Oil pressure warning
message ............................. 598
Preparing and checking
before winter....................... 339
Engine switch .................. 218, 221
Enhanced VSC ......................... 331 Entune Audio ........................... 351
Audio input............................ 355
AUX port/
USB port............................. 355
CD player.............................. 369
iPod ...................................... 375
MP3/WMA disc ..................... 369
Optimal use .......................... 366
Portable music player ........... 383
Radio .................................... 367
Steering wheel audio
switch ................................. 354
USB memory ........................ 379
Entune Audio Plus
*
Entune Premium Audio*
EPS (Electric Power Steering) ..... 332
Function ................................ 332
Warning light......................... 582
Event data recorder (EDR)........ 10
*: Refer to “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”

724Alphabetical index
HIGHLANDER_U (OM0E031U)
MP3 disc ................................... 369
Multi-information display .......... 95Audio system-linked. ............... 95
Drive information..................... 97
Dynamic radar cruise control................................. 285
LDA (Lane Departure Alert with steering control) .......... 279
Navigation system-linked ...... ................. 95
Settings display....................... 99
Switching the display .............. 96
Warning message ................. 591
Noise from under vehicle............ 8
Odometer.................................... 92
Oil Differential oil ........................ 658
Engine oil .............................. 654
Opener
Back door.............................. 124
Fuel filler door ....................... 252
Glass hatch ........................... 136
Hood ..................................... 516
Outer foot lights....................... 458
Outside rear view mirrors ....... 170 Adjusting and folding ............ 170
BSM (Blind spot monitor) ...... 316
Mirror position memory ......... 158
Outside rear view mirror
defoggers ................... 438, 444
Outside temperature display .................................... 474
Overheating, Engine................ 644 Panoramic moon roof ............. 180
Jam protection function ........ 182
Operation .............................. 180
Panoramic view monitor*
Parking assist sensors (intuitive parking
assist)
*
Parking brake........................... 234 Operation .............................. 234
Parking brake engaged warning buzzer ................... 594
Parking brake engaged warning light ....................... 582
Parking brake engaged
warning message ............... 594
Parking lights........................... 235 Light switch ........................... 235
Replacing light bulbs ............ 556
Wattage ................................ 663
PCS
(Pre-Collision System).......... 261 Pre-collision brake assist ...... 262
Pre-collision braking ............. 262
Pre-collision warning ............ 262
Warning light......................... 583
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