engine overheat TOYOTA HIGHLANDER HYBRID 2019 Owners Manual (in English)

TABLE OF CONTENTS6
HIGHLANDER_HV_U7-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 490
Cleaning and protecting the vehicle interior ........... 494
7-2. Maintenance Maintenance requirements ................... 497
General maintenance ........ 500
Emission inspection and maintenance (I/M)
programs ......................... 503
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 504
Hood.................................. 506
Positioning a floor jack ...... 508
Engine compartment ......... 509
12-volt battery ................... 517
Tires .................................. 522
Tire inflation pressure........ 532
Wheels .............................. 535
Air conditioning filter .......... 537
Electronic key battery ........ 539
Checking and replacing fuses ................ 541
Light bulbs ......................... 545 8-1. Essential information
Emergency flashers ........... 560
If your vehicle has to be stopped in an
emergency....................... 561
8-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 562
If you think something is wrong ........................... 566
If a warning light turns on or a warning buzzer
sounds ............................. 567
If a warning message is displayed...................... 576
If you have a flat tire .......... 596
If the hybrid system will not start ..................... 620
If the electronic key does not operate
properly ........................... 622
If the 12-volt battery is discharged ................... 625
If your vehicle overheats......................... 630
If the vehicle becomes stuck ................ 634
7Maintenance and care8When trouble arises

17Pictorial index
HIGHLANDER_HV_UFuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 262
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 262
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 641
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 522
Tire size/inflation pressure . . . . . . . . . . . . . . . . . .
. . . . . . . . . . P. 646
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 344
Checking/rotation/tire pressure warning system . . . . . . . . . . . P. 522
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 596
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 506
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 506
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 642
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 630
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 578
Headlights/daytime running lights
*. . . . . . . . . . . . . . . . . . . P. 247
Daytime running lights
*/parking lights*. . . . . . . . . . . . . . . P. 247
Front fog lights
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 255
Front turn signal lig hts/parking lights
*. . . . . . . . . . . . . . . . P. 245
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 247
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 336
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 247
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 239
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 247
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 245
6
7
8
Light bulbs of the exterior lights for driving
(Replacing method: P. 545, Watts: P. 649)
*: If equipped
9
10
11
12
13
14
15
16
17

1122. Instrument cluster
HIGHLANDER_HV_U
NOTICE
■To prevent damage to the engine and its components
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. 630)

2024-1. Before driving
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WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
● Use engine braking (downshift) to maintain a safe speed when driving
down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. ( P. 239)
● Do not adjust the positions of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.
● Do not drive in excess of the speed limit. Even if the legal sp eed limit per-
mits it, do not drive over 85 mph (140 km/h) unless your vehicl e has high-
speed capability tires. Driving over 85 mph (140 km/h) may resu lt in tire
failure, loss of control and possible injury. Be sure to consult a tire dealer
to determine whether the tires on your vehicle are high-speed c apability
tires or not before driving at such speeds.
■ When driving on slippery road surfaces
● Sudden braking, acceleration and steering may cause tire slippa ge and
reduce your ability to control the vehicle.
● Sudden acceleration, engine braking due to shifting, or changes in engine
speed could cause the vehicle to skid.
● After driving through a puddle, lightly depress the brake pedal to make
sure that the brakes are functioning properly. Wet brake pads m ay prevent
the brakes from functioning properly. If the brakes on only one side are wet
and not functioning properly, steering control may be affected.

2044-1. Before driving
HIGHLANDER_HV_U
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If you hear a squealing or scrap ing noise (brake pad wear limit indica-
tors)
Have the brake pads checked and replaced by your Toyota dealer as soon
as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
● Do not depress the accelerator pedal unnecessarily.
If the shift lever is in any position other than P or N, the vehicle may accel-
erate suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indic ator is
illuminated, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent ac cidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped m ay cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.

2244-1. Before driving
HIGHLANDER_HV_U
●Note that when making a turn, the trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by mak ing
a wider than normal turning radius.
● Slow down before making a turn, in cross winds, on wet or slipp ery
surfaces, etc.
Increasing vehicle speed can destabilize the trailer.
● Take care when passing other vehicles. Passing requires consider-
able distance. After passing a vehicle, do not forget the lengt h of
your trailer, and be sure you have plenty of room before changi ng
lanes.
● To maintain engine braking efficiency and charging system perfo r-
mance when using engine braking, do not put the transmission in
D. If in the S mode, the transm ission shift range position must be in
4 or lower.
● Instability happens more frequently when descending steep or lo ng
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
● Avoid holding the brake pedal down too long or applying the bra kes
too frequently. This could cause the brakes to overheat and result in
reduced braking efficiency.
● 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. 630)

3394-5. Using the driving support systems
4
Driving
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ECB operation sound
ECB operating sound may be heard in the following cases, but it does not
indicate that a malfunction has occurred.
● Operating sound heard from the engine compartment when the brak e pedal
is operated.
● Motor sound of the brake system heard from the front part of th e vehicle
when the driver’s door is opened.
● Operating sound heard from the engine compartment when one or t wo min-
utes passed after the stop of the hybrid system.
■ EPS operating 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:
● When the power switch is turned 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 hybrid system
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

6308-2. Steps to take in an emergency
HIGHLANDER_HV_U
●The needle of the engine coolant temperature gauge ( P. 1 0 9 )
enters the red zone or a loss of hybrid system power is experi-
enced. (For example, the vehicle speed does not increase.)
● “Hybrid System Overheated Reduced Output Power” is shown on
the multi-inform ation display.
● Steam comes out f rom under the hood.
■If the needle of the engine cool ant temperature gauge enters
the red zone
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) for any
leaks. Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

703Alphabetical index
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ECB (Electronically Controlled
Brake System) ....................... 335
Eco drive mode ........................ 240
EDR (Event data recorder) ........ 11
Electric motor (traction motor) ....................... 87
Electric Power Steering
(EPS)....................................... 336 Function ................................ 336
Warning light ......................... 568
Electronic key .......................... 126 Battery-saving function ............................... 154
If the electronic key does not operate properly ................. 622
Replacing the battery ............ 539
Emergency flashers ................ 560 Emergency, in case of
If a warning buzzer
sounds................................ 567
If a warning light turns on ..... 567
If a warning message is displayed ............................ 576
If the 12-volt battery is discharged.......................... 625
If the electronic key does not operate properly ........... 622
If the hybrid system
will not start ........................ 620
If you have a flat tire ............. 596
If you think something is wrong ................................. 566
If your vehicle becomes stuck ................................... 634
If your vehicle has to be stopped in an emergency ... 561
If your vehicle needs to be
towed.................................. 562
If your vehicle overheats....... 630
Energy monitor ........................ 119
Engine ...................................... 640
ACCESSORY mode ............. 232
Compartment ........................ 509
Hood ..................................... 506
How to start the hybrid system .......... ...................... 231
Identification number ............ 640
If the hybrid system
will not start ........................ 620
Ignition switch
(power switch) .................... 231
Overheating .......................... 630
Power switch ........................ 231
E

706Alphabetical index
HIGHLANDER_HV_U
Hybrid system ............................ 87Emergency shut off system .... 92
Energy monitor/
consumption screen ........... 119
EV drive mode ...................... 237
High voltage components ....... 91
Hybrid System Indicator........ 111
Hybrid system precautions ..... 91
Hybrid vehicle driving tips ..... 341
If the hybrid system will not start ........................ 620
Overheating .......................... 630
Power (ignition) switch .......... 231
Starting the hybrid system .... 231
Vehicle proximity notification system ......... ......................... 90
Hybrid System Indicator ......... 111
Hybrid transmission ................ 239
If the shift lever cannot be shifted from P ..................... 243
S mode ................................. 241 I/M test ...................................... 503
Identification ............................ 639
Engine .................................. 640
Vehicle .................................. 639
Ignition switch
(power switch) ....................... 231
Illuminated entry system ........ 454
Immobilizer system ................... 97
Indicators ................................. 107
Initialization Maintenance ......................... 498
Moon roof ............................. 189
Panoramic moon roof ........... 193
Power back door................... 142
Power windows..................... 185
Tire pressure warning system .... .............. 525
Inside rear view mirror ............ 179
Interior lights ........................... 453 Switch ................................... 454
Wattage ................................ 649
Intuitive parking assist
*
Jack Positioning the jack............... 508
Vehicle-equipped jack .......... 597
Jack handle .............................. 597
Jam protection function Moon roof ............................. 188
Panoramic moon roof ........... 193
Power back door................... 141
Power window ...................... 184
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