engine coolant TOYOTA HIGHLANDER HYBRID 2023 Owner's Manual

4877-2. Steps to take in an emergency
7
When trouble arises
However, if the message appears
again frequently, contact your Toy-
ota dealer.
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 radiator cap
and the coolant reservoir caps
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.
■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.

4938-1. Specifications
8
Vehicle specifications
Outside temperature
SAE 0W-16 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-16 is not available,
SAE 0W-20 oil may be used.
However, it must be replaced
with SAE 0W-16 at the next oil
change.
Oil viscosity (0W-16 is explained
here as an example):
• The 0W in 0W-16 indicates the characteristic of the oil
which allows cold startability.
Oils with a lower value before the W allow for easier starting
of the engine in cold weather.
• The 16 in 0W-16 indicates the viscosity characteristic of the
oil when the oil is at high tem-
perature. An oil with a higher
viscosity (one with a higher
value) may be better suited if
the vehicle is operated at high
speeds, or under extreme
load conditions.
How to read oil container label:
API registered mark is added to
some oil containers to help you
select the oil you should use.
Cooling system
Capacity
Gasoline
engine10.5 qt. (9.9 L , 8.7 Imp. qt.)
Power con-
trol unit2.0 qt. (1.9 L, 1.7 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality et hylene glycol-based
non-silicate, non -amine, non-nitrite, and
non-borate coolant with long-life hybrid organic
acid technology
Do not use pla in water alone.

5048-1. Specifications
Grade C corresponds to a level of
performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law. Warning: The temperature grades
of a tire assume tha
t it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire infl ation pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km
under that condition
Maximum inflation pressure
The maximum cold inf lated pressure to
which a tire may be inflated, shown on the
sidewall of the tire
Recommended inflation pres-
sureCold tire inflation pressure recommended
by a manufacturer
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
hybrid transmission, power steering,
power brakes, power windows, power
seats, radio and heater, to the extent that
these items are available as fac-
tory-installed equipment (whether installed
or not)
Curb weight
The weight of a motor vehicle with stan-
dard equipment, including the maximum
capacity of fuel, oil and coolant, and if so
equipped, air conditioning and additional
weight optional engine

544Alphabetical Index
Electric Power Steering (EPS)............................................... 312Warning light ........................ 448
Electronic key ......................... 124 Battery-saving function......... 143
If the electronic key does not operate properly ................. 477
Replacing the battery ........... 423
Electronic roof sunshade Jam protection function ........ 180
Operation ............................. 179
Electronically Controlled Brake System (ECB) ....................... 311
Emergency flashers ............... 438
Emergency, in case of If a warning buzzer sounds .. 445
If a warning light turns on ..... 445
If a warning message is dis-played................................. 456
If the 12-volt battery is dis- charged .............................. 479
If the electronic key does not operate properly ................. 477
If the fuel filler door cannot be opened ............................... 476
If the hybrid sy stem will not start
........................................... 474
If the vehicle is submerged or water on the road is rising .. 439
If you have a flat tire ............. 461
If you lose your keys ............ 475
If you think something is wrong ........................................... 443
If your vehicle becomes stuck ........................................... 488
If your vehicle has to be stopped in an emergency................. 438
If your vehicle needs to be towed ........................................... 441
If your vehicle overheats ...... 484
Energy monitor ....................... 119 Engine
ACCESSORY mode . ............209
Compartment........................396
Engine switch .......................207
Hood .....................................394
How to start the hybrid system ...........................................207
Identification number ............491
If the hybrid sys tem will not start
...........................................474
If your vehicle has to be stopped in an emergency .................438
Ignition switch (power switch) ...........................................207
Overheating ..........................484
Power switch ........................207
Tachometer.......................87, 91
Engine coolant Capacity ...............................493
Checking ..............................399
Preparing and checking before winter ..................................320
Engine coolant temperature gauge .................................87, 91
Engine oil Capacity ...............................492
Checking ..............................396
Preparing and checking before winter ..................................320
Warning light.........................446
Engine oil maintenance data .398
Engine switch (power switch)207 If your vehicle has to be stopped in an emergency .................438
EPS (Electric Po wer Steering)
...............................................312 Warning light.........................448
EV drive mode......................... 211
EV indicator...............................70
Event data recorder (EDR) .........7

549Alphabetical Index
Parking lightsLight switch .......................... 223
Replacing light bulbs ............ 428
Parking Support Brake function (for rear-crossing vehicles) . 307Function ............................... 307
Parking Support Brake function (static objects) ...................... 304Function ............................... 304
PCS (Pre-Collision System) Function ............................... 242
PCS OFF switch................... 245
Warning light ........................ 451
Personal lights ....................... 343
PKSB (Parking Support Brake) ............................................... 297Warning message ................ 303
Power control unit .................... 73
Power control unit coolant Capacity ............................... 493
Checking .............................. 399
Preparing and c hecking before
winter.................................. 320
Power outlets .................. 363, 364
Power steering (Electric power steering system)................... 312Warning light ........................ 448
Power switch .......................... 207 Auto power off function ........ 210
Changing the power switch modes ................................ 209
Power switch ( engine switch)
If your vehicle has to be stopped in an emergency................. 438
Power windows Door lock linked window opera-tion ..................................... 174
Jam protection function ........ 173
Operation ............................. 173
Window lock switch .............. 175
Pre-Collision System (PCS) Function ............................... 242 PCS OFF switch ...................245
Warning light.........................451
Predictive deceleration support .................................................72
Predictive SOC control ............72
R
Radar cruise control (dynamic radar cruise control with
full-speed range)...................263
Radiator ...................................400
RCTA Function................................291
Warning message.................292
RCTA function .........................292
Rear automatic air conditioning system ...................................337
Rear Cross Traffic Alert (RCTA) ...............................................291
Rear door sunshades .............369
Rear seats ...............................148 Head restraints .....................156
Seat heaters ....... ..................341
Rear side marker lights Light switch...........................223
Replacing light bulbs ............428
Rear turn signal lights Replacing light bulbs ............428
Turn signal lever ...................216
Rear view mirror Digital Rearview Mirror .........161
Inside rear view mirror ..........160
Outside rear view mirrors .....171
Rear window defogger ...........330
Refueling Capacity ...............................491
Fuel types .............................491
If the fuel filler door cannot be opened ...............................476
Opening the fuel tank cap ....234
Regenerative braking ...............70

553Alphabetical Index
TransmissionDriving mode select switch... 308
Hybrid transmission.............. 213
If the shift lever cannot be shifted from P................................. 214
S mode ................................. 215
Trip meters .......................... 89, 95
Turn signal lights Replacing light bulbs ............ 428
Turn signal lever ................... 216
U
USB charging ports................ 355
V
Vanity lights ............................ 369
Vanity mirrors ......................... 369
VDIM (Vehicle Dynamics Inte-grated Management) ............ 312
Vehicle data recording ............... 6
Vehicle Dynamics Integrated Management (VDIM) ............. 312
Vehicle identifi cation number490
Vehicle information display ... 101
Vehicle Stability Control (VSC) ............................................... 311
Ventilators (seat ventilators) . 341
VSC (Vehicle Stability Control) ............................................... 311
W
Warning buzzers ABS ...................................... 447
Airbags ................................. 447
Approach warning ................ 270
Brake hold ............................ 452
Brake Override System ........ 447
Brake system ....................... 445
Charging system .................. 446
Downshifting......................... 216 Drive-Start Control
................447
Electric power steering .........448
Engine ..................................446
Hands off steering wheel warn- ing (LTA) .............................262
High coolant temperature .....445
Hybrid system .......................446
Hybrid system overheat ........446
Intuitive parking assist .288, 290, 450
Low engine oil pressure .......446
LTA (Lane Tracing Assist) ...253, 257, 450
Open door ....................128, 130
PKSB (Parking Support Brake) ...........................................451
Pre-collision braking .............244
RCTA (Rear Cross Traffic Alert) ...........................................450
Seat belt .......................448, 449
Warning label ............................73
Warning lights .........................445 ABS ......................................447
Brake hold operated indicator...........................................452
Brake Override System ........447
Brake system ........................445
Charging system ..................446
Drive-Start Control ................447
Electric power steering .........448
High coolant temperature .....445
Hybrid system overheat warning light .....................................446
Intuitive parking assist OFF indi- cator ...................................450
Low engine oil pressure .......446
Low fuel level........................448
LTA indicator .........................450
Malfunction indica tor lamp ....446
Parking brake indicator.........452
PKSB OFF indicator .............451
Pre-collision syst em .............451