2023 TOYOTA HIGHLANDER heating

3104-5. Using the driving support systems
■AWD system operation sounds
and vibrations when switching
between AWD and front wheel
drive (if equipped)
When the vehicle switches from
AWD to front wheel drive and vice
versa, operation sounds and vibra-
tions may be generated, but this is
not a malfunction.
■Reduced effectiveness of the
EPS system
The effectiveness of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period of time. The steer-
ing wheel may feel heavy as a
result. Should this occur, refrain
from excessive steering input or
stop the vehicle and turn the engine
off. The EPS syst em should return
to normal within 10 minutes.
■Automatic reactivation of
TRAC, Trailer Sway Control and
VSC systems
After turning the TRAC, Trailer
Sway Control and VSC systems off,
the systems will be automatically
re-enabled in the following situa-
tions:
●When the engine switch is turned
OFF
●If only the TRAC system is turned
off, the TRAC will turn on when
vehicle speed increases
If both the TRAC and VSC sys-
tems are turned off, automatic
re-enabling will not occur when
vehicle speed increases.
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is at tempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■If a message about AWD is
shown on the multi-information
display (AWD models)
Perform the following actions.
●“AWD System Over-heated
Switching to 2WD Mode.” AWD
system is overheated. Stop the
vehicle in a safe place with the
engine running.
*
If the message disappears after a
while, there is no problem. If the
message remains, have the vehi-
cle inspected by your Toyota
dealer immediately.
●“AWD System Over-heated 2WD
Mode Engaged.” AWD system
has been temporarily released
and switched to front-wheel drive
due to overheating. Stop the vehi-
cle in a safe place with the engine
running.
*
If the message disappears after a
while, AWD system will automati-
cally recover. If the message
remains, have the vehicle
inspected by your Toyota dealer
immediately.
●“AWD system Malfunction 2WD
Mode Engaged Visit Your Dealer.”
A malfunction occurs in the AWD
system. Have the vehicle
inspected by your Toyota dealer
immediately.
*: When stopping the vehicle, do not stop the engine until the display
message has turned off.
■Secondary Collision Brake
operating conditions
The system operates when the SRS
airbag sensor de tects a collision
while the vehicle is in motion.
However, the system does not oper-
ate when the components are dam-
aged.

3255-1. Using the air conditioning system and defogger
5
Interior features
recirculated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up
by the vehicle is still drawn into the
vehicle after closing the windows, it
is recommended that the air intake
mode be set to outside air mode and
the fan speed to any setting except
off.
■Outside/recirculated air mode
●Setting to the r ecirculated air
mode temporarily is recom-
mended in preventing dirty air
from entering the vehicle interior
and helping to c ool the vehicle
when the outside air temperature
is high.
●Outside/recirculated air mode may
automatically switch depending on
the temperature setting or the
inside temperature.
■Operation of the air condition-
ing system in Eco drive mode
●In Eco drive mode, the air condi-
tioning system is controlled as fol-
lows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict
heating/cooling capacity
• Fan speed restr icted when auto-
matic mode is selected
●To improve air co nditioning perfor-
mance, perform the following
operations:
• Adjust the fan speed
• Turn off Eco drive mode ( P.300)
■When the outside temperature
is low
The dehumidification function may
not operate even when the “A/C”
switch is pressed.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condi-
tioning system to the outside air
mode.
●During use, various odors from
inside and outside the vehicle may enter into and accumulate in the
air conditioning system. This may
then cause odor
to be emitted
from the vents.
●To reduce potential odors from
occurring:
• It is recommended that the air conditioning system be set to out-
side air mode prior to turning the
vehicle off.
• The start timing of the blower may
be delayed for a short period of
time immediately after the air con-
ditioning system is started in auto-
matic mode.
●When parking, the system auto-
matically switches to outside air
mode to encourage better air cir-
culation throughout the vehicle,
helping to reduce odors that occur
when starting the vehicle.
■Air conditioning system opera-
tions when the engine is
stopped due to the Stop & Start
system (vehicles with Stop &
Start system)
When the engine is stopped due to
Stop & Start system operations, the
automatic air conditioning cooling,
heating and dehumidification func-
tions turn off and the fan speed is
decreased according to the outside
temperature etc. or air blowing
stops. To stop the air conditioning
system from turning off, press the
Stop & Start cancel switch and
refrain from using the Stop & Start
system.
■When the windshield is fogged
up and the engine is stopped
due to the Stop & Start system
(vehicles with Stop & Start sys-
tem)
Press the windshield defogger
switch to restart the engine and
defog the windshield.
If the windshield continuously fogs
up, press the Stop & Start cancel
switch and refrain from using the
Stop & Start system.

3285-1. Using the air conditioning system and defogger
■Eco air conditioning mode
When Eco drive mode is selected
using the driving mode select
switch, eco air conditioning mode
turns on.
When a drive mode other than Eco
drive mode is sele cted, eco air con-
ditioning mode may turn off.
■Operation of the air condition-
ing system in Eco drive mode
●In Eco drive mode, the air condi-
tioning system is controlled as fol-
lows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict
heating/cooling capacity
• Fan speed restr icted when auto-
matic mode is selected
●To improve air co nditioning perfor-
mance, perform the following
operations:
• Adjust the fan speed
• Turn off Eco drive mode ( P.300)
• Turn off Eco air conditioning mode
●When the driving mode is set to
Eco driving mode, the air condi-
tioning eco mode will be turned on
automatically. Even in this case,
the air conditioning eco mode can
be turned off by pressing the Eco
air conditioning mode switch.
■When the outside temperature
is low
The dehumidification function may
not operate even when “A/C” is
pressed.
1 Press the automatic mode
switch.
The dehumidification function
begins to operate. Air outlets and
fan speed are automatically
adjusted according to the tempera-
ture setting and humidity.
2 Adjust the temperature set-
ting. 3
To stop the operation, press
the “OFF” switch.
If the fan speed setting or air
flow modes are operated, the
automatic mode indicator goes
off. However, automatic mode
for functions other than that
operated is maintained.
■Using automatic mode
Fan speed is adjusted automati-
cally according to the temperature
setting and the am bient conditions.
Therefore, the fan may stop for a
while until warm or cool air is ready
to flow immediately after the auto-
matic mode switch is pressed.
This function automatically con-
trols the air conditioning airflow
so that priority is given to the
front seats. Unnecessary air
conditioning is suppressed, con-
tributing to increased fuel effi-
ciency.
Front seat concentrated airflow
mode operates in the following
situations.
 No passengers are detected
in the rear seats
 The windshield defogger is
not operating
While operating, the indicator illumi-
nates on the S-FLOW mode switch.
Using automatic mode
Front seat concentrated
airflow mode (S-FLOW)

3365-1. Using the air conditioning system and defogger
■Rear
Each time the switch is pressed,
the operation condition changes
as follows.
Hi (3 segments lit) Mid (2 seg-
ments lit) Lo (1 segment
lit) Off
The level indica tor (amber)
lights up during operation.
■Operation condition
The engine switch is in ON.
Each time the switch is pressed,
the operation condition changes
as follows.
Hi (3 segments lit) Mid (2 seg-
ments lit) Lo (1 segment
lit) Off
The level indicato r (green) lights
up during operation.
■Operation condition
The engine switch is in ON.
WARNING
■To prevent overheating and
minor burn injuries
Observe the following precautions
when using the seat heaters.
●Do not cover the seat with a
blanket or cushion when using
the seat heater.
●Do not use seat heater more
than necessary.
Seat ventilators

3535-4. Using the other interior features
5
Interior features
■The wireless charger can be
operated when
The engine switch is in ACC or ON.
■Portable devices that can be
charged
●Portable devices compatible with
the Qi wireless charging standard
can be charged by the wireless
charger. However, compatibility
with all devices which meet the Qi
wireless charging standard is not
guaranteed.
●The wireless charger is designed
to supply low power electricity (5
W or less) to a cellular phone,
smartphone, or other portable
device.
●Failure to do so may result in the
possibility of fire, However, porta- ble devices, such as the following,
can be charged with more than 5
W.
• 7.5 W charging compatible iPhones can be charged at 7.5 W
or less.
• Portable devices which conform to WPC Ver 1.2.4 (Extended Power
profile ) can be charged at 10 W or
less.
■If a cover or accessory is
attached to the portable device
Do not charge a portable device if a
cover or accessory w hich is not Qi
compatible is atta ched. Depending
on the type of cover (including for
certain genuine manufacturer parts)
and/or accessory a ttached, it may
not be possible to charge the porta-
ble device. If the portable device is
placed on the charging area and
Orange
(Repeatedly
flashes 3 times
continuously)
Gray
Foreign substance detection:
A metallic foreign substance is in the
charge area, and so the abnormal heat-
ing prevention function of the charging
coil operated
→Remove the foreign substance from
the charge area.
Portable device misaligned:
→The charging coil in the portable
device moved outside of the charge
area, and so the abnormal heating pre-
vention function of the charging coil
operated
Orange
(Repeatedly
flashes 4 times
continuously)
Gray
Safety shutdown resulting when the
temperature within the wireless charger
exceeded the set value
→Stop charging, remove the portable
device from the charging tray, wait for
the temperature to drop, and then start
charging again.
Operation indicator lightSuspected causes/Handling methodCharging trayCenter display

3555-4. Using the other interior features
5
Interior features
WARNING
●Do not use the charging tray as
a small storage space.
●Do not subject to a strong force
or impact.
●Do not disassemble, modify or
remove the wireless charger.
●Do not charge devices other
than specified portable devices.
●Keep away from magnetic
items.
●Do not charge devices if the
charge area is covered in dust.
●Do not cover with a cloth or sim-
ilar material.
NOTICE
■Situations in which the func-
tion may not operate normally
Devices may not be charged nor-
mally in the following situations.
●The portable device is fully
charged
●The portable device is being
charged with a cable connected
●There is foreign matter between
the charge area and portable
device
●Charging has caused the porta-
ble device to heat up
●The temperature around the
charging tray is 95°F (35°C) or
higher, such as in extreme heat
●The portable device is placed
with its charging side facing up
●The portable device is placed in
an area misaligned from the
charge area
●The portable device is larger
than the charging tray
●A foldable and portable device
is placed outside the charge
area
●The camera lens protrudes 0.12
in. (3 mm) or more from the sur-
face of the portal device
●The vehicle is in an area where
strong electrical waves or noise
are emitted, such as near a tele-
vision tower, power plant, gaso-
line station, broadcasting
station, large display, airport,
etc.
●Any of the following objects that
is protrudes 0.08 in. (2 mm) or
thicker is stuck or installed
between the charging side of
the portable device and the
charge area.
• Thick cases or covers
• A case or cover attached with an uneven or tilt ed surface, so
that the charging side is not flat
• Thick decorations
• Accessories, such as finger- rings, straps, etc.
●When the portable device is in
contact with, or is covered by
any of the following metallic
objects:
• A card that has metal on it, such as aluminum foil, etc.
• A pack of cigarettes that includes aluminum foil
• A wallet or bag that is made of metal
• Coins
• A heating pad
• CDs, DVDs or other media

4697-2. Steps to take in an emergency
7
When trouble arises1Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the engine.
2 If you see steam:
Carefully lift the hood after
the steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled
down sufficiently, inspect the
NOTICE
■When handling jumper cables
When connecting the jumper
cables, ensure that they do not
become entangled in the cooling
fan or engine drive belt.
If your vehicle over-
heats
The following may indicate
that your vehicle is over-
heating.
 The needle of the engine
coolant temperature gauge
( P.79) enters the red zone
or a loss of engine power is
experienced. (For example,
the vehicle speed does not
increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” is shown
on the multi-information dis-
p l a y.
 Steam comes out from
under the hood.
Correction procedures

526Alphabetical Index
AWD Control ............................. 91
B
Back door ................................ 119
Back-up lightsReplacing light bulbs ............ 415
Battery Battery checking................... 391
If the battery is discharged ... 465
Preparing and c hecking before
winter.................................. 314
Replacing ............................. 467
Warning light ........................ 432
Blind Spot Monitor (BSM) ...... 270
Brake Brake hold ............................ 208
Fluid ............................. 390, 479
Parking brake ....................... 205
Warning light ........................ 431
Brake assist ............................ 307
Break-in tips ........ ................... 175
Brightness control Instrument panel light control81, 86
BSM (Blind Spot Monitor) ...... 270
Buzzer Hands off steering wheel warn-ing (LTA) ............................. 248
C
Care Exterior ................................. 370
Interior .................................. 373
Seat belts ............................. 373
Wheels and wheel ornaments........................................... 370
Cargo capacity ....................... 184
Cargo net hooks .. ................... 344
Chains ..................................... 315
Child restraint system Fixed with a LATCH system ... 60 Fixed with a seat belt..............55
Front passenger occupant clas-
sification system ...................43
Points to remember ................50
Riding with children ................49
Types of child restraint system installation method ...............52
Using an anchor bracket ........62
Child safety Airbag precautions .................39
Back door precautions.......... 119
Battery precautions ......392, 468
Child restraint system .............52
Heated steering wheel and seat heater precautio ns..............335
How your child should wear the seat belt ................................28
Moon roof precautions..........166
Panoramic moon roof precau- tions ....................................170
Power window lock switch ....164
Power window precautions...163
Rear door child-protectors .... 118
Seat belt extender precautions .............................................29
Seat belt precautions..............49
Child-protectors...................... 118
Cleaning Exterior .................................370
Interior ..................................373
Radar sensor ........................224
Seat belts .............................373
Wheels and wheel ornaments...........................................370
Clock ................... .....79, 81, 82, 86
Coat hooks ..............................357
Condenser ............. ..................390
Console box ............................341
Consumption screen ..............108
Conversation mirror ...............359
Cooling system .......................389 Engine overheating ..............469