2020 TOYOTA HIGHLANDER HYBRID heating

3224-5. Using the driving support systems
HIGHLANDER HV_U
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may b e generated from
the brake system, but this is not a
malfunction.
■EPS operation sound
When the steering wheel is oper-
ated, a motor sou nd (whirring
sound) may be heard. This does not
indicate 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 hybrid
system off. The E PS system 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 power 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
■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 in any of the following situations.
●The vehicle speed is below 6 mph
(10 km/h)
●Components are damaged
■Secondary Collision Brake
automatic cancellation
The system is automatically can-
celed in any of th e following situa-
tions.
●The vehicle speed drops below
approximately 6 mph (10 km/h)
●A certain amount of time elapses
during operation
●The accelerator pedal is
depressed a large amount
WA R N I N G
■The ABS does not operate
effectively when
●The limits of tire gripping perfor-
mance have been exceeded
(such as excessively worn tires
on a snow covered road).
●The vehicle hydroplanes while
driving at high speed on wet or
slick roads.
■Stopping distance when the
ABS is operating may exceed
that of normal conditions
The ABS is not designed to
shorten the vehicle’s stopping dis-
tance. Always maintain a safe dis-
tance from the veh icle in front of
you, especially in the following sit-
uations:

3254-6. Driving tips
HIGHLANDER HV_U
4
Driving
4-6.Driving tips
When using Eco drive mode, the
torque corresponding to the
accelerator pedal depression
amount can be generated more
smoothly than it is in normal
conditions. In addition, the oper-
ation of the air conditioning sys-
tem (heating/cooling) will be
minimized, improving the fuel
economy. ( P.316)
Eco-friendly driving is possible
by keeping the Hybrid System
Indicator within the Eco area.
( P. 9 0 )
Shift the shift lever to D when
stopped at a traffic light, or driv-
ing in heavy traffic, etc. Shift the
shift lever to P when parking.
When using N, there is no posi-
tive effect on fuel consumption.
In N, the gasoline engine oper-
ates but electricity cannot be
generated. Also, when using the
air conditioning system, etc., the hybrid battery (traction battery)
power is consumed.

Drive your vehicle smoothly.
Avoid abrupt acceleration and
deceleration. Gradual accel-
eration and deceleration will
make more effective use of
the electric motor (traction
motor) without having to use
gasoline engine power.
 Avoid repeated acceleration.
Repeated acceleration con-
sumes hybrid battery (trac-
tion battery) power, resulting
in poor fuel consumption. Bat-
tery power can be restored by
driving with the accelerator
pedal slightly released.
Make sure to operate the brakes
gently and in a timely manner. A
greater amount of electrical
energy can be regenerated
when slowing down.
Repeated acceleration and
deceleration, as well as long
waits at traffic lights, will lead to
bad fuel economy. Check traffic
reports before leaving and avoid
delays as much as possible.
When driving in a traffic jam,
Hybrid vehicle driving
tips
For economical and ecolog-
ical driving, pay attention to
the following points:
Using Eco drive mode
Use of Hybrid System
Indicator
Shift lever operation
Accelerator pedal/brake
pedal operation
When braking
Delays

3395-2. Using the air conditioning system and defogger
HIGHLANDER HV_U
5
Interior features
●The windows may fog up if the
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.316)
■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 filter
 P.433
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the h ood at the loca-
tion shown in the following illustra-
tion.
●The meaning of each symbol on
the label are as follows:
Caution
Air conditioning sys-
tem

3445-2. Using the air conditioning system and defogger
HIGHLANDER HV_U
Select the S-FLOW mode
(P.345)
■When the outside temperature
exceeds 75°F (24°C) and the air
conditioning system is on
●In order to reduce the air condi-
tioning power consumption, the air
conditioning system may switch to
recirculated air mode automati-
cally. This may also reduce fuel
consumption.
●Recirculated air mode is selected
as a default mode when the power
switch is turned to ON.
●It is possible to switch to outside
air mode at any time by pressing
the outside air mode switch.
■Fogging up of the windows
●The windows will easily fog up
when the humidity in the vehicle is
high. Turning “A /C” on will dehu-
midify the air from the outlets and
defog the windshield effectively.
●If you turn “A/C” o ff, the windows
may fog up more easily.
●The windows may fog up if the
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.
■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 restri cted when auto-
matic mode is selected
●To improve air conditioning perfor-
mance, perform the following
operations:
• Adjust the fan speed
• Turn off Eco drive mode ( P.316)
• 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.
■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:

3545-2. Using the air conditioning system and defogger
HIGHLANDER HV_U
■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 power swit ch is in ON.
■Front air condioning con-
trol panel
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.
Vehicle with a 12.3-inch dis-
play
Vehicle with a 8-inch display
WA R N I N G
■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

4977-2. Steps to take in an emergency
HIGHLANDER HV_U
7
When trouble arises
If the engine coolant tempera-
ture gauge enters the red
zone or “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-informa-
tion display
1 Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the hybrid system.
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 hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) for any
leaks.
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
Radiator
Cooling fan
4 The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
“LOW” line
Radiator cap
If your vehicle over-
heats
The following may indicate
that your vehicle is over-
heating.
The needle of the engine
coolant temperature gauge
( P.89) enters the red zone
or a loss of hybrid system
power is experienced. (For
example, the vehicle speed
does not increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” or “Hybrid
System Overheated Output
Power Reduced” is shown
on the multi-information dis-
play.
 Steam comes out from
under the hood.
Correction procedures

556Alphabetical Index
HIGHLANDER HV_U
Back-up lights Replacing light bulbs ............ 443
Battery (12-volt battery) Battery checking................... 416
If the 12-volt battery is dis-charged .............................. 491
Preparing and c hecking before
winter.................................. 327
Replacing ............................. 494
Warning light ........................ 461
Battery (traction battery) ......... 75
Blind Spot Monitor (BSM) ...... 280
Brake Brake hold ............................ 227
Fluid ............................. 414, 511
Parking brake ....................... 224
Regenerative braking ............. 72
Warning light ........................ 460
Brake assist ............................ 319
Break-in tips ........ ................... 191
Brightness control Instrument panel light control . 92
BSM (Blind Spot Monitor) ...... 280
Buzzer Hands off steering wheel warn-ing (LTA) ............................. 265
C
Care Exterior ................................. 394
Interior .................................. 397
Seat belts ............................. 397
Wheels and wheel ornaments........................................... 394
Cargo capacity ....................... 200
Cargo net hooks .. ................... 364
Chains ..................................... 328
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 12-volt battery precautions .417, 495
Airbag precautions .................39
Back door precautions..........135
Child restraint system .............52
Heated steering wheel and seat heater precautio ns..............352
How your child should wear the seat belt ................................28
Moon roof precautions..........183
Panoramic moon roof precau- tions ....................................187
Power window lock switch ....181
Power window precautions...180
Rear door child-protectors ....134
Removed electronic key battery precautions .........................439
Seat belt extender precautions .............................................29
Seat belt precautions..............49
Child-protectors......................134
Cleaning Exterior .................................394
Interior ..................................397
Radar sensor ........................244
Seat belts .............................397
Wheels and wheel ornaments...........................................394
Clock ....................................89, 92
Coat hooks ..............................377
Condenser ............. ..................414
Console box ............................360
Conversation mirror ...............383
Cooling system .......................413 Engine overheating ..............497
Hybrid system overheating ...498

558Alphabetical Index
HIGHLANDER HV_U
EDR (Event data recorder)......... 7
E-Four ...................................... 320
Elapsed time ..................... 96, 106
Electric motor (traction motor)71
Electric Power Steering (EPS) ............................................... 320Warning light ........................ 463
Electronic key ......................... 128 Battery-saving function......... 147
If the electronic key does not operate properly ................. 489
Replacing the battery ........... 438
Electronic roof sunshade Jam protection function ........ 186
Operation ............................. 185
Electronically Controlled Brake System (ECB) ....................... 319
Emergency flashers ............... 452
Emergency, in case of If a warning buzzer sounds .. 460
If a warning light turns on ..... 460
If a warning message is dis-played................................. 470
If the 12-volt battery is dis- charged .............................. 491
If the electronic key does not operate properly ................. 489
If the fuel filler door cannot be opened ............................... 488
If the hybrid sy stem will not start
........................................... 486
If the vehicle is trapped in rising water .................................. 453
If you have a flat tire ............. 474
If you lose your keys ............ 488
If you think something is wrong ........................................... 458
If your vehicle becomes stuck ........................................... 500
If your vehicle has to be stopped in an emergency................. 452 If your vehicle needs to be towed
...........................................455
If your vehicle ove rheats ......497
Energy monitor ....................... 117
Engine ACCESSORY mode . ............216
Compartment........................410
Engine switch .......................213
Hood .....................................408
How to start the hybrid system ...........................................213
Identification number ............506
If the hybrid sys tem will not start
...........................................486
If your vehicle has to be stopped in an emergency .................452
Ignition switch (power switch) ...........................................213
Overheating ..........................497
Power switch ........................213
Tachometer.............................89
Engine coolant Capacity ...............................509
Checking ..............................413
Preparing and checking before winter ..................................327
Engine coolant temperature gauge .......................................89
Engine oil Capacity ...............................508
Checking ..............................410
Preparing and checking before winter ..................................327
Warning light.........................461
Engine oil maintenance data .412
Engine switch (power switch)213 If your vehicle has to be stopped in an emergency .................452
EPS (Electric Po wer Steering)
...............................................320 Warning light.........................463
EV drive mode.........................218