2020 TOYOTA HIGHLANDER HYBRID key battery

1493-2. Opening, closing and locking the doors
HIGHLANDER HV_U
3
Before driving
tery-saving mode to disable the
smart key system. ( P.147)
●If the electronic key is inside the
vehicle and a door handle
becomes wet during a car wash, a
message may be shown on the
multi-information display and a
buzzer will sound outside the vehi-
cle. To turn off the alarm, lock all
the doors.
●The lock sensor may not work
properly if it com es into contact
with ice, snow, mud, etc. Clean
the lock sensor and attempt to
operate it again, or use the lock
sensor on the lower part of the
door handle.
●A sudden handle operation or a
handle operation immediately
after entering the effective range
may prevent the doors from being
unlocked. Touch the door unlock
sensor and check that the doors
are unlocked bef ore pulling the
door handle again.
●If there is another electronic key in
the detection area, it may take
slightly longer to unlock the doors
after the door handle is gripped.
■When the vehicle is not driven
for extended periods
●To prevent theft of the vehicle, do
not leave the electronic key within
6 ft. (2 m) of the vehicle.
●The smart key system can be
deactivated in advance. ( P.526)
●Setting the electronic key to bat-
tery-saving mode helps to reduce
key battery depletion. ( P.147)
■To operate the system properly
Make sure to carry the electronic
key when operating the system. Do
not get the electronic key too close
to the vehicle when operating the
system from the ou tside of the vehi-
cle.
Depending on the position and hold-
ing condition of the electronic key,
the key may not be detected cor- rectly and the system may not oper-
ate properly. (The alarm may go off
accidentally, or the door lock pre-
vention may not operate.)
■If the smart key
system does
not operate properly
If the doors cannot be
locked/unlocked using the smart key
system, lock/unlock the doors by
performing any of the following:
●Bring the electronic key close to
either front door handle and oper-
ate the entry function.
●Operate the wireless remote con-
trol.
If the doors cannot be
locked/unlocked using the above
methods, use the mechanical key.
(  P.489)
If the hybrid system cannot be
started using the smart key system,
refer to P.490.
■Customization
Some functions can be customized.
(  P.526)
■If the smart key system has
been deactivated in a custom-
ized setting
●Locking and unlocking the doors:
Use the wireless remote control or
mechanical key. ( P.131, 489)
●Starting the hybr id system and
changing power switch modes:
 P. 4 9 0
●Stopping the hybrid system:
P. 2 1 5

2134-2. Driving procedures
HIGHLANDER HV_U
4
Driving
4-2.Driving procedures
1 Check that the parking brake
is set.
2 Check that the shift lever is in
P.
3 Firmly depress the brake
pedal.
and a message will be dis-
played on the multi-information dis-
play.
If it is not displayed, the hybrid sys-
tem cannot be started.
4 Press the power switch
shortly and firmly.
When operating the power switch,
one short, firm press is enough. It is
not necessary to press and hold the
switch.
If the “READY” indicator turns on,
the hybrid system will operate nor-
mally.
Continue depressing the brake
pedal until the “READY” indicator is
illuminated.
The hybrid system can be started from any power switch mode.
5
Check that the “READY” indi-
cator is illuminated.
The vehicle will not move when the
“READY” indicator is off.
■If the hybrid system does not
start
●The immobilizer system may not
have been deactivated. ( P. 7 9 )
Contact your Toyota dealer.
●If a message related to start-up is
shown on the multi-information
display, read the message and fol-
low the instructions.
■When the ambient temperature
is low, such as during winter
driving conditions
When starting the hybrid system,
the flashing time of the “READY”
indicator may be long. Leave the
vehicle as it is until the “READY”
indicator is steady on, as steady
means the vehicle is able to move.
■Sounds and vibrations specific
to a hybrid vehicle
 P. 7 3
■If the 12-volt b attery is dis-
charged
The hybrid system cannot be started
using the smart key system. Refer
to P.491to r estart the hybrid system.
■Electronic key battery depletion
 P.128
Power (ignition)
switch
Performing the following
operations when carrying
the electronic key on your
person starts the hybrid
system or changes power
switch modes.
Starting the hybrid sys-
tem

2144-2. Driving procedures
HIGHLANDER HV_U
■Conditions affecting operation
 P. 1 4 7
■Note for the entry function
 P. 1 4 8
■Steering lock function
●After turning the power switch off
and opening and closing the
doors, the steer ing wheel will be
locked due to the steering lock
function. Operating the power
switch again automatically can-
cels the steering lock.
●When the steering lock cannot be
released, “Push Power Switch
while Turning Steering Wheel in
Either Direction” will be displayed
on the multi-information display.
Check that the shift lever is in P.
Press the power switch shortly
and firmly while turning the steer-
ing wheel left and right.
●To prevent the steering lock motor
from overheating, operation of the
motor may be suspended if the
hybrid system is turned on and off
repeatedly in a short period of
time. In this case, refrain from
operating the hybrid system. After
about 10 seconds, the steering
lock motor will resume functioning.
■If the “READY” indicator does
not come on
In the event that the “READY” indi-
cator does not come on even after
performing the proper procedures
for starting the vehicle, contact your
Toyota dealer immediately.
■If the hybrid system is malfunc-
tioning
 P. 7 8
■Electronic key battery
 P.438
■Operation of the power switch
●If the switch is not pressed shortly
and firmly, the power switch mode
may not change o r the hybrid sys-
tem may not start.
●If attempting to res tart the hybrid
system immediately after turning
the power switch off, the hybrid
system may not start in some
cases. After turning the power
switch off, please wait a few sec-
onds before restarting the hybrid
system.
■Customization
If the smart key system has been
deactivated in a customized setting,
refer to P.489.
WA R N I N G
■When starting the hybrid sys-
tem
Always start the hybrid system
while sitting in the driver’s seat.
Do not depress t he accelerator
pedal while starting the hybrid
system under any circumstances.
Doing so may cause an accident
resulting in death o r serious injury.
■Caution while driving
If hybrid system failure occurs
while the vehicle is moving, do not
lock or open the doors until the
vehicle reaches a safe and com-
plete stop. Activation of the steer-
ing lock in this c ircumstance may
lead to an accident, resulting in
death or serious injury.

2304-3. Operating the lights and wipers
HIGHLANDER HV_U
■Headlight control sensor
The sensor may not function prop-
erly if an object is placed on the sen-
sor, or anything that blocks the
sensor is affixed to the windshield.
Doing so interfere s with the sensor
detecting the level of ambient light
and may cause the automatic head-
light system to malfunction.
■Automatic light off system
●When the headlights are on: The
headlights and tail lights turn off
30 seconds after a door is opened
and closed if the power switch is
turned to ACC or OFF. (The lights
turn off immediately if on the
key is pressed afte r all the doors
are closed.)
●When only the tail lights are on:
The tail lights tu rn off automati-
cally if the power switch is turned
to ACC or OFF an d the driver’s
door is opened.
Except for Canada: To turn the lights
on again, turn the power switch to
ON, or turn the light switch off once
and then back to or .
For Canada: To tu rn the lights on
again, turn the power switch to ON,
or turn the light s witch to once
and then back to or .
■Automatic headlight leveling
system (if equipped)
The level of the headlights is auto-
matically adjusted according to the
number of passengers and the load-
ing condition of the vehicle to
ensure that the headlights do not interfere with o
ther road users.
■Light reminder buzzer
A buzzer sounds when the power
switch is turned off or turned to ACC
and the driver’s door is opened
while the lights are turned on.
■Welcome lighting
The parking lights and tail lights
automatically turn on at night when
the doors are un locked using the
entry function or wireless remote
control if the light switch is in the
position.
■Windshield wiper linked head-
light illumination
When driving during daytime with
the headlight switch turned to , if
the windshield wipers are used, the
headlights will turn o n automatically
after several se conds to help
enhance the visibility of your vehi-
cle.
■12-volt battery-saving function
In order to prevent the 12-volt bat-
tery of the vehicle from discharging,
if the headlights and/or tail lights are
on when the power switch is turned
off the 12-volt battery-saving func-
tion will operate and automatically
turn off all the lig hts after approxi-
mately 20 minutes. When the power
switch is turned to ON, the 12-volt
battery-saving function will be dis-
abled.
When any of the following are per-
formed, the 12-volt battery-saving
function is canceled once and then
reactivated. All the lights will turn off
automatically 20 mi nutes after the
12-volt battery-saving function has
been reactivated:
●When the headlight switch is oper-
ated
●When a door is opened or closed
■Customization
Some functions can be customized.
(  P.526)

393
HIGHLANDER HV_U
6
6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 394
Cleaning and protecting the vehicle interior ........... 397
6-2. Maintenance Maintenance requirements.................................. 400
General maintenance.. 402
Emission inspection and maintenance (I/M) pro-
grams ........................ 404
6-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 406
Hood ........................... 408
Positioning a floor jack .................................. 409
Engine compartment ... 410
12-volt battery ............. 416
Tires ............................ 418
Tire inflation pressure.. 430
Wheels ......... ...............432
Air conditioning filter .... 433
Cleaning the hybrid battery (traction battery) air intake
vents and filter ........... 435
Electronic key battery.. 438
Checking and replacing fuses.......................... 439
Headlight aim .............. 442Light bulbs ...................
443

4176-3. Do-it-yourself maintenance
HIGHLANDER HV_U
6
Maintenance and care
■After recharging/reconnecting
the 12-volt battery
●The hybrid system may not start.
Follow the procedure below to ini-
tialize the system.
1 Shift the shift lever to P.
2 Open and close any of the doors.
3 Restart the hybrid system.
●Unlocking the doors using the
smart key system may not be pos-
sible immediately after reconnect-
ing the 12-volt battery. If this
happens, use the wireless remote
control or the mechanical key to
lock/unlock the doors.
●Start the hybrid system with the
power switch in ACC. The hybrid
system may not start with the
power switch turned off. However,
the hybrid system will operate nor-
mally from the second attempt.
●The power switch mode is
recorded by the vehicle. If the
12-volt battery is reconnected, the
vehicle will return the power
switch mode to the status it was in
before the 12-volt battery was dis-
connected. Make sure to turn off
the power before disconnect the
12-volt battery. Take extra care
when connecting the 12-volt bat-
tery if the power switch mode prior
to discharge is unknown.
If the system will not start even after
multiple attempts at all the methods
above, contact your Toyota dealer.
WA R N I N G
■Chemicals in the 12-volt bat-
tery
The 12-volt battery contains poi-
sonous and corrosi ve sulfuric acid
and may produce hydrogen gas
which is flammable and explosive.
To reduce the risk of death or seri-
ous injury, take th e following pre-
cautions while working on or near
the 12-volt battery:
●Do not cause sparks by touch-
ing the 12-volt battery terminals
with tools.
●Do not smoke or light a match
near the 12-volt battery.
●Avoid contact with eyes, skin
and clothes.
●Never inhale or swallow electro-
lyte.
●Wear protective safety glasses
when working near the 12-volt
battery.
●Keep children away from the
12-volt battery.
■Where to safely charge the
12-volt battery
Always charge the 12-volt battery
in an open area. Do not charge
the 12-volt battery in a garage or
closed room where there is insuf-
ficient ventilation.
■How to recharge the 12-volt
battery
Only perform a s low charge (5 A
or less). The 12-volt battery may
explode if charg ed at a quicker
rate.
■Emergency measures regard-
ing electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean
water for at least 15 minutes
and get immediate medical
attention. If possible, continue
to apply water with a sponge or
cloth while traveling to the near-
est medical facility.
●If electrolyte gets on your skin
Wash the affected area thor-
oughly. If you feel pain or burn-
ing, get medical attention
immediately.

4386-3. Do-it-yourself maintenance
HIGHLANDER HV_U
■If the electronic key battery is
depleted
The following symptoms may occur:
●The smart key system and wire-
less remote contr ol will not func-
tion properly.
●The operational range will be
reduced.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purchased at
your Toyota dealer, local electrical
appliance shops or camera stores.
●Replace only with the same or
equivalent type recommended by
the manufacturer.
●Dispose of used ba tteries accord-
ing to the local laws.
1 Release the lock and remove
the mechanical key.
2 Remove the key cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a rag.
3Remove the depleted battery.
When removing the cover, the elec-
tronic key module may stick to the
cover and the batt ery may not be
visible. In this case, remove the
electronic key module in order to
remove the battery.
When removing the battery, use a
screwdriver of an appropriate size.
Insert a new battery with the “+” ter-
Electronic key batter y
Replace the battery with a
new one if it is depleted.
You will need the follow-
ing items:
Replacing the battery

451
HIGHLANDER HV_U
7
7
When trouble arises
When trouble arises
.7-1. Essential informationEmergency flashers .... 452
If your vehicle has to be stopped in an emergency.................................. 452
If the vehicle is trapped in rising water ................ 453
7-2. Steps to take in an emer- gency
If your vehicle needs to be towed......................... 455
If you think something is wrong ........................ 458
If a warning light turns on or a warning buzzer sounds.................................. 460
If a warning message is dis- played........................ 470
If you have a flat tire.... 474
If the hybrid system will not start ........................... 486
If you lose your keys ... 488
If the fuel filler door cannot be opened ................. 488
If the electronic key does not operate properly .. 489
If the 12-volt battery is dis- charged ..................... 491
If your vehicle overheats .................................. 497
If the vehicle becomes stuck .................................. 500