battery LEXUS RX450h 2021 Owner's Manual

1263-2. Opening, closing and locking the doors
■If “Key Left inside Vehicle” is shown on
the multi-information display
An attempt was made to lock the doors
using the smart access system with
push-button start while the electronic key
was still inside the vehicle. Retrieve the elec-
tronic key from the vehicle and lock the
doors again.
■Battery-saving function
The battery-saving fu nction will be acti-
vated in order to prevent the electronic key
battery and the 12-volt battery from being
discharged while the vehicle is not in opera-
tion for a long time.
●In the following situations, the smart
access system with pu sh-button start may
take some time to unlock the doors.
• The electronic key has been left in an
area of approximately 6 ft. (2 m) of the
outside of the vehicle for 10 minutes or
longer.
• The smart access system with push-but- ton start has not been used for 5 days or
longer.
●If the smart access system with push-but-
ton start has not been used for 14 days or
longer, the doors cannot be unlocked at
any doors except the driver’s door. In this
case, take hold of the driver’s door han-
dle, or use the wireless remote control or
the mechanical key, to unlock the doors.
■Turning an electronic key to bat-
tery-saving mode
When battery-saving mode is set, battery
depletion is minimized by stopping the elec-
tronic key from re ceiving radio waves. Press twice while pressing and holding
. Confirm that the electronic key indica-
tor flashes 4 times.
While the battery-saving mode is set, the
smart access system with push-button start
cannot be used. To cancel the function,
press any of the electronic key buttons.
■Conditions affecting operation
The smart access system with push-button
start, wireless remote control and immobi-
lizer system use weak radio waves. In the
following situations, the communication
between the electronic key and the vehicle
may be affected, preventing the smart
access system with push-button start, wire-
less remote control and immobilizer system
from operating properly. (Ways of coping:
 P.447)
●When the electronic key battery is
depleted
●Near a TV tower, electric power plant,
gas station, radio stat ion, large display,
airport or other fac ility that generates
strong radio waves or electrical noise
●When the electronic key is in contact
with, or is covered by the following metal-
lic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
•Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When other wireless keys (that emit radio
waves) are being used nearby
●When carrying the electronic key
together with the following devices that
emit radio waves
• Portable radio, cellular phone, cordless
phone or other wireless communication
SituationCorrection
procedure
The power switch was
turned to ACCESSORY
mode while the driver’s
door was open (The
driver’s door was opened
when the power switch
was in ACCESSORY
mode).
Turn the power
switch off and
close the
driver’s door.

1273-2. Opening, closing and locking the doors
3
Before driving
devices
• Another vehicle’s electronic key, another electronic key of your vehicle, or a wire-
less key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or
metallic objects are attached to the rear
window
●When the electronic key is placed near a
battery charger or electronic devices
●When the vehicle is parked in a pay park-
ing spot where radio waves are emitted
■Note for the entry function
●Even when the electronic key is within the
effective range (detection areas), the sys-
tem may not operate properly in the fol-
lowing cases:
• The electronic key is too close to the win-
dow or outside door handle, near the
ground, or in a high place when the doors
are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the rear
bumper center when the back door is
opened.
• The electronic key is on the instrument panel, luggage compar tment, floor, or in
the door pockets or glove box when the
hybrid system is star ted or power switch
modes are changed.
●Do not leave the electronic key on top of
the instrument panel or near the door
pockets when exiting the vehicle.
Depending on the radio wave reception
conditions, it may be detected by the
antenna outside the cabin and the door
will become lockable from the outside,
possibly trapping the electronic key
inside the vehicle.
●As long as the electron ic key is within the
effective range, the doors may be locked
or unlocked by anyone.
●Even if the electronic key is not inside the
vehicle, it may be possible to start the
hybrid system if the electronic key is near
the window.
●The doors may unlock if a large amount of water splashes on the door handle,
such as in the rain or in a car wash when
the electronic key is
within the effective
range. (The door will automatically be
locked after approximately 60 seconds if
the doors are not opened and closed.)
●If the wireless remote control is used to
lock the doors when the electronic key is
near the vehicle, there is a possibility that
the door may not be unlocked by the
entry function. (Use the wireless remote
control to unlock the doors.)
●Touching the door lock sensor while
wearing gloves may delay or prevent lock
operation. Remove the gloves and touch
the lock sensor again.
●When the lock operation is performed
using the lock sensor, recognition signals
will be shown up to two consecutive
times. After this, no recognition signals
will be given.
●If the door handle becomes wet while the
electronic key is within the effective
range, the door may lock and unlock
repeatedly. In that case, follow the follow-
ing correction procedures to wash the
vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle.
(Take care to ensure that the key is not
stolen.)
• Set the electronic key to battery-saving
mode to disable the smart access system
with push-button start. ( P.126)
●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 vehicle. To
turn off the alarm, lock all the doors.
●The lock sensor may not work properly if
it comes into contact with ice, snow, mud,
etc. Clean the lock sensor and attempt to
operate it again.
●A sudden approach to the effective
range or door handle may prevent the
doors from being unlocked. In this case,
return the door handle to the original
position and check that the doors unlock
before pulling the door handle again.
●If there is another electronic key in the

1283-2. Opening, closing and locking the doors
detection area, it may take slightly longer
to unlock the doors after the door handle
is gripped.
●Fingernails may scrape against the door
during operation of the door handle. Be
careful not to injure fingernails or dam-
age the surface of the door.
■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 access syst em with push-but-
ton start can be deactivated in advance.
●Setting the electronic key to battery-sav-
ing mode helps to reduce key battery
depletion. ( P.126)
■To operate the system properly
Make sure to carry the electronic key when
operating the system. Do not get the elec-
tronic key too close to the vehicle when
operating the system from the outside of the
vehicle.
Depending on the position and holding
condition of the electronic key, the key may
not be detected correctly and the system
may not operate properly. (The alarm may
go off accidentally, or the door lock preven-
tion may not operate.)
■If the smart access system with
push-button start does not operate
properly
●If the doors cannot be locked or unlocked
and the back door cannot be opened,
perform the following.
• Bring the electronic key close to the door handle and perform a lock or unlock
operation.
• Bring the electronic key close to the but- ton on the back door ( P.114) and press
the button.
• Use the wireless remote control.
If the doors cannot be locked or unlocked
by perform the above, use the mechanical
key. ( P.447) However, if the mechanical
key is used while the al arm system is set, the
warning will sound. ( P.75)
●If the hybrid system cannot be started,
refer to  P.448
■Customization
Some functions can be customized.
(  P.480)
■If the smart access system with
push-button start has been deactivated
in a customized setting
●Locking and unlockin g the doors: Use
the wireless remote control or mechani-
cal key. ( P.109, 114, 447)
●Starting the hybrid system and changing
power switch modes: P.448
●Stopping the hybrid system: P.186

1513-4. Adjusting the steering wheel and mirrors
3
Before driving
nor “R”.
To set the mirror angle used when the vehi-
cle is reversing, adjust the mirror angle at a
desired position with the shift lever in R.
The adjusted angle will be memorized and
the mirror will automatically tilt to the mem-
orized angle whenever the shift lever is
shifted to R from next time.
The memorized downward tilt position of
the mirror is linked to the normal position
(angle adjusted with the shift lever in other
than R). Therefore, if the normal position is
changed after adjustment, the tilt position
will also change.
When the normal position is changed, read-
just the angle in reversing.
Push the mirror back in the direction of
the vehicle’s rear.
■Using the switch
Press the switch to fold the mirrors.
Press it again to extend them to the original
position.
■Setting automatic mode
Automatic mode allows the folding or
extending of the mirrors to be linked to
locking/unlocking of the doors.
Press the “AUTO” switch to set auto-
matic mode.
The indicator will come on.
Pressing the switch on ce more will return
to manual mode.
■When disconnecting and reconnecting
12-volt battery terminals (power type)
The automatic folding/extending mirror
function will return to off as default. To turn
the function on, press the switch again to
select on.
■Using automatic mode in cold weather
(if equipped)
When automatic mode is used in cold
weather, the door mirror could freeze up
and automatic stowing and return may not
be possible. In this case, remove any ice and
WARNING
■When the mirror defoggers are oper-
ating
Do not touch the rear view mirror sur-
faces, as they can become very hot and
burn you.
Folding the mirrors (manual
type)
Folding and extending the mir-
rors (power type)
A

1553-5. Opening, closing the windows and moon roof
3
Before driving
This function can be used to prevent
children from accidentally opening or
closing a passenger window.
Press the switch.
The indicator will come on and the pas-
senger windows will be locked.
The passenger windows can still be
opened and closed using the driver’s
switch even if the lock switch is on.
■The power windows can be operated
when
The power switch is in ON mode.
■When the 12-volt battery is discon-
nected
The window lock switch is disabled. If nec-
essary, press the window lock switch after
reconnecting the 12-volt battery.
*: If equipped
■Opening and closing
1 Opens the moon roof
*
The moon roof stops slightly before the
fully open position to reduce wind noise.
Press the switch again to fully open the
moon roof.
2 Closes the moon roof*
*: Lightly press either side of the moon roof
switch to stop the moon roof partway.
■Tilting up and down
1 Tilts the moon roof up
*
2Tilts the moon roof down*
WARNING
●The catch protection function may not
work if something gets caught just
before the window is fully opened. Be
careful not to get any part of your body
or clothing caught in the window.
Preventing accidental operation
(window lock switch)
A
Moon roof*
Use the overhead switches to open
and close the moon roof and tilt it
up and down.
Operating the moon roof

1854-2. Driving procedures
4
Driving
■Electronic key battery depletion
 P.106
■Conditions affe cting operation
 P.126
■Note for the entry function
 P.127
■Steering lock function
●After turning the power switch off and
opening and closing the doors, the steer-
ing wheel will be lock ed due to the steer-
ing lock function. Operating the power
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Steering Wheel Lock Press
Power Switch while Turning Wheel” will
be displayed on the multi-information dis-
play.
Check that the shift leve r is in P. Press the
power switch shortly and firmly while
turning the steering 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 stee ring lock motor will
resume functioning.
■When “Access System with Elec. Key
Malfunction See Owner’s Manual” is
displayed on the mu lti-information dis-
play
The system may be malfunctioning. Have
the vehicle inspected by your Lexus dealer
immediately.
■If the “READY” indicator does not come
on
In the event that the “READY” indicator does not come on even after performing
the proper procedures for starting the vehi-
cle, contact your Lexus dealer immediately.
■If the hybrid system
is malfunctioning
 P.72
■Electronic key battery
 P.393
■Operation of the power switch
●If the switch is no t pressed shortly and
firmly, the power switch mode may not
change or the hybrid system may not
start.
●If attempting to restart 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 seconds
before restarting the hybrid system.
■Customization
If the smart access system with push-button
start has been deactivated in a customized
setting, refer to P.447.
WARNING
■When starting the hybrid system
Always start the hybrid system while sit-
ting in the driver’s seat. Do not depress
the accelerator pedal while starting the
hybrid system under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury.
WARNING
■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
complete stop. Activation of the steering
lock in this circumstance may lead to an
accident, resulting in death or serious
injury.

1874-2. Driving procedures
4
Driving
Modes can be changed by pressing
the power switch with brake pedal
released. (The mode changes each
time the switch is pressed.)1
Off
*
The emergency flashers can be used.
2ACCESSORY mode
Some electrical components such as the
audio system can be used.
“ACCESSORY” will be displayed on the
meters.
3ON mode
All electrical components can be used.
“IGNITION ON” will be displayed on the
meters.
*: If the shift lever is in a position other than
P when turning off the hybrid system, the
power switch will be turned to ACCES-
SORY mode, not to off.
■Auto power off function
If the vehicle is left in ACCESSORY mode
for more than 20 minutes or ON mode
(with the hybrid system is not operating) for
more than an hour with the shift lever in P,
the power switch will automatically turn off.
However, this function cannot entirely pre-
vent 12-volt battery discharge. Do not leave
the vehicle with the power switch in
■When parking
Exhaust gases include harmful carbon
monoxide (CO), which is colorless and
odorless. Observe the following precau-
tions.
Failure to do so may cause exhaust gases
to enter the vehicle and may lead to an
accident caused by light-headedness, or
may lead to death or a serious health
hazard.
●If the vehicle is in a poorly ventilated
area or a closed area, such as a
garage, stop the hybrid system.
●Do not leave the vehicle with the
hybrid system operating for a long
time. If such a situation cannot be
avoided, park the vehicle in an open
space and ensure that exhaust fumes
do not enter the vehicle interior.
●Do not leave the hybrid system operat-
ing in an area with snow build-up, or
where it is snowing. If snowbanks build
up around the vehicle while the hybrid
system is operating, exhaust gases
may collect and enter the vehicle.
Changing power switch modes

1884-2. Driving procedures
ACCESSORY or ON mode for long peri-
ods of time when the hybrid system is not
operating.
If the hybrid system is stopped with the
shift lever in a position other than P, the
power switch will not be turned off but
instead be turned to ACCESSORY
mode. Perform the following proce-
dure to turn the switch off:
1Check that the parking brake is set.
2 Shift the shift lever to P.
3 Check that “Turn Off Vehicle” is
displayed on the multi-information
display and then press the power
switch once.
4 Check that “Turn Off Vehicle” on
the multi-information display is off.
NOTICE
■To prevent 12-volt battery discharge
●Do not leave the power switch in
ACCESSORY or ON mode for long
periods of time without the hybrid sys-
tem on.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the meters while
the hybrid system is not operating, the
power switch is not off.
Exit the vehicle after turning the power
switch off.
When stopping the hybrid sys-
tem with the shift lever in a posi-
tion other than P
NOTICE
■To prevent 12-volt battery discharge
Do not stop the hybrid system when the
shift lever is in a position other than P. If
the hybrid system is stopped in another
shift lever position, the power switch will
not be turned off but instead be turned to
ACCESSORY mode. If the vehicle is left
in ACCESSORY mode, 12-volt battery
discharge may occur.

1894-2. Driving procedures
4
DrivingTurns EV drive mode on/off
When EV drive mode is turned on, the EV
drive mode indicator will come on. Press-
ing the switch when in EV drive mode will
return the vehicle to normal driving (using
the gasoline engine and electric motor
[traction motor]).
■Situations in which EV drive mode can-
not be turned on
It may not be possible to turn EV drive
mode on in the following situations. If it can-
not be turned on, a buzzer will sound and a
message will be shown on the multi-infor-
mation display.
●The temperature of the hybrid system is
high.
The vehicle has been left in the sun, driven on a hill, driven at high speeds, etc.
●The temperature of the hybrid system is
low.
The vehicle has been left in temperatures
lower than about 32°F (0 °C) for a long
period of time, etc.
●The gasoline engine is warming up.
●The hybrid battery (traction battery) is
low.
The remaining battery level indicated in
the “Energy Monitor” display is low.
(
 P.99)
●Vehicle speed is high.
●The accelerator pedal is depressed firmly
or the vehicle is on a hill, etc.
●The windshield defogger is in use.
■Switching to EV drive mode when the
gasoline engine is cold
If the hybrid system is started while the gas-
oline engine is cold, the gasoline engine will
start automatically after a short period of
time in order to warm up. In this case, you
will become unable to switch to EV drive
mode.
After the hybrid system has started and the
“READY” indicator has illuminated, press
the EV drive mode switch before the gaso-
line engine starts to switch to EV drive
mode.
■Automatic cancelation of EV drive
mode
When driving in EV drive mode, the gaso-
line engine may automatically restart in the
following situations. When EV drive mode
is canceled, a buzzer will sound, the EV
drive mode indicator will go off after flash-
ing, and a message is displayed on the
multi-information display.
●The hybrid battery (traction battery)
becomes low.
The remaining battery level indicated in
the “Energy Monitor” display is low.
(  P.99)
●Vehicle speed is high.
●The accelerator pedal is depressed firmly
or the vehicle is on a hill, etc.
EV drive mode
In EV drive mode, electric power is
supplied by the hybrid battery
(traction battery), and only the
electric motor (traction motor) is
used to drive the vehicle.
This mode allows you to drive in res-
idential areas early in the morning
and late at night, or in indoor park-
ing lots, etc., without concern for
noises and gas emissions.
Operating instructions

1904-2. Driving procedures
■Possible driving distance when driving in
EV drive mode
EV drive mode’s possible driving distance
ranges from a few hundred meters to
approximately 0.6 mile (1 km). However,
depending on vehicle conditions, there are
situations when EV drive mode cannot be
used.
(The distance that is possible depends on
the hybrid battery [traction battery] level
and driving conditions.)
■Fuel economy
The hybrid system is designed to achieve
the best possible fuel economy during nor-
mal driving (using the gasoline engine and
electric motor [traction motor]). Driving in
EV drive mode more than necessary may
lower fuel economy.
■If “EV Mode Unavailable” is shown on
the multi-inform ation display
The EV drive mode is not available. The rea-
son the EV drive mode is not available (the
vehicle is idling, batter y charge is low, vehi-
cle speed is higher than the EV drive mode
operating speed range or accelerator pedal
is depressed too much) may be displayed.
Use the EV drive mode when it becomes
available.
■If “EV Mode Deactivated” is shown on
the multi-inform ation display
The EV drive mode has been automatically
canceled. The reason the EV drive mode is
not available (the battery charge is low,
vehicle speed is higher than the EV drive
mode operating speed range or accelera-
tor pedal is depressed too much) may be
displayed. Drive the vehicle for a while
before attempting to turn on the EV drive
mode again.
WARNING
■Caution while driving
When driving in EV drive mode no
engine noise is made. As such, pedestri-
ans, people riding bicycles or other peo-
ple and vehicles in the surrounding area
may not be aware of the vehicle starting
off or approaching them. Therefore, take
extra care while driving even if the
Acoustic Vehicle Alerting System is
active.