2022 LEXUS RX450h change key battery

1103-2. Opening, closing and locking the doors
To prevent unintended triggering of the
alarm, unlock the doors using the wireless
remote control and open and close a door
once after the settings have been changed.
(If a door is not opened within 60 seconds
after is pressed, the doors will be
locked again and the alarm will automati-
cally be set.)
In a case that the alarm is triggered, imme-
diately stop the alarm. (P.74)
■Impact detection door lock release sys-
tem
In the event that the vehicle is subject to a
strong impact, all the doors are unlocked.
Depending on the force of the impact or the
type of accident, however, the system may
not operate.
■Operation signals
Doors:
A buzzer sounds and the emergency flash-
ers flash to indicate that the doors have
been locked/unlocke d. (Locked: Once;
Unlocked: Twice)
Windows and moon roof or panoramic
moon roof:
A buzzer sounds.
■Security feature
If a door is not opened within approximately
60 seconds after the vehicle is unlocked,
the security feature automatically locks the
vehicle again.
■When the door cannot be locked by the
lock sensor on the surface of the door
handle
When the door cannot be locked even if the
lock sensor on the surface of the door han-
dle is touched by a finger, touch the lock
sensor with the palm.
When gloves are being worn, remove the
gloves.
■Door lock buzzer
If an attempt to lock the doors using the
smart key system is made when a door is
not fully closed, a buzzer will sound continu-
ously for 5 seconds. Fully close the door to
stop the buzzer, and lock the doors again.
■Setting the alarm
Locking the doors will set the alarm system.
( P.74)
■Conditions affecting the operation of
the smart access system with push-but-
ton start or wireless remote control
P.126
■If the smart access system with
push-button start or the wireless remote
control does not operate properly
Use the mechanical key to lock and unlock
the doors. (P.439)
Replace the key battery with a new one if it
is depleted. ( P.386)
■If the 12-volt batte ry is discharged
The doors cannot be locked and unlocked
using the smart access system with
push-button start or wireless remote con-
trol. Lock or unlock the doors using the
Multi-information display/BeepUnlocking function
Exterior: Beeps 3 times
Interior: Pings once
Holding the driver’s
door handle unlocks
only the driver’s
door.
Holding any of the
passenger door
handles unlocks all
the doors.
Exterior: Beeps twice
Interior: Pings once
Holding a door han-
dle unlocks all the
doors.

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 em its 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 radi o 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 ra dio 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 electronic 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 el ectronic 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

1834-2. Driving procedures
4
Driving
with push-button start. Refer to P.440to
start the hybrid system. However, if the
electronic key is carried inside the vehicle
and the doors are locked ( P.111), the
hybrid system can be started.
■When the ambient temperature is low,
such as during winter driving conditions
When starting the hybrid system, the flash-
ing 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.67
■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 locked 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 lever 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 re
peatedly in a short
period of time. In th is case, refrain from
operating the hybrid system. After about
10 seconds, the steeri ng lock motor will
resume functioning.
■When “Access System with Elec. Key
Malfunction See Owner’s Manual” is
displayed on the multi-information dis-
play
The system may be malfunctioning. Have
the vehicle inspected by your Lexus dealer
immediately.
■If the “READY” indica tor 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.386
■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 deactiva ted in a customized
setting, refer to P.439.
WARNING
■When starting the hybrid system
Always start the hybr id 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.

4237-2. Steps to take in an emergency
7
When trouble arises
nance is performed. (P.356)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■If “Maintenance Required Visit Your
Dealer” is displayed (U.S.A. only)
Indicates that all maintenance is required to
correspond to the driven distance on the
maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message ha s been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.356)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■If “Oil Maintenance Required Soon” is
displayed
Indicates that the en gine oil should be
scheduled to be changed.
Check the engine oil and change it if neces-
sary. After changing the engine oil, make
sure to reset the message. ( P.367)
■If “Oil Maintenance Required” is dis-
played
Indicates that the en gine oil should be
changed.
Check and change the engine oil, and oil fil-
ter by your Lexus deal er. After changing the
engine oil, make sure to reset the message.
(  P.367)
■If a message that in dicates the need for
visiting your Lexus dealer is displayed
The system or part shown on the
multi-information display is malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■If a message that in dicates the need for
referring to Owner’s Manual is dis-
played
●“Engine Coolant Temp High” is shown on the multi-information display, follow the
instructions. (
P.446)
●If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malf unction. Have the
vehicle inspected by your Lexus dealer
immediately.
• “Access System with Elec. Key Malfunc-
tion”
• “Hybrid System Malfunction”
•“Check Engine”
• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction”
●If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malfun ction. Immediately
stop the vehicle and contact your Lexus
dealer.
• “Braking Power Low”
• “Charging Syst em Malfunction”
• “Oil Pressure Low”
NOTICE
■If “High Power Consumption Partial
Limit On AC/Heater Operation” is
displayed frequently
There is a possible malfunction relating
to the charging system or the 12-volt bat-
tery may be deteriorating. Have the vehi-
cle inspected by your Lexus dealer.

4417-2. Steps to take in an emergency
7
When trouble arises
When the smart access system with
push-button start is deactivated in
customization setting, the power switch will
turn to ACCESSORY mode.
3Firmly depress the brake pedal and
check that is shown on the
multi-information display.
4 Press the power switch shortly and
firmly.
In the event that the hybrid system still
cannot be started, contact your Lexus
dealer.
■Stopping the hybrid system
Shift the shift lever to P, set the parking
brake, and press the power switch as you
normally do when stopping the hybrid sys-
tem.
■Replacing the key battery
As the above procedure is a temporary
measure, it is recommended that the elec-
tronic key battery be replaced immediately
when the battery is depleted. ( P.386)
■Alarm (For Canada)
Using the mechanical key to lock the doors
will not set the alarm system.
If a door is unlocked using the mechanical
key when the alarm system is set, the alarm
may be triggered. ( P.74)
■Changing power switch modes
Release the brake pedal and press the
power switch in step 3 above. The hybrid
system does not start and modes will be
changed each time the switch is pressed.
(  P.185)
If the 12-volt battery is dis-
charged
The following procedures may be
used to start the hybrid system if the
vehicle’s 12-volt battery is dis-
charged.
You can also call your Lexus dealer
or a qualified repair shop.

507Alphabetical Index
Dimension ...................................................... 452
Dinghy towing.................................................. 181
DisplayCenter Display............................................ 294
Dynamic radar cruise control with full-speed range ...................................... 236
Energy monitor.............................................. 99
Head-up display ........................................... 95
Intuitive parking assist.............................. 252
LTA (Lane Tracing Assist).................... 230
Multi-information display ..........................88
RCTA .............................................................. 259
Warning message..................................... 420
Distance until next engine oil change .... 87
Do-it-yourself maintenance .................... 357
Door courtesy lights .....................................315 Wattage..........................................................460
Door lock Power back door.......................................... 113
Side doors ...................................................... 109
Smart access system with push-button start .................................................................. 125
Wireless remote control..........................107
Door pockets ................................................ 322
Doors Automatic door lock ing and unlocking
system ..............................................................112
Door glasses ................................................... 151
Door lock warning buzzer ...................... 110
Open door warning buzzer ....................112
Outside rear view mirrors ..................... 148
Rear door child-protectors ......................112
Side doors ...................................................... 109
Drive distance .................................................. 90
Driver’s seat position memory Driving position memory........................ 140
Memory recall function ..............................141
Power easy access system .................... 140
Drive-start control ........................................163
Driving Break-in tips ...................................................163
Correct driving posture ............................ 25 Driving mode select switch .................. 276
Hybrid vehicle driving tips ....................284
Procedures .....................................................162
Winter drive tips ........................................ 286
Driving assist system information ............ 92
Driving information display ........................ 90
Driving position memory........................... 140 Memory recall function.............................. 141
Power easy access system .................... 140
Driving range ................................................... 90
Dynamic radar cruise control with full-speed range ........................................ 236 Warning message ..................................... 244
E
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 278
EDR (Event data recorder) ........................... 8
E-Four .............................................................. 279
Elapsed time ..................................................... 90
Electric motor (traction motor) ................ 66
Electric Power Steering (EPS) .............. 279 Warning light .................................................413
Electronic key ................................................ 106 Battery-saving function.............................126
If the electronic key does not operate properly .......................................................439
Replacing the battery .............................. 386
Electronic sunshade Jam protection function ............................157
Operation ....................................................... 156
Electronically Controlled Brake System (ECB) ............................................................ 278
Emergency flashers .................................... 402
Emergency, in case of If a warning buzzer sounds.................... 410
If a warning light turns on........................ 410
If a warning message is displayed.....420
If the 12-volt battery is discharged ......441
If the electronic key does not operate properly .......................................................439