battery LEXUS RX450H 2020 User Guide

1423-2. Opening, closing and locking the doors
RX350/RX350L_U
WARNING
■Back door closer
●Use caution when using the back door closer as it still operates when the power back
door system is disabled.
■Power back door
Observe the following precautions wh en operating the power back door.
Failure to do so may cause death or serious injury.
●Check the safety of the surrounding area to make sure there are no obstacles or any-
thing that could cause any of yo ur belongings to get caught.
●If anyone is in the vicinity, make sure they are safe and let them know that the power
back door is about to open or close.
●If the power back door system is disabled ( P. 101) while the power back door is
operating, the power back door will stop operating. The power back door must then
be operated manually. Take extra care in th is situation, as the power back door may
open or close suddenly.
●If the operating conditions of the power back door ( P. 135) are no longer met, a
buzzer may sound and the power back door may stop opening or closing. The power
back door must then be operated manually. Ta ke extra care on an incline in this situa-
tion, as the power back door may move suddenly.
●On an incline, the power back door may su ddenly shut after it opens. Make sure the
power back door is fully open and secure.
●In the following situations, the power back door may detect an abnormality and auto-
matic operation may be stopped. In this case, the power back door must then be
operated manually. Take extra care in this situation, as the stopped power back door
may suddenly open or close, causing an accident.
• When the power back door contacts an obstacle
• When the battery voltage suddenly drops, such as when the engine switch is turned to IGNITION ON mode or the engine is started during automatic opera-
tion
●In the event that the power back door is left
slightly open, the back door closer will auto-
matically close it to the fully closed position. It
takes several seconds before the back door
closer begins to operate. Be careful not to get
fingers caught or anything else in the power
back door, as this may cause bone fractures
or other serious injuries.

1473-2. Opening, closing and locking the doors
3
Operation of each component
RX350/RX350L_U
■Alarms and warning messages
A combination of exterior and interior alar ms as well as warning messages shown on the
multi-information display are used to prevent theft of the vehicle and accidents resulting
from erroneous operation. Take appropriate measures in response to any warning mes-
sage on the multi-information display. ( P. 661)
When only an alarm sounds, circumstances and correction procedures are as follows.
■If a warning message is displayed indicating that there is a malfunction in the smart
access system with push-button start
 P. 661
■Battery-saving function
The battery-saving function w ill be activated in order to prevent the electronic key bat-
tery and the battery from being discharged while the vehicle is not in operation for a long
time.
●In the following situations, the smart acce ss system with push-button start may take
some time to unlock the doors.
• The electronic key has been le ft 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-button st art has not been used for 5 days or lon-
ger.
●If the smart access system with push-button start has not been used for 14 days or lon-
ger, the doors cannot be unlocked at any doors except the driver’s door. In this case,
take hold of the driver’s d oor handle, or use the wireless remote control or the mechan-
ical key, to unlock the doors.
AlarmSituationCorrection procedure
Exterior alarm
sounds once for 5
secondsAn attempt was made to lock
the vehicle while a door was
open.Close all of the doors and
lock the doors again.
Interior alarm pings
repeatedly
The engine switch was turned to
ACCESSORY mode while the
driver’s door was open (The
driver’s door was opened when
the engine switch was in
ACCESSORY mode).
Turn the engine switch off
and close the driver’s door.

1483-2. Opening, closing and locking the doors
RX350/RX350L_U
■Electronic Key battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping the elec-
tronic key from re ceiving radio waves.
■Conditions affecting operation
The smart access system with push-button start, wireless remote control and engine
immobilizer system use weak radio waves. In the following situations, the communication
between the electronic key and the vehicle ma y be affected, preventing the smart access
system with push-button star t, wireless remote control and engine immobilizer system
from operating properly. (Ways of coping: P. 684)
●When the electronic key battery is depleted
●Near a TV tower, electric power plant, gas st ation, radio station, large display, airport or
other facility that generates strong radio wave s or electrical noise
●When the electronic key is in contact with, or is covered by the following metallic
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, cordle ss phone or other wireless communication
devices
• Another vehicle’s electronic key, another electronic key of your vehicle, or a wireless
key that emits radio waves
• Personal computers or person al digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or me tallic objects are attached to the rear win-
dow
●When the electronic key is placed near a battery charger or electronic devices
●When the vehicle is parked in a pay parking spot where radio waves are emitted
Press twice while pressing and holding .
Confirm that the electronic key indicator 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.

1493-2. Opening, closing and locking the doors
3
Operation of each component
RX350/RX350L_U
■Note for the entry function
●Even when the electronic key is within the effective range (detection areas), the system
may not operate properly in the following cases:
• The electronic key is too close to the window 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 th e instrument panel, luggage co mpartment, floor, or in the
door pockets or glove box when the engine is started or engine switch modes are
changed.
●Do not leave the electronic key on top of th e 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 outs ide 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 th e 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 engine
if the electronic key is near the window.
●The doors may unlock if a large amount of wa ter 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 approx imately 60 seconds if the doors are not
opened and closed.)
●If the wireless remote control is used to lo ck the doors when the electronic key is near
the vehicle, there is a possibility that the d oor may not be unlocked by the entry func-
tion. (Use the wireless remote control to unlock the doors.)
●Touching the door lock sensor while wearin g gloves may delay or prevent lock opera-
tion. 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 el ectronic key is within the effective range,
the door may lock and unlock repeatedly. In that case, follow the following 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. 148)
●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 mult i-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 de tection area, it may take slightly longer to
unlock the doors after the door handle is gripped.

1503-2. Opening, closing and locking the doors
RX350/RX350L_U
●Fingernails may scrape against the door duri ng operation of the door handle. Be care-
ful not to injure fingernails or damage the surface of the door.
*: This setting can be customiz ed at your Lexus dealer.
■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 system with push-button start can be deactivated in advance.
(  P. 722)
●Setting the electronic key to battery-saving mode helps to reduce key battery deple-
tion. ( P. 148)
■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 prevention may not operate.)
■If the smart access system with push-button start does not operate properly
●Locking and unlocking the doors: Use the mechanical key. (P. 684)
●Starting the engine: P. 685
■Customization
Some functions can be customized. ( P. 722)
■If the smart access system with push-button start has been deactivated in a customized
setting
●Locking and unlocking the doors:
Use the wireless remote cont rol or mechanical key. (P. 124, 130, 684)
●Starting the engine and changing engine switch modes: P. 685
●Stopping the engine: P. 231

1893-5. Opening, closing the windows and moon roof
3
Operation of each component
RX350/RX350L_U
■Door lock linked window operation
●The power windows can be opened and closed using the mechanical key.* ( P. 685)
●The power windows can be opened using the wireless remote control.* (P. 124)
*: These settings must be cust omized at your Lexus dealer.
■Alarm
The alarm may be triggered if the alarm is set and a power window is closed using the
door lock linked power window operation function. ( P. 77)
■When the battery is disconnected
The window lock switch is disabled. If necessary, press the window lock switch after
reconnecting the battery.
■Power windows open warning buzzer
A buzzer sounds and a message is shown on the multi-information display in the instru-
ment cluster when the engine switch is turned off and the driver’s door is opened with the
power windows open.
■Customization
Some functions can be customized. ( P. 722)

2334-2. Driving procedures
4
Driving
RX350/RX350L_U
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION ON
mode (with the engine not running) for more than an hour with the shift lever in P, the
engine switch will automatically turn off. However, this function cannot entirely prevent
battery discharge. Do not leave the vehicle with the engine switch in ACCESSORY or
IGNITION ON mode for long periods of time when the engine is not running.
■Electronic key battery depletion
P. 122
■Conditions affe cting operation
 P. 148
■Note for the entry function
P. 149
■If the engine does not start
●The engine immobilizer system ma y not have been deactivated. (P. 74)
Contact your Lexus dealer.
●Check that the shift lever is se curely set in P. The engine may not start if the shift lever is
displaced out of P. “To Start Vehicle, Put Sh ift Lever into P” will be displayed on the
multi-information display.
■Steering lock
After turning the engine switch off and opening and closing the doors, the steering wheel
will be locked due to the steering lock func tion. Operating the engine switch again auto-
matically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor may be sus-
pended if the engine is turned on and off repeat edly in a short period of time. In this case,
refrain from operating the engine switch. After about 10 seconds, the steering lock
motor will resume functioning.
■When “Access System with Elec. Key Malf unction See Owner’s Manual” is displayed
on the multi-information display
The system may be malfunctio ning. Have the vehicle inspected by your Lexus dealer
immediately. “Steering Wheel Lock Press Engine Switch
while Turning Wheel” w ill be displayed on the
multi-information display.
Check that the shift leve r is in P. Press the
engine switch shortly and firmly while turning
the steering wheel left and right.

2344-2. Driving procedures
RX350/RX350L_U
■If the electronic key battery is depleted
 P. 623
■Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine switch mode may not change
or the engine may not start.
●If attempting to restart the engine immediately after turning the engine switch off, the
engine may not start in some cases. After turning the engine switch off, please wait a
few seconds before restarting the engine.
■If the smart access system wi th push-button start has been deactivated by a customized
setting
 P. 684
WARNING
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the accelerator
pedal while starting the engine under any circumstances.
Doing so may cause an accident resu lting in death or serious injury.
■Caution while driving
If engine 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 cir-
cumstance may lead to an accident, re sulting in death or serious injury.
■Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and hold
the engine switch for more than 2 seconds, or press it briefly 3 times or more in succes-
sion. ( P. 645)
However, do not touch the engi ne switch while driving except in an emergency. Turning
the engine off while driving will not cause lo ss of steering or braking control, but the
power assist to these systems will be lost. Th is will make it more difficult to steer and
brake, so you should pull over and stop the vehicle as soon as it is safe to do so.

2354-2. Driving procedures
4
Driving
RX350/RX350L_U
NOTICE
■To prevent battery discharge
●Do not leave the engine switch in ACCESSORY or IGNITION ON mode for long
periods of time without the engine running.
●If “ACCESSORY” or “IGNITION ON” is displa yed on the meters while the engine is
not running, the engine switch is not off. Exit the vehicle after turning the engine
switch off.
●Do not stop the engine when the shift lever is in a position other than P. If the engine is
stopped in another shift lever position, the engine switch will not be turned off but
instead be turned to ACCESSORY mode. If the vehicle is left in ACCESSORY
mode, battery discharge may occur.
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have your vehicle checked
by your Lexus dealer immediately.
■Symptoms indicating a malfun ction with the engine switch
If the engine switch seems to be operating somewhat differen tly than usual, such as the
switch sticking slightly, ther e may be a malfunction. Contact your Lexus dealer immedi-
ately.

2554-3. Operating the lights and wipers
4
Driving
RX350/RX350L_U
■Welcome lighting
If the headlight switch is turned to and the surrounding area is dark, unlocking the
doors using the smart access system with pu sh-button start or wireless remote control
will turn the parking lights and tail lights on automatically.
■Windshield wiper linked headlight illumination
When driving during daytime with the headlight switch turned to , if the windshield
wipers are used, the headlights will turn on automatically after several seconds to help
enhance the visibility of your vehicle.
■Battery-saving function
In order to prevent the battery of the vehicle from discharging, if the headlights and/or tail
lights are on when the engine switch is turned off the battery saving function will operate
and automatically turn off all the lights after approximately 20 minutes. When the engine
switch is turned to IGNITION ON mode, the battery-saving function will be disabled.
When any of the following are performed, th e battery-saving function is canceled once
and then reactivated. All the lights will turn off automatically 20 minutes after the bat-
tery-saving function has been reactivated:
●When the headlight switch is operated
●When a door is opened or closed
■Customization
Some functions can be customized. ( P. 722)
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is off.