LEXUS RX450h 2022 Repair Manual

591-2. Child safety
1
For safety and security
■Laws and regulations pertaining to
anchors
The LATCH system conforms to
FMVSS225 or CMVSS210.2.
Child restraint systems conforming to
FMVSS213 or CMVSS213 specifications
can be used.
This vehicle is designed to conform to SAE
J1819.
WARNING
■When installing a child restraint sys-
tem
Observe the following precautions.
Failure to do so may result in death or
serious injury.
●Firmly attach the top tether strap and
make sure that the belt is not twisted.
●Do not attach the top strap to anything
other than the anchor bracket of the
seat the child restraint system is
installed to.
●Follow all installation instructions pro-
vided by the child restraint system
manufacturer.
●When installing the child restraint sys-
tem with the head restraint being
raised, after the head restraint has
been raised and then the anchor
bracket has been fixed, do not lower
the head restraint.
●When installing a child restraint system
in the rear center seat, adjust both seat
cushions to the same position and
align both seatbacks at the same
angle. The seatbacks must be adjusted
to the same angle. Otherwise, the
child restraint system cannot be
securely restrained and this may cause
death or serious injuries in the event of
sudden braking, sudden swerving or
an accident.
●If the seat is adju sted, reconfirm the
security of the child restraint system.
NOTICE
■Anchor brackets (for top tether
strap)
When not in use, make certain to close
the lid. If it remains open, the lid may be
damaged.

601-3. Lexus Enform
1-3.Lexus Enform
*:If equipped
“SOS” button
LED light indicators
Microphone
Lexus Enform Safety Con-
nect
*
Safety Connect is a subscrip-
tion-based telematics service that
uses Global Positioning System
(GPS) data and embedded cellular
technology to provide safety and
security features to subscribers.
Safety Connect is supported by
Lexus’ designated response center,
which operates 24 hours per day, 7
days per week.
Safety Connect service is available
by subscription on select,
telematics hardware-equipped
vehicles.
By using the Safety Connect ser-
vice, you are agreeing to be bound
by the Telematics Subscription Ser-
vice Agreement and its Terms and
Conditions, as in effect and
amended from time to time, a cur-
rent copy of which is available at
Lexus.com. All use of the Safety
Connect service is subject to such
then-applicable Terms and Condi-
tions.
System components
A
B
C

611-3. Lexus Enform
1
For safety and security
■Certification for Lexus Enform

621-3. Lexus Enform
Subscribers have the following Safety
Connect services available:
Automatic Collision Notification
*
Helps drivers receive necessary response
from emergency service providers.
(  P.63)
*: U.S. Patent No. 7,508,298 B2
 Stolen Vehicle Location
Helps drivers in the event of vehicle theft.
( P.63)
 Emergency Assistance Button
(“SOS”)
Connects drivers to response-center sup-
port. ( P.63)
 Enhanced Roadside Assistance
Provides drivers various on-road assis-
tance. ( P.63)
After you have signed the Telematics
Subscription Service Agreement and
are enrolled, you can begin receiving
services.
A variety of subscription terms is avail-
able for purchase. Contact your Lexus
dealer, call the following or push the
“SOS” button in your vehicle for fur-
ther subscription details.
The United States
1-800-25-LEXUS (1-800-255-3987)
Canada
1-800-26-LEXUS (1-800-265-3987)
Puerto Rico
1-877-539-8777
■Safety Connect Services Information
●Phone calls using the vehicles
Bluetooth® technology will not be possi-
ble during Safety Connect.
ServicesSubscription

631-3. Lexus Enform
1
For safety and security
●Safety Connect is available beginning Fall
2009 on select Lexus models (in the
contiguous United St ates only). Contact
with the Safety Connect response center
is dependent upon th e telematics device
being in operative condition, cellular con-
nection availability, and GPS satellite sig-
nal reception, which ca n limit the ability to
reach the response center or receive
emergency service support. Enrollment
and Telematics Subscription Service
Agreement required. A variety of sub-
scription terms is available; charges vary
by subscription term selected and loca-
tion.
●Automatic Collision Notification, Emer-
gency Assistance and Stolen Vehicle
Location will function in the United
States, including Hawaii and Alaska,
Puerto Rico and in Canada, and
Enhanced Roadside Assistance will func-
tion in the United States, Puerto Rico and
in Canada.
●Automatic Collision Notification, Emer-
gency Assistance, Stolen Vehicle and
Enhanced Road Assistance will not func-
tion in the United States Virgin Islands.
For vehicles first sold in the USVI, no
Safety Connect services will function in
and outside the United States Virgin
Islands.
●Safety Connect services are not subject
to section 255 of the Telecommunica-
tions Act and the device is not TTY com-
patible.
■Languages
The Safety Connect re sponse center will
offer support in mult iple languages. The
Safety Connect system will offer voice
prompts in English, Spanish, and French.
Please indicate your language of choice
when enrolling.
■When contacting the response center
You may be unable to contact the response
center if the network is busy.
When the power switch is turned to
ON mode, the red indicator light
comes on for 2 seconds then turns off.
Afterward, the green indicator light
comes on, indicating that the service is
active.
The following indicator light patterns
indicate specific system usage condi-
tions:
 Green indicator light on = Active
service
 Green indicator light flashing =
Safety Connect call in process
 Red indicator light (except at vehi-
cle start-up) = System malfunction
(contact your Lexus dealer)
 No indicator light (off) = Safety
Connect service not active
■Automatic Collision Notification
In case of either airbag deployment or
severe rear-end collision, the system is
designed to automatically call the
response center. The responding agent
receives the vehicle’s location and
attempts to speak with the vehicle
occupants to assess the level of emer-
gency. If the occupants are unable to
communicate, the agent automatically
treats the call as an emergency, con-
tacts the nearest emergency services
provider to describe the situation, and
requests that assistance be sent to the
Safety Connect LED light Indi-
cators
Safety Connect services

641-3. Lexus Enform
location.
■Stolen Vehicle Location
If your vehicle is stolen, Safety Connect
can work with local authorities to assist
them in locating and recovering the
vehicle. After filing a police report, call
the Safety Connect response center at
1-800-25-LEXUS
(1-800-255-3987) in the United
States, 1-877-539-8777 in Puerto
Rico or 1-800-265- 3987 in Canada,
and follow the prompts for Safety Con-
nect to initiate this service.
In addition to assisting law enforce-
ment with recovery of a stolen vehicle,
Safety-Connect-equipped vehicle
location data may, under certain cir-
cumstances, be shared with third par-
ties to locate your vehicle. Further
information is available at Lexus.com.
■Emergency Assistance Button
(“SOS”)
In the event of an emergency on the
road, push the “SOS” button to reach
the Safety Connect response center.
The answering agent will determine
your vehicle’s location, assess the
emergency, and dispatch the neces-
sary assistance required.
If you accidentally press the “SOS” button,
tell the response-center agent that you are
not experiencing an emergency.
■Enhanced Roadside Assistance
Enhanced Roadside Assistance adds
GPS data to the already included war-
ranty-based Lexus roadside service.
Subscribers can press the “SOS” but-
ton to reach a Safety Connect response-center agent, who can help
with a wide range of needs, such as:
towing, flat tire, fuel delivery, etc. For a
description of the Roadside Assistance
services and their limitations, please
see the Safety Connect Terms and
Conditions, which are available at
Lexus.com.
Important! Read this information about
exposure to radio frequency signals
before using Safety Connect;
The Safety Connect system installed in
your vehicle is a low-power radio trans-
mitter and receiver. It receives and also
sends out radio frequency (RF) signals.
In August 1996, the Federal Commu-
nications Commission (FCC) adopted
RF exposure guidelines with safety lev-
els for mobile wireless phones. Those
guidelines are consistent with the
safety standards previously set by the
following U.S. and international stan-
dards bodies.

ANSI (American National Stan-
dards Institute) C95.1 [1992]
 NCRP (National Council on Radia-
tion Protection and Measurement)
Report 86 [1986]
 ICNIRP (International Commission
on Non-Ionizing Radiation Protec-
tion) [1996]
Those standards were based on com-
prehensive and periodic evaluations of
the relevant scientific literature. Over
Safety information for Safety
Connect

651-3. Lexus Enform
1
For safety and security
120 scientists, engineers, and physi-
cians from universities, and govern-
ment health agencies and industries
reviewed the available body of
research to develop the ANSI Stan-
dard (C95.1).
The design of Safety Connect com-
plies with the FCC guidelines in addi-
tion to those standards.

661-4. Hybrid system
1-4.Hybrid system
■System components
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Front electric motor (traction motor)
Rear electric motor (traction motor)
■When stopped/during start off
The gasoline engine stops
* when the
vehicle is stopped. During start off, the
electric motor (traction motor) drives
the vehicle. At slow speeds or when
traveling down a gentle slope, the
engine is stopped
* and the electric
motor (traction motor) is used. When the shift lever is in N, the hybrid
battery (traction battery) is not being
charged.
*: When the hybrid battery (traction bat-
tery) requires charging or the engine is
warming up, etc. , the gasoline engine will
not automatically stop. ( P.67)
■During normal driving
The gasoline engine is predominantly
Hybrid system features
Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely familiar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric motor
(traction motor) according to driving conditions, improving fuel efficiency and
reducing exhaust emissions.
System components
A
B
C

671-4. Hybrid system
1
For safety and security
used. The electric motor (traction
motor) charges the hybrid battery
(traction battery) as necessary.
■When accelerating sharply
When the accelerator pedal is
depressed heavily, the power of the
hybrid battery (traction battery) is
added to that of the gasoline engine via
the electric motor (traction motor).
■When braking (regenerative brak-
ing)
The wheels operate the electric motor
(traction motor) as a power generator,
and the hybrid battery (traction bat-
tery) is charged.
■Regenerative braking
In the following situations, kinetic energy is
converted to electric energy and decelera-
tion force can be obta ined in conjunction
with the recharging of the hybrid battery
(traction battery).
●The accelerator pedal is released while
driving with the shift lever in D or S.
●The brake pedal is depressed while driv-
ing with the shift lever in D or S.
■EV indicator
The EV indicator comes on when the vehi-
cle is driven using only the electric motor
(traction motor) or the gasoline engine is
stopped.
■Conditions in which the gasoline engine
may not stop
The gasoline engine starts and stops auto-
matically. However, it may not stop auto- matically in the following conditions:
●During gasoline engine warm-up
●During hybrid battery (traction battery)
charging
●When the temperature of the hybrid bat-
tery (traction battery) is high or low
●When the heater is switched on
Depending on the circumstances, the gaso-
line engine may also not stop automatically
in other situations.
■Charging the hybrid battery (traction
battery)
As the gasoline engine charges the hybrid
battery (traction battery), the battery does
not need to be charged from an outside
source. However, if the vehicle is left parked
for a long time the hybrid battery (traction
battery) will slowly discharge. For this rea-
son, be sure to drive the vehicle at least
once every few months for at least 30 min-
utes or 10 miles (16 km). If the hybrid bat-
tery (traction battery) becomes fully
discharged and you are unable to start the
hybrid system, contact your Lexus dealer.
■Charging the 12-volt battery
P.441
■After the 12-volt battery has discharged
or when the terminal has been removed
and installed during exchange, etc.
The gasoline engine may not stop even if
the vehicle is being driven by the hybrid bat-
tery (traction battery). If this continues for a
few days, contact your Lexus dealer.
■Sounds and vibrations specific to a
hybrid vehicle
There may be no engine sound or vibration
even though the vehicle is able to move with
the “READY” indicator is illuminated. For
safety, apply the parking brake and make
sure to shift the shift lever to P when parked.
The following sounds or vibrations may
occur when the hybrid system is operating
and are not a malfunction:
●Motor sounds may be heard from the
engine compartment.
●Sounds may be heard from the hybrid
battery (traction battery) behind the rear

681-4. Hybrid system
seats when the hybrid system starts or
stops.
●Relay operating sounds such as a snap or
soft clank will be emitted from the hybrid
battery (traction battery), behind the rear
seats, when the hybrid system is started
or stopped.
●Sounds from the hybrid system may be
heard when the back door is open.
●Sounds may be heard from the transmis-
sion when the gasoline engine starts or
stops, when driving at low speeds, or
during idling.
●Engine sounds may be heard when
accelerating sharply.
●Sounds may be heard due to regenera-
tive braking when the brake pedal is
depressed or as the accelerator pedal is
released.
●Vibration may be felt when the gasoline
engine starts or stops.
●Cooling fan sounds may be heard from
the air intake vents under the rear seats.
■Maintenance, repair, recycling, and dis-
posal
Contact your Lexus dealer regarding main-
tenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.
■Customization
Some functions can be customized.
(  P.472)
When driving with the gasoline engine
stopped, a sound, which changes in
accordance with the driving speed, will
be played in order to warn people
nearby of the vehicle’s approach. This
sound may be heard inside the vehicle.
The sound will stop when the vehicle
speed exceeds approximately 22 mph
(35 km/h).
■Acoustic Vehicle Alerting System
In the following cases, the Acoustic Vehicle
Alerting System may be difficult for sur-
rounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the Acoustic Vehicle Alerting Sys-
tem is installed on the front of the vehicle, it
may be more difficult to hear from the rear
of the vehicle compared to the front.
Acoustic Vehicle Alerting Sys-
tem