ECU Lexus ES300h 2020 Owner's Guide

491-2. Child safety
1
For safety and security
■Child restraint LATCH anchors
LATCH anchors are provided for the
outboard rear seat. (Marks displaying
the location of the anchors are
attached to the seats.)
WARNING
■When installing a child restraint sys-
tem
Observe the following precautions.
Failure to do so may result in death or
serious injury.
●Do not allow children to play with the
seat belt. If the seat belt becomes
twisted around a child’s neck, it may
lead to choking or other serious inju-
ries that could result in death.
If this occurs and the buckle cannot be
unfastened, scissors should be used to
cut the belt.
●Ensure that the belt and plate are
securely locked and the seat belt is not
twisted.
●Shake the child restraint system left
and right, and forward and backward
to ensure that it has been securely
installed.
●After securing a child restraint system,
never adjust the seat.
●When a booster seat is installed,
always ensure that th e shoulder belt is
positioned across the center of the
child’s shoulder. The belt should be
kept away from the child’s neck, but
not so that it could fall off the child’s
shoulder.
●Follow all installation instructions pro-
vided by the child restraint system
manufacturer.
●When securing some types of child
restraint systems in rear seats, it may
not be possible to properly use the
seat belts in position s next to the child
restraint without interfering with it or
affecting seat belt effectiveness. Be
sure your seat belt fits snugly across
your shoulder and low on your hips. If it
does not, or if it interferes with the
child restraint, move to a different posi-
tion. Failure to do so may result in
death or serious injury.
■When installing a booster seat
To prevent the belt from going into ALR
lock mode, do not fu lly extend the shoul-
der belt. ALR mode causes the belt to
tighten only. This could cause injury or
discomfort to the child. ( P.26)
■Do not use a seat belt extender
If a seat belt extender is used when
installing a child restra int system, the seat
belt will not securely hold the child
restraint system, which could cause
death or serious injury to the child or
other passengers in the event of sudden
braking, sudden swerving or an accident.
Child restraint system fixed with
a child restraint LATCH anchor

511-2. Child safety
1
For safety and security
tem indicates the presence of a
lower connector system.
Canada only
3
If the child restraint has a top tether
strap, follow the child restraint man-
ufacturer’s operation manual
regarding the installation, using the
top tether strap to latch onto the
top tether strap anchor. ( P.51)
4
After installing the child restraint
system, rock it back and forth to
ensure that it is installed securely.
( P.49)
■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.
■Anchor brackets (for top tether
strap)
Anchor brackets are provided for each
rear seat.
Use anchor brackets when fixing the
top tether strap.
A
A
WARNING
■When installing a child restraint sys-
tem
Observe the following precautions.
Failure to do so may result in death or
serious injury.
●When using the LATCH anchors, be
sure that there are no foreign objects
around the anchors and that the seat
belt is not caught behind the child
restraint system.
●Follow all installation instructions pro-
vided by the child restraint system
manufacturer.
●When securing some types of child
restraint systems in rear seats, it may
not be possible to properly use the
seat belts in position s next to the child
restraint without interfering with it or
affecting seat belt effectiveness. Be
sure your seat belt fits snugly across
your shoulder and low on your hips. If it
does not, or if it interferes with the
child restraint, move to a different posi-
tion. Failure to do so may result in
death or serious injury.
●If the seat is adjusted, reconfirm the
security of the child restraint system.
Using an anchor bracket (for top
tether strap)

521-2. Child safety
Outboard rear seatsAnchor brackets
Top tether strap
Rear center seatAnchor bracket
Top tether strap
■Fixing the top tether strap to the
anchor bracket
Install the child restraint system in
accordance to the operation manual
enclosed with the child restraint sys-
tem. 1
Remove the head restraint.
2 Open the anchor bracket cover,
latch the hook onto the anchor
bracket and tighten the top tether
strap.
Make sure the top tether strap is securely
latched. ( P.49)
Outboard rear seats
Hook
Top tether strap
Rear center seatHook
A
B
A
B
A
B
A

531-2. Child safety
1
For safety and security
Top tether strap
■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 tether strap to
anything other than the anchor
bracket.
●After securing a child restraint system,
never adjust the seat.
●Follow all installation instructions pro-
vided by the child restraint system
manufacturer.
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.
B

541-3. Lexus Enform
1-3.Lexus Enform
*:If equipped
“SOS” button
LED light indicators
Microphone
Lexus Enform Safety Con-
nect*
Safety Connect is a subscription-
based telematics service that uses
Global Positioning System (GPS)
data and embedded cellular tech-
nology to provide safety and secu-
rity 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, telemat-
ics 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

551-3. Lexus Enform
1
For safety and security
■Certification for Lexus Enform
Subscribers have the following Safety
Connect services available:
Automatic Collision Notification
*
Helps drivers receive necessary response
from emergency service providers. (

P.57)
*: U.S. Patent No. 7,508,298 B2
 Stolen Vehicle Location
Helps drivers in the event of vehicle theft.
(
P.57)
 Emergency Assistance Button
(“SOS”)
Services

571-3. Lexus Enform
1
For safety and security
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 ag ent 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
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 Connect 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
Safety Connect services
Safety information for Safety
Connect

591-3. Lexus Enform
1
For safety and security
when operating Lexus Enform Remote.
In some states, use of Lexus Enform
Remote may violate state or local laws.
Before using Lexus Enform Remote,
check your state and local laws.
●Any malfunction of the Lexus should be
repaired by your Lexus dealer.
●Lexus Enform Remote is designed to
work at temperatures above -22°F (-
30°C). This specification is related to the
Lexus Enform Remote operation, but is
dependent on the vehicle’s operating
temperature range which may be differ-
ent.
●Content is subject to change without
notice.
●Some features of the Lexus Enform
Remote may not be available on some
models.
●Additional information can be found at
www.lexus.com/enform/.
●Availability of func tions of the Lexus
Enform service is de pendent on network
reception level.
■Safety information for Lexus Enform
Remote
Refer to the safety information for Safety
Connect: P.57
*: If equipped
■Availability of service
Lexus Enform Service Connect is not avail-
able in some countries or areas.
■Lexus Enform Serv ice Connect Infor-
mation
Availability of functions of the Lexus Enform
Service Connect is dependent on network
reception level.
■Safety information for Lexus Enform
Service Connect
Refer to the safety information for Safety
Connect: P.57
Lexus Enform Service Con-
nect
*
Lexus Enform Service Connect
uses DCM (Data Communication
Module) to collect and transmit
vehicle data that allows Lexus to
provide:
 Vehicle Health Report (VHR)
(Safety Recalls, Service Cam-
paigns, Current Vehicle Alerts,
Required Maintenance, and Vehi-
cle Condition Status)
 Maintenance Notifications
 Vehicle Alert Notifications
For details about this service and
how to register, refer to
http://www.lexus.com/enform/
.
The Lexus Enform Service Con-
nect is achieved by using a DCM
built in the vehicle.

611-4. Hybrid system
1
For safety and security
■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 th e 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
gasoline engine may also not stop auto-
matically 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.392
■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
seats when the hybrid system starts or
stops.
●Relay operating sounds such as a snap or

631-4. Hybrid system
1
For safety and security
The illustration is an example for explanation and may differ from the actual item.
Warning label
Service plug
Hybrid battery (traction battery)
High voltage cables (orange)
Electric motor (traction motor)
Power control unit
Air conditioning compressor
■Running out of fuel
When the vehicle has run out of fuel and the
hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to
make the low fuel level warning light
(  P.367) go off. If there is only a small
amount of fuel, the hybrid system may not
be able to start. (The standard amount of fuel is about 2.4gal. [9.0 L, 2.0 Imp.gal.],
when the vehicle is on a level surface. This
value may vary when the vehicle is on a
slope. Add extra fuel when the vehicle is
inclined.)
■Electromagnetic waves
●High voltage parts and cables on hybrid
vehicles incorporate electromagnetic
Hybrid system precautions
Take care when handling the hybrid system,
as it is a high voltage system (about
650 V at maximum) as well as contains parts that become extremely hot when
the hybrid system is operating. Obey th e warning labels attached to the vehi-
cle.
System components
A
B
C
D
E
F
G