2019 Lexus ES300h ECU

3657-2. Steps to take in an emergency
7
When trouble arises
■Brake hold operated indicator (warning buzzer)
Hybrid system overheat warning light
* (warning buzzer)■
*: This light illuminates on the multi-information display.
■Master warning light (warning buzzer)
■Warning buzzer
In some cases, the bu zzer may not be heard
due to being in a noisy location or audio
sound.
■Front passenger detection sensor, seat
belt reminder and warning buzzer
●If luggage is placed on the front passen-
ger seat, the front passenger detection
sensor may cause th e warning light to
flash and the warning buzzer to sound
even if a passenger is not sitting in the
seat.
●If a cushion is placed on the seat, the sen-
sor may not detect a passenger, and the
warning light may not operate properly.
■SRS warning light
This warning light system monitors the air-
bag sensor assembly, fr ont impact sensors,
side impact sensors (front door), side
impact sensors (front), side impact sensors (rear), driver’s seat position sensor, driver’s
seat belt buckle sw
itch, front passenger
occupant classificatio n system (ECU and
sensors), “AIR BAG ON” indicator light,
“AIR BAG OFF” indicator light, front pas-
senger’s seat belt buckle switch, seat belt
pretensioners, airbags, interconnecting wir-
ing and power sources. ( P.28)
■If the malfunction indicator lamp comes
on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer as soon as
possible.
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the brake hold system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the hybrid system has overheated
This light may be displayed when dr iving under severe operating condi-
tions. (For example, when driving up a long steep hill.)
 Immediately stop the vehicle in a safe place and check the hybrid
system. ( P.388)
Warning lightDetails/Actions
A buzzer sounds and the warning ligh t comes on and flashes to indicate
that the master warning system has detected a malfunction.
 P.368

3747-2. Steps to take in an emergency
1Open the trunk.
2
Pull the lever upwards when lifting
the luggage mat up.
3
The lever can be hooked on the
edge of the trunk.
4
Remove the jack. 1
Remove the auxiliary box.
2
Loosen the center fastener that
secures the spare tire.
WARNING
●When lowering the vehicle, make sure
that there is no-one near the vehicle. If
there are people nearby, warn them
vocally before lowering.
Taking out the jack
NOTICE
■To prevent damage to luggage mat
When closing the trunk door, do not
leave the luggage mat lever hooked on
the edge of the trunk.
Taking out the spare tire
WARNING
■When storing the spare tire
Be careful not to catch fingers or other
body parts between the spare tire and
the body of the vehicle.

3787-2. Steps to take in an emergency
WARNING
●Do not use more than one compact
spare tire simultaneously.
●Replace the compact spare tire with a
standard tire as soon as possible.
●Avoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
■When the compact spare tire is
attached
The vehicle speed may not be correctly
detected, and the following systems may
not operate correctly:
• ABS & Brake assist
• VSC
• TRAC
• Dynamic radar cruise control with full- speed range
• PCS (Pre-Collision System)
• EPS
• LTA (Lane Tracing Assist)
• Panoramic view monitor (if equipped)
• Lexus parking assist monitor (if equipped)
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• BSM (Blind spot monitor) (if equipped)
• Automatic high Beam
■Speed limit when using the compact
spare tire
Do not drive at speeds in excess of 50
mph (80 km/h) when a compact spare
tire is installed on the vehicle.
The compact spare tire is not designed
for driving at high speeds. Failure to
observe this precaution may lead to an
accident causing deat h or serious injury.
■After using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.
NOTICE
■Be careful when driving over bumps
with the compact spare tire installed
on the vehicle
The vehicle becomes lower when driving
with the compact spar e tire compared to
when driving with standard tires. Be
careful when driving over uneven road
surfaces.
■Driving with tire chains and the com-
pact spare tire
Do not fit tire chains to the compact
spare tire.
Tire chains may damage the vehicle body
and adversely affect driving perfor-
mance.
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pr essure warning valve
and transmitter, contact your Lexus
dealer as the tire pressure warning valve
and transmitter may be damaged if not
handled correctly.

3867-2. Steps to take in an emergency
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■When the 12-volt battery is removed or
discharged
●Information stored in the ECU is cleared.
When the 12-volt battery is depleted,
have the vehicle inspected at your Lexus
dealer.
●Some systems may require initialization.
( P.423)
■When removing the 12-volt battery ter-
minals
When the 12-volt battery terminals are
removed, the information stored in the
ECU is cleared. Before removing the 12-
volt battery terminals, contact your Lexus
dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery
will discharge gradua lly even when the
vehicle is not in use, due to natural dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
■When recharging or replacing the 12-
volt battery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
12-volt battery is discharged. Use the
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The hybrid system may not start on the
first attempt after the 12-volt battery has
recharged but will start normally after the
second attempt. This is not a malfunction.
●The power switch mode is memorized by
the vehicle. When the 12-volt battery is
reconnected, the system will return to the
mode it was in before the 12-volt battery
was discharged. Before disconnecting
the 12-volt battery, turn the power switch
off.
If you are unsure what mode the power switch was in before
the 12-volt battery
discharged, be especially careful when
reconnecting the 12-volt battery.
■When replacing the 12-volt battery
●Use a 12-volt battery that conforms to
European regulations.
●Use a 12-volt battery that the case size is
same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent
(60Ah) or greater, and performance rat-
ing (CCA) is equivalent (345A) or
greater.
• If the sizes differ, the 12-volt battery can- not be properly secured.
• 12-volt battery performance may decrease and the hybrid system may not
be able to start.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and hybrid system may
not be able to start.
●Use a 12-volt battery with a handle. If a
12-volt battery without a handle is used,
removal is more difficult.
●After exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before exchanging.
• Use the exhaust hole plug included with the 12-volt battery exchanged or the one
installed on the battery prior to the
exchange. (Depending on the 12-volt
battery to be exchanged, the exhaust
hole may be plugged.)

3887-2. Steps to take in an emergency
If the engine coolant temperature
gauge enters the red zone or
“Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information
display
1
Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the hybrid system.
2
If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
WARNING
■When exchanging the 12-volt battery
●When the vent plug and indicator are
close to the hold down clamp, the bat-
tery fluid (sulfuric acid) may leak.
●After exchanging, securely attach the
exhaust hose and exhaust hole plug to
the exhaust hole of the exchanged 12-
volt battery. If not properly installed,
gases (hydrogen) may leak into the
vehicle interior, and there is the possi-
ble danger of the gas igniting and
exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fan or engine drive
belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to
be used when charging the 12-volt bat-
tery from another vehicle in an emer-
gency. It cannot be used to jump start
another vehicle.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.70) is in the red zone
or a loss of hybrid system power is
experienced. (For example, the
vehicle speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” or “Hybrid system over-
heated Output power reduced” is
shown on the multi-information
display.
 Steam comes out from under the
hood.
Correction procedures

4118-1. Specifications
8
Vehicle specifications
*:Table 1  Occupant loading and distribution for vehicle normal load for various desig-
nated seating capacities
Snow tire
A tire that attains a traction index equal to or greater than 110, com-
pared to the ASTM E-1136 Standard Reference Test Tire, when using
the snow traction test as described in ASTM F-1805-00, Standard
Test Method for Single Wheel Driving Traction in a Straight Line on
Snow-and Ice-Covered Surfaces, and which is marked with an
Alpine Symbol ( ) on at least one sidewall
Test rimThe rim on which a tire is fitted fo r testing, and may be any rim listed
as appropriate for use with that tire
TreadThat portion of a tire that comes into contact with the road
Tread ribA tread section running circumferentially around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indica-
tors (TWI)The projections within th e principal grooves designed to give a visual
indication of the degree s of wear of the tread
Wheel-holding fix-
tureThe fixture used to hold the wheel and tire assembly securely during
testing
Designated seating capacity,
Number of occupantsVehicle normal load, Num- ber of occupantsOccupant distribution in a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 1552 in front, 1 in second seat, 1 in
third seat, 1 in fourth seat
16 through 2072 in front, 2 in second seat, 2 in third seat, 1 in fourth seat
Tire related termMeaning

4158-2. Customization
8
Vehicle specifications
■Smart access system with push-button start and wireless remote control
(  P.91, 102)
■Smart access system with push-button start ( P.91, 102)
■Wireless remote control ( P.88, 91, 95)
FunctionDefault settingCustomized set-
ting
Operating signal (Buzzers)5OffOO1 to 7
Operation signal (Emergency
flashers)OnOffOO
Time elapsed before automatic
door lock function is activated if
door is not opened after being
unlocked
60 seconds
Off
OO30 seconds
120 seconds
Open door warning buzzerOnOffO
FunctionDefault settingCustomized set-ting
Smart access system with push-
button startOnOffO
Smart door unlockingDriver’s doorAll the doorsOO
Time elapsed before unlocking
all the door when gripping and
holding the driver’s door handle
2 seconds
Off
O1.5 seconds
2.5 seconds
Number of consecutive door
lock operations2 timesAs many as desiredO
FunctionDefault settingCustomized set-ting
Wireless remote controlOnOffO
Unlocking operation
Driver’s door
unlocked in one step, all doors
unlocked in two step
All doors unlocked in one stepOO
ABC
ABC
ABC

4269-1. For owners
9-1.For owners
Tirez sur la ceinture épaulière
jusqu’à ce qu’elle recouvre entière-
ment l’épaule; elle ne doit cepen-
dant pas toucher le cou ni glisser de
l’épaule.
 Placez la ceinture abdominale le
plus bas possible sur les hanches.
 Réglez la position du dossier. Tenez-
vous assis bien au fond du siège, le
dos droit.
 Ne vrillez pas la ceinture de sécu-
rité.
Reporting safety defects for
U.S. owners
If you believe that your vehicle has a
defect which could cause a crash or
could cause injury or death, you
should immediately inform the
National Highway Traffic Safety
Administration (NHTSA) in addi-
tion to notifying the Lexus Division
of Toyota Motor Sa les, U.S.A., Inc.
(Toll-free: 1-800-25-LEXUS).
If NHTSA receives similar com-
plaints, it may open an investiga-
tion, and if it finds that a safety
defect exists in a group of vehicles,
it may order a recall and remedy
campaign. However, NHTSA can-
not become involved in individual
problems between you, your dealer,
or Lexus Division of Toyota Motor
Sales, U.S.A., Inc.
To contact NHTS A, you may call
the Vehicle Safety Hotline toll-free
at 1-888-327-4236 (TTY: 1-800-
424-9153); go to
http://www.safer-
car.gov
; or write to: Administrator,
NHTSA, 1200 New Jersey Ave,
S.E., Washington, DC 20590. You
can also obtain other information
about motor vehicle safety from
http://www.safercar.gov.
Seat belt instructions for
Canadian owners (in French)
The following is a French explana-
tion of seat belt instructions
extracted from the seat belt section
in this manual.
See the seat belt section for more
detailed seat belt instructions in
English.
Utilisation adéquate des cein-
tures de sécurité