service Lexus ES300h 2019 (OM33D00U) Owner's Guide

3106-2. Maintenance
3Press or of the meter control
switches and select “Scheduled Mainte-
nance”. Then press “OK”.
4 Select “Yes” and press “OK”.
A message will be disp layed when the reset
procedure has been completed.
You can perform some maintenance
procedures by yourself.
Please be aware that do-it-yourself
maintenance may affect warranty cov-
erage.
The use of Lexus repair manuals is recom-
mended.
For details about warra nty coverage, refer
to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Man-
ual Supplement” or “Warranty Booklet”.
Do-it-yourself maintenance
General maintenance
Listed below are the general main-
tenance items that should be per-
formed at the intervals specified in
the “Warranty and Service Guide”
or “Owner’s Manual Supplement”.
It is recommended that any prob-
lem you notice should be brought to
the attention of your Lexus dealer
or qualified service shop for advice.
WARNING
■If the hybrid system is operating
Turn the hybrid system off and ensure
that there is adequate ventilation before
performing maintenance checks.
Engine compartment
ItemsCheck points
Brake fluid
Is the brake fluid at the
correct level?
(  P.322)
Engine/power
control unit cool-
antIs the engine/power
control unit coolant at
the correct level?
( P.320)
Engine oil
Is the engine oil at the
correct level?
( P.318)
Exhaust system
There should not be
any fumes or strange
sounds.

3136-2. Maintenance
6
Maintenance and care
The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.
When the 12-volt battery is discon-
nected or discharged
Readiness codes that are set during
ordinary driving are erased.
Also, depending on your driving
habits, the readiness codes may not
be completely set.
 When the fuel tank cap is loose
The malfunction indicator lamp
comes on indicating a temporary
malfunction and your vehicle may
not pass the I/M test. The error code in the OBD system will
not be cleared unless the vehicle is
driven 40 or more times.
Contact your Lexus dealer to prepare
the vehicle for re-testing.
Emission inspection and
maintenance (I/M) pro-
grams
Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.
If the malfunction indicator lamp
comes on
Your vehicle may not pass the
I/M test in the following situa-
tions:
When the malfunction indicator
lamp still remains on after sev-
eral driving trips
If your vehicle does not pass the
I/M test

3146-3. Do-it-yourself maintenance
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
12-volt battery
condition
( P.323)•Grease
• Conventional wrench
(for terminal clamp
bolts)
Brake fluid
level
( P.322)
• FMVSS No.116 DOT 3
or SAE J1703 brake
fluid
FMVSS No.116 DOT 4
or SAE J1704 brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power
control unit
coolant level
( P.320)
•“Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
For the U.S.A.:
“Toyota Super Long Life
Coolant” is pre-mixed
with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life
Coolant” is pre-mixed
with 55% coolant and
45% deionized water.
• Funnel (used only for adding coolant)
Hybrid bat-
tery (traction
battery) air
intake vent
( P.304)
• Vacuum cleaner, etc.
• Phillips screwdriver
Engine oil level
( P.318)
•“Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.341)• Fuse with same amper-
age rating as original
Headlight aim• Phillips-head screw-driver
Light bulbs
( P.344)
•Bulb with same number
and wattage rating as
original
•Flathead sc rewdriver
ItemsParts and tools

3206-3. Do-it-yourself maintenance
between oil maintenance intervals.
●When the engine is new, for example
directly after purchasing the vehicle or
after replacing the engine
●If low quality oil or oil of an inappropriate
viscosity is used
●When driving at high engine speeds or
with a heavy load, or when driving while
accelerating or decelerating frequently
●When leaving the engine idling for a long
time, or when driving frequently through
heavy traffic
■After changing the engine oil
The engine oil maintena nce data should be
reset. Perform the following procedures:
1 While the vehicle is stopped, press
of the meter control switches.
2 Press or of the meter control
switches, and select .
3 Press or of the meter control
switches, select “Veh icle Settings”, and
then press “OK”.
4 Press or of the meter control
switches, select “Oil Maintenance”, and
then press “OK”.
5 Select “Yes” and then press “OK”.
A message will be displayed on the multi-
information display.
The coolant level is satisfactory if it is
between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir when
the hybrid system is cold.
■Engine coolant reservoir
WARNING
■Used engine oil
●Used engine oil contains potentially
harmful contaminants which may
cause skin disorders such as inflamma-
tion and skin cancer, so care should be
taken to avoid prolonged and
repeated contact. To remove used
engine oil from your skin, wash thor-
oughly with soap and water.
●Dispose of used oil and filters only in a
safe and acceptable manner. Do not
dispose of used oil and filters in house-
hold trash, in sewers or onto the
ground.
Call your Lexus dealer, service station
or auto parts store for information
concerning recycling or disposal.
●Do not leave used engine oil within the
reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the
vehicle components.
●Avoid overfilling, or the engine could
be damaged.
●Check the oil level on the dipstick
every time you re fill the vehicle.
●Be sure the engine o il filler cap is prop-
erly tightened.
Checking the coolant

3376-3. Do-it-yourself maintenance
6
Maintenance and care
Use only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.
 When rotating, repairing or chang-
ing your tires, check that the wheel
nuts are still tight after driving 1000
miles (1600 km).
 Vehicles with 17-inch tires: Be care-
ful not to damage the aluminum
wheels when using tire chains.
 Use only Lexus genuine balance
weights or equivalent and a plastic or rubber hammer when balancing
your wheels.
WARNING
●Never use an inner tube in a leaking
wheel which is designed for a tubeless
tire. Doing so may result in an acci-
dent, causing death or serious injury.
■Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air
during driving, possibly causing an acci-
dent.
NOTICE
■Replacing tire pressure warning
valves and transmitters
●Because tire repair or replacement
may affect the tire pressure warning
valves and transmitters, make sure to
have tires serviced by your Lexus
dealer or other qualified service shop.
In addition, make sure to purchase
your tire pressure warning valves and
transmitters at your Lexus dealer.
●Ensure that only ge nuine Lexus wheels
are used on your vehicle.
Tire pressure warning valves and trans-
mitters may not work properly with
non-genuine wheels.
Aluminum wheel precautions

3537-2. Steps to take in an emergency
7
When trouble arises
7-2.Steps to take in an emergency
The following may indicate a problem
with your hybrid transmission. Contact
your Lexus dealer or commercial tow-
ing service before towing.
 The hybrid system warning message
If your vehicle needs to be
towed
If towing is ne cessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws.
WARNING
Observe the following precautions.
Failure to do so may result in death or
serious injury.
■When towing the vehicle
Be sure to transport the vehicle with the
front wheels raised or with all four wheels
raised off the ground. If the vehicle is
towed with the front wheels contacting
the ground, the drivetrain and related
parts may be damaged or electricity
generated by the operation of the motor
may cause a fire to occur depending on
the nature of the damage or malfunction.
■While towing
●When towing using cables or chains,
avoid sudden starts, etc. which place
excessive stress on the towing eyelets,
cables or chains. The towing eyelets,
cables or chains may become dam-
aged, broken debris may hit people,
and cause serious damage.
●Do not turn the power switch off.
There is a possibility that the steering
wheel is locked and cannot be oper-
ated.
■Installing towing eyelets to the vehi-
cle
Make sure that towing eyelets are
installed securely.
If not securely installed, towing eyelets
may come loose during towing.
NOTICE
■To prevent damage to the vehicle
when towing using a wheel-lift type
truck
●Do not tow the vehicle from the rear
when the power switch is off. The
steering lock mechanism is not strong
enough to hold the front wheels
straight.
●When raising the vehicle, ensure ade-
quate ground clearance for towing at
the opposite end of the raised vehicle.
Without adequate clearance, the vehi-
cle could be damaged while being
towed.
■To prevent damage to the vehicle
when towing with a sling-type truck
Do not tow with a sling-type truck, either
from the front or rear.
■To prevent damage to the vehicle
during emergency towing
Do not secure cables or chains to the
suspension components.
Situations when it is necessary to
contact dealers before towing

3817-2. Steps to take in an emergency
7
When trouble arises
Remove the cover inside the trunk and
pull the lever.
Using the lever to open the fuel filler door
may not allow for an adequate reduction in
fuel tank pressure before refueling. To pre-
vent fuel from spilling out, turn the cap
slowly when removing it. During refueling,
fuel may spill out from the filler opening
due to air being discharged from inside the
fuel tank. Therefore, f ill the fuel tank care-
fully and slowly.
■When the electronic key does not work
properly
●Make sure that the smart access system
with push-button start has not been deac-
tivated using the Remote Touch or at your
Lexus dealer. If it is off, turn the function
on.
●Check if battery-saving mo de is set. If it is
set, cancel the function. ( P.103)
Use the mechanical key ( P.90) in
order to perform th e following opera-
tions:
If the fuel filler door cannot
be opened
If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the following procedure
can be used to open the fuel filler
door.
Opening the fuel filler door
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.103) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors and trunk can be opened and
the hybrid system can be started by
following the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key-rela ted problems
Take your vehicle with all the electronic
keys provided with your vehicle to your
Lexus dealer as soon as possible.
Locking and unlocking the
doors, opening the trunk and
using the key linked functions

4028-1. Specifications
Lexus does not recommend the use of gas-
oline that contains MMT. If fuel containing
MMT is used, your emission control system
may be adversely affected.
The malfunction indicator lamp on the
instrument cluster may come on. If this hap-
pens, contact your Lexus dealer for service.
■If your engine knocks
●Consult your Lexus dealer.
●You may occasionally notice light knock-
ing for a short time while accelerating or
driving uphill. This is normal and there is
no need for concern.
NOTICE
■Notice on fuel quality
●Do not use improper fuels. If improper
fuels are used, the engine will be dam-
aged.
●Do not use leaded gasoline.
Leaded gasoline can cause damage to
your vehicle’s three-way catalytic con-
verters causing the emission control
system to malfunction.
●Do not use gasohol other than the type
previously stated.
Other gasohol may cause fuel system
damage or vehicle performance prob-
lems.
●Using unleaded gasoline with an
octane number or rating lower than
the level previously stated may cause
persistent he avy knocking.
At worst, this may lead to engine dam-
age and will void the vehicle warranty.
■Fuel-related poor driveability
If poor driveability (poor hot starting,
vaporization, engine knocking, etc.) is
encountered after using a different type
of fuel, discontinue the use of that type of
fuel.
■When refueling with gasohol
Take care not to spill gasohol. It can dam-
age your vehicle’s paint.

4068-1. Specifications
■Tire dimensionsSection width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.
Your Lexus dealer will help answer any
questions you may have as you read this
information.
■DOT quality grades
All passenger vehicle tires must con-
form to Federal Safety Requirements in
addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.
For example: Treadwear 200 Traction AA
Temperature A
■Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would wear
one and a half (1 - 1/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use.
Performance may differ significantly from
the norm due to variatio ns in driving habits,
service practices and differences in road
characteristics and climate.
Tire section names
A
B
C
A
B
C
D
E
F
G
H
I
J
K
Uniform Tire Quality Grading

449What to do if... (Troubleshooting)Alphabetical index449
Fuses ..................................................................341
Light bulbs..................................................... 344
Tires .................................................................. 372
Resetting the message indicating mainte- nance is required ...................................... 309
Road Sign Assist ........................................... 185
RSA (Road Sign Assist) ............................. 185
S
SCB (Secondary Collision Brake) ....... 236
Seat belt reminder ligh t...............................361
Seat belts............................................................ 24 Adjusting the seat belt................................ 26
Automatic Locking Retractor ................ 26
Child restraint system installation ......... 43
Cleaning and maintaining the seat belt....303
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt 25
Pregnant women, proper seat belt use.... 24
Reminder light and buzzer .....................361
Seat belt extender ........................................ 25
Seat belt pretensioners .............................. 26
SRS warning light ......................................359
Seat heaters ..................................................... 261
Seating capacity.............................................133
Seat position memory................................... 110
Seats................................................................... 109 Adjustment precautions .......................... 109
Adjustment..................................................... 109
Child seats/child restraint system installa-tion .....................................................................42
Cleaning.........................................................303
Driving position memory.......................... 110
Head restraints .............................................. 113
Power easy access system ...................... 110
Properly sitting in the seat .........................23
Seat heaters .................................................... 261
Seat position memory ................................ 110 Seat ventilators ..............................................261
Seat ventilators ...............................................261
Secondary Collision Brake (SCB) ....... 236
Sensor Automatic headlight system .................. 150
Automatic High Beam system ............. 153
Inside rear view mirror ............................... 117
Intuitive parking assist ............................. 205
LTA (Lane Tracing Assist) ......................176
Parking Support Brake function (rear-crossing vehicles)................................... 229
Parking Support Brake function (static objects) ........................................................ 225
Radar sensor ...................................... 163, 198
Rain-sensing windshield wipers .......... 158
RCTA................................................................. 212
Service plug ...................................................... 56
Service reminder message ..................... 309
S-FLOW mode ............................................ 258
Shift lever Hybrid transmission..................................... 141
Shift lever light .............................................. 265
Side airbags ...................................................... 28
Side marker lights......................................... 150 Light switch .................................................... 150
Side mirrors ...................................................... 117 Adjustment ....................................................... 117
BSM (Blind Sport Monitor)....................197
Folding................................................................ 118
Linked mirror function when reversing ....
118
Mirror position memory ............................ 110
RCTA function ............................................... 211
Side turn signal lights ...................................145 Replacing light bulbs ................................344
Turn signal lever .......................................... 145
Side windows ..................................................120
Smart access system with push-button start...................................................................102Antenna location ......................................... 102
Entry functions ......................................... 91, 97
Starting the hybrid system ...................... 135