overheating LEXUS ES300h 2022 Owners Manual

13Pictorial index
Precautions against winter season ............................................................................ P.262
To prevent freezing (windshield wiper de-icer)
*................................................. P.275
Precautions against car wash
*....................................................................................P.309
Fuel filler door .......................................................................................................... P.174
Refueling method ............................................................................................................... P.174
Fuel type/fuel tank capacity .........................................................................................P.403
Tires.......................................................................................................................... . P.330
Tire size/inflation pressure ........................................................................................... P.407
Winter tires/tire chain .................................................................................................... P.26 0
Checking/rotation/tire pressure warning system..............................................P.330
Coping with flat tires........................................................................................................ P .379
Hood ........................................................................................................................... P.321
Opening .................................................................................................................................P.321
Engine oil .............................................................................................................................. P.404
Coping with overheating............................................................................................... P.396
Warning messages .......................................................................................................... P.374
Headlights/side marker lights/cornering lights............................................ P.163
Turn signal lights ......................................................................................................P.158
Parking lights/daytime running lights............................................................... P.163
Tail/stop lights .......................................................................................................... P.163
License plate lights ................................................................................................. P.163
Back up lights
Shifting the shift lever to R ........... ................................................................................... P.15 5
*: If equipped
Light bulbs of the exterior lights for driving
(Replacing method: P.352, Watts: P.409)
E
F
G
H
I
J
K
L

782-1. Instrument cluster
5Continue to hold the “ODO TRIP”
switch for approximately 5 seconds,
and then release it once the odometer
begins flashing.
Updating is complete once the odometer
flashes for approximately 5 seconds and
then the display returns to normal.
QOutside temperature display
OIn the following situations, the correct
outside temperature may not be dis-
played, or the display may take longer
than normal to change:
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit
of a garage, tunnel, etc.)
OWhen “--” or “E” is displayed, the system
may be malfunctioning. Take your vehicle
to your Lexus dealer.
QLiquid crystal display
 P.86
QCustomization
The gauges and meters can be customized
on of the multi-information display.
(  P.89)
QDisplay items
 Odometer
Displays the total distance the vehicle has
been driven.
Trip meter A/trip meter B
Displays the distance the vehicle has been
driven since the meter was last reset. Trip
meters A and B can be used to record and
display different distances independently.
Distance until next engine oil
change
Displays the distance the vehicle can be
driven until an oil change is necessary.
QChanging the display
Each time the “ODO TRIP” switch is
pressed, the displayed item will be
changed. When the trip meter is dis-
played, pressing and holding the switch
will reset the trip meter.
WARNING
QThe information display at low tem-
peratures
Allow the interior of the vehicle to warm
up before using the liquid crystal infor-
mation display. At extremely low tem-
peratures, the information display
monitor may respond slowly, and display
changes may be delayed.
For example, there is a lag between the
driver’s shifting and the new gear num-
ber appearing on the display. This lag
could cause the driver to downshift
again, causing rapid and excessive
engine braking and possibly an accident
resulting in death or injury.
NOTICE
QTo prevent damage to the engine and
its components
ODo not let the indicator needle of the
tachometer enter the red zone, which
indicates the maximum engine speed.
OThe engine may be overheating if the
engine coolant temperature gauge is
in the red zone (H). In this case, imme-
diately stop the vehicle in a safe place,
and check the engine after it has
cooled completely. ( P.396)
Odometer and trip meter dis-
play

842-1. Instrument cluster
QCustomization
The gauges and meters can be customized
on of the multi-information display.
(  P.89)
QDisplay items
 Odometer
Displays the total distance the vehicle has
been driven.
Trip meter A/trip meter B
Displays the distance the vehicle has been
driven since the meter was last reset. Trip
meters A and B can be used to record and
display different distances independently.
Distance until next engine oil
change
Displays the distance the vehicle can be
driven until an oil change is necessary.
QChanging the display
Each time the “ODO TRIP” switch is
pressed, the displayed item will be
changed. When the trip meter is dis-
played, pressing and holding the switch
will reset the trip meter.
QPop-up display
Distance until the next engine oil
change will be displayed when a warn-
ing message indicating that oil mainte-
nance should be performed soon or is
required is displayed.
The brightness of the instrument panel
lights can be adjusted.
WARNING
QThe information display at low tem-
peratures
Allow the interior of the vehicle to warm
up before using the liquid crystal infor-
mation display. At extremely low tem-
peratures, the information display
monitor may respond slowly, and display
changes may be delayed.
For example, there is a lag between the
driver’s shifting and the new gear num-
ber appearing on the display. This lag
could cause the driver to downshift
again, causing rapid and excessive
engine braking and possibly an accident
resulting in death or injury.
NOTICE
QTo prevent damage to the engine and
its components
ODo not let the indicator needle of the
tachometer enter the red zone, which
indicates the maximum engine speed.
OThe engine may be overheating if the
engine coolant temperature gauge is
in the red zone (H). In this case, imme-
diately stop the vehicle in a safe place,
and check the engine after it has
cooled completely. ( P.396)
Odometer and trip meter dis-
playChanging the instrument panel
light brightness

1424-1. Before driving
WARNING
QWhen taking a nap in the vehicle
Always turn the hybrid system off. Oth-
erwise, if you accidentally move the shift
lever or depress the accelerator pedal,
this could cause an accident or fire due
to hybrid system overheating. Addition-
ally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may col-
lect and enter the vehicle, leading to
death or a serious health hazard.
QWhen braking
OWhen the brakes are wet, drive more
cautiously.
Braking distance increases when the
brakes are wet, and this may cause
one side of the vehicle to brake differ-
ently than the other side. Also, the
parking brake may not securely hold
the vehicle.
OIf the electronically controlled brake
system does not operate, do not follow
other vehicles closely and avoid hills or
sharp turns that require braking.
In this case, braking is still possible, but
the brake pedal should be depressed
more firmly than usual. Also, the brak-
ing distance will in crease. Have your
brakes fixed immediately.
OThe brake system consists of 2 or
more individual hydraulic systems; if
one of the systems fails, the other(s)
will still operate. In this case, the brake
pedal should be depressed more
firmly than usual and the braking dis-
tance will increase. Have your brakes
fixed immediately.
NOTICE
QWhen driving the vehicle
ODo not depress the accelerator and
brake pedals at the same time while
driving, as this may restrain the hybrid
system output.
ODo not use the accelerator pedal or
depress the accelerator and brake
pedals at the same time to hold the
vehicle on a hill.
QAvoiding damage to vehicle parts
ODo not turn the steering wheel fully in
either direction and hold it there for an
extended period of time.
Doing so may damage the power
steering motor.
OWhen driving over bumps in the road,
drive as slowly as possible to avoid
damaging the wheels, underside of the
vehicle, etc.
QIf you get a flat tire while driving
A flat or damaged tire may cause the fol-
lowing situations. Hold the steering
wheel firmly and gradually depress the
brake pedal to slow down the vehicle.
OIt may be difficult to control your vehi-
cle.
OThe vehicle will make abnormal
sounds or vibrations.
OThe vehicle will lean abnormally.
Information on what to do in case of a flat
tire ( P.379)
QWhen encountering flooded roads
Do not drive on a road that has flooded
after heavy rain etc. Doing so may cause
the following serious damage to the vehi-
cle:
OEngine stalling
OShort in electrical components
OEngine damage caused by water
immersion
In the event that you drive on a flooded
road and the vehicle is flooded, be sure
to have your Lexus dealer check the fol-
lowing:
OBrake function

1494-2. Driving procedures
4
Driving
system. In this case, try to start the hybrid
system again after the temperature of the
hybrid battery increases due to the out-
side temperature increase etc.
QSounds and vibrations specific to a
hybrid vehicle
 P.60
QIf the 12-volt battery is discharged
The hybrid system cannot be started using
the smart access system with push-button
start. Refer to P.391 to restart the hybrid
system.
QElectronic key battery depletion
 P.100
QConditions affecting operation
 P.117
QNotes for the entry function
 P.117
QSteering lock function
OAfter turning the power switch off and
opening and closing the doors, the steer-
ing wheel will be locked due to the steer-
ing lock function. Operating the power
switch again automatically cancels the
steering lock.
OWhen the steering lock cannot be
released, “Push Power Switch while
Turning Steering Wheel in Either Direc-
tion” will be displayed on the multi-infor-
mation display.
Check that the shift lever is set in P. Press
the power switch shortly and firmly while
turning the steering wh eel left and right.
OTo prevent the steering lock motor from
overheating, the motor may be sus-
pended if the hybrid system is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the power switch. After about 10 sec- onds, the steering lock motor will resume
functioning.
QIf there is a malfunction in the smart
access system with push-button start
If “Access System with Elec. Key Malfunc-
tion See Owner’s Manual” is displayed on
the multi-information display, the system
may be malfunctioning. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
QIf the “READY” indicator does not
come on
In the event that the “READY” indicator
does not come on even after performing
the proper procedures for starting the vehi-
cle, contact your Lexus dealer immediately.
QIf the hybrid system is malfunctioning
 P.65
QElectronic key battery
 P.347
QOperation of the power switch
OIf the switch is not pressed shortly and
firmly, the power switch mode may not
change or the hybrid system may not
start.
OIf attempting to restart the hybrid system
immediately after turning the power
switch off, the hybrid system may not start
in some cases. After turning the power
switch off, please wait a few seconds
before restarting the hybrid system.
QCustomization
If the smart access system with push-button
start has been deactivated in a customized
setting, refer to P.421.
WARNING
QWhen starting the hybrid system
Always start the hybrid system while sit-
ting in the driver’s seat. Do not depress
the accelerator pedal while starting the
hybrid system under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury.

1604-2. Driving procedures
QTurning the automatic mode off
While the vehicle is stopped, pull and
hold the parking brake switch until a
message is shown on the multi-infor-
mation display
QParking brake operation
OWhen the power switch is not in ON
mode, the parking brake cannot be
released using the parking brake switch.
OWhen the power switch is not in ON
mode, automatic mode (automatic brake
setting and releasing) is not available.
QParking brake automatic release func-
tion
OWhen the shift lever is shifted from P, the
parking brake will be released in auto-
matic mode.
OWhen all of the following conditions are
met in manual mode, the parking brake
can be released by depressing the accel-
erator pedal.
• The driver’s door is closed
• The driver is wearing the seat belt
• The shift lever is in D, S or R
QIf “Parking Brake Temporarily Unavail-
able” is displayed on the multi-informa-
tion display
If the parking brake is operated repeatedly
over a short period of time, the system may
restrict operation to prevent overheating. If
this happens, refrain from operating the
parking brake. Normal operation will return
after about 1 minute.
QIf “Parking Brake Unavailable” or “EPB
Unavailable” is displayed on the multi-
information display
Operate the parking brake switch. If the
message does not disappear after operat-
ing the switch several times, the system may
be malfunctioning. Have the vehicle
inspected by your Lexus dealer.
QParking brake operation sound
When the parking brake operates, a motor
sound (whirring sound) may be heard. This
does not indicate a malfunction.
QParking brake indicator light
ODepending on the power switch mode,
the parking brake indicator light will turn
on and stay on as described below:
ON mode: Comes on until the parking
brake is released.
Not in ON mode: Stays on for approxi-
mately 15 seconds.
OWhen the power switch is turned off with
the parking brake set, the parking brake
indicator light will stay on for about 15
seconds. This does not indicate a mal-
function.
QWhen the parking brake switch mal-
functions
Automatic mode (automatic brake setting
and releasing) will be turned on automati-
cally.
QParking the vehicle
 P.138
QParking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven
with the parking brake engaged. “EPB
Applied” is displayed on the multi-informa-
tion display (with the vehicle reached a
speed of 3 mph [5 km/h]).
QIf the brake system warning light comes
on
 P.364
QUsage in winter time
 P.260

1614-2. Driving procedures
4
Driving
Turns the brake hold system on
The brake hold standby indicator (green) comes on. While the system is holding
the brake, the brake hold operated indica-
tor (yellow) comes on.
QBrake hold system operating conditions
The brake hold system cannot be turned on
in the following conditions:
OThe driver’s door is not closed.
OThe driver is not wearing the seat belt.
O“Parking Brake Unavailable” or “EPB
Malfunction Visit Your Dealer” is dis-
played on the multi-information display.
If any of the conditions above are detected
when the brake hold system is enabled, the
system will turn off and the brake hold
standby indicator light will go off. In addi-
WARNING
QWhen parking the vehicle
Do not leave a child in the vehicle alone.
The parking brake may be released unin-
tentionally and there is the danger of the
vehicle moving that may lead to an acci-
dent resulting in death or serious injury.
NOTICE
QWhen parking the vehicle
Before you leave the vehicle, shift the
shift lever to P, set the parking brake and
make sure that the vehicle does not
move.
QWhen the system malfunctions
Stop the vehicle in a safe place and
check the warning messages.
QWhen the parking brake cannot be
released due to a malfunction
Driving the vehicle with the parking
brake set will lead to brake components
overheating, which may affect braking
performance and increase brake wear.
Have the vehicle inspected by your
Lexus dealer immediately if this occurs.
Brake Hold
The brake hold system keeps the
brake applied when the shift lever is
in D, S or N with the system on and
the brake pedal has been
depressed to stop the vehicle. The
system releases the brake when the
accelerator pedal is depressed with
the shift lever in D or S to allow
smooth start off.
Enabling the system
A
B

2805-3. Using the air conditioning system
QOperation condition
The power switch is in ON mode.
QAir conditioning system-linked control
mode
When the seat ventilator fan speed level is
Hi (when “AUTO” is selected), the seat
ventilator fan speed may become higher
according to the fan speed of the air condi-
tioning system.
QWhen AUTO mode is selected
The following functions may turn off
according to the air conditioning set tem-
perature, outside temperature, etc.
OSeat heaters
OSeat ventilators
QStored settings
When the power switch is turned to ON
mode, the stored settings of the following
functions are recalled.
OSeat heaters
OSeat ventilators
QMain display
Using the touchpad of the Remote
Touch, select the button on the screen.
This system can also be operated by
the touch screen.
Adjust the seat ventilator fan speed
level
The seat ventilator can be adjusted in 3
levels.
When the seat ventilator is operated, the
fan speed level is displayed on the screen.
Adjust the seat heater temperature
level
The seat heater can be adjusted in 3 levels.
When the seat heater is operated, the tem-
perature level is displayed on the screen.
Adjust the heated steering wheel
temperature level
The heated steering wheel can be adjusted
in 2 levels.
When the heated steering wheel is oper-
ated, the temperature level is displayed on
the screen.
Automatic mode on/off indicators
When the automatic mode is on, the indi-
cator illuminates on the screen.
Sub function menu
WARNING
QTo prevent overheating and minor
burn injuries
Observe the following precautions when
using the seat heaters.
ODo not cover the seat with a blanket or
cushion when using the seat heater.
ODo not use seat heater more than nec-
essary.
Control screen
A
B
C
D
E

3967-2. 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.
3 After the hybrid system has cooled
down sufficiently, inspect the hoses
and cooling system for leaks.
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
Radiator
Cooling fan
4 The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
Reservoir
“F” line
“L” line
Coolant inlet cap
5 Add coolant if necessary.
Water can be used in an emergency if
engine coolant is unavailable.
If water was added in an emergency, have
the vehicle inspected at your Lexus dealer
If your vehi cle overheats
The following may indicate that
your vehicle is overheating.
The engine coolant temperature
gauge ( P.76, 80) is in the red
zone or a loss of hybrid system
power is experienced. (For exam-
ple, 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
A
B
A
B
C
D

452Alphabetical index
C
Card key .......................................................... 100
Care ......................................................... 308, 311Aluminum wheels ..................................... 308
Exterior .......................................................... 308
Interior ................................................................ 311
Seat belts........................................................... 311
Cargo capacity...............................................146
Cargo hooks ................................................. 288
Center Display ............................................. 266
Chains ................................................................261
Child-protectors............................................107
Child restraint system................................... 43 Fixed with a LATCH system ..................50
Fixed with a seat belt....................................47
Front passenger occupant classification system ..............................................................37
Points to remember .................................... 43
Riding with children ..................................... 43
Types of child restraint system installation method ........................................................... 44
Using an anchor bracket .......................... 53
Child safety ....................................................... 43 12-volt battery precautions .......329, 394
Airbag precautions...................................... 33
Child restraint system................................. 44
Heated steering wheel and seat heater precautions................................................ 278
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................135
Power window lock switch..................... 132
Power window precautions ................... 132
Rear door child-protectors ....................107
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 43
Trunk precautions ...................................... 108
Cleaning ................................................. 308, 311 Aluminum wheels ..................................... 308
Exterior .......................................................... 308
Interior ................................................................ 311 Radar sensor ........................................177, 215
Seat belts ........................................................... 311
Clock ............................................... 76, 80, 289
Coat hooks..................................................... 297
Compass ......................................................... 303
Condenser ..................................................... 326
Console box .................................................. 286
Console box light ........................................ 286
Cooling system............................................. 325 Engine overheating.................................. 396
Hybrid system overheating .................. 397
Cornering lights .............................................165 Replacing light bulbs................................352
Cruise control Dynamic radar cruise control with full-speed range ..............................................204
Cup holder ..................................................... 286
Current fuel consumption .......................... 87
Curtain shield airbags .................................. 28
Customizable features ................................421
Custom mode .................................................219
D
Daytime running light system ...................163
Defogger Outside rear view mirrors....................... 271
Rear window .................................................. 271
Windshield ...................................................... 271
Dimension ...................................................... 402
Dinghy towing................................................. 147
Display BSM (Blind Spot Monitor)......................214
Dynamic radar cruise control with full-speed range ..............................................204
Energy monitor ..............................................95
Head-up display..............................................91
Intuitive parking assist .............................. 222
LTA (Lane-Tracing Assist) .....................197
Multi-information display ..........................85
Parking Support Brake function (rear pedestrians)................................................ 251
RCD (Rear Camera Detection) ........236