overheating LEXUS LS500 2019 Owners Manual

13Pictorial index
LS500_OM_(U)_1810 Precautions for winter season .. .................................................................................. P.300
To prevent freezing (windshield wiper de-icer) *
.................................................. P.318
Precautions for car wash ...............................................................................................P.359
Fuel filler door ..........................................................................................................P.189
Refueling method .............................................................................................................. P .189
Fuel type/fuel tank capacity ...... ................................................................................... P.447
Tires.......................................................................................................................... .P.382
Tire size/inflation pressure ............................................................................... P.382, 452
Winter tires/tire chains ................................................................................................. P.300
Checking/rotation/tire pressu re warning system..............................................P.382
Coping with flat tires........................................................................................................ P .429
Hood ........................................................................................................................... P.371
Opening ........................................................................................................................ .........P.371
Engine compartment cover ......................................................................................... P.374
Engine oil ..................................................................................................................... ......... P.448
Coping with overheating ............................................................................................... P.440
Warning messages .......................................................................................................... P.425
Headlights/cornering lights ................................................................................ P.179
Parking lights/daytime running lights............................................................... P.179
Turn signal lights ...................................................................................................... P.173
Tail lights .................................................................................................................... P.179
Stop lights
Hill-start assist control .................................................................................................... P. 295
License plate lights ................................................................................................. P.179
Back-up lights
Changing the shift position to R....................................................................................P.167
Side marker lights ................................................................................................... P.179 *
:If equipped Light bulbs of the exterior lights for driving
(Replacing method: P.404) E
F
G
H
I
J
K
L
M
N

74 2-1. Instrument cluster
LS500_OM_(U)_1810 Displays warning messages if a malfunction occurs (  P.425)■
Outside temperature display●
In 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.)●
When “--” or “E” is displayed, the system
may be malfunctioning. Take your vehicle
to your Lexus dealer.■
Liquid crystal display
 P.81■
Customization
The gauges and meters can be customized
on of the multi-information display.
(  P.85) ■
Display 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. ■
Changing 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■
The 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 in formation 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 number
appearing on the display. This lag could
cause the driver to downshift again,
causing rapid and excessive engine brak-
ing and possibly an accident resulting in
death or injury.
NOTICE
■
To prevent damage to the engine and
its components
●
Do not let the indicator needle of the
tachometer enter the red zone, which
indicates the maximum engine speed. ●
The 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.440)
Odometer and trip meter dis-
play

792-1. Instrument cluster
LS500_OM_(U)_1810 2
Vehicle status information and indicators
■
Display 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.
■
Changing 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.
■
Pop-up display
The distance until the next engine oil
change will displayed when a warning
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.
1 Darker
2 Brighter ■
Brightness of the meters (day mode and
night mode)
The brightness of the meters changes
between day mode and night mode.
●
Day mode: When the tail lights are off or WARNING
For example, there is a lag between the
driver’s shifting and the new gear number
appearing on the display. This lag could
cause the driver to downshift again,
causing rapid and excessive engine brak-
ing and possibly an accident resulting in
death or injury.
NOTICE■
To prevent damage to the engine and
its components●
Do not let the indicator needle of the
tachometer enter the red zone, which
indicates the maximum engine speed.●
The 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.440)
Odometer and trip meter dis-
play Changing the instrument panel
light brightness

158 4-1. Before driving
LS500_OM_(U)_1810 WARNING●
In order to prevent accidents due to
the vehicle rolling away, always keep
depressing the brake pedal while the
engine is running, and apply the park-
ing brake as necessary.●
If the vehicle is stopped on an incline,
in order to prevent accidents caused
by the vehicle rolling forward or back-
ward, always depress the brake pedal
and securely apply the parking brake
as needed.●
Avoid revving or racing the engine.
Running the engine at high speed
while the vehicle is stopped may cause
the exhaust system to overheat, which
could result in a fire if combustible
material is nearby.■
When the vehicle is parked●
Do not leave glasses, cigarette lighters,
spray cans, or soft drink cans in the
vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter
or spray can, and may lead to a fire.
• The temperature inside the vehicle
may cause the plastic lenses and plas-
tic material of glasses to deform or
crack.
• Soft drink cans may fracture, causing
the contents to spray over the interior
of the vehicle, and may also cause a
short circuit in the vehicle’s electrical
components.
●
Do not leave cigarette lighters in the
vehicle. If a cigarette lighter is in a
place such as the glove box or on the
floor, it may be lit accidentally when
luggage is loaded or the seat is
adjusted, causing a fire.
●
Do not attach adhesive discs to the
windshield or windows. Do not place
containers such as air fresheners on
the instrument pane l or dashboard.
Adhesive discs or containers may act
as lenses, causing a fire in the vehicle. ●
Do not leave a door or window open if
the curved glass is coated with a met-
allized film such as a silver-colored
one. Reflected sunlight may cause the
glass to act as a lens, causing a fire. ●
Always apply the parking brake, shift
the shift position to P, stop the engine
and lock the vehicle.
Do not leave the vehicle unattended
while the engine is running.
If the vehicle is parked with the shift
position in P but the parking brake is
not set, the vehicle may start to move,
possibly leading to an accident. ●
Do not touch the exhaust pipes while
the engine is running or immediately
after turning the engine off.
Doing so may cause burns. ■
When taking a nap in the vehicle
Always turn the engine off. Otherwise, if
you accidentally move the shift lever or
depress the accelerator pedal, this could
cause an accident or fire due to engine
overheating. Additionally, if the vehicle is
parked in a poorly ventilated area,
exhaust gases may collect and enter the
vehicle, leading to death or a serious
health hazard. ■
When braking ●
When the brakes are wet, drive more
cautiously.
Braking distance in creases when the
brakes are wet, and this may cause one
side of the vehicle to brake differently
than the other side. Also, the parking
brake may not securely hold the vehi-
cle.
●
Vehicles without Lexus Safety System
+ A: If the brake booster device does
not operate, do not follow other vehi-
cles 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.

1654-2. Driving procedures
LS500_OM_(U)_1810 4
Driving while turning the steering wheel left and
right.
●
To prevent the steering lock motor from
overheating, operation of the motor may
be suspended if the engine is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the engine switch. After about 10 sec-
onds, the steering lock motor will resume
functioning.■
Electronic key battery
 P.399■
Operation of the engine switch●
If the switch is not pressed shortly and
firmly, the engine switch mode may not
change or the engine may not start.●
If attempting to restart the engine imme-
diately after turning the engine switch off,
the engine may not start in some cases.
After turning the engine switch off, please
wait a few seconds before restarting the
engine.■
Customization
If the smart access sy stem with push-button
start has been deactivated in a customized
setting, refer to P.433. 1 Stop the vehicle completely.
2 If the parking brake is in manual
mode, set the parking brake.
(  P.174)
3 Shift the shift position to P.
(  P.170) Check that the shift position indicator
shows P and the parking brake indicator is
illuminated.
4 Press the engine switch. The engine will stop, and the meter display
will be extinguished (the shift position indi-
cator will be extinguished a few seconds
after the meter display).
5 Release the brake pedal and check
that “ACCESSORY” or “IGNI-WARNING
■
When starting the engine
Always start the engine while sitting in
the driver’s seat. Do not depress the
accelerator pedal while starting the
engine under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury. ■
Caution while driving
If engine failure occurs while the vehicle
is moving, do not lock or open the doors
until the vehicle reaches a safe and com-
plete stop. Activation of the steering lock
in this circumstance may lead to an acci-
dent, resulting in death or serious injury.
NOTICE■
When starting the engine ●
Do not race a cold engine. ●
If the engine becomes difficult to start
or stalls frequently, have your vehicle
checked by your Lexus dealer immedi-
ately. ■
Symptoms indicating a malfunction
with the engine switch
If the engine switch seems to be operat-
ing somewhat differently than usual, such
as the switch sticking slightly, there may
be a malfunction. Contact your Lexus
dealer immediately.
Stopping the engine

1754-2. Driving procedures
LS500_OM_(U)_1810 4
Driving 2 Pull the switch to release the park-
ing brake• Operate the parking brake switch while
depressing the brake pedal.
• Using the parking brake automatic
release function, the parking brake can
be released by depressing the accelera-
tor pedal. When using this function,
slowly depress the accelerator pedal.
Make sure that the pa rking brake indicator
light turn off. ■
Turns automatic mode on
While the vehicle is stopped, press and
hold the parking brake switch until a
message is shown on the multi-infor-
mation display.
When the automatic mode is turned
on, the parking brake operates as fol-
lows.
 When the shift position is shifted
from P, the parking brake will be
released, and the parking brake
indicator light will turn off.
 When the shift position is shifted to
P, the parking brake will be set, and
the parking brake indicator light will
turn on.
Operate the shift lever and P position
switch with the vehicle stopped and the
brake pedal depressed. ■
Turns 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.
■
Parking brake operation ●
When the engine switch is not in IGNI-
TION ON mode, the parking brake can-
not be released using the parking brake
switch. ●
When the engine switch is not in IGNI-
TION ON mode, auto matic mode (auto-
matic brake setting an d releasing) is not
available. ■
Parking brake automatic release func-
tion ●
When the shift position is shifted from P,
the parking brake will be released in
automatic mode. ●
When all of the follo wing 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 position is in D, M or R
■
If “EPB Frequently Operated Wait a
Minute” is displayed on the multi-infor-
mation 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.

176 4-2. Driving procedures
LS500_OM_(U)_1810 ■
If “EPB Activation Stopped Incom-
pletely” or “EPB Unavailable” is dis-
played 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. ■
Parking brake operation sound
When the parking brake operates, a motor
sound (whirring sound) may be heard. This
does not indicate a malfunction. ■
Parking brake operation●
Depending on the engine switch mode,
the parking brake indi cator light will turn
on and stay on as described below:
IGNITION ON mode: Comes on until
the parking brake is released.
Not in IGNITION ON mode: Stays on
for approximately 15 seconds. ●
When the engine 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.■
When the parking brake switch mal-
functions
Automatic mode (automatic brake setting
and releasing) will be turned on automati-
cally. ■
Parking the vehicle
 P.154■
Parking 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])
■
If the brake system warning light comes
on
 P.415
■
Usage in winter time
 P.300 WARNING■
When 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■
When parking the vehicle
Before you leave the vehicle, set the
parking brake, shift the shift position to P
and make sure that the vehicle does not
move. ■
When the system malfunctions
Stop the vehicle in a safe place and
check the warning messages. ■
When 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.

330 5-3. Using the air conditioning system and defogger
LS500_OM_(U)_1810 passenger seat, the seat ventilator and seat
heater of the front pa ssenger’s seat will be
turned off if on. (  P.320)■
Customization
Some functions can be customized.
(  P.466)
WARNING■
To prevent overheating and minor
burn injuries
Observe the following precautions when
using the seat heaters. ●
Do not cover the seat with a blanket or
cushion when using the seat heater.●
Do not use seat heater more than nec-
essary.

440 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 1 Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
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 engine has cooled down
sufficiently, inspect the hoses and radiator core (radiator) for any
leaks.
Radiators
Cooling fan If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
 Engine
Reservoir
“F” line
“L” line
Coolant inlet cap
 IntercoolerIf your vehicle overheats The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge (  P.73, 76) is in the red
zone or a loss of engine power is
experienced. (For example, the
vehicle speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures A
B
A
B
C
D

498 Alphabetical Index
LS500_OM_(U)_1810 Brightness control
Instrument panel light control ........75, 79
BSM (Blind Spot Monitor)....................... 250
Buzzer
Hands off steering wheel alert (LTA)
............................................................. 236, 236 C
Card key ............................................................ 96
Care
Aluminum wheels ..................................... 358
Exterior .......................................................... 358
Interior ...............................................................361
Seat belts..........................................................361
Cargo capacity............................................... 162
Cargo net ....................................................... 340
Center Display ............................................. 306
Chains ............................................................... 301
Child restraint system
Fixed with a LATCH system .................. 53
Fixed with a seat belt................................... 49
Front passenger occupa nt classification
system ............................................................. 40
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation
method ........................................................... 46
Using an anchor bracket .......................... 55
Child safety
Airbag precautions...................................... 34
Battery precautions ....................... 381, 439
Child restraint system................................. 46
Heated steering wheel and seat heater
precautions................................................ 327
How your child should wear the seat belt
............................................................................ 25
Moon roof precautions ............................146
Panoramic moon roof precautions ... 150
Power window lock switch..................... 144
Power window precautions ................... 143
Rear door child-protectors ................... 103 Removed electronic key battery precau-
tions .............................................................. 400
Seat belt extender precautions.............. 25
Seat belt precautions .................................. 45
Trunk precautions....................................... 104
Child-protectors........................................... 103
Cleaning
Aluminum wheels ..................................... 358
Exterior........................................................... 358
Interior .............................................................. 361
Radar sensor .......................................192, 198
Seat belts ......................................................... 361
Clock ................................................ 73, 76, 345
Clock light ........................................................331
Coat hooks..................................................... 344
Coin holder .................................................... 337
Condenser ..................................................... 378
Console box .................................................. 338
Consumption screen ...................................... 91
Cooling system..............................................377
Engine overheating.................................. 440
Cornering lights .............................................. 181
Cruise control
Dynamic radar cruise control with
full-speed range .......................... 237, 247
Cup holders ................................................... 337
Current fuel consumption .......................... 82
Curtain shield airbags .................................. 29
Customizable features .............................. 466
D
Daytime running light system ................... 179
Defogger
Outside rear view mirrors.......................314
Rear window ..................................................314
Windshield ......................................................314
Differential
Front differential oi l............. ...................... 450
Rear differential oil. .................... ........... ...... 451
Dimension ...................................................... 446
Dinghy towing.................................................163