coolant temperature lexus LC500h 2020 Owner's Manual / LEXUS 2020 LC500,LC500H OWNER'S MANUAL (OM11537U)

752-1. Instrument cluster
2
Vehicle status information and indicators
Warning lights inform the driver of mal-
functions in the indicated vehicle sys-
tems.
*1: These lights turn on when the engine switch is turned to
IGNITION ON mode to
indicate that a system check is being
performed. They will turn off after the
engine is started, or
Warning lights
(U.S.A.)
Brake system warning light*1
(  P.339)
(red)
(Canada)
Brake system warning light*1
(  P.339)
Charging system warning
light
*2 (  P.339)
Low engine oil pressure
warning light
*2 (  P.339)
(U.S.A.)
Malfunction indicator lamp*1
(  P.340)
(Canada)
Malfunction indicator lamp*1
(  P.340)
SRS warning light
*1
(  P.340)
(U.S.A.)
ABS warning light*1
(  P.340)
(Canada)
ABS warning light*1
(  P.340)
(red)
Electric power steering sys-
tem warning light
*1 ( P.340)
(yellow)
Electric power steering sys-
tem warning light
*1 ( P.340)
PCS warning light
*1, 3
(  P.341)
(orange)
LKA indicator*2 ( P.341)
Slip indicator*1 ( P.341)
Brake Override System
warning light
(  P.342)/Drive-Start Con-
trol warning light
*2 (  P.342)
Brake hold operated indica-
tor
*1, 3 (  P.342)
(U.S.A.)
Parking brake indicator*3
(  P.342)
(Canada)
Parking brake indicator*3
(  P.342)
(yellow)
Brake system warning light*1
(  P.343)
Low fuel level warning light
(  P.343)
Driver’s and front passen-
ger’s seat belt reminder light
(  P.343)
Rear passengers’ seat belt
reminder lights
*4 (  P.344)
Master warning light
*1
(  P.344)
Tire pressure warning light
*1, 3
(  P.344)
High coolant temperature
warning light
*2 (  P.344)
(if equipped)
Hybrid system overheat
warning light
*2( P.345)

812-1. Instrument cluster
2
Vehicle status information and indicators
Displays the outside temperature within the range of -40°F (-40°C) to 122°F (50°C)
Low outside temperature indicator comes on when the ambient temperature is 37°F (3°C)
or lower
Tachometer
Displays the engine speed in revolutions per minute
Speedometer
Shift position/shift range/gear position ( P.157, 163)
Shift position indicator ( P.159, 165)
Clock
Time displayed is linked to the analog clock on the instrument panel. (P.268)
Engine coolant temperature gauge
Displays the engine coolant temperature
If the engine coolant temperature gauge indicator enters the red zone, a buzzer sounds
and the high coolant temperature warning light comes on
Odometer and trip meter display
Odometer:
Displays the total distance the vehicle has been driven
Trip meter:
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
Fuel gauge
Displays the quantity of fuel remaining in the tank
Multi-information display
Presents the driver with a variety of vehicle data ( P.84)
Displays warning messages in case of a malfunction (P.348)
Motor power display/Hybrid System Indicator (LC500h)
Displays the motor power display ( P.79) or Hybrid System Indicator ( P.78)
■Rev indicator
When the engine speed reaches a set
speed or the red zone, a ring-shaped
indicator will be displayed on the
tachometer.
The indicators will be displayed in
amber ( ) when the engine speed
reaches a set speed, and in red ( ) when the engine speed reaches the
red zone. This setting can be enabled
on the multi-information display.
(
P.89)
C
D
E
F
G
H
I
J
K
L
A
B

822-1. Instrument cluster
■Rev peak
When the engine speed reaches or
exceeds the following, an afterimage of
the tachometer will be displayed at the
highest engine speed for approxi-
mately 1 second.
LC500: 3600 r/min
LC500h: 4000 r/min
■The meters and display illuminate when
The engine switch is in
IGNITION ON mode .
■Variable red zone (LC500)
To help protect the engine, the engine
speed is controlled by starting the red zone
of the tachometer at different engine
speeds ranging from 3700 rpm to 7300
rpm depending on the engine coolant tem-
perature.
Before driving under extremely high load
conditions, make sure to sufficiently warm
up the engine.
■Instrument panel brightness adjustment
The brightness of the instrument panel
lights is automatically adjusted based on the
light sensor detectin g how bright the sur-
roundings are.
■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.
■Speed unit setting for the speedometer
When the speed unit has been changed
from the default setting, the vehicle speed in
the default unit is also displayed in the
meter.
■Pop-up display
●In some situations, su ch as when a switch
operation is performed, a pop-up display
will be temporarily displayed on the
multi-information display.
●Some pop-up displays can be set on/off.
(  P.88)

832-1. Instrument cluster
2
Vehicle status information and indicators
■Liquid crystal display
Small spots or light spots may appear on the
display. This phenomenon is characteristic
of liquid crystal displays, and there is no
problem continuing to use the display.
■Customization
The meter display can be customized on
the multi-information display. ( P.395)
The odometer and trip meter displays
can be switched. When the trip meter
is displayed, pressing and holding the
button will reset the trip meter. The brightness of the instrument panel
lights can be adjusted.
1
Darker
2 Brighter
■Instrument panel brightness adjustment
The instrument panel brightness levels
when the tail lights are on and off can be
adjusted individually. However, when the
surroundings are bright (daytime, etc.),
turning on the tail lights will not change the
instrument pa nel brightness.
The display can be switched between
the center and side positions.
NOTICE
■To prevent damage to the engine and
its components
●Do not let the indicator of the tachom-
eter enter the red zone, as it rep-
resents the engine speed range which
exceeds the maximum safe engine
speed.
●In the following situations, the engine
may be overheating. In this case,
immediately stop the vehicle in a safe
place, and check the engine after it has
cooled completely. ( P.368, 370)
• The engine coolant temperature gauge is in the red zone (H).
• LC500: The engine oil temperature gauge is in the red zone (H).
Changing between the odome-
ter and trip meter
Changing the Instrument panel
light brightness
Changing the display

2424-6. Driving tips
Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
• Engine coolant
• Power control unit coolant (LC500h)
•Washer fluid
Have a service technician inspect
the condition of the 12-volt battery.
 Have the vehicle fitted with four
snow tires.
Ensure that all tires are the specified size
and the same brand.
Perform the following according to the
driving conditions:
Do not try to forcibly open a window
or move a wiper that is frozen. Pour
warm water over the frozen area to
melt the ice. Wipe away the water
immediately to prevent it from
freezing.
 When the outside door handle is
frozen, unlock the doors using the
wireless remote control. If the out-
side door handles remain retracted
and do not move even if the doors
are unlocked using the wireless
remote control, pour warm water
over the frozen area to melt the ice
and wipe away the water immedi-
ately to prevent it from freezing. The
outside door handle may not retract
due to ice, however, the outside
door handle will return to the nor-
mal position after the ice melts.
 To ensure proper operation of the
climate control system fan, remove
Winter driving tips
Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
■Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●Use tires of the specified size.
●Maintain the recommended level of air
pressure.
●Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used.
●Use snow tires on all, not just some
wheels.
NOTICE
■Driving with tire chains
Do not fit tire chains. Tire chains may
damage the vehicle body and suspen-
sion, and adversely affect driving perfor-
mance.
■Repairing or replacing snow tires
Request repairs or replacement of snow
tires from Lexus dealers or legitimate tire
retailers.
This is because the removal and attach-
ment of snow tires affects the operation
of the tire pressure warning valves and
transmitters.
Before driving the vehicle

2936-3. Do-it-yourself maintenance
6
Maintenance and care
Engine oil level
( P.297)
• “Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.323)•Fuse with same amper-
age rating as original
Headlight aim• Phillips-head screw-driver
Light bulbs
( P.328)
Radiator and
condenser
( P.301)

Tire inflation
pressure
( P.317)• Tire pressure gauge
• Compressed air source
Washer fluid
( P.302)
• Water or washer fluid
containing antifreeze
(for winter use)
• Funnel (used only for adding water or washer
fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●LC500h: Make sure that the “IGNI-
TION ON” on the multi-information
display and the “READY” indicator are
both off.
●Keep hands, clothi ng and tools away
from the moving fan and engine drive
belt.
ItemsParts and tools●LC500: Be careful not to touch the
engine, radiator, exhaust manifold, etc.
right after driving as they may be hot.
Oil and other fluids may also be hot.
LC500h: Be careful not to touch the
engine, power control unit, radiator,
exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other
fluids may also be hot.
●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose
an open flame to fuel. Fuel fumes are
flammable.
■When working near the electric cool-
ing fan or radiator grille
Be sure the engine switch switch> is off.
With the engine switch in
IGNITION ON mode , the
electric cooling fan may automatically
start to run if the air conditioning is on
and/or the coolant temperature is high.
(  P.301)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.

3016-3. Do-it-yourself maintenance
6
Maintenance and care
and non-borate coolant with long-life
hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mix-
ture of 50% coolant and 50% deionized
water. (Minimum temperature: -31°F [-
35°C])
Canada:
“Toyota Super Long Life Coolant” is a mix-
ture of 55% coolant and 45% deionized
water. (Minimum temperature: -44°F [-
42°C])
For more details about engine coolant, con-
tact your Lexus dealer.
■If the coolant level drops within a short
time of replenishing
Visually check the radiator, hoses,
engine/power control unit coolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have your Lexus
dealer test the cap and check for leaks in
the cooling system.
Check the radiator and condenser and
clear away any foreign objects.
If either of the above parts is extremely
dirty or you are not sure of their condi-
tion, have your vehicle inspected by
your Lexus dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
WARNING
■When the engine is
hot
LC500: Do not remove the engine cool-
ant reservoir cap or th e coolant inlet cap.
(  P.370)
The cooling system may be under pres-
sure and may spray hot coolant if the cap
is removed, causing serious injuries, such
as burns.
LC500h: Do not remove the
engine/power control unit coolant reser-
voir caps or the coolant inlet cap.
(  P.373)
The cooling system may be under pres-
sure and may spray hot coolant if the cap
is removed, causing serious injuries, such
as burns.
NOTICE
■When adding coolant
Coolant is neithe r plain water nor
straight antifreeze. The correct mixture
of water and antifreeze must be used to
provide proper lubrication, corrosion
protection and cooling. Be sure to read
the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to pre-
vent it from damaging parts or paint.
Checking the radiator and con-
denser
WARNING
■When the engine is
hot
Do not touch the radiator or condenser
as they may be hot and cause serious
injuries, such as burns.
Checking and adding the brake
fluid

3377-2. Steps to take in an emergency
7
When trouble arises
Fluid leaks under the vehicle. (Water
dripping from the air conditioning
after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
continually points higher than nor-
mal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking 
Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong
If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

3447-2. Steps to take in an emergency
■Rear passengers’ seat belt reminder lights (warning buzzer*1)*2
*1: Rear passenger’s seat belt buzzer:
The rear passenger’s seat belt buzzer sounds to alert the rear passenger that his or her seat
belt is not fastened. The buzzer sounds for 6 seconds if the vehicle reaches a speed of 12
mph (20 km/h). Then, if the seat belt is still un fastened, the buzzer will sound in a different
tone for 24 more seconds.
*2: This light illuminates on the center panel.
■Master warning light (warning buzzer)
■Tire pressure warning light
■High coolant temperature warning light (warning buzzer)*
Warning lightDetails/Actions
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
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.348
Warning lightDetails/Actions
When the light comes on:
Low tire inflation pressure such as
Natural causes ( P.346)
 Flat tire ( P.354)
 Adjust the tire inflation pressure to the specified level.
The light will turn off after a few mi nutes. In case the light does not
turn off even if the tire inflation pressure is adjusted, have the sys-
tem checked by your Lexus dealer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.
Warning lightDetails/Actions
Changes from a flashing to a solid light when the engine coolant tem-
perature increases
Immediately stop the vehicle in a safe place.
Handling method. ( P.368, 370)

3687-2. Steps to take in an emergency
1Stop 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.
Radiator
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.
Reservoir
“F” line
“L” line
Coolant inlet cap
5 Add coolant if necessary.
Water can be used in an emergency if
If your vehicle overheats
(LC500)
The following may indicate that
your vehicle is overheating.
The engine coolant temperature
gauge ( P.80) is in the red zone
or a loss of engine power is expe-
rienced. (For example, the vehicle
speed does not increase.)
 “Engine Coolant Temp High” is
shown on the multi-information
display.
 Steam comes out from under the
hood.
Correction procedures
A
B
A
B
C
D