Page 364 of 432

3647-2. 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
Page 366 of 432

3667-2. 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
●Keep hands and clothing (especially a
tie, a scarf or a muffler) away from the
fan and belts. Failure to do so may
cause the hands or clothing to be
caught, resulting in serious injury.
●While the engine and radiator are hot,
do not loosen or remove the coolant
inlet cap or coolant reservoir cap.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●Do not use any coolant additive.
If your vehicle overheats
(LC500h)
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 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
Overheated Reduced Output
Power” is shown on the multi-
information display.
Steam comes out from under the
hood.
Correction procedures
Page 367 of 432

3677-2. Steps to take in an emergency
7
When trouble arises
3After the hybrid system has cooled
down sufficiently, inspect the hoses
and cooling system for leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The 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.
6
Start the hybrid system and turn the
air conditioning system on to check
that the radiator cooling fan oper-
ates and to check for coolant leaks
from the radiator or hoses.
The fan operates when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fan is operating
by checking the fan sound and air flow. If it
is difficult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fan may not oper ate in freezing tem-
peratures.)
7 If the fan is not operating:
Stop the hybrid system immediately
and contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the
nearest Lexus dealer.
If “Hybrid System Overheated
Reduced Output Power” is shown
on the multi-information display
1 Stop the vehicle in a safe place.
2 Stop the hybrid system and care-
fully lift the hood.
A
B
A
B
C
D
Page 368 of 432

3687-2. Steps to take in an emergency
3After the hybrid system has cooled
down, inspect the hoses and radia-
tor core (radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir.
Reservoir
“F”/“FULL” line
“L”/“LOW” line
5 Add coolant if necessary.
Water can be used in an emergency if power control unit coolant is unavailable.
6
After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check if “Hybrid System Over-
heated Reduced Output Power” is
shown on the multi-information dis-
play.
If the message does not disappear:
Stop the hybrid system and contact your
Lexus dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be driven
normally.
However, if the message appears again fre-
quently, contact your Lexus dealer.
■When adding engine coolant
Add coolant in accordance with the follow-
ing procedure.
1 Remove the service cover.
2 Remove the engine cover.
A
B
A
B
C
Page 392 of 432
3928-2. Customization
Settings that can be changed using the meter control switches
Settings that can be changed by your Lexus dealer
Definition of symbols: O = Available, = Not available
■Gauges, meters and multi-information display ( P.74, 80, 84)
Function*1Default settingCustomized setting
LanguageEnglishFrench
O*6OSpanish
Units*2miles (MPG)
km (km/L)
O*6Okm (L/100 km)
miles (MPG Impe-
rial)
Eco Driving Indicator Light*3OffOn
(Self-lighting)O
EV indicator*4On
(Self-lighting)OffO
Drive information 1
Current fuel economy
*5OAverage fuel economy
(after reset)
Drive information 2
Distance
(driving range)
*5OAverage vehi- cle speed
(after reset)
Pop-up displayOnOffO
Ring position memoryOnOffO
Accent colorColor 1Color 2O*6O
Rev indicatorOffOnO
Rev indicator red zone setting5000 r/min.*3
4000 r/min.*4
2000 - 7300
r/min.
*3
2000 - 6600
r/min.
*4
O
B
C
ABC
Page 393 of 432

3938-2. Customization
8
Vehicle specifications
*1: For details about each function: P.80, 88
*2: The default setting varies according to country.
*3:LC500
*4: LC500h
*5: 2 of the following items: current fuel cons umption, average fuel economy (after reset),
average fuel economy (after start), average fuel economy (after refuel), average vehicle
speed (after reset), average vehicle speed (after start), elapsed time (after reset),
elapsed time (after start), distance (driving range), distance (after start), blank.
*6: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.
■HUD (Head-up Display)*1 ( P.90)
Rev peakOffOnO
Clock12-hour display24-hour displayO
Sensor sensitivity for darkening the
brightness of the instrument cluster
depending on the outside bright-
ness
Standard-2 to 2O
Sensor sensitivity for returning the
brightness of the instrument cluster
to the original level depending on
the outside brightness
Standard-2 to 2O
Suggestion functionOn
On
(when the vehicle is stopped)
OO
Off
FunctionDefault settingCustomized setting
Gauge informationTachometer
Eco Driving Indica-
tor Light
*2
OHybrid System Indi-
cator
*3
No display
Driving support display (Naviga-
tion system)OnOffO
Function*1Default settingCustomized settingABC
ABC
Page 394 of 432
3948-2. Customization
*1: If equipped
*2:LC500
*3: LC500h
■LKA (Lane-Keeping Assist) (P.196)
■PCS (Pre-Collision System) ( P.189)
■BSM (Blind Spot Monitor)*1 ( P.220)
Driving support display (Lane dis-
play)OnOffO
Driving support display (Driving
assist)OnOffO
Driving support display (Compass)OnOffO
Driving support display (Audio)OnOffO
FunctionDefault settingCustomized setting
Lane centering functionOffOnO
Steering assistOnOffO
Alert sensitivityStandardHighO
Vehicle sway warningOnOffO
Vehicle sway warning sensitivityStandardLowOHigh
FunctionDefault settingCustomized setting
PCS (Pre-Collision System)OnOffO
Adjust alert timingMiddleFarONear
FunctionDefault settingCustomized setting
BSM (Blind Spot Monitor)OnOffO
RCTA (Rear Cross Traffic Alert)OnOffO
Outside rear view mirror indicator
brightnessBrightDimO
FunctionDefault settingCustomized settingABC
ABC
ABC
ABC
Page 419 of 432

419What to do if... (Troubleshooting)
It is locked automatically to prevent
theft of the vehicle. ( P.147, 150)
Is the window lock switch pressed?
The power window at the passenger’s seat
cannot be operated if the window lock
switch is pressed. ( P.133)
The auto power off function will be
operated if the vehicle is left in
ACCESSORY or IGNITION ON
mode (the engine is
not running
operating>) for a period of time.
( P.149, 152)
The seat belt reminder light is flash-
ing
Are the driver and the passengers wearing
the seat belts? ( P.339)
The parking brake indicator is on
Is the parking brake released? ( P.168)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.335, 344)
Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds.
(
P.71)
To stop the alarm, turn the engine
switch to IGNITION
ON mode , or start the
engine .
Is the electronic key left inside the
vehicle?
Check the message on the multi-informa-
tion display. ( P.344)
When a warning light turns on or a
warning message is displayed, refer
to P.335, 344.
Slow down the vehicle, drive with
extra caution, and take your vehicle
to the nearest Lexus dealer or
authorized tire dealer as soon as
possible to have the tire replaced.
( P.350)
Try the procedure for when the vehi-
cle becomes stuck in mud, dirt, or
snow. ( P.370)
The windows do not open or
close by operating the power
window switches
The engine switch
switch> is turned off automati-
cally
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck