2018 Lexus LC500 coolant

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7-2. 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
WARNING
■After recharging the 12-volt battery
Have the 12-volt battery inspected at any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer as soon as possible. If the 12-volt battery is deteriorating, continued use may cause the 12-volt battery to emit a
malodorous gas, which may be detri- mental to the health of passengers.
■When exchanging the 12-volt battery
After exchanging, securely attach the exhaust hose and exhaust hole plug to
the exhaust hole of the exchanged 12- volt battery. If not properly installed, gases (hydrogen) may leak into the vehi-
cle interior, and there is the possible dan- ger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-gled in the cooling fan or engine drive
belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to be used when charging the 12-volt bat-tery from another vehicle in an emer-
gency. It cannot be used to jump start another vehicle.
If your vehi cle overheats
(LC500)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.88) 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

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7-2. Steps to take in an emergency
When trouble arises
radiator core (radiator) for any
leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.
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
coolant is unavailable.
6 Start the engine 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 operate in freezing tem-
peratures.)
7 If the fan is not operating:
Stop the engine immediately and
contact any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the
nearest authorized Lexus retailer
or Lexus authorized repairer, or any
reliable repairer.
■When adding coolant
Add coolant in accordance with the follow- ing procedure.
1 Remove the service cover.
A
B
A
B
C
D

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7-2. Steps to take in an emergency
2 Remove the engine cover.
3 Remove the caps and .
4 Add coolant through the inlet of the cap
up to the “F” line , and then
replace the cap .
5 Add coolant through the inlet of the cap
until it is full, and then replace the
cap .
AB
AC
A
B
B
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions. Failure to do so may result in serious
injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the steam has subsided. The engine com-
partment may be very hot.
●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.

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7-2. Steps to take in an emergency
When trouble arises
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.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.
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
(LC500h)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.88) enters 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
Overheated Reduced Output
Power” is shown on the multi-
information display.
 Steam comes out from under the
hood.
Correction procedures
A
B
A
B
C
D

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7-2. Steps to take in an emergency
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 operate in freezing tem-peratures.)
7 If the fan is not operating:
Stop the hybrid system immediately
and contact any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the
nearest any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
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.
3 After 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 any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.
4 The coolant level is satisfactory if it
is between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir.
Reservoir
A
B
A

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7-2. Steps to take in an emergency
When trouble arises
“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 any authorized Lexus retailer or Lexus autho-rized repairer, or any reliable repairer.
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 any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■When adding engine coolant
Add coolant in accordance with the follow- ing procedure.
1 Remove the service cover.
2 Remove the engine cover.
3 Remove caps and .
4 Add coolant through the inlet of the cap
up to the “F” line , and then
replace the cap .
5 Add coolant through the inlet of cap
until it is full, and then replace the
cap .
B
C
AB
AC
A
B
B

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7-2. Steps to take in an emergency
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions. Failure to do so may result in serious
injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the steam has subsided. The engine com-
partment may be very hot.
●After the hybrid system has been turned off, check that the “READY” indicator is off.
When the hybrid system is operating, the gasoline engine may automatically start, or the cooling fan may suddenly
operate even if the gasoline engine stops. Do not touch or approach rotat-ing parts such as the fan, which may
lead to fingers or clothing (especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
●Do not loosen the coolant inlet cap or
coolant reservoir caps while the hybrid system and radiator are hot.High temperature steam or coolant
could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid sys- tem has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too quickly can cause damage to the hybrid system.
■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.

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8-1. Specifications
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact any auth orized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
■Spark plug
■12-volt battery
Cooling system
Capacity*
LC50012.1 L (12.8 qt., 10.6 Imp.qt.)
LC500h
Gasoline engine
10.9 L (11.5 qt., 9.6 Imp.qt.)
Power control unit
2.3 L (2.4 qt., 2.0 Imp.qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology
Do not use plain water alone.
Ignition system
LC500LC500h
MakeDENSO FK20HBR-J8DENSO FK20HBR8
Gap0.8 mm (0.031 in.)0.8 mm (0.031 in.)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
Specific gravity reading at 20°C
(68°F):1.250 or higher