lexus LC500 2018 Repair Manual

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1-2. Child safety
For safety and security
(P.57)
Top strap
Hook
WARNING
■When installing a child restraint sys- tem
Observe the following precautions. Failure to do so may result in death or serious injury.
●Firmly attach the top strap and make
sure that the belt is not twisted.
●Do not attach the top strap to anything other than the anchor bracket.
●After securing a child restraint system, never adjust the seat.
●Follow all installation instructions pro-
vided by the child restraint system manufacturer.
NOTICE
■Anchor brackets (for top strap)
When not in use, make certain to close the lid. If it remains open, the lid may be damaged.
A
B

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1-3. Hybrid system
1-3.Hybrid system
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Electric motor (traction motor)
■When stopped/during start off
The gasoline engine stops* when the
vehicle is stopped. During start off, the
electric motor (traction motor) drives
the vehicle. When the accelerator
pedal is only lightly depressed, such as
when traveling on a level surface or
down a gentle slope, the engine is
stopped* and the electric motor (trac-
tion motor) is used.
When the shift position is in N, the
hybrid battery (traction battery) is not
Hybrid system features (LC500h)
Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely familiar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric motor
(traction motor) according to driving conditions, improving fuel efficiency and
reducing exhaust emissions.
In addition to the conventional system, exclusive control is performed for four
driving conditions (starting off, acce lerating, low-speed driving and high-
speed cruising) to optimize the drive force and fuel efficiency, allowing for a
more powerful drive and a higher fuel efficiency.
System components
A
B

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1-3. Hybrid system
For safety and security
being charged.
*: When the hybrid battery (traction bat-
tery) requires charging or the engine is
warming up, etc., the gasoline engine will
not automatically stop.
■During normal driving
The gasoline engine is predominantly
used. The electric motor (traction
motor) charges the hybrid battery
(traction battery) as necessary.
■When accelerating sharply
When the accelerator pedal is
depressed heavily, the power of the
hybrid battery (traction battery) is
added to that of the gasoline engine via
the electric motor (traction motor).
■When braking (regenerative brak-
ing)
The wheels operate the electric motor
(traction motor) as a power generator,
and the hybrid battery (traction bat-
tery) is charged.
■Regenerative braking
In the following situations, kinetic energy is
converted to electric energy and decelera- tion force can be obtained in conjunction with the recharging of the hybrid battery
(traction battery).
●The accelerator pedal is released while
driving with the shift position in D or M.
●The brake pedal is depressed while driv-
ing with the shift position in D or M.
■EV indicator
The EV indicator comes on when the vehi-
cle is driven using only the electric motor (traction motor) or the gasoline engine is stopped.
■Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops auto- matically. However, it may not stop auto-
matically in the following conditions*:
●During gasoline engine warm-up
●During hybrid battery (traction battery) charging
●When the temperature of the hybrid bat-tery (traction battery) is high or low
●When the heater is switched on
●When the shift position is in M*: Depending on the circumstances, the
gasoline engine may also not stop auto-
matically in other situations.
■Charging the hybrid battery (traction battery)
As the gasoline engine charges the hybrid battery (traction battery), the battery does
not need to be charged from an outside source. However, if the vehicle is left parked for a long time the hybrid battery (traction
battery) will slowly discharge. For this rea- son, be sure to drive the vehicle at least once every few months for at least 30 min-
utes or 16 km (10 miles). If the hybrid bat- tery (traction battery) becomes fully discharged and you are unable to start the
hybrid system, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■Charging the 12-volt battery
 P.398
■After the 12-volt battery has discharged or when the terminal has been removed
and installed during exchange, etc.
The gasoline engine may not stop even if

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1-3. Hybrid system
the vehicle is being driven by the hybrid bat- tery (traction battery). If this continues for a few days, contact any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to move with
the “READY” indicator is illuminated. For safety, apply the parking brake and make sure to shift the shift position to P when
parked.
The following sounds or vibrations may
occur when the hybrid system is operating and are not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats when the hybrid system starts or
stops.
●Relay operating sounds such as a snap or
soft clank will be emitted from the hybrid battery (traction battery), behind the rear seats, when the hybrid system is started
or stopped.
●Sounds from the hybrid system may be heard when the trunk lid is open.
●Sounds may be heard from the transmis-sion when the gasoline engine starts or stops, when driving at low speeds, or
during idling.
●Engine sounds may be heard when
accelerating sharply.
●Sounds may be heard due to regenera-
tive braking when the brake pedal is depressed or as the accelerator pedal is released.
●Vibration may be felt when the gasoline engine starts or stops.
●Cooling fan sounds may be heard from the air intake vents under the rear seats.
■Maintenance, repair, recycling, and dis-
posal
Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable
repairer regarding maintenance, repair, recycling and disposal. Do not dispose of the vehicle yourself.
■Customization
Settings (e.g. on/off operation of the EV indicator) can be changed.
(Customizable features: P.423)

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1-3. Hybrid system
For safety and security
The illustration is an example for explanation and may differ from the actual item.
Warning label
Power control unit
Electric motor (traction motor)
Hybrid battery (traction battery)
Service plug
High voltage cables (orange)
Air conditioning compressor
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to make the low fuel level warning light ( P.373) go off. If there is only a small
amount of fuel, the hybrid system may not
be able to start. (The standard amount of fuel is about 12.1L [3.2 gal., 2.7 Imp.gal.], when the vehicle is on a level surface. This
value may vary when the vehicle is on a slope. Add extra fuel when the vehicle is inclined.)
Hybrid system precautions (LC500h)
Take care when handling the hybrid system , as it is a high voltage system (about
650 V at maximum) as well as contains parts that become extremely hot when
the hybrid system is operating. Obey the warning labels attached to the vehi-
cle.
System components
A
B
C
D
E
F
G

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1-3. Hybrid system
■Electromagnetic waves
●High voltage parts and cables on hybrid
vehicles incorporate electromagnetic shielding, and therefore emit approxi-mately the same amount of electromag-
netic waves as conventional gasoline powered vehicles or home electronic appliances.
●Your vehicle may cause sound interfer-ence in some third party-produced radio
parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery) has a
limited service life. The lifespan of the hybrid battery (traction battery) can change in accordance with driving style and
driving conditions.
■Starting the hybrid system in an extremely cold environment
When the hybrid battery (traction battery) is extremely cold (below approximately -30°C [-22°F]) under the influence of the
outside temperature, it may not be possible to start the hybrid system. In this case, try to start the hybrid system again after the tem-
perature of the hybrid battery increases due to the outside temperature increase etc.
■Declaration of conformity
This model conforms to hydrogen emis- sions according to regulation ECE100
(Battery electric vehicle safety).
WARNING
■High voltage precautions
This vehicle has high voltage DC and AC systems as well as a 12-volt system. DC and AC high voltage is very dangerous
and can cause severe burns and electric shock that may result in death or serious injury.
●Never touch, disasse mble, remove or
replace the high voltage parts, cables or their connectors.
●The hybrid system will become hot after starting as the system uses high
voltage. Be careful of both the high voltage and the high temperature, and always obey the warning labels
attached to the vehicle.
●Never try to open the service plug access hole located behind the rear seats. The service plug is used only
when the vehicle is serviced and is subject to high voltage.
■Road accident cautions
Observe the following precautions to
reduce the risk of death or serious injury:
●Stop the vehicle in a safe place to pre- vent subsequent accidents. While depressing the brake pedal, apply the
parking brake and shift the shift posi- tion to P to stop the hybrid system.
Then, slowly release the brake pedal.
●Do not touch the high voltage parts, cables and connectors.
●If electric wires are exposed inside or outside your vehicle, an electric shock
may occur. Never touch exposed elec- tric wires.

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1-3. Hybrid system
For safety and security
WARNING
●Do not touch the battery if liquid is leaking from or adhering to it.If electrolyte (carbonic-based organic
electrolyte) from the hybrid battery (traction battery) comes into contact with the eyes or skin, it could cause
blindness or skin wounds. In the unlikely event that it comes into con-tact with the eyes or skin, wash it off
immediately with a large amount of water, and seek immediate medical attention.
●If electrolyte is leaking from the hybrid
battery (traction battery), do not approach the vehicle.Even in the unlikely event that the
hybrid battery (traction battery) is damaged, the internal construction of the battery will prevent a large amount
of electrolyte from leaking out. How- ever, any electrolyte that does leak out will give off a vapor. This vapor is an
irritant to skin and eyes and could cause acute poisoning if inhaled.
●Do not bring burning or high-tem-perature items close to the electrolyte.
The electrolyte may ignite and cause a fire.
●If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible.
Never use a fire extinguisher that is not meant for electric fires. Using even a small amount of water may be danger-
ous.
●If your vehicle needs to be towed, do so with rear wheels raised. If the wheels connected to the electric
motor (traction motor) are on the ground when towing, the motor may continue to generate electricity. This
may cause a fire. ( P.362)
●Carefully inspect the ground under the vehicle. If you find that liquid has leaked onto the ground, the fuel sys-
tem may have been damaged. Leave the vehicle as soon as possible.
■Hybrid battery (traction battery)
●Your vehicle contains a sealed lithium-ion battery.
●Never resell, hand over or modify the hybrid battery. To prevent accidents,
hybrid batteries that have been removed from a disposed vehicle are collected through any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer. Do not dispose of the battery yourself.
Unless the battery is properly col- lected, the following may occur, result-ing in death or serious injury:
• The hybrid battery may be illegally dis- posed of or dumped, and it is hazard-
ous to the environment or someone may touch a high voltage part, result-ing in an electric shock.
• The hybrid battery is intended to be used exclusively with your hybrid vehi-
cle. If the hybrid battery is used outside of your vehicle or modified in any way, accidents such as electric shock, heat
generation, smoke generation, an explosion and electrolyte leakage may
occur.
When reselling or handing over your
vehicle, the possibility of an accident is
extremely high because the person
receiving the vehicle may not be aware
of these dangers.
●If your vehicle is disposed of without
the hybrid battery having been removed, there is a danger of serious electric shock if high voltage parts,
cables and their connectors are touched. In the event that your vehicle must be disposed of, the hybrid battery
must be disposed of by any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer. If the
hybrid battery is not disposed of prop- erly, it may cause electric shock that can result in death or serious injury.

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1-3. Hybrid system
There are air intake vents under the
rear seats for the purpose of cooling
the hybrid battery (traction battery). If
the vents become blocked, the hybrid
battery input and output may be
restricted, leading to a reduction in
hybrid battery (traction battery) out-
put.
When a certain level of impact is
detected by the impact sensor, the
emergency shut off system blocks the
high voltage current and stops the fuel
pump to minimize the risk of electrocu-
tion and fuel leakage. If the emergency
shut off system activates, your vehicle
will not restart. To restart the hybrid
system, contact any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer.
A message is automatically displayed
when a malfunction occurs in the
hybrid system or an improper opera-
tion is attempted.
If a warning message is shown on the
multi-information display, read the
NOTICE
■Hybrid battery (traction battery)
Do not carry large amounts of water
such as water cooler bottles in the vehi- cle. If water spills onto the hybrid battery (traction battery), the battery may be
damaged. Have the vehicle inspected by any authorized Lexu s retailer or Lexus authorized repairer, or any reliable
repairer.
Hybrid battery (traction bat-
tery) air intake vents
NOTICE
■Hybrid battery (traction battery) air intake vents
●Make sure not to block the air intake vents with anything, such as a seat cover, plastic cover, or luggage. If the
vents become blocked, the hybrid bat- tery (traction battery) input and output may be restricted, leading to a reduc-
tion in hybrid battery (traction battery) output and a malfunction.
●When dust etc. has accumulated in the air intake vents, periodically clean
them with a vacuum cleaner to prevent the vents from clogging.
●Filters are installed to the air intake vents. When the filters remain notice-
ably dirty even after cleaning the air intake vents, filter cleaning or replace-ment is recommended. When clean-
ing or replacing the filters, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer. Refer to P.309 for details on how to clean the filters.
●Do not get water or foreign materials
in the air intake vents as this may cause a short circuit and damage the hybrid battery (traction battery).
Emergency shut off system
Hybrid warning message

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1-3. Hybrid system
For safety and security
message and follow the instructions.
■If a warning light comes on, a warning
message is displayed, or the 12-volt bat- tery is disconnected
The hybrid system may not start. In this case, try to start the system again. If the “READY” indicator does not come on, con-
tact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.

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1-4. Theft deterrent system
1-4.Theft deterrent system
The indicator light flashes after the
engine switch has been
turned off to indicate that the system is
operating.
The indicator light stops flashing after
the engine switch has
been turned to ACCESSORY or
IGNITION ON mode to
indicate that the system has been can-
celed.
■System maintenance
The vehicle has a maintenance-free type
engine immobilizer system .
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touch-ing a key registered to the security sys-
tem (key with a built-in transponder chip) of another vehicle
Engine immobilizer system

The vehicle’s keys have built-in tran-
sponder chips that prevent the
engine from start-
ing if a key has not been previously
registered in the vehicle’s on-board
computer.
Never leave the keys inside the
vehicle when you leave the vehicle.
This system is designed to help pre-
vent vehicle theft but does not guar-
antee absolute security against all
vehicle thefts.
Operating the system