2018 LEXUS LS500H ECU

56 1-2. Child safety
LS500h_OM_OM50F42U_(U) 
Outboard rear seats
Anchor brackets
Top tether strap 
Rear center seat
Anchor bracket
Top tether strap ■
Fixing the top tether strap to the
anchor bracket
Install the child restraint system in
accordance to the operation manual
enclosed with the child restraint sys-
tem.
Open the anchor bracket cover, latch
the hook onto the anchor bracket and
tighten the top tether strap. Make sure the top tether strap is securely
latched. ( → P.53) 
Outboard rear seats
Hook
Top tether strap 
Rear center seat
Hook
Top tether strap ■
Laws and regulations pertaining to
anchors
The LATCH system conforms to
FMVSS225 or CMVSS210.2.
Child restraint systems conforming to
FMVSS213 or CMVSS213 specifications
can be used.
This vehicle is designed to conform to SAE
J1819.A
B
A
B
WARNING
■
When installing a child restraint sys-
tem
Observe the following precautions.
Failure to do so may result in death or
serious injury. A
B
A
B

571-2. Child safety
LS500h_OM_OM50F42U_(U) 1
For safety and security WARNING●
Firmly attach the top tether strap and
make sure that the belt is not twisted.●
Do not attach the top tether 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.●
Be sure to have the top tether strap
pass over the top of the head restraint.
If the belt passes below the head
restraint, it is possible that the child
restraint system may not be securely
fixed.
NOTICE■
Anchor brackets (for top tether
strap)
When not in use, make certain to close
the lid. If it remains open, the lid may be
damaged.

591-3. Hybrid system
LS500h_OM_OM50F42U_(U) 1
For safety and security (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 obta ined 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 th e 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 gaso-
line engine may also not stop automatically
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 10 miles (16 km ). If the hybrid bat-
tery (traction battery) becomes fully
discharged and you are unable to contact
your Lexus dealer. ■
Charging the 12-volt battery
→ P.447 ■
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
the vehicle is being driven by the hybrid bat-
tery (traction battery). If this continues for a
few days, contact your Lexus dealer. ■
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.
●
Relay operating sounds such as a snap or
soft clank will be em itted from the hybrid
battery (traction battery), behind the rear

611-3. Hybrid system
LS500h_OM_OM50F42U_(U) 1
For safety and security
The illustration is an example for explana-
tion 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.430) 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 3.4 gal. [13 L, 2.8 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.) ■
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 Hybrid system precautions 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 th e warning labels attached to the vehi-
cle.
System components
A
B
C
D
E
F
G

631-3. Hybrid system
LS500h_OM_OM50F42U_(U) 1
For safety and security WARNING●
If your vehicle needs to be towed, do
so with four 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.422)●
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 lith-
ium-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 your Lexus dealer.
Do not dispose of the battery yourself.
Unless the battery is properly collected,
the following may occur, resulting 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 hi gh 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 your Lexus
dealer or a qualified service shop. If
the hybrid battery is not disposed of
properly, it may cause electric shock
that can result in death or serious
injury.
NOTICE■
Hybrid battery (tra ction battery) air
intake vents
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
your Lexus dealer.

651-3. Hybrid system
LS500h_OM_OM50F42U_(U) 1
For safety and security tact your Lexus dealer.

66 1-4. Theft deterrent system
LS500h_OM_OM50F42U_(U) 1-4.Theft deterrent system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the power switch has been turned to
ACCESSORY or ON mode to indi-
cate that the system has been can-
celed. ■
System maintenance
The vehicle has a maintenance-free type
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 to the security system (key with
a built-in transponder chip) of another
vehicle
■
Certification for the immobilizer system 
For vehicles sold in the U.S.A. , Hawaii, Guam and Puerto RicoImmobilizer system The vehicle’s keys have built-in tran-
sponder chips that prevent the
hybrid system from starting 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
guarantee absolute security
against all vehicle thefts.
Operating the system

671-4. Theft deterrent system
LS500h_OM_OM50F42U_(U) 1
For safety and security 
For vehicles sold in Canada
NOTICE■
To ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.