
4407-2. Steps to take in an emergency
LS500h_OM_(U)_1809
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.443)
There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
There may be a malfunction in the
immobilizer system. ( P.71)
There may be a malfunction in the
shift control system.
* ( P.173, 438)
There may be a malfunction in the
steering lock system.
The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system. ( P.441)
There is a possibility that the tem-
perature of the hybrid battery (trac-
tion battery) is extremely low
(approximately below -22°F
NOTICE
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pr essure warning valve
and transmitter may be damaged if not
handled correctly.
■When driving over bumps
If a vehicle has a flat tire, the vehicle
height will be lower than usual. Ensure
that nothing strikes the bottom of the
vehicle.
■To avoid damage to the tire pressure
warning valves and transmitters
When a tire is repaired with liquid seal-
ants, the tire pressu re warning valve and
transmitter may not operate properly. If a
liquid sealant is used , contact your Lexus
dealer or other qualified service shop as
soon as possible. Make sure to replace
the tire pressure warning valve and trans-
mitter when replacing the tire. ( P.397)
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation. Check the following and per-
form the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
( P.170)

4437-2. Steps to take in an emergency
LS500h_OM_(U)_1809
7
When trouble arises
■When the electronic key does not work
properly
●Make sure that the smart access system
with push-button start has not been dis-
abled at your Lexus dealer. If it has been
disabled, re-enable it.
●Check if battery-saving mode is set. If it is
set, cancel the function. ( P.125)
■Unlocking the door
Use the mechanical key ( P.110) in
order to perform the following opera-
tions: 1
Pull the driver’s door handle and
insert the mechanical key.
2 Unlock the door.
3 Remove the key, return the handle,
and then pull the handle again.
■Locking the door
1 With the door open, push down the
inside lock button.
2 Close the door.
■Trunk
Turn the mechanical key clockwise to
open. ( P.73)
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.125) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors and trunk can be opened and
the hybrid system can be started by
following the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key-related problems
Take your vehicle with all the electronic
keys provided with your vehicle to your
Lexus dealer.
Locking and unlocking the
doors, unlocking the trunk

4457-2. Steps to take in an emergency
LS500h_OM_(U)_1809
7
When trouble arises
If you have a set of jumper (or booster)
cables and a second vehicle with a
12-volt battery, you can jump start your
vehicle by following the steps below.
Method connecting jumper (or
booster) cables to the 12-volt bat-
tery
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( P.74)
2 Open the trunk lid and remove the
luggage mat. ( P.350)
In the event that the trunk opener cannot
be used, use the mechanical key to open
the trunk. (P.443)
3 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Negative (-) battery terminal (your vehicle)
If the 12-volt battery is dis-
charged
The following procedures may be
used to start the hy brid system if the
12-volt battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the hybrid system
A
B
C
D
A
B
C
D

4467-2. Steps to take in an emergency
LS500h_OM_(U)_1809
4Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery of your
vehicle.
5 Open and close any of the doors of
your vehicle with the power switch
off.
6 Maintain the engine speed of the
second vehicle and start the hybrid
system of your vehicle by turning
the power switch to ON mode.
7 Make sure the “READY” indicator
comes on. If the indicator does not
come on, contact your Lexus
dealer.
8 Once the hybrid system has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Method connecting jumper (or
booster) cables to the exclusive
jump starting terminal
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked. (
P.74)
2 Open the hood. Remove the driver
side engine compartment cover
and fuse box cover. ( P.382,
385)
Push the tabs in and lift the lid off.
3 Open the exclusive jump starting
terminal cover.
4 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
A
B

4487-2. Steps to take in an emergency
LS500h_OM_(U)_1809
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■When the 12-volt battery is removed or
discharged
●Information stored in the ECU is cleared.
When the 12-volt battery is depleted,
have the vehicle inspected at your Lexus
dealer.
●Some systems may require initialization.
( P.494)
■When removing the 12-volt battery ter-
minals
When the 12-volt battery terminals are
removed, the information stored in the
ECU is cleared. Before removing the
12-volt battery terminals, contact your
Lexus dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery
will discharge gradually even when the
vehicle is not in use, due to natural dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
■When recharging or replacing the
12-volt battery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
12-volt battery is discharged. Use the
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The hybrid system may not start on the
first attempt after the 12-volt battery has
recharged but will start normally after the
second attempt. This is not a malfunction.
●The power switch mode is memorized by
the vehicle. When the 12-volt battery is
reconnected, the system will return to the
mode it was in before the 12-volt battery
was discharged. Before disconnecting
the 12-volt battery, turn the power switch
off. If you are unsure what mode the power
switch was in before
the 12-volt battery
discharged, be especially careful when
reconnecting the 12-volt battery.
■When replacing the 12-volt battery
●Use a Central Degassing type 12-volt
battery (European Regulations).
●Use a 12-volt battery with the same case
size as the previous 12-volt battery and an
equivalent 20 hour rate capacity (20HR)
or greater.
• If the sizes differ, the 12-volt battery can- not be properly secured.
• If the 20 hour rate capacity is low, even if
the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and the hybrid system
may not be able to start.
●Use a 12-volt battery with a handle. If a
12-volt battery without a handle is used,
removal is more difficult.
●After replacing, firm ly attach the follow-
ing items to the exhaust hole of the
12-volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before replacing
and confirm that it is firmly connected to
the hole section of the vehicle.
• Use the exhaust hole plug included with the 12-volt battery re placed or the one
installed on the 12-volt battery prior to
the replacement. (Depending on the
12-volt battery to be replaced, the
exhaust hole may be plugged.)

4598-1. Specifications
LS500h_OM_(U)_1809
8
Vehicle specifications
This number is also stamped under the
right-hand front seat.
This number is also on the Certification
Label.■Engine number
The engine number is stamped on the
engine block as shown.
Engine
Model3.5 L 6-cylinder (8GR-FXS)
Type6-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70 3.27 in. (94.0 83.0 mm)
Displacement210.9 cu. in. (3456 cm3)
Valve clearanceAutomatic adjustment
Drive belt tensionAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity
(Reference)22.2 gal. (84.0 L, 18.5 Imp. gal.)

4818-2. Customization
LS500h_OM_(U)_1809
8
Vehicle specifications
*1: For details about each function: P.94
*2: The default setting varies according to country.
Units*2miles (MPG)
km (km/L)
OO——km (L/100 km)
miles (MPG
Imperial)
Drive information 1
Current fuel con- sumption
Customizable items: P.92—O——
Average fuel
economy (after reset)
Drive information 2
Distance (driving range)
Average vehicle speed (after reset)
Clock12-hour display24-hour display—O——
Pop-up displayOnOff—O——
Accent colorColor 1Color 2OO——
Tachometer setting
Change accord-ing to driving modeAlways tachome- ter
—O——Always Hybrid
System Indicator
Rev indicator*34000 r/min.
2000 - 6600 r/min.
—O——
Off
Rev peak*3OnOff—O——
EV indicatorOnOff—O——
Suggestion functionOn
On (when the vehicle is stopped)
O——O
Off
Function*1Default settingCustomized set- tingABCD

4828-2. Customization
LS500h_OM_(U)_1809
*3:F SPORT models
■Head-up Display* ( P.96)
*:If equipped
■Door lock ( P.112, 116, 443)
FunctionDefault settingCustomized set-
ting
Gauge informationHybrid System IndicatorTachometer—O——No content
Route guidance to destina-
tion/street name
*OnOff—O——
Driving support system dis-
playOnOff—O——
Compass*OnOff—O——
Audio system operation sta-
tusOnOff—O——
FunctionDefault settingCustomized set- ting
Unlocking using a mechani-
cal key
Driver’s door
unlocked in one step, all doors
unlocked in two step
All doors
unlocked in one step
———O
Automatic door locking func-
tionShift position
linked door lock- ing operationOff
O——OSpeed linked door locking operation
Automatic door unlocking
function
Shift position linked door
unlocking opera- tionOff
O——ODriver’s door linked door
unlocking opera- tion
Locking/unlocking of the
trunk when all doors are
locked/unlocked
OnOff———O
ABCD
ABCD