
4397-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises In some situations, the master warning light and warning buzzer may not oper-
ate as specified. In this case, follow the instructions displayed in the warning
message.
If a warning light comes on or flashes at the same time that a warning message is
displayed, take corrective actio n according to the warning light. ( → P.427)*
: A buzzer sounds the first time a message is shown on the multi-information display.
■
Warning messages
The warning messages explained below
may differ from the actual messages
according to operation conditions and vehi-
cle specifications. ■
Warning buzzer
In some cases, the bu zzer may not be heard
due to being in a noisy location or audio
sound. ■
If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil level is low. Check the level
of the engine oil, and add if necessary.
This message may appear if the vehicle is
stopped on a slope. Move the vehicle to a
level surface and check to see if the mes-
sage disappears.
■
If “Hybrid System Stopped Steering
Power Low” is displayed
This message is displa yed if the hybrid sys-
tem is stopped while driving.
When steering wheel operations are
heavier than usual, grip the steering wheel
firmly and operate it using more force than
usual. ■
If “Hybrid System Overheated Reduced
Output Power” is displayed
This message may be displayed when driv-
ing under severe operat ing conditions. (For
example, when driving up a long steep hill.)
Handling method: → P.453■
If “Warming Up Maximum Vehicle
Speed: 65 MPH” is displayed
The transmission is being warmed up and
the vehicle is unable to be driven over 65
mph (110 km/h). Wait until the transmission
warms up. ■
If “Stop the Vehicle in a Safe Place Shift
to P position” is displayed
There may be a malfunction in the hybrid
system or the shift position may be shifted to
N for a long time. I mmediately stop the
vehicle and contact your Lexus dealer.
■
If “Traction Battery Needs to be Pro-
tected Refrain From the Use of N Posi-
tion” is displayed
The remaining charge for the hybrid battery
(traction battery) is low.
As the hybrid battery (traction battery) can-
not be charged when the shift position is in
N, when stopping the vehicle for a long
period of time, shift the shift position to P.Comes on Does not sound Indicates a condition, such as malfunction of electri-
cal components, their cond ition, or indicates the
need for maintenance
Flashes Does not sound Indicates a situation, such as when an operation has
been performed incorrectly, or indicates how to
perform an operation correctlyWarning buzzer *
Warning

466 8-1. Specifications
LS500h_OM_OM50F42U_(U) *1
: Minimum pedal clearance when depressed with a force of 11 2 lbf (500 N, 51 kgf) while
the hybrid system is operating.
When performing the brake pedal inspection, also be sure to check that the brake sys-
tem warning light is not illuminated when the hybrid system is operating. (If the brake
system warning light is illuminated, refer to P.427.) *2
: Make sure to confirm that the brake warning light (yellow) does not illuminate. (If the
brake warning light illuminates, refer to P.427.)
19-inch tires (type A) Parking brake indicator *2
When pushing the parking brake switch for 1 to 2
seconds: comes on
When pulling the parking brake switch for 1 to 2
seconds: turns off
Fluid type FMVSS No.116 DOT 3 or SAE J1703
FMVSS No.116 DOT 4 or SAE J1704
Steering Free play Less than 1.2 in. (30 mm)
Tires and wheels Tire size 245/50RF19 101W
Tire inflation pressure
(Recommended cold tire
inflation pressure) Driving under normal conditions
Front: 36 psi (250 kPa, 2.5 kgf/cm 2
or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm 2
or bar)
Driving at high speeds above 118 mph (190 km/h) (in coun-
tries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm 2
or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel size 19 × 8J
Wheel nut torque 103 ft•lbf (140 N•m, 14.3 kgf•m)

4758-1. Specifications
LS500h_OM_OM50F42U_(U) 8
Vehicle specifications ■
Traction AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete. A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
cornering (turning) traction. ■
Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat when tested under controlled condi-
tions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudd en tire failure.
Grade C corresponds to a level of perfor-
mance which all passenger car tires must
meet under the Fede ral Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is prop erly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology Tire related term Meaning
Cold tire inflation pressure Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressure The maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressure Cold tire inflation pressure recommended by a
manufacturer
Accessory weight The combined weight (in excess of those standard
items which may be replaced) of hybrid transmis-
sion, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)

4878-2. Customization
LS500h_OM_OM50F42U_(U) 8
Vehicle specifications *
:If equipped ■
Driving position memory ( → P.139)
■
Outside rear view mirrors ( → P.149)Door linked rear seat with
ottoman seatback position for
exiting *
More upright
than upright posi-
tion Upright position — — O —
Shift-linked rear seat reclining
function On Off — — — O
Function Default setting Customized set-
ting
Selecting doors linked to the
memory recall function Driver’s door All doors — — — O
Driver’s seat slide movement
when exiting the vehicle Full Off
O — — O
Partial
Driver’s seat height move-
ment when exiting the vehicle Off Full
O — — O
Partial
Front passenger’s seat move-
ment when exiting the vehicle On Off — — — O
Steering wheel movement Tilt only Off
O — — OTelescopic only
Tilt and telescopic
Function Default setting Customized set-
ting
Automatic mirror folding and
extending operation Linked to the
locking/ unlock-
ing of the doors Off
— — — OLinked to opera-
tion of the power
switchFunction Default setting Customized set-
ting A B C D
A B C D
A B C D

4898-2. Customization
LS500h_OM_OM50F42U_(U) 8
Vehicle specifications ■
PCS (Pre-Collision System) and FC TA (Front Cross Traffic Alert) *
( → P.209,
220, 227) *
:If equipped ■
LTA (Lane Tracing Assist) *
( → P.230)
*
:If equipped
■
LKA (Lane-Keeping Assist) *
( → P.240)Function Default setting Customized set-
ting
PCS (Pre-Collision System)
and FCTA function On Off — O — —
Adjust alert timing Middle Far
— O — —
Near
Pedestrian alert *
and FCTA
function On Off — O — —
Function Default setting Customized set-
ting
Lane centering function On Off — O — —
Steering assist function On Off — O — —
Alert type Steering wheel
vibration Buzzer — O — —
Alert sensitivity High Standard — O — —
Vehicle sway warning func-
tion On Off — O — —
Vehicle sway warning sensi-
tivity Standard High
— O — —
Low
Function Default setting Customized set-
ting
Lane centering function Off On — O — —
Steering assist function On Off — O — —
Alert type Steering wheel
vibration Buzzer — O — —
Alert sensitivity Standard High — O — — A B C D
A B C D
A B C D

4938-2. Customization
LS500h_OM_OM50F42U_(U) 8
Vehicle specifications *
:If equipped ■
Heated steering wheel *
( → P.336)*
:If equipped ■
Illumination ( → P.340)Right-hand rear seat tem-
perature preference in auto-
matic mode *
Standard -2 (cooler) to 2
(warmer) O — — O
Power switch linked auto-
matic activation of the
left-hand rear seat
heater/ventilator *
Off On O — — O
Power switch linked auto-
matic activation of the
right-hand rear seat
heater/ventilator *
Off On O — — O
Function Default setting Customized set-
ting
Steering wheel heating pref-
erence in automatic mode Standard -2 (low) to 2
(high) O — — O
Function Default setting Customized set-
ting
Time elapsed before the inte-
rior lights turn off 15 seconds Off
O — — O7.5 seconds
30 seconds
Operation after the power
switch is turned off On Off — — — O
Operation when the doors
are unlocked On Off — — — O
Operation when you
approach the vehicle with the
electronic key on your person On Off — — — O
Footwell lights On Off — — — OFunction Default setting Customized set-
ting A B C D
A B C D
A B C D

4958-3. Initialization
LS500h_OM_OM50F42U_(U) 8
Vehicle specifications 8-3.Initialization
*
:If equippedItems to initialize The following items must be initialized for normal system operation after such
cases as the 12-volt battery being re connected, or maintenance being per-
formed on the vehicle:
List of items to initialize Item When to initialize Reference
PKSB (Parking Support
Brake) • After reconnecting or changing the
12-volt battery P.284
Message indicating
maintenance is
required • After maintenance is performed P.378
Oil maintenance • After maintenance is performed P.390
Tire pressure warning
system • When the tire inflation pressure is
changed, such as when changing trav-
eling speed or load weight.
• When the tire inflation pressure is
changed, such as when the tire size is
changed.
• When rotating the tires.
• After performing the transmitter ID
code registration procedure. P.401
Lexus parking assist
monitor *
• 12-volt battery ha s been reinstalled.
• The steering wheel has been moved
while the 12-volt battery was being
reinstalled.
• 12-volt battery power is low. Refer to the “NAVI-
GATION AND MUL-
TIMEDIA SYSTEM
OWNER’S MAN-
UAL”.
Panoramic view moni-
tor *
• 12-volt battery ha s been reinstalled.
• The steering wheel has been moved
while the 12-volt battery was being
reinstalled.
• 12-volt battery power is low. Refer to the “NAVI-
GATION AND MUL-
TIMEDIA SYSTEM
OWNER’S MAN-
UAL”.

508 What to do if... (Troubleshooting)
LS500h_OM_OM50F42U_(U) 1-1.What to do if... (Troubleshooting)
What to do if... (Troubleshooting) If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( → P.444)
If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( → P.444)
Is the electronic key battery weak or
depleted? ( → P.413)
Is the power switch in ON mode? When locking the doors, turn the power
switch off. ( →
P.170 )
Is the electronic key left inside the
vehicle? When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop-
erly due to the condition of the radio
wave. ( → P.120) Is the child-protector lock set? The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( →
P.111 )
The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. ( → P.116)
Did you press the power switch
while firmly depressing the brake
pedal? ( → P.168)
Is the electronic key anywhere
detectable inside the vehicle?
( → P.119)
Is the steering wheel unlocked?
( → P.169)
Is the electronic key battery weak or
depleted? In this case, the hy brid system can be
started in a temporary way. ( →
P.446 )
Is the 12-volt battery discharged? If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed You lose your keys
The doors cannot be locked or
unlocked The rear door cannot be opened
The trunk lid is closed with the
electronic key left inside
If you think something is wrong The hybrid system does not start