power steering LEXUS LS500H 2018 Owner's Guide

4357-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises If it is, tighten it securely.
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer as soon as
possible. ■
Electric power steering system warning
light (warning buzzer)
When the 12-volt battery charge becomes
insufficient or the voltage temporarily
drops, the electric po wer steering system
warning light may come on and the warning
buzzer may sound. ■
When the tire pressure warning light
comes on
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: → P.442
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the ti re pressure warning
light comes on or blinks. 
If the tire pressure wa rning light blinks for
approximately 1 minute then stays on
There may be a malfunction in the tire
pressure warning syst em. Have the vehicle
inspected by your Lexus dealer immedi-
ately. 
If the tire pressure warning light comes
on
1 After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
2 If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. ( → P.401)
■
The tire pressure warning light may
come on due to natural causes
The tire pressure wa rning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the
warning light (after a few minutes). ■
Conditions that the tire pressure warn-
ing system may not function properly
→ P.398
WARNING■
If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer.
The vehicle will become extremely
unstable during br aking, and the ABS
system may fail, which could cause an
accident resulting in death or serious
injury. ■
When the electric power steering
system warning light comes on
When the light comes on yellow, the
assist to the power st eering is restricted.
When the light comes on red, the assist
to the power steering is lost and handling
operations of the steering wheel become
extremely heavy.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using more
force than usual. ■
If the tire pressure warning light
comes on
Be sure to observe the following precau-
tions.
Failure to do so could cause a loss of
vehicle control and result in death or
serious injury.
●
Decelerate to the lowest appropriate
speed as soon as possible. Do not
drive over 50 mph (80 km/h).
●
Check and adjust the tire inflation
pressure immediately.
●
If the tire pressure warning light comes
on even after tire inflation pressure
adjustment, it is prob able that you have
a flat tire. Have the flat tire replaced by
the nearest Lexus dealer.

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

4437-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises
One of the following may be the cause
of the problem:
 The electronic key may not be func-
tioning properly. ( → P.445)
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
 There may be a malfunction in the
immobilizer system. ( → P.66)
 There may be a malfunction in the
shift control system. *
( → P.171, 441)
 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.443)
 There is a possibility that the tem-
perature of the hybrid battery (trac-
tion battery) is extremely low
(approximately below -22°F [-30°C]). ( → P.168) *
: It may not be possible to shift the shift
position from P.
One of the following may be the cause
of the problem:
 The 12-volt battery may be dis-
charged. ( → P.447)
 The 12-volt battery terminal con-
nections may be lo ose or corroded.
( → P.393)
One of the following may be the cause
of the problem:
 One or both of the 12-volt battery
terminals may be disconnected.
( → P.393)
 The 12-volt battery may be dis-
charged. ( → P.447)Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the hybrid syst em does not start,
the following steps can be used as an
interim measure to start the hybrid sys-
tem if the power switch is functioning 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.168) The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.
The interior lights and head-
lights do not turn on, or the horn
does not sound.
Starting the hybrid system in an
emergency

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

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

5091-1. What to do if... (Troubleshooting)
LS500h_OM_OM50F42U_(U) 509What to do if... (Troubleshooting)
( → P.447)
 It is locked automatically to prevent
theft of the vehicle. ( → P.169)
 Is the window lock switch pressed? The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( →
P.153 )
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY mode for a period of
time. ( → P.171)
 The seat belt reminder light is flash-
ing Are the driver and the front passenger
wearing the seat belts? ( →
P.430 )
 The parking brake indicator is on Is the parking brake released? ( →
P.181 )
Depending on the situation, other
types of warning buzzer may also
sound. ( → P.427, 437)  Did anyone inside the vehicle open
a door during setting the alarm? The sensor detects it and the alarm sounds.
( →
P.68 )
Do one of the following to deactivate
or stop the alarms:
 Unlock the doors.
 Turn the power switch to ACCES-
SORY or ON mode, or start the
hybrid system. (The alarm will be
deactivated or stopped after a few
seconds.)
 Is the message displayed on the
multi-information display? Check the message on the multi-informa-
tion display. ( →
P.437 )
 When a warning light turns on or a
warning message is displayed, refer
to P.427, 437.
 Slow down the vehicle, drive with The steering wheel cannot be
turned after the hybrid system is
stopped
The windows do not open or
close by operating the power
window switches
The power switch is turned off
automatically
A warning buzzer sounds during
driving An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred If you have a flat tire

512 Alphabetical Index
LS500h_OM_OM50F42U_(U) C
Card key .......................................................... 104
Care
Aluminum wheels ...................................... 370
Exterior ........................................................... 370
Interior ............................................................. 373
Seat belts........................................................ 373
Cargo capacity...............................................166
Cargo net ....................................................... 348
Center Display ...............................................316
Chains ............................................................... 310
Child restraint system
Fixed with a LATCH system .................. 53
Fixed with a seat belt................................... 49
Front passenger occupa nt classification
system ............................................................. 40
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation
method ........................................................... 46
Using an anchor bracket .......................... 55
Child safety
12-volt battery precautions ........ 394, 451
Airbag precautions...................................... 34
Child restraint system................................. 46
Heated steering wheel and seat heater
precautions................................................ 337
How your child should wear the seat belt
............................................................................ 25
Moon roof precautions ............................154
Power window lock switch.....................153
Power window precautions ...................152
Rear door child-protectors ....................... 111
Removed electronic key battery precau-
tions ................................................................. 414
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 45
Trunk precautions .........................................112
Child-protectors...............................................111
Cleaning
Aluminum wheels ...................................... 370 Exterior............................................................370
Interior ............................................................. 373
Radar sensor ........................ 199, 200, 206
Seat belts ........................................................ 373
Clock ................................................. 77, 81, 353
Clock light ...................................................... 340
Coat hooks..................................................... 352
Coin holder .................................................... 345
Condenser .......................................................391
Console box .................................................. 346
Cooling system............................................. 390
Engine overheating...................................453
Hybrid system overheating ..................454
Cornering lights .............................................187
Cruise control
Dynamic radar cruise control with
full-speed range ..........................247, 250
Cup holders ................................................... 345
Current fuel consumption .......................... 88
Curtain shield airbags .................................. 29
Customizable features ............................... 481
D
Daytime running light system .................. 185
Defogger
Outside rear view mirrors..................... 324
Rear window ................................................ 324
Windshield .................................................... 324
Differential
Front differential oi l............. ...................... 465
Rear differential oil......... .......... ........... ...... 465
Dimension ...................................................... 460
Dinghy towing................................................. 167
Display
Center Display ............................................. 316
Dynamic radar cruise control with
full-speed range ..................................... 250
Energy monitor .............................................. 96
Head-up display............................................ 92
Intuitive parking assist ..............................266
LKA (Lane-Keeping Assist) ................. 243
LTA (Lane-Tracing Assist) ................... 234