2018 LEXUS LS500 check engine

4 TABLE OF CONTENTS
LS500_OM_OM50F54U_(U) 5-6. Using the other interior features
Other interior features .............. 342
Garage door opener.................. 349
Lexus Enform Safety Connect
........................................................... 355
6-1. Maintenance and care
Cleaning and protecting the vehi-
cle exterior ................................... 362
Cleaning and protecting the vehi-
cle interior .................................... 365
6-2. Maintenance
Maintenance requirements ..... 368
General maintenance ................ 369
Emission inspection and mainte-
nance (I/M) programs ............ 372
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions
........................................................... 373
Hood.................................................. 375
Positioning a floor jack............... 375
Engine compartment.................. 377
Battery .............................................. 384
Tires ................................................... 386
Replacing the tire ......................... 396
Tire inflation pressure ................. 399
Wheels............................................... 401
Air conditioning filter.................. 402
Electronic key battery ................ 403
Checking and replacing fuses
........................................................... 405
Light bulbs ....................................... 408 7-1. Essential information
Emergency flashers ..................... 410
If your vehicle has to be stopped in
an emergency ............................. 410
7-2. Steps to take in an emergency
If your vehicle needs to be towed
............................................................ 412
If you think something is wrong
........................................................... 416
Fuel pump shut off system .......... 417
If a warning light turns on or a warn-
ing buzzer sounds...................... 418
If a warning messa ge is displayed
.......................................................... 428
If you have a flat tire .................... 432
If the engine will not start .......... 433
If you lose your keys.................... 435
If the fuel filler door cannot be
opened .......................................... 435
If the electronic key does not oper-
ate properly ................................. 436
If the vehicle battery is discharged
.......................................................... 438
If your vehicle overheats ........... 443
If the vehicle becomes stuck ... 446
8-1. Specifications
Maintenance data (fuel, oil level,
etc.) ................................................. 448
Fuel information............................ 457
Tire information ............................ 4596
Maintenance and care 7
When trouble arises
8
Vehicle specifications

6
LS500_OM_OM50F54U_(U) Please note that this manual applies to
all models and explains all equipment,
including options. Therefore, you may
find some explanat ions for equipment
not installed on your vehicle.
All specifications provided in this man-
ual are current at the time of printing.
However, because of the Lexus policy
of continual product improvement, we
reserve the right to make changes at
any time without notice.
Depending on specifications, the vehi-
cle shown in the illustrations may differ
from your vehicle in terms of color and
equipment.
Approximately five hours after the
engine is turned off, you may hear
sound coming from under the vehicle
for several minutes. This is the sound of
a fuel evaporation leakage check and,
it does not indicate a malfunction.
A wide variety of non-genuine spare
parts and accessories for Lexus vehi-
cles are currently available in the mar-
ket. You should know that Toyota does
not warrant these products and is not
responsible for their performance,
repair, or replacement, or for any dam- age they may cause to, or adverse
effect they may have on, your Lexus
vehicle.
This vehicle should not be modified
with non-genuine Lexus products.
Modification with non-genuine Lexus
products could affect its performance,
safety or durability, and may even vio-
late governmental regulations. In addi-
tion, damage or performance
problems resulting from the modifica-
tion may not be covered under war-
ranty.
The installation of a mobile two-way
radio system in your vehicle could
affect electronic systems such as:
 Multiport fuel injection sys-
tem/sequential multiport fuel injec-
tion system
 Lexus Safety System+A
 Lexus Safety System+
 Anti-lock brake system
 Vehicle dynamics integrated man-
agement
 SRS airbag system
 Seat belt pretensioner system
Be sure to check with your Lexus
dealer for precautionary measures or
special instructions regarding installa-
tion of a mobile two-way radio system.
Your Lexus is equipped with several For your information Main Owner’s Manual
Noise from under vehicle after turn-
ing off the engine
Accessories, spare parts and modifi-
cation of your Lexus Installation of a mobile two-way radio
system
Vehicle data recordings

13Pictorial index
LS500_OM_OM50F54U_(U) Precautions for winter season .. ................................................................................... P.299
To prevent freezing (windshield wiper de-icer) *
...................................................P.317
Precautions for car wash ............................................................................................... P.363
Fuel filler door ..........................................................................................................P.185
Refueling method .............................................................................................................. P .185
Fuel type/fuel tank capacity ...... ................................................................................... P.449
Tires.......................................................................................................................... .P.386
Tire size/inflation pressure ............................ ................................................... P.386, 454
Winter tires/tire chains .................................................................................................. P.299
Checking/rotation/tire pressu re warning system..............................................P.386
Coping with flat tires........................................................................................................ P .432
Hood .......................................................................................................................... P .375
Opening ........................................................................................................................ ....... P.375
Engine compartment cover ......................................................................................... P.378
Engine oil ..................................................................................................................... .........P.450
Coping with overheating ............................................................................................... P.443
Warning messages .......................................................................................................... P.428
Headlights/cornering lights ................................................................................ P.175
Parking lights/daytime running lights............................................................... P.175
Turn signal lights ...................................................................................................... P.169
Tail lights .................................................................................................................... P.175
Stop lights
Hill-start assist control .................................................................................................... P. 294
License plate lights ................................................................................................. P.175
Back-up lights
Changing the shift position to R................................................................................... P.163
Side marker lights ................................................................................................... P.175 *
:If equipped Light bulbs of the exterior lights for driving
(Replacing method: P.408) E
F
G
H
I
J
K
L
M
N

22 1-1. For safe use
LS500_OM_OM50F54U_(U) 1-1.For safe use
Use only floor mats designed specifi-
cally for vehicles of the same model
and model year as your vehicle. Fix
them securely in place onto the carpet.
1 Insert the retaining hooks (clips)
into the floor mat eyelets.
2 Turn the upper knob of each retain-
ing hook (clip) to secure the floor
mats in place.
Always align the marks .
The shape of the reta ining hooks (clips)
may differ from that shown in the illustra-
tion.Before driving Observe the following before start-
ing off in the vehicle to ensure
safety of driving.
Installing floor mats
A WARNING
Observe the following precautions.
Failure to do so may cause the driver’s
floor mat to slip, poss ibly interfering with
the pedals while driv ing. An unexpect-
edly high speed may result or it may
become difficult to stop the vehicle. This
could lead to an accident, resulting in
death or serious injury. ■
When installing the driver’s floor mat ●
Do not use floor mats designed for
other models or different model year
vehicles, even if they are Lexus Genu-
ine floor mats. ●
Only use floor mats designed for the
driver’s seat. ●
Always install the floor mat securely
using the retaining hooks (clips) pro-
vided. ●
Do not use two or more floor mats on
top of each other. ●
Do not place the floor mat bot-
tom-side up or upside-down. ■
Before driving ●
Check that the floor mat is securely
fixed in the correct place with all the
provided retaining hooks (clips). Be
especially careful to perform this
check after cleaning the floor.
●
With the engine stopped and the shift
position in P, fully depress each pedal
to the floor to make sure it does not
interfere with the floor mat.

44 1-1. For safe use
LS500_OM_OM50F54U_(U) Exhaust gas precautions Harmful substance to the human
body is included in exhaust gases if
inhaled. WARNING
Exhaust gases include harmful carbon
monoxide (CO), which is colorless and
odorless. Observe the following precau-
tions.
Failure to do so may cause exhaust gases
enter the vehicle and may lead to an
accident caused by light-headedness, or
may lead to death or a serious health
hazard. ■
Important points while driving●
Keep the trunk lid closed.●
If you smell exhaust gases in the vehi-
cle even when the trunk lid is closed,
open the windows and have the vehi-
cle inspected at your Lexus dealer as
soon as possible.■
When parking●
If the vehicle is in a poorly ventilated
area or a closed area, such as a
garage, stop the engine.
●
Do not leave the vehicle with the
engine on for a long time.
If such a situation cannot be avoided,
park the vehicle in an open space and
ensure that exhaust fumes do not enter
the vehicle interior.
●
Do not leave the engine running in an
area with snow build-up, or where it is
snowing. If snowbanks build up around
the vehicle while the engine is running,
exhaust gases may collect and enter
the vehicle. ■
Exhaust pipe
The exhaust system needs to be checked
periodically. If there is a hole or crack
caused by corrosion, damage to a joint
or abnormal exhaust noise, be sure to
have the vehicle inspected and repaired
by your Lexus dealer.

60 1-3. Theft deterrent system
LS500_OM_OM50F54U_(U) ■
Items to check before locking the
vehicle
To prevent unexpected triggering of
the alarm and vehicle theft, make sure
of the following:
 Nobody is in the vehicle.
 The windows, moon roof (if
equipped) and panoramic moon
roof (if equipped) are closed before
the alarm is set.
 No valuables or other personal
items are left in the vehicle. ■
Setting
Close the doors, trunk and hood, and
lock all the doors. The system will be
set automatically after 30 seconds. The indicator light changes from being on
to flashing when the system is set. ■
Canceling or stopping
Do one of the following to deactivate
or stop the alarms:
 Unlock the doors.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine. (The alarm will be
deactivated or stopped after a few
seconds.) ■
System maintenance
The vehicle has a maintenance-free type
alarm system. ■
Triggering of the alarm
The alarm may be triggered in the following
situations:
(Stopping the alarm deactivates the alarm
system.) ●
The trunk is opened using the mechanical
key.
●
A person inside the vehicle opens a door,
the trunk or hood, or unlocks the vehicle.Alarm The alarm uses light and sound to
give an alert when an intrusion is
detected.
The alarm is triggered in the follow-
ing situations when the alarm is set:
 A locked door or trunk is
unlocked or opened in any way
other than using the entry func-
tion, wireless remote control or
mechanical key. (The doors will
lock again automatically.)
 The hood is opened.
Setting/canceling/stopping the
alarm system

66 2-1. Instrument cluster
LS500_OM_OM50F54U_(U) *1
: These lights come on when the engine
switch is turned to IGNITION ON
mode to indicate that a system check is
being performed. They will go off after
the engine is on, or after a few seconds.
There may be a malfunction in a system
if the lights do not come on, or go off.
Have the vehicle inspected by your
Lexus dealer. *2
: This light illuminates on the multi-infor-
mation display. *3
: This light illuminates on the center
panel. *4
: F SPORT models: This light comes on
when the engine switch is turned to
IGNITION ON mode to indicate that a
system check is being performed. They
will go off after the en gine is on, or after
a few seconds. There may be a malfunc-
tion in a system if the lights do not come
on, or go off. Have the vehicle inspected
by your Lexus dealer. The indicators inform the driver of the
operating state of the vehicle’s various
systems.(flashes)
(Canada)
Parking brake indicator
( → P.425)(flashes)
Brake hold operated indicator *1

( → P.425)
Master warning light *4

( → P.425)
WARNING
■
If a safety system warning light does
not come on
Should a safety system light such as the
ABS and SRS warning light not come on
when you start the engine, this could
mean that these systems are not available
to help protect you in an accident, which
could result in death or serious injury.
Have the vehicle inspected by your
Lexus dealer immediately if this occurs. Indicators Turn signal indicator ( → P.169)
(U.S.A.) Headlight indicator ( → P.175)
(Canada) Tail light indicator ( → P.175)
Headlight high beam indicator
( → P.176)
AHB indicator ( → P.178)
PCS warning light *1, 2

( → P.203, 213)
Cruise control indicator
( → P.248)
Dynamic radar cruise control
indicator ( → P.241)
Cruise control “SET” indicator
( → P.241)
(white)LTA indicator (if equipped)
( → P.225)
LKA indicator (if equipped)
( → P.233)
(green) LTA indicator (if equipped)
( → P.225)
LKA indicator (if equipped)
( → P.234)
(orange)
(flashes) LTA indicator (if equipped)
( → P.225)
LKA indicator (if equipped)
( → P.234)
BSM outside rear view mirror
indicators *1, 3
(if equipped)
( → P.251, 264)

68 2-1. Instrument cluster
LS500_OM_OM50F54U_(U) *1
: These lights come on when the engine
switch is turned to IGNITION ON
mode to indicate that a system check is
being performed. They will go off after
the engine is on, or after a few seconds.
There may be a malfunction in a system
if the lights do not come on, or go off.
Have the vehicle inspected by your
Lexus dealer. *2
: This light comes on when the system is
turned off. *3
: This light illuminates on the outside rear
view mirrors. *4
: This light illuminates on the multi-infor-
mation display. *5
: When the outside temperature is
approximately 37°F (3°C) or lower, this
indicator will flash for approximately 10
seconds, then stay on. *6
: This light illuminates on the center
panel. Comfort mode indicator
( → P.289)
Eco drive mode indicator
( → P.289)
Sport S mode indicator
( → P.289)
Sport S+ mode indicator
( → P.289)