2018 Lexus IS350 check engine

TABLE OF CONTENTS6
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
6-5. Using the other interior
features
Other interior features .............427 • Sun visors .................................427
• Vanity mirrors ........................427
• Clock .........................................427
• Power outlet .......................... 428
• Armrest.................................... 429
• Rear sunshade ...................... 429
• Assist grips ...............................431
• Coat hooks...............................431
Garage door opener ............... 432
Compass ....................................... 439
LEXUS Enform Safety Connect...................................... 443
LEXUS Enform Remote ......... 448
LEXUS Enform Service Connect...................................... 449
7-1. Maintenance and care Cleaning and protecting the vehicle exterior ................ 452
Cleaning and protecting the vehicle interior.................. 456
7-2. Maintenance Maintenance requirements ............................ 459
General mainte nance.............. 462
Emission inspection and maintenance (I/M)
programs.................................... 465 7-3. Do-it-yourself maintenance
Do-it-yourself service precautions ............................... 466
Hood ............................................... 468
Positioning a floor jack ............ 469
Engine compartment ................. 471
Tires ................................................. 483
Tire inflation pressure .............. 493
Wheels ........................................... 496
Air conditio ning filter ............... 498
Electronic key battery..............500
Checking and replacing fuses.............................................. 502
Light bulbs ....................................505
8-1. Essential information Emergency flashers ....................512
If your vehicle has to be stopped in an emergency .....513
8-2. Steps to take in an emergency
If your vehicle needs to be towed .............................................514
If you think something is wrong........................................... 520
Fuel pump shut off system........521
If a warning light turns on or a warning buzzer
sounds ......................................... 522
If a warning message is displayed .................................... 529
If you have a flat tire .................. 556
If the engine will not start ........ 567
7Maintenance and care
8When trouble arises

8
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Please note that this manual applies to all
models and explains all equipment, including
options. Therefore, you may find some expl anations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual pr oduct improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, th e vehicle 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 vehicles are cur-
rently available in the market. You should kn ow that Toyota does not warrant these prod-
ucts and is not responsible fo r their performance, repair, or replacement, or for any
damage 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 violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
The installation of a mobile two-way radio system in your vehicle could affect electronic
systems such as:
●Multiport fuel injection system/seque ntial multiport fuel injection system
●Lexus Safety System+
●Anti-lock brake system
●Vehicle dynamics integrated management
●SRS airbag system
●Seat belt pretensioner system
Be sure to check with your Lexus dealer for precautionary measures or special instruc-
tions regarding installation of a mobile two-way radio system.
For your information
Main Owner’s Manual
Noise from under vehicle after turning off the engine
Accessories, spare parts and modification of your Lexus
Installation of a mobile two-way radio system

15Pictorial index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 297
To prevent freezing (windshield wiper de-icer)
*. . . . . . . . . . . . . . . . . . . . . . . . P. 412
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 454
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 210
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 210
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 587
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 483
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 593
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 29 7
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . P. 483
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 556
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 468
Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 468
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 588
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 576
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 532
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 190
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Stop lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 164
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 183
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
4
5
6
7
Light bulbs of the ex terior lights for driving(Replacing method: P. 505, Watts: P. 595)
*: If equipped
8
9
10
11
12
13
14

271-1. For safe use
1
For safety and security
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
WARNING
Observe the following precautions.
Failure to do so may cause the driver's floor mat to slip, possibly interfering with the ped-
als while driving. An unexpectedly high spee d may result or it may become difficult to
stop the vehicle. This could lead to an ac cident, 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 Genuine floor mats.
●Only use floor mats designed for the driver’s seat.
●Always install the floor mat securely using the retain ing hooks (clips) provided.
●Do not use two or more floor mats on top of each other.
●Do not place the floor mat bottom-side up or upside-down.
■Before driving
●Check that the floor mat is securely fixed in
the correct place with all the provided retain-
ing hooks (clips). Be especially careful to per-
form this check after cleaning the floor.
●With the engine stopped and the shift lever in
P, fully depress each pedal to the floor to
make sure it does not interfere with the floor
mat.

671-1. For safe use
1
For safety and security
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhaled.
WARNING
Exhaust gases include harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
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 vehicle even when the trunk lid is closed, open the
windows and have the vehicle 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.

782. Instrument cluster
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
*1: These lights turn on when the engine switch is turned to IGNITION ON mode to
indicate that a system check is being performed. They will turn off after the engine is
started, or after a few seconds. There may be a malfunction in a system if a light does
not come on, or turn off. Have the ve hicle inspected by your Lexus dealer.
*2: The light flashes to indicate a malfunction.
*3: This light illuminates on the center panel.
The indicators inform the driver of the op erating state of the vehicle’s various sys-
tems.
*1Tire pressure warning light
( → P. 524)
Indicators
Turn signal indicator
(→ P. 190) LDA (Lane Departure
Alert) indicator (
→P. 232)
(U.S.A.)
Headlight indicator
(→ P. 194) LDA (Lane Departure
Alert) indicator (
→P. 232)
(Canada)
Tail light indicator
(→ P. 194) *2LDA (Lane Departure
Alert) indicator ( →P. 232)
Headlight high beam indi-
cator (→ P. 195)
(if equipped)
Intuitive parkin g assist indi-
cator ( →P. 251)
*1Automatic High Beam indi-
cator (→ P. 198)*1, 2
Slip indicator ( →P. 293)
Cruise control indicator
( → P. 239)
*1VSC OFF indicator
(→ P. 294)
Dynamic radar cruise con-
trol indicator ( →P. 239)
*1, 3PCS warning light
(→ P. 225)
Cruise control “SET” indica-
tor (→ P. 239)
*1
(if equipped)
“AFS OFF” indicator
(→ P. 195)

792. Instrument cluster
2
Instrument cluster
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
*1: These lights turn on when the engine switch is turned to IGNITION ON mode to
indicate that a system check is being performed. They will turn off after the engine is
started, or after a few seconds. There may be a malfunction in a system if a light does
not come on, or turn off. Have the ve hicle inspected by your Lexus dealer.
*2: The light flashes to indicate that the system is operating.
*3: The light comes on when the system is turned off.
*4, 5
(if equipped)
BSM (Blind Spot Monitor)
outside rear view mirror
indicators (→P. 276)*9
(if equipped)
“SPORT” indicator
(→ P. 288)
*6Security indicator
(→ P. 68, 71)*9
(if equipped)
“SPORT S” indicator
(→ P. 288)
*7Low outside temperature
indicator ( →P. 81)*9
(if equipped)
“SPORT S+” indicator
(→ P. 288)
*1Eco Driving Indicator Light
(→ P. 101)*9
(if equipped)
“CUSTOMIZE” indicator
(→ P. 288)
*8Eco drive mode indicator
(→ P. 288) Snow mode indicator
(
→ P. 184)
*9Eco drive mode indicator
(→ P. 288)*1, 6
(U.S.A.)
“AIR BAG ON/OFF”
indicator ( →P. 46)
*8“SPORT” indicator
(→ P. 288)*1, 6
(Canada)
“AIR BAG ON/OFF”
indicator ( →P. 46)

852. Instrument cluster
2
Instrument cluster
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be adjusted
individually. However, when the surroundings are bright (daytime, etc.), turning on the tail
lights will not change the inst rument panel brightness. At th is time, any adjustments made
to the instrument panel brightness levels will be applied to both settings at once.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a garage, tunnel, etc.)
●When “ − −” or “E” is displayed, the sy stem may be malfunctioning.
Take your vehicle to your Lexus dealer.
■Pop-up display
●In some situations, such as when a switch operation is performed, a pop-up display will
be temporarily displayed on the multi-information display or the odometer/trip meter
screen (F SPORT models).
●Some pop-up displays can be set on/off. ( →P. 95)
■Customization
The meter display can be customized on the multi-information display. (→P. 95)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( →P. 576)