2018 Lexus IS300 warning lights

5268-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficien t or the voltage temporarily drops, the
electric power steering system warning li ght may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on
Check the tire inflation pressu re and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not tu rn off the tire pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caus ed by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with the spare tire
The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure wa rning system may not function properly
→ P. 488
■If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
WARNING
■If both the ABS and the brake sy stem warning lights remain on
Stop your vehicle in a safe place immediat ely and contact your Lexus dealer. The vehi-
cle will become extremely unstable during br aking, and the ABS system may fail, which
could cause an accident resultin g in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may 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 precaution s. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire . Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

5298-2. Steps to take in an emergency
8
When trouble arises
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Master warning light
The master warning light also comes on or flashes in order to indicate that a
message is currently being displaye d on the multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions have been
performed, contact your Lexus dealer.
If a warning message is displayed
If a warning is shown on the multi-info rmation display, stay calm and perform
the following actions:
Except F SPORT modelsF SPORT models (when the main
meter is in the center position)
F SPORT models (when the main
meter is in the right-side position)
1
2

5428-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
→ Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
→ Close the moon roof.
Indicates that the windows are not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
→ Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the engine switch off, and the driver’s
door open)
A buzzer also sounds.
→ Close all the windows and the moon roof.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)

5478-2. Steps to take in an emergency
8
When trouble arises
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Indicates that all maintenance is required to correspond
to the driven distance on the maintenance schedule*.
→ Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The indicator will
not work properly unless the message has been
reset.)
Perform the necessary maintenance. Please reset
the message after the maintenance is performed.
(→ P. 460)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→ Turn the high beam on and press the Automatic
High Beam switch again.
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-collision braking and pre-
collision brake assist are stopped (The pre-collision
warning function will be operational)
→ Turn the VSC on. ( →P. 294)
Indicates that the PCS (Pre -Collision System) is tempo-
rarily unavailable
→ When conditions improve, the system resumes
operation. If this message is displayed continuously,
have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions

640Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Back-up lights
Replacing light bulbs ....................... 509
Battery.......................................................480 Battery checking ............................... 480
If the vehicle battery is discharged..................................... 572
Preparing and checking before winter .................................................... 297
Warning light ....................................... 522
Bluetooth
®
Audio system .......................................362
Hands-free system (for cellular phone) ........................363
Bottle holders ......................................... 423
Brake Fluid........................................................... 479
Parking brake........................................ 192
Warning light ....................................... 522
Brake assist ............................................. 292
Break-in tips..............................................166
Brightness control Instrument panel light control .........84
BSM (Blind Spot Monitor)................ 276 BSM function ...................................... 280
RCTA function ................................... 283 Care................................................ 452, 456
Aluminum wheels .............................. 453
Exterior ................................................... 452
Interior ..................................................... 456
Seat belts................................................ 457
Cargo capacity ....................................... 175
Cargo hooks ...........................................425
CD player................................................ 336
Chains ....................................................... 298
Child restraint system ........................... 53 Booster seats, definition .................... 54
Booster seats, installation ................. 63
Convertible seats, definition ........... 54
Convertible seats, installation......... 60
Front passenger occupant classification system......................... 46
Infant seats, definition.......................... 54
Infant seats, installation....................... 60
Installing CRS with LATCH anchors ..................... 58
Installing CRS with seat belts ......... 60
Installing CRS with top tether strap......................... 64
BC

642Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Daytime running light system ............196
Defogger
Outside rear view mirrors ...............412
Rear window ..........................................412
Windshield ..............................................412
Differential Front differential ................................... 591
Rear differential ...................................592
Dimension ............................................... 584
Dinghy towing.......................................... 177
Display Drive information .................................. 92
Dynamic radar cruise control......239
LDA (Lane Departure Alert with steering control) .......236
Multi-information display ..................86
Warning message .............................529
Do-it-yourself maintenance ............. 466
Door courtesy lights Location ................................................... 418
Wattage ................................................. 595 Doors ........................................................... 116
Automatic door locking and unlocking system ..................... 119
Door lock.................................................. 118
Open door warning buzzer ............ 117
Open door warning light .............. 524
Outside rear view mirrors ............... 151
Rear door child-protector ............... 119
Side windows ........................................154
Drive information .....................................92
Drive-Start Control..................... 165, 187
Driver’s and front passenger’s seat belt reminder light....................524
Driver’s seat position memory.......... 139
Driving ........................................................ 164 Break-in tips ...........................................166
Correct driving posture .................... 28
Driving mode select switch ..........288
Procedures .............................................164
Winter drive tips ................................ 297
Dynamic radar cruise control ......... 239
D

644Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
First-aid kit storage belt ..................... 425
Flat tire ...................................................... 556
Floor mats ................................................... 26
Fluid
Automatic transmission ................... 591
Brake ........................................................592
Washer ...................................................482
Footwell light ........................................... 418 Wattage ................................................. 595
Front passenger occupant classification system ............................ 46
Front personal lights..............................419 Wattage ................................................. 595
Front seats ................................................ 135 Adjustment ............................................. 135
Cleaning ................................................ 456
Correct driving posture .................... 28
Driving position memory ................ 139
Head restraints ..................................... 144
Power easy access system ............ 139
Seat heaters ............................................417
Seat position memory....................... 139
Seat ventilators ......................................417
Front turn signal lights ......................... 190 Replacing light bulbs ....................... 506
Turn signal lever .................................. 190
Wattage ................................................. 595 Fuel............................................................... 210
Capacity................................................. 587
Fuel gauge .................................................81
Fuel pump shut off system .............. 521
Information............................................596
Refueling ..................................................210
Type.......................................................... 587
Warning light ....................................... 524
Fuel consumption Average fuel economy ........................ 104, 105, 107
Current fuel consumption................. 104, 105, 107
Fuel filler door.......................................... 210 If the fuel filler door cannot be opened ........................... 212
Refueling ..................................................210
Fuel gauge ................................................... 81
Fuel pump shut off system .................. 521
Fuses.......................................................... 502
Garage door opener...........................432
Gauges.......................................................... 81
Gear positions......................................... 187
Glove box ................................................422
Glove box light.......................................422
F
G

645Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Hands-free system
(for cellular phone) ........................... 363
HD Radio
® system .............................. 330
Head restraints ........................................144
Headlights .................................................194 AFS (Adaptive Front-lighting System) ................................................. 195
Light switch ............................................ 194
Replacing light bulbs ....................... 509
Headlights cleaner............................... 202
Heaters Air conditioning system ..................407
Heated steering wheel ..................... 416
Outside rear view mirrors ...............412
Seat heaters ............................................417
Hill-start assist control ........................ 292
Hood .......................................................... 468 Open ....................................................... 468
Hooks Cargo hooks ........................................425
Coat hooks ............................................ 431
Retaining hooks (floor mat) ............. 26
Horn ............................................................ 148 I/M test ..................................................... 465
Identification
Engine .................................................... 586
Vehicle ................................................... 585
Ignition switch (engine switch) ......... 178
Illuminated entry system ..................... 419
Immobilizer system ................................ 68
Indicators .....................................................78
Initialization Engine oil maintenance data ....... 475
Maintenance ........................................460
Moon roof .............................................. 160
Multi-information display.................. 95
Power windows................................... 155
Tire pressure warning system ...............................485
Initiators (tire pressure warning system) .................................. 491
Inside door handle lights ..................... 418
Inside rear view mirror......................... 149
Instrument panel light control ............ 84
Intercooler ...............................................478
Intercooler coolant............................... 476 Capacity................................................ 590
Checking ............................................... 476
Preparing and checking before winter .................................... 297
Interior lights ............................................ 419 Wattage .................................................595
Intuitive parking assist .......................... 251
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