2018 Lexus GS300 headlight

224
GS350_300_GS F_OM_OM30G34U_(U)4-3. Operating the lights and wipers
Wiper intervals can be adjusted when
intermittent operation is selected.
Increases the intermittent windshield
wiper frequency
Decreases the intermittent wind-
shield wiper frequency
Washer/wiper dual operation
Wipers will automatically operate a cou-
ple of times after the washer squirts.
Vehicles with headlight cleaners:
When the headlights are on and the
lever is pulled and held, the headlight
cleaners will operate once. After this,
the headlight cleaners will operate
every 5th time the lever is pulled.
Rain-sensing windshield wipers

(U.S.A.) or (Canada)
Move the lever up 2 levels
Move the lever up 1 level

(U.S.A.) or (Canada)
Move the lever down 1 level

(U.S.A.) or (Canada)
Move the lever down 2 levels
AUTO mode on/off switch
5
6
7
AUTO mode
indicator
1
2
3
4
5

GS350_300_GS F_OM_OM30G34U_(U)
2254-3. Operating the lights and wipers
4
Driving
With AUTO mode selected, the wipers will operate automatically when the sensor
detects falling rain. The system automatically adjusts wiper timing in accordance with
rain volume and vehicle speed.
AUTO mode indicator will turn on when AUTO mode is selected.
*1: After temporary operation, the mode will return to AUTO mode.
*2: AUTO mode will be canceled.
When AUTO mode is selected, the sensor sensitivity can be adjusted by turning
the switch ring.
Increases the sensitivity
Decreases the sensitivity
Washer/wiper dual operation
Wipers will automatically operate a cou-
ple of times after the washer squirts.
Vehicles with headlight cleaners:
When the headlights are on and the
lever is pulled and held, the headlight
cleaners will operate once. After this,
the headlight cleaners will operate
every 5th time the lever is pulled.
or or
or
OffTemporary operationTemporary operationLow speedoperationHigh speed operation
Low speed operationOffOffHigh speed operationHigh speed operation
High speed
operationOffLow speedoperationNo changeNo change
AUTO modeIntermittent operation
Off
Temporary
operation
*1Low speed
operation
*2High speed
operation
*2
ContinuouslyNo change
Operation
Status
before
operation
6
7
8

246
GS350_300_GS F_OM_OM30G34U_(U)4-5. Using the driving support systems
■Situations in which the system may not operate properly
●In some situations such as the following, a vehicle may not be detected by the radar
sensor and camera sensor, preventing
the system from operating properly:
• If an oncoming vehicle is approaching your vehicle
• If a vehicle ahead is a motorcycle or bicycle
• When approaching the side or front of a vehicle
• If a preceding vehicle has a small rear end, such as an unloaded truck
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead is irregularly shap ed, such as a tractor or side car
• If the sun or other light is shin ing directly on a vehicle ahead
• If a vehicle cuts in front of your ve hicle or emerges from beside a vehicle
• If a vehicle ahead makes an abrupt maneuver (such as sudden swerving, accelera-
tion or deceleration)
• When suddenly cutting behind a preceding vehicle
• When driving in inclement we ather such as heavy rain, fog, snow or a sandstorm
• When the vehicle is hit by water, sn ow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the surrounding brightness changes suddenly, such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun or the headlights of on coming traffic, shines
directly into the camera sensor
• When the surrounding area is dim, such as at dawn or dusk, or while at night or in a tunnel
• If a preceding vehicle has a low rear end,
such as a low bed trailer
• If a vehicle ahead has extremely high ground clearance
• When a vehicle ahead is not directly in front of your vehicle

252
GS350_300_GS F_OM_OM30G34U_(U)4-5. Using the driving support systems
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. Th
e LKA system does not automatically drive
the vehicle or reduce the amount of attention that must be paid to the area in front of
the vehicle. The driver must always assume full responsibility for driving safely by pay-
ing careful attention to the surrounding cond itions and operating the steering wheel to
correct the path of the vehicle. Also, the driver must take adequate breaks when
fatigued, such as from driving for a long period of time.
Failure to perform appropriate driving operat ions and pay careful attention may lead to
an accident, resulting in death or serious injury.
■To avoid operating LKA system by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA system
Do not use the LKA system in the following situations.
The system may not operate properly and lead to an accident, resulting in death or
serious injury.
●A spare tire, tire chains, etc. are equipped.
●When the tires have been excessively worn, or when the tire inflation pressure is low.
●Tires which differ by structure, manufacturer, brand or tread pattern are used.
●Objects or patterns that could be mistaken for white (yellow) lines are present on the
side of the road (guardrails, cu rbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc. are present due to road repair.
●Vehicle is driven in a temporary lane or restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather, fallen snow,
freezing, etc.
●Vehicle is driven in traffic lanes ot her than on highways and freeways.
●Vehicle is driven in a construction zone.
■Preventing LKA system malfunctions and operations perf ormed by mistake
●Do not modify the headlights or place stickers, etc. on the surface of the lights.
●Do not modify the suspension etc. If the suspension etc. needs to be replaced, con-
tact your Lexus dealer.
●Do not install or place anything on the hood or grille. Also, do not install a grille guard
(bull bars, kangaroo bar, etc.).
●If your windshield needs repair s, contact your Lexus dealer.

256
GS350_300_GS F_OM_OM30G34U_(U)4-5. Using the driving support systems
GS F: When the system determines that the driver has removed the hands from the
steering wheel while the steering assist function or lane centering function is operating, a
warning message is displayed on the multi-information display.
If the driver continues to keep the hands off of the steering wheel, a warning message is
displayed and the function is temporarily canc eled. This alert also operates in the same
way when the driver continuously operates the steering wheel only a small amount.
However, depending on the road conditions, etc., the function may not cancel.
■White (yellow) lines are only on one side of road
The LKA system will not operate for the side on which white (yellow) lines could not be
recognized.
■Conditions in which functions may not operate properly
In the following situations, the camera sensor may not detect white (yellow) lines and var-
ious functions may not operate normally.
●There are shadows on the road that run parallel with, or cover, the white (yellow) lines.
●The vehicle is driven in an ar ea without white (yellow) lines, such as in front of a tollgate
or checkpoint, or at an intersection, etc.
●The white (yellow) lines are cracked, “Botts ’ dots”, “Raised pavement marker” or stones
are present.
●The white (yellow) lines cannot be seen or are difficult to see due to sand, etc.
●The vehicle is driven on a road surface that is wet due to rain, puddles, etc.
●The traffic lines are yellow (which may be more difficult to recognize than lines that are
white).
●The white (yellow) lines cross over a curb, etc.
●The vehicle is driven on a bright surface, such as concrete.
●The vehicle is driven on a surface that is bright due to reflected light, etc.
●The vehicle is driven in an area where the brightness changes suddenly, such as at the
entrances and exits of tunnels, etc.
●Light from the headlights of an oncoming vehicle, the sun, etc. enters the camera.
●The vehicle is driven where the road diverges, merges, etc.
●The vehicle is driven on a slope.
●The vehicle is driven on a road which tilts left or right, or a winding road.
●The vehicle is driven on an unpaved or rough road.
●The vehicle is driven around a sharp curve.
●The traffic lane is excessively narrow or wide.
●The vehicle is extremely tilted due to carry ing heavy luggage or having improper tire
pressure.
●The distance to the preceding vehicle is extremely short.
●The vehicle is moving up and down a large am ount due to road conditions during driv-
ing (poor roads or road seams).
●The headlight lenses are dirty and emit a faint amount of light at night, or the beam axis
has deviated.
●The vehicle is struck by a crosswind.
●The vehicle has just changed lane s or crossed an intersection.
●Snow tires, etc. are equipped.

357
GS350_300_GS F_OM_OM30G34U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior ................358
Cleaning and protecting the vehicle interior.................. 362
6-2. Maintenance Maintenance requirements ... 365
General maintenance.............. 367
Emission inspection and maintenance (I/M)
programs .................................... 370
6-3. Do-it-yourself maintenance Do-it-yourself service precautions..................................371
Hood ............................................... 373
Positioning a floor jack ............ 374
Engine compartment ............... 376
Tires ................................................. 393
Tire inflation pressure...............403
Wheels ...........................................406
Air conditioning filter .............. 408
Electronic key battery ............... 410
Checking and replacing fuses ................................................412
Headlight aim (vehicles with single-beam headlights)........ 416
Light bulbs...................................... 418

368
GS350_300_GS F_OM_OM30G34U_(U)6-2. Maintenance
*: Vehicles with sing
le-beam headlights
Vehicle interior
ItemsCheck points
Accelerator pedal• The accelerator pedal should move smoothly
(without uneven pedal effort or catching).
Automatic transmission “Park”
mechanism• When parked on a slope and the shift lever is in P,is the vehicle securely stopped?
Brake pedal
• Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clearance
from the floor? ( →P. 527)
• Does the brake pedal have the correct amount of
free play? ( →P. 527)
Brakes
• The vehicle should not pull to one side when the
brakes are applied.
• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to the floor when the brakes are applied.
Head restraints• Do the head restraints move smoothly and lock
securely?
Indicators/buzzers• Do the indicators and buzzers function properly?
Lights• Do all the lights come on?
• Are the headlights aimed correctly?
* (→ P. 416)
Parking brake• Moves smoothly?
• When parked on a slope and the parking brake is
on, is the vehicle securely stopped?
Seat belts• Do the seat belts operate smoothly?
• The seat belts should not be damaged.
Seats• Do the seat controls operate properly?
Steering wheel
•Does the steering wh eel rotate smoothly?
• Does the steering wheel have the correct amount
of free play?
• There should not be any strange sounds coming from the steering wheel.

371
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself service precautions
*: Vehicles with sing
le-beam headlights
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
Battery condition
(→ P. 390)•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 389)
• FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/intercooler
coolant level
(→ P. 386)
•“Toyota Super Long Life Coolant” or a similar high quality
ethylene glycol-based non-silicate, non-amine, non-nitrite
and non-borate coolant with long-life hybrid organic acid
technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Cool ant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 381)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 412)• Fuse with same amperage rating as original
Headlight aim*
( → P. 416)• Phillips-head screwdriver
Light bulbs
(→ P. 418)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Radiator and con-
denser (→P. 388)⎯
Tire inflation pres-
sure (→P. 403)• Tire pressure gauge• Compressed air source
Washer fluid
(→ P. 392)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)