2020 Lexus GS350 headlights

GS350_GS F_OM_OM30J07U_(U)
3736-2. Maintenance
6
Maintenance and care
*: Vehicles with single-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. 524)
• Does the brake pedal have the correct amount of
free play? ( P. 524)
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. 417)
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.

376
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
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. 391)•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( P. 390)
• FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level
( P. 388)
•“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. 385)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( P. 413)• Fuse with same amperage rating as original
Headlight aim*
(  P. 417)• Phillips-head screwdriver
Light bulbs
( P. 419)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Radiator and con-
denser (P. 389)
Tire inflation pres-
sure (P. 404)• Tire pressure gauge• Compressed air source
Washer fluid
( P. 393)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

419
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Light bulbs
Check the wattage of the light bulb to be replaced. (
P. 528)
 P. 383
Front turn signal light (vehicles with single-beam headlights)
You may replace the following bulbs by yo urself. The difficulty level of replace-
ment varies depending on the bulb. If necessary bulb replacement seems diffi-
cult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
Preparing for light bulb replacement
Removing the engine compartment covers
Bulb locations
1

420
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
■Front turn signal light (vehicles with single-beam headlights)
For the left side only: Remove the
bolt and move the washer fluid
filler opening.
Turn the bulb base counterclock-
wise.
Remove the light bulb.
Replacing light bulbs
1
2
3

GS350_GS F_OM_OM30J07U_(U)
4216-3. Do-it-yourself maintenance
6
Maintenance and care
When installing, reverse the steps listed.
After installing the bulb base, secure the cord with the clips and if replacing the left
side bulb, make sure to install the bolt for the washer fluid fille r opening in its origi-
nal position.
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by your Lexus
dealer.
●Headlights
●Parking lights/daytime running lights
●Front side marker lights
●Front turn signal lights (vehic les with triple-beam headlights)
●Side turn signal lights
●Stop/tail lights
●Stop lights
●Rear side marker lights
●Rear turn signal lights
●Back-up lights
●High mounted stoplight
●License plate lights
●Outer foot lights
4
Right sideLeft side

422
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
■LED Lights
The lights other than the front turn signal light (vehicles with single-beam headlights) and
outer foot lights each consist of a number of LEDs. If any of the LEDs burn out, take your
vehicle to your Lexus dealer to have the light replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact your Lexus dealer for more information in the following situations:
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs

P. 416
WARNING
■Replacing light bulbs
●Turn off the lights. Do not attempt to replac e the bulb immediately after turning off the
lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is unavoid-
able to hold the glass portion, use and hold with a clean dry cloth to avoid getting
moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or water entering th e headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installing to prevent heat damage.

4657-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
Warning messageDetails/Actions
(If equipped)
Indicates that the Automati c High Beam switch was
pressed while the low beams were on
 Turn the high beam headlights on before pressing
the Automatic High Beam switch.
(If equipped)
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. 300)

498
GS350_GS F_OM_OM30J07U_(U)7-2. Steps to take in an emergency
If the engine will not start
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again follo
wing correct starting procedures.
( P. 203)
●There may be a malfunction in th e engine immobilizer system. (P. 77)
One of the following may be the cause of the problem:
●The battery may be discharged. ( P. 505)
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletio n or a blown fuse. However, an interim
measure is available to start the engine. ( P. 499)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. ( P. 505)
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
If the engine will not start even though correct starting procedures are being
followed (P. 203), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over
The starter motor does not turn over, the interior lights and headlights
do not turn on, or the horn does not sound.