engine Lexus GS350 2020 Owner's Manual

GS350_GS F_OM_OM30J07U_(U)
3936-3. Do-it-yourself maintenance
6
Maintenance and care
If any washer does not work or the warning message appears on the multi-infor-
mation display, the washer tank may be empty. Add washer fluid.
Washer fluid
GS350GS F
WARNING
■When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains
alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces, as well as damaging
the pump leading to problems of the washer fluid not spraying.
■Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.

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GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
◆Initializing the tire pressure warning system
■The tire pressure warning system must be
initialized in the following circum-
stances:
●When rotating the tires.
●When the tire inflation pressure is changed such as when changing travel-
ing speed or load weight.
When the tire pressure warning system is initialized, the current tire inflation
pressure is set as the benchmark pressure.
■How to initialize the tire pressure warning system
Park the vehicle in a safe place and turn the engine switch off.
Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to th e specified cold tire inflation pressure
level. ( P. 525)
Make sure to adjust the tire pressure to the specified cold tire inflation pressure
level. The tire pressure warning system will operate based on this pressure level.
Turn the engine switch to IGNITION ON mode.
Press or on the meter control switch and select .
Press or on the meter control sw itch and select “Vehicle Settings”.
Then press .
Press or on the meter
control switch and select “TPMS”.
Then press and hold until a
message is displayed.
The message will be displayed on the
multi-information display and the tire
pressure warning light will blink
slowly 3 times.
When the message disappears, ini-
tialization is complete.
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GS350_GS F_OM_OM30J07U_(U)
3976-3. Do-it-yourself maintenance
6
Maintenance and care
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique ID
code. When replacing a tire pressure warning valve and transmitter, it is nec-
essary to register the ID code. Have the ID code registered by your Lexus
dealer.
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on a tire.
●You have tire damage such as cuts, splits, cracks deep enough to expose the fabric, and
bulges indicating internal damage
●A tire goes flat repeatedly or cannot be properly repaired due to the size or location of
a cut or other damage
If you are not sure, consult with your Lexus dealer.
■Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered, the tire
pressure warning system will not work proper ly. After driving for about 20 minutes, the
tire pressure warning light blinks for 1 minu te and stays on to indicate a system malfunc-
tion.
■Tire life
Any tire over 6 years old must be checked by a qualified technician even if it has seldom
or never been used or damage is not obvious.
■Routine tire inflation pressure checks
The tire pressure warning syst em does not replace routine tire inflation pressure checks.
Make sure to check tire inflat ion pressure as part of your routine of daily vehicle checks.
■When rotating the tires
Make sure that the engine switch is off. If the tires are rotated while the engine switch is in
IGNITION ON mode, the tire position information will not be updated.
If this accidentally occurs, either turn the engine switch to off and then to IGNITION ON
mode, or initialize the system after checking th at the tire pressure is properly adjusted.
■Low profile tires (except 225/50R17 tires)
Generally, low profile tires will wear more rapidly and tire grip performance will be
reduced on snowy and/or icy roads when comp ared to standard tires. Be sure to use
snow tires or tire chains on snowy and/or icy roads and drive carefully at a speed appro-
priate for road and weather conditions. ( P. 307)

GS350_GS F_OM_OM30J07U_(U)
3996-3. Do-it-yourself maintenance
6
Maintenance and care
■Situations in which the tire pressure warning system may not operate properly
●In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects th e radio wave signals is installed.
• If there is a lot of snow or ice on the vehi cle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extr emely higher than the specified level.
• If wheel without the tire pressure warning valve and transmitter are used.
• If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility that generates st rong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
If tire position information is not correctly displayed due to the radio wave conditions,
the display may be corrected by driving and changing the radio wave conditions.
●When the vehicle is parked, the time taken for the warning to start or go off could be
extended.
●When tire inflation pressure declines rapidly for example when a tire has burst, the
warning may not function.
■The initialization operation
●Make sure to carry out initialization afte r adjusting the tire inflation pressure.
Also, make sure the tires are cold before carryi ng out initialization or tire inflation pres-
sure adjustment.
●If you have accidentally turned the engine swit ch off during initialization, it is not neces-
sary to manually restart the in itialization again, as initialization will restart automatically
the next time the engine switch is turned to IGNITION ON mode.
●If you accidentally perform initialization when initialization is not necessary, adjust the
tire inflation pressure to the specified leve l when the tires are cold, and conduct initial-
ization again.
■When initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following cases, the set-
tings have not been recorded and the system will not operate properly. If repeated
attempts to record tire inflation pressure settings are unsuccessful, have the vehicle
inspected by your Lexus dealer.
●The initialization message is not displayed on the multi-information display when per-
forming initialization.
●After carrying out the initializat ion procedure, the tire pressure warning light blinks for 1
minute then stays on after driving for 20 minutes.

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GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Air conditioning filter
Turn the engine switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
Press the tabs and remove the filter
cover.
Press the tabs and remove the filter
case.
The air conditioning filter must be ch
anged regularly to maintain air condi-
tioning efficiency.
Removal method
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GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Checking and replacing fuses
Turn the engine switch off.
Open the fuse box cover.
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl
ace the fuses as necessary.
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Engine compartment (type A fuse
box)Engine compartment (type B fuse
box)
Push the tab in and lift the lid off. Push the tab in and lift the lid off.
Driver’s side instrument panelPassenger’s side instrument panel
Remove the lid. Remove the lid.

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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
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GS350_GS F_OM_OM30J07U_(U)
7When trouble arises
7-1. Essential informationEmergency flashers................... 424
If your vehicle has to be stopped in an
emergency .................................425
If the vehicle is trapped in rising water ................................426 7-2. Steps to take in an
emergency
If your vehicle needs to be towed................................ 427
If you think something is wrong ................ 433
Fuel pump shut off system ...... 434
If a warning light turns on or a warning buzzer
sounds.......................................... 435
If a warning message is displayed..................................... 442
If you have a flat tire (vehicles with spare tire) ......................... 473
If you have a flat tire (vehicles without spare tire)...................484
If the engine will not start ........498
If the parking brake cannot be released ............................... 500
If the electronic key does not operate properly .....................502
If the vehicle battery is discharged ................................ 505
If your vehicle overheats .........509
If the vehicle becomes stuck .............................................. 513

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GS350_GS F_OM_OM30J07U_(U)7-1. Essential information
Emergency flashers
Press the switch.
All the turn signal lights will flash.
To turn them off, press the switch once
again.
■Emergency flashers
If the emergency flashers are used for a long time while the engine is not operating, the
battery may discharge.
The emergency flashers are used to warn other drivers when the vehicle has
to be stopped in the road due to a breakdown, etc.

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GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
7-1. Essential information
If your vehicle has to be stopped in an emergency
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort required to
slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N
After slowing down, stop the vehicle in a safe place by the road.
Stop the engine.
If the shift lever cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehicle speed as
much as possible.
To stop the engine, press and hold
the engine switch for 2 consecutive
seconds or more, or press it briefly 3
times or more in succession.
Stop the vehicle in a safe place by the road.
Only in an emergency, such as if it becomes impossible to stop the vehicle in
the normal way, stop the vehicl e using the following procedure:
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Press and hold for 2 seconds or more
or press briefly 3 times or more
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WARNING
■If the engine has to be turned off while driving
Power assist for the brakes and steering wheel will be lost, making the brake pedal
harder to depress and the steering wheel heav ier to turn. Decelerate as much as possi-
ble before turning off the engine.
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