ABS Lexus GS350 2020 User Guide

GS350_GS F_OM_OM30J07U_(U)
3034-5. Using the driving support systems
4
Driving
WARNING
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded. (such as excessively
worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehi cle’s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially in the following situations:
●When driving on dirt, grav el or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or uneven surfaces
■TRAC may not operate effectively when
Directional control and power may not be achievable wh ile driving on slippery road
surfaces, even if the TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist control is not intended to hold the vehicle
stationary for an exte nded period of time. Do not atte mpt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an accident.
■When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause an
accident. Exercise particular care when the indicator light flashes.

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GS350_GS F_OM_OM30J07U_(U)4-5. Using the driving support systems
WARNING
■When the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As these
are the systems to help ensure vehicle stability and driving force, do not turn the
TRAC/VSC systems off unless necessary.
■Expert mode precautions (GS F)
●Do not use on public roads.
●Use only when the road conditions and safety of the surrounding area can be
ensured.
●Proper use of expert mode requires a prof
essional level of driving skill. When using
expert mode, always check the road condit ions and surrounding area and drive more
carefully than usual.
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tire s are inflated to the recommended tire infla-
tion pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further in formation when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modi fying the suspension will affect the driving
assist systems, and may cause a system to malfunction.

390
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
■Checking fluid level
The brake fluid level should be between the “MAX” and “MIN” lines on the
tank.
■Adding fluid
Make sure to check the fluid type and prepare the necessary item.
■Brake fluid can absorb moisture from the air
Excess moisture in the brake fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid.
Brake fluid
GS350GS F
Fluid type
FMVSS No.116 DOT 3 or SAE J1703 brake fluid
Items Clean funnel
WARNING
■When filling the reservoir
Take care as brake fluid can harm your ha nds and eyes and damage painted surfaces. If
fluid gets on your hands or in your eyes, flush the affected area with clean water imme-
diately. If you still experience discomfort, see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear out or
when the fluid level in the accumulator is high.
If the reservoir needs frequent ref illing, there may be a serious problem.

409
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
1
2
3
4

435
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspecte d by your Lexus dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light (warning buzzer) •Low brake fluid
• Malfunction in the brake booster system
 Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
(If equipped)
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
 Immediately stop the vehicle in a safe place and contact your
Lexus dealer.
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system
 Have the vehicle inspected by your Lexus dealer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
 Have the vehicle inspected by your Lexus dealer immediately.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
• The ABS; or
• The brake assist system
 Have the vehicle inspected by your Lexus dealer immediately.

4407-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features: P. 542)
WARNING
■If both the ABS and the brake system 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 braking, 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.
If the steering wheel becomes heavier than usual when operating, hold firmly and oper-
ate 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.

4497-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
Indicates an engine malfunction A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates an engine malfunction
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupa nt classification system;
or,
• The seat belt pretensioner system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The ABS; or
• The brake assist system
A buzzer also sounds.
 Immediately stop the vehicle in a safe place and
contact your Lexus dealer. Continuing to drive the
vehicle may be dangerous.
Warning messageDetails/Actions
(U.S.A.) (Canada)
(U.S.A.) (Canada)

4837-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
WARNING
■When the spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components:
• AWD system
■Speed limit when using the spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a spar e tire is installed on
the vehicle.
The spare tire is not designed for driving at high speeds. Failure to observe this precau-
tion may lead to an accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibility of personal injury during a collision or sudden brak-
ing.
NOTICE
■Be careful when driving over bumps with the spare tire installed on the vehicle.
The vehicle may become lower when driving with the spare tire compared to when
driving with standard tires. Be careful when driving over uneven road surfaces.
■Driving with tire chains and the spare tire
Do not fit tire chains to the spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.
• ABS & Brake assist
• VSC
• TRAC
• Cruise control
• Dynamic radar cruise control with
full-speed range (if equipped)
• PCS (Pre-Collision System)
(if equipped)
• EPS
• AFS (if equipped)
• Adaptive Variable Suspension system
(if equipped)
• LKA (Lane-Keeping Assist)
(if equipped)
• Tire pressure warning system
• VDIM
• Lexus parking assist monitor
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• DRS (if equipped)
• VGRS (if equipped)
• LDH (if equipped)

578Alphabetical index
GS350_GS F_OM_OM30J07U_(U)
Alphabetical index
A/C ............................................................. 318Air conditioning filter....................... 409
Changing the rear seat settings .................................................325
Front automatic air conditioning system ................................................... 318
Micro dust and pollen filter ........... 324
Rear air conditioning system........329
S-FLOW mode ................................... 319
ABS (Anti-lock Brake System)....... 297 Function .................................................. 297
Warning light .......................................435
Warning message ............................. 442
Active Sound Control (ASC) ........... 221
Adaptive Front-lighting System (AFS) ...................................................... 223
Adaptive Variable Suspension system (AVS)...................................... 298
AFS (Adaptive Front-lighting System) .................................................. 223
Air conditioning filter .......................... 409
Air conditioning system ...................... 318 Air conditioning filter....................... 409
Changing the rear seat settings .................................................325
Front automatic air conditioning system ................................................... 318
Micro dust and pollen filter ........... 324
Rear air conditioning system........329
S-FLOW mode ................................... 319 Airbags .......................................................... 41
Airbag operating conditions .......... 48
Airbag precautions for your child ....................................... 44
Airbag warning light ........................ 435
Correct driving posture .................... 34
Curtain shield airbag operating conditions ....................... 48
Curtain shield airbag precautions .......................................... 46
Front passenger occupant classification system......................... 52
General airbag precautions ........... 44
Locations of airbags.............................. 41
Modification and disposal of airbags................................................47
Side airbag operating conditions ............................................. 48
Side airbag precautions .................... 44
Side and curtain shield airbags operating conditions ....................... 48
Side and curtain shield airbags precautions .......................................... 44
SRS airbags ............................................... 41
Alarm ............................................................ 79 Alarm ...........................................................79
Warning buzzer..................... 435, 442
Anchor brackets.......................................63
Antennas (smart access system with push-button start) ..................... 156
Anti-lock Brake System (ABS) ....... 297 Function .................................................. 297
Warning light ....................................... 435
Warning message............................. 442
A

595Alphabetical index
GS350_GS F_OM_OM30J07U_(U)
Warning buzzersApproach warning ............................ 273
Brake system........................................435
Downshifting ..........................................213
Intuitive parking assist
*
Key reminder .......................................470
Open door ............................................ 444
Open moon roof ...............................457
Open hood ........................................... 444
Open trunk ........................................... 444
Open window .....................................457
Seat belt reminder ............................. 437
Warning lights .......................................... 86 ABS ...........................................................435
AFS OFF indicator ............................436
Brake system............................435, 437
Charging system................................435
Electric power steering...................436
Low fuel level ....................................... 437
Malfunction indicator lamp ...........435
Master warning light......................... 437
Open door ............................................ 437
Parking brake indicator .................. 437
Pre-collision system..........................436
Seat belt reminder light................... 437
Slip indicator .........................................436
SRS ............................................................435
Tire pressure ........................................ 437 Warning messages...............................442
Washer ......................................................229
Checking ............................................... 393
Low washer fluid warning message........................... 442
Preparing and checking before winter ....................................305
Switch ...................................................... 229
Washing and waxing ...........................362
Weight Cargo capacity...................................200
Load limits .............................................200
Weight ......................................................516
Welcome light illumination control ..................................................... 144
Wheels Replacing ............................................... 407
Size ........................................................... 525
Window glasses....................................... 181
Window lock switch............................... 181
Windows..................................................... 181 Power windows..................................... 181
Rear window defogger .................. 324
Washer ................................................... 229
Windshield wiper de-icer ..................324
Windshield wipers ................................229 Position .................................................. 308
Rain-sensing windshield wipers................................................... 229
W
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.