2020 Lexus GS350 brake light

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.

4577-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
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.
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.
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.
Indicates a malfunction in the brake hold system
A buzzer also sounds.
 Have the vehicle inspecte d by your Lexus dealer
immediately.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
(Flashes)

4617-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
Indicates that engine oil level is low
This message may ap pear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to
see if the message disappears.
A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates a malfunction in:
• The Automatic High Beam system (if equipped);
• The AFS (Adaptive Front-lighting System) (if
equipped); or
• The LED headlight system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
(GS F for Canada only)
Indicates that the brake pads are worn out
A buzzer also sounds
 Have the vehicle inspected visually by your Lexus
dealer.
Warning messageDetails/Actions

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)

4707-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
Con-
tinuous
• An attempt was made to lock thedoors using the sm art access sys-
tem with push-button start while
the electronic key was still inside
the vehicle.
• An attempt was made to lock either front door by opening a
door and putting the inside lock
button into the lock position, then
closing the door with the elec-
tronic key still inside the vehicle.
 Retrieve the electronic key
from the vehicle and lock the
doors again.
Once
• When the doors were unlocked
with the mechanical key and then
the engine swit ch was pressed,
the electronic key could not be
detected in the vehicle.
• The electronic key could not be
detected in the vehicle even after
the engine switch was pressed
two consecutive times.
 Touch the electronic key to the
engine switch while depressing
the brake pedal.
Once
An attempt was made to start the
engine with the shift lever in an
incorrect position.
Shift the shift lever to P and start
the engine.

Power was turned off due to the
automatic power off function.
Next time when starting the
engine, increase the engine
speed slightly and maintain that
level for approximately 5 min-
utes to recharge the battery.
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)

4807-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
Raise the vehicle until the tire is
slightly raised off the ground.
Remove all the wheel nuts and the
tire.
When resting the tire on the ground,
place the tire so that the wheel design
faces up to avoid scratching the wheel
surface.
4
5
WARNING
■Replacing a flat tire
●Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes will
be extremely hot. Touching these areas with hands, feet or other body parts while
changing a tire, etc. may result in burns.
●Failure to follow these precautions could cause the wheel nuts to loosen and the tire
to fall off, resulting in death or serious injury.
• Never use oil or grease on the wheel bolts or wheel nuts. Oil and grease may cause the wheel nuts to be excessively tightened, leading to
bolt or disc wheel damage. In addition, the oil or grease can cause the wheel nuts
to loosen and the wheel may fall off, causing a serious accident. Remove any oil or
grease from the wheel bolts or wheel nuts.
• Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m, 10.5 kgf•m) as soon as possible after changing wheels.
• When installing a tire, only use wheel nuts that have been specifically designed for
that wheel.
• If there are any cracks or deformations in the bolt screws, nut threads or bolt holes of the wheel, have the vehicle inspected by your Lexus dealer.

576What to do if... (Troubleshooting)
GS350_GS F_OM_OM30J07U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passe nger wearing the seat belts? (P. 437)
●The parking brake indicator is on
Is the parking brake released? ( P. 217)
Depending on the situation, other types of warning buzzer may also sound.
( P. 435, 442)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 79)
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. ( P. 442)
●When a warning light turns on or a warning message is displayed, refer to
P. 435, 442.A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

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
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