2012 Lexus GS350 light

7537-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
*1: Open door warning buzzer:
P. 7 6 3
*2: Driver’s and front passenger’s seat belt buzzer:
The driver’s and front passenger’s seat belt buzzer sounds to alert the
driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 30 seconds after the vehicle reaches a
speed of 20 km/h (12 mph). Then, if the seat belt is still unfastened, the
buzzer will sound in a different tone for 90 more seconds.
Tire pressure warning light
When the light comes on:
Low tire inflation pressure
such as
• Natural causes (P.
754)
• Flat tire (P. 783, 798)
Adjust the tire inflation pres-
sure (including the full-size
spare tire) to the specified
level.
The light will turn off after
a few minutes. In case the
light does not turn off even
if the tire inflation pressure
is adjusted, have the sys-
tem checked by any autho-
rized Lexus dealer or
repairer, or another duly
qualified and equipped
professional.
When the light comes on
after blinking for 1 minute:
Malfunction in the tire pres-
sure warning systemHave the system checked by
any authorized Lexus dealer
or repairer, or another duly
qualified and equipped pro-
fessional.
Wa r n i n g
lightWarning light/DetailsCorrection procedure

7547-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Front passenger detection sensor, seat belt reminder and warning buzzer
If luggage is placed on the front passenger seat, the front passenger detec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.
If a cushion is placed on the seat, the sensor may not detect a passenger, and
the warning light may not operate properly.
If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empty, refuel the vehicle immediately. The
malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional
as soon as possible.
When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered suf-
ficiently.
Check the tire inflation pressure and adjust to the appropriate level.
If the warning light does not go out even after several minutes, check that
the tire inflation pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted
without first allowing the tire temperature to lower sufficiently.
The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as
natural air leaks and tire inflation pressure changes caused by temperature. In
this case, adjusting the tire inflation pressure will turn off the warning light
(after a few minutes).

7557-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
When a tire is replaced with a spare tire
Vehicles with a compact spare tire: The compact spare tire is not equipped
with a tire pressure warning valve and transmitter. If a tire goes flat, the tire
pressure warning light will not turn off even though the flat tire has been
replaced with the spare tire.
Vehicles with a full-size spare tire: The spare tire is also equipped with a tire
pressure warning valve and transmitter. The tire pressure warning light will
turn on if the tire inflation pressure of the spare tire is low. If a tire goes flat,
the tire pressure warning light will not turn off even though the flat tire has
been replaced with the spare tire.
Conditions that the tire pressure warning system may not function properly
P. 6 7 8
If the tire pressure warning light frequently comes on after blinking for 1 min-
ute
If the tire pressure warning light frequently comes on after blinking for 1
minute when the engine switch is turned to IGNITION ON mode, have it
checked by any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an
audio sound.

7567-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
CAUTION
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped profes-
sional. The vehicle will become extremely unstable during braking, and the
ABS system may fail, which could cause an accident resulting 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 operate using more force than usual.
If the tire pressure warning light comes on
Be sure to observe the following precautions. 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 infla-
tion pressure immediately.
If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, 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 any authorized Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
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.
NOTICE
Precaution when installing a different tire
When differently constructed tires or tires of different makers, models or
tread patterns are installed, the tire pressure warning system may not oper-
ate properly.

757
7 7-2. Steps to take in an emergency
When trouble arises
GS350/250_EE (OM30C36E)
If a warning message is displayed
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is currently
being displayed on the multi-infor-
mation display.
Multi-information display
If any of the warning light comes on again after the following
actions have been performed, contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
The following warning indicates a possible problem in the brake
system. Immediately stop the vehicle in a safe place and contact
any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
If a warning is shown on the multi-information display, stay calm
and perform the following actions:
1
2
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.
Wa r n i n g m e s s a g eDetails
Indicates the following:
• The brake fluid level is low; or,
• The brake booster system is malfunctioning.
A buzzer also sounds.

7587-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)A buzzer sounds and a warning message is shown on the multi-
information display. The following warning indicates the possibil-
ity of damage to the vehicle that may lead to an accident. Immedi-
ately stop the vehicle in a safe place and contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped
professional.
Stop the vehicle immediately.
Wa r n i n g m e s s a g eDetails
Indicates abnormal engine oil pressure
The warning light may come on if the engine
oil pressure is too low.

7607-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
(If equipped)
Indicates a malfunction in the Lexus parking-
assist sensor
The malfunctioning assist-sensor is flashing.
Indicates a malfunction in the dynamic radar
cruise control system (if equipped) or the cruise
control system
Press the “ON-OFF” button once to deactivate
the system, and then press the button again to
reactivate the system.
(If equipped)
Indicates a malfunction in the LKA (Lane-Keep-
ing Assist)
(If equipped)
Indicates a malfunction in the automatic head-
light leveling system
Wa r n i n g m e s s a g eDetails

7617-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
(If equipped)
Indicates a malfunction in the adaptive front-
lighting system
Indicates a malfunction in:
• The SRS airbag system; or,
• The seat belt pretensioner system
(If equipped)
Indicates a malfunction in the Automatic High
Beam system
Indicates a malfunction in:
•The ABS; or,
• The brake assist system
Indicates a malfunction in the parking brake sys-
tem
Wa r n i n g m e s s a g eDetails
(Flashes)