2012 Lexus GS350 air suspension

501-1. For safe use
GS350/250_EE (OM30C36E)
CAUTION
SRS airbag precautions
Do not strike or apply significant levels of force to the area of the SRS air-
bag components.
Doing so can cause the SRS airbags to malfunction.
Do not touch any of the component parts immediately after the SRS air-
bags have deployed (inflated) as they may be hot.
If breathing becomes difficult after the SRS airbags have deployed, open a
door or window to allow fresh air in, or leave the vehicle if it is safe to do
so. Wash off any residue as soon as possible to prevent skin irritation.
If the areas where the SRS airbags are stored, such as the steering wheel
pad, door of the glove box and front and rear pillar garnishes are damaged
or cracked, have them replaced by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifica-
tions without consulting any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional. The SRS airbags may malfunc-
tion or deploy (inflate) accidentally, causing death or serious injury.
Installation, removal, disassembly and repair of the SRS airbags
Repairs, modifications, removal or replacement of the steering wheel,
instrument panel, dashboard, glove box, seats or seat upholstery, front,
side and rear pillars or roof side rails
Repairs or modifications of the front fender, front bumper, or side of the
occupant compartment
Installation of snow plows, winches, etc. to the front grille (bull bars or
kangaroo bar etc.)
Modifications to the vehicle’s suspension system
Installation of electronic devices such as an RF-transmitter and CD play-
ers
Modifications to your vehicle for a person with a physical disability

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4 4-1. Before driving
Driving
GS350/250_EE (OM30C36E)
NOTICE
When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may
cause the following serious damage to the vehicle:
Engine stalling
Short in electrical components
Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be
sure to have any authorized Lexus dealer or repairer, or another duly quali-
fied and equipped professional check the following:
Brake function
Changes in quantity and quality of oil and fluid used for the engine, trans-
mission, transfer (AWD models), differential, etc.
Lubricant condition for the propeller shaft, bearings and suspension joints
(where possible), and the function of all joints, bearings, etc.

2824-5. Using the driving support
GS350/250_EE (OM30C36E)
CAUTION
Situations unsuitable for LKA
Do not use LKA in any of the following situations.
Otherwise, the system may not function correctly and could result in an
accident.
When driving with snow tires, tire chains, a spare tire, or similar equip-
ment
When the tires have been excessively worn, or when the tire inflation
pressure is low
When there are objects or structures along the roadside that might be mis-
interpreted as lane markers (such as guardrails, curb, reflector posts, etc.)
When driving on snowy roads
When pavement lane markers are difficult to see due to rain, snow, fog,
etc.
When there are visible lines on the pavement from road repairs, or if the
remains of old lane markers are still visible on the road
When driving on slippery roads, such as those covered with rain, ice or
snow
When driving in a lane other than the driving or passing lanes on a free-
way or highway
When driving on a road with lane closures due to maintenance, or when
driving in a temporary lane
When towing a trailer
NOTICE
To prevent damage to or incorrect operation of the LKA system
Do not modify the headlights or attach stickers to the surface of the lights.
Do not modify the suspension, or replace them with non-genuine parts.
Do not install or place anything on the hood or the grille. Also, do not
install a grille guard (bull bars, kangaroo bar etc.).
Do not modify the sun visor or replace it with anything other than a genu-
ine Lexus product.
If your windshield needs repairs, contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.

2944-5. Using the driving support
GS350/250_EE (OM30C36E)
Lexus parking assist-sensor display
When an obstacle is detected while the rear view monitor system, is in use,
the warning indicator will appear in the top right of the screen even if the dis-
play setting has been set to off.
Sensor detection information
The sensor’s detection areas are limited to the areas around the vehicle’s
front corner and rear bumpers.
Certain vehicle conditions and the surrounding environment may affect the
ability of the sensor to correctly detect obstacles. Particular instances where
this may occur are listed below.
• There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve
this problem.)
• The sensor is frozen. (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen the screen may show an
abnormal display, or obstacles may not be detected.
• The sensor is covered in any way.
• The vehicle is leaning considerably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass.
• The vicinity of the vehicle is noisy due to vehicle horns, motorcycle
engines, air brakes of large vehicles, or other loud noises producing
ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the
vicinity.
• The sensor is coated with a sheet of spray or heavy rain.
• The vehicle is equipped with a fender pole or wireless antenna.
• Towing eyelets are installed.
• The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb.
• In harsh sunlight or intense cold weather.
• The area directly under the bumpers is not detected.
• If obstacles draw too close to the sensor.
• A non-genuine Lexus suspension (lowered suspension etc.) is installed.
• People may not be detected if they are wearing certain types of clothing.
In addition to the examples above, there are instances in which, because of
their shape, signs and other objects may be judged by the sensor to be closer
than they are.

3404-5. Using the driving support
GS350/250_EE (OM30C36E)
CAUTION
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 tires are inflated to the
recommended tire inflation pressure level.
The ABS, TRC and VSC systems will not function correctly if different
tires are installed on the vehicle.
Contact any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional for further information when replacing tires or
wheels.
Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will
affect the driving assist systems, and may cause a system to malfunction.

6526-2. Maintenance
GS350/250_EE (OM30C36E)
Where to go for service?
In order to maintain your vehicle in the best possible condition, Lexus rec-
ommends that all repairs and service operations be carried out by authorized
Lexus dealers or repairers or other duly qualified and equipped professionals.
For repairs and services covered by your warranty, please visit an authorized
Lexus dealer or repairer, who will use genuine Lexus parts in repairing any
difficulties you may encounter. There can also be advantages in utilizing
authorized Lexus dealers or repairers for non-warranty repairs and services,
as members of the Lexus network will be able to expertly assist you with any
difficulties you may encounter.
Your Lexus dealer or repairer, or another duly qualified and equipped profes-
sional will perform all of the scheduled maintenance on your vehicle reliably
and economically due to their experience with Lexus vehicles.
Does your vehicle need repairs?
Be on the alert for changes in performance and sounds, and visual tip-offs
that indicate service is needed. Some important clues are:
Engine missing, stumbling or pinging
Appreciable loss of power
Strange engine noises
A fluid leak under the vehicle (However, water dripping from the air condi-
tioning system after use is normal.)
Change in exhaust sound (This may indicate a dangerous carbon monoxide
leak. Drive with the windows open and have the exhaust system checked
immediately.)
Flat-looking tires, excessive tire squeal when cornering, uneven tire wear
Vehicle pulls to one side when driven straight on a level road
Strange noises related to suspension movement
Loss of brake effectiveness, spongy feeling brake pedal, pedal almost
touches the floor, vehicle pulls to one side when braking
Engine coolant temperature continually higher than normal (P. 9 9 )
If you notice any of these clues, take your vehicle to any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional as
soon as possible. Your vehicle may need adjustment or repair.

747
7 7-2. Steps to take in an emergency
When trouble arises
GS350/250_EE (OM30C36E)
If you think something is wrong
Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
Flat-looking tires or uneven tire wear
Engine coolant temperature gauge needle continually points
higher than normal.
Changes in exhaust sound
Excessive tire squeal when cornering
Strange noises related to the suspension system
Pinging or other noises related to the engine
Engine missing, stumbling or running roughly
Appreciable loss of power
Vehicle pulls heavily to one side when braking
Vehicle pulls heavily to one side when driving on a level road
Loss of brake effectiveness, spongy feeling, pedal almost
touches the floor
If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped profes-
sional as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

876Alphabetical index
GS350/250_EE (OM30C36E)
Alphabetical index
A/C ............................................409
Air conditioning filter ...........695
Front automatic air
conditioning system ...........409
Rear air conditioning system 425
S-FLOW mode .....................419
ABS (Anti-lock Brake System) .333
Function ................................333
Warning light........................750
Warning message..................761
Adaptive Front-lighting System
(AFS) ....................................230
Adaptive Variable Suspension
system (AVS)..........................334
AFS (Adaptive Front-lighting
System) ..................................230
Air conditioning filter ...............695
Air conditioning system ............409
Air conditioning filter ...........695
Front automatic air
conditioning system ...........409
Rear air conditioning system 425
S-FLOW mode .....................419Airbags ....................................... 44
Airbag manual on-off system 56
Airbag operating conditions .. 51
Airbag precautions for
your child ............................ 47
Airbag warning light............ 750
Correct driving posture .......... 36
Curtain shield airbag operating
conditions ............................ 51
Curtain shield airbag
precautions .......................... 49
General airbag precautions .... 47
Locations of airbags............... 44
Modification and disposal of
airbags ................................. 50
Side airbag operating
conditions ............................ 51
Side airbag precautions.......... 47
Side and curtain shield airbags
operating conditions ............ 51
Side and curtain shield airbags
precautions .......................... 47
SRS airbags............................ 44
Airbag manual on-off system ..... 56
Alarm .......................................... 86
Alarm ..................................... 86
Warning buzzer............ 749, 757
Anchor brackets.......................... 69
Antennas (smart entry &
start system) .......................... 125
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