2012 Lexus GS350 air condition

7166-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
Right side instrument panel
Left-hand drive vehicles
FuseAmpereCircuit
1P/SEAT1 F/R30Power seats
2FR P/OUTLET15Power outlet (front)
3RR P/OUTLET15Power outlet (rear)
4P/SEAT2 F/R25Power seats
5AV S20AV S
6STRG HTR15Heated steering wheel
7WA S H20Windshield washer
8RH ECU-IG10Navigation system, pre-crash seat belts,
air conditioning system
9RH-IG10
Tension reducer, seat heater/ventilator
switches, AWD system, front right-hand
door ECU, nanoe, CAN gateway ECU,
tire pressure warning system, power
seats, driver monitor system
10DOOR FR30
Front right-hand door control system
(outside rear view mirror defoggers,
power window)

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

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.

7737-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
Wa r n i n g m e s s a g eDetailsCorrection procedure
(If equipped)
Indicates that the tire
position information
cannot be recognized
Drive for a short while
and check if the display
updates.
If the radio wave
conditions improve,
the display may
return to normal. If
the tire pressure is
still not displayed
after driving for sev-
eral minutes, stop the
vehicle in a safe
place, turn the engine
switch off then on
again, and start driv-
ing.
If the tire pressure is
still not displayed
even after repeating
this several times,
have the vehicle
inspected by any
authorized Lexus
dealer or repairer, or
another duly quali-
fied and equipped
professional.

8147-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
CAUTION
When fixing the flat tire
Stop your vehicle in a safe and flat area.
Connect the valve and hose securely with the tire installed on the vehicle.
If the hose is not properly connected to the valve, air leakage may occur or
sealant may be sprayed out.
If the hose comes off the valve while inflating the tire, there is a risk that
the hose will move abruptly due to air pressure.
After inflation of the tire has completed, the sealant may splatter when the
hose is disconnected or some air is let out of the tire.
Keep back from the tire while it is being repaired, as there is a chance of it
bursting while the repair operation is being performed. If you notice any
cracks or deformation of the tire, turn off the compressor switch and stop
the repair operation immediately.
The kit may overheat if operated for a long period of time. Do not operate
the compressor continuously for more than 10 minutes.
Parts of the kit become hot during operation. Be careful handling the kit
during and after operation.
Do not attach the vehicle speed warning sticker to an area other than the
one indicated. If the sticker is attached to an area where an SRS airbag is
located, such as the pad of the steering wheel, it may prevent the SRS air
bag from operating properly.
Driving to spread the liquid sealant evenly
Drive the vehicle carefully at a low speed. Be especially careful when
turning and cornering.
If the vehicle does not drive straight or you feel a pull through the steering
wheel, stop the vehicle and check the following:
• Tire condition. The tire may have separated from the wheel.
• Tire inflation pressure. If tire inflation pressure is 130 kPa (1.3 kgf/cm
2
or bar, 19 psi) or below, this may indicate severe tire damage.

8307-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
If your vehicle overheats
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam subsides
and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the instru-
ment panel) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call any authorized Lexus
dealer or repairer, or another duly qualified and equipped profes-
sional.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core (radi-
ator) for any leaks.
If the engine compartment cover
needs to be removed: P. 6 6 1
1
2
3
4

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
A

881Alphabetical index
GS350/250_EE (OM30C36E)
Engine switch ............................207
EPS (Electric Power Steering) ..334
Function ................................334
Warning light........................751
Warning message..................762
First-aid kit storage net..............621
Flat tire
Vehicles with a spare tire .....783
Vehicles without a spare tire 798
Floor mats....................................34
Fluid
Automatic transmission ........848
Brake ....................................849
Washer ..................................671
Fog lights ...................................239
Replacing light bulbs ....724, 735
Switch ...................................239
Wattage .................................853
Follow me home system............229
Footwell light ............................611
Front air conditioning system....409
Front fog lights ..........................239
Replacing light bulbs ............724
Switch ...................................239
Wattage .................................853
Front personal lights ..................612
Front position lights ..................228
Light switch ..........................228
Replacing light bulbs ............735
Welcome light illumination
control ................................123Front seats................................. 157
Adjustment........................... 157
Cleaning ............................... 648
Correct driving posture .......... 36
Driving position memory..... 162
Head restraints ..................... 168
Power easy access system.... 166
Seat heaters .......................... 631
Seat position memory .......... 162
Seat ventilators .................... 632
Front turn signal lights ............. 223
Replacing light bulbs ........... 726
Turn signal lever .................. 223
Wattage ................................ 853
Fuel ........................................... 249
Capacity ............................... 838
Fuel gauge.............................. 99
Fuel pump shut off system... 748
Information .......................... 854
Refueling ............................. 249
Type ............................. 249, 838
Warning light ....................... 752
Warning messages ............... 769
Fuel filler door .......................... 249
If the fuel filler door
cannot be opened ............... 252
Refueling ............................. 249
Fuel pump shut off system ....... 748
Fuses ......................................... 700
F