2012 Lexus GX460 air condition

5
When trouble arises
683
5-1. Essential information
GX460_U.S.A. (OM60J00U)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
● 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
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
● 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, sp ongy feeling, pedal almost touches
the floor

5
When trouble arises
695
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The spare tire is also equipped with the 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, even though the flat tire is replaced with the spare tire,
the tire pressure warning light does not turn off. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.
■If the tire pressure warning system is inoperative
The tire pressure warning system will become inoperative in the following condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used.
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher.

744
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
If your vehicle overheats
If the engine overheats:
Stop the vehicle in a safe place and turn off the automatic 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 sub-
sides 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 engine coolant temperature gauge begins to
fall and then stop the engine.
If the fan is not operating: Stop the engine and call your local Lexus dealer.STEP1
STEP2
STEP3

774
6-1. Specifications
GX460_U.S.A. (OM60J00U)
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation
pressureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum loaded
vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight

796
6-2. Customization
GX460_U.S.A. (OM60J00U)
Front auto-
matic air
condition-
ing sys-
tem
*1,2
Efficient Venti-
lation Mode
(Enable/disable
switching of the
air intake con-
trol mode to
automatic when
the “AUTO”
switch ON)
OnOffO––O
Auto A/C
Mode
(Enable/disable
automatic oper-
ation of the air
conditioning
compressor
when the
“A U T O ” s w i t c h
ON)
OnOffO––O
ItemFunctionDefault settingCustomized setting

797
6-2. Customization
6
Vehicle specifications
GX460_U.S.A. (OM60J00U)
Front auto-
matic air
condition-
ing sys-
tem
*1,2
Smog Sensor
Sensitivity
(Adjust the sen-
sitivity of
exhaust gas
sensor used for
the Efficient
Ventilation
Mode)
Standard-3 to 3O––O
Front seats
(
→P. 63)
DRIVER’S
SEAT EASY
EXIT
(The distance
the driver’s seat
moves back-
ward when exit-
ing the vehicle
can be
selected)
Full
Off
O–OO
Pa r t i a l
ItemFunctionDefault settingCustomized setting

Index
817
GX460_U.S.A. (OM60J00U)
Abbreviation list ..................... 818
Alphabetical index ................. 820
What to do if... ........................ 832
For vehicles with a navigation system, refer to the “Naviga-
tion System Owner’s Manual” for information regarding
the equipment listed below.
• Navigation system
• Audio/video system
• Rear seat entertainment system
• Air conditioning
• Windshield wiper de-icer
• Rear window and outside rear view mirror defogging
• Hands-free system (for cellular phone)
• Intuitive parking assist
• Wide view front & side monitor
• Lexus Enform with Safety Connect

820
GX460_U.S.A. (OM60J00U)
Alphabetical index
Alphabetical index
A/CFront automatic air conditioning
system
*............................................... 392
Rear automatic air conditioning
system
*............................................... 407
ABS.............................................................335
Active traction control........................336
Adaptive front lighting system ........ 223
Adaptive variable suspension system...................................................... 321
AFS ............................................................. 223
Air conditioning filter .......................... 642
Air conditioning system Air conditioning filter ....................... 642
Front automatic air conditioning system
*............................................... 392
Rear automatic air conditioning system
*............................................... 407
Airbags Airbag deployment
conditions............................................. 126
Airbag precautions for your
child......................................................... 132
Airbag warning light ....................... 690
Front passenger occupant classification system........................139
General airbag precautions ............131
Locations of airbags........................... 122
Modification and disposal of airbags ...................................................136
Proper driving posture .....................120
Side airbag precautions ...................133
Side and curtain shield airbags deployment conditions ................. 127
Side and curtain shield airbag precautions .........................................134
SRS airbags ............................................ 122 Alarm............................................................ 117
Antenna .................................................... 420
Anti-lock brake system ...................... 335
Armrest .................................................... 554
Audio input.............................................. 459
Audio system
Antenna.................................................. 420
Audio input........................................... 459
AUX port .............................................. 459
CD player/changer ..........................423
iPod .......................................................... 440
MP3/WMA disc................................. 431
Optimal use ..........................................457
Portable music player ..................... 459
Radio ......................................................... 415
Steering wheel audio switch........ 460
USB memory ...................................... 448
Audio/video remote controls*
Audio/video system*
Automatic air conditioning system
Air conditioning filter ........................642
Front automatic air conditioning system
*...............................................392
Rear automatic air conditioning
system
*.............................................. 407
Automatic light control system.........219
Automatic transmission Automatic transmission ...................186
If the shift lever cannot be shifted from P ................................................... 737
S mode .....................................................189
AUX port
*.............................................. 459
Auxiliary box .............................. 533, 560
AVS..............................................................321
A