2014 Lexus GX460 overheating

GX460_OM_OM60K80U_(U)
792. Instrument cluster
2
Instrument cluster
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument cluster brightness adjustment
The instrument cluster brightness levels when the tail lights are on and off can be
adjusted.
■The brightness of the in strument cluster lights
When the tail lights are on, the brightness will change. However, when the surroundings
are bright (daytime, etc.) turn ing on the tail lights will not change the instrument cluster
brightness.
In addition, the brightness of the instrument cluster lights is automatically adjusted based
on the light sensor detecting ho w bright the surroundings are.
■When disconnecting and reconnecting battery terminals
The trip meter data will be reset.
If the trip meter was displayed last, the odometer will be displayed after resetting.
■Customization
Setting of sensitivity of the ambient light sensor used for dimming the meter lights can be
changed. (Customizable features P. 5 7 8 )
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( P. 5 4 8 )

GX460_OM_OM60K80U_(U)
1734-1. Before driving
4
Driving
●Avoid jerky starts or sudden acceleration.
●Avoid jerky steering and sharp turns, and slow down before making a turn.
●Note that when making a turn, the trailer wheels will be closer than the vehicle
wheels to the inside of the turn. Comp ensate by making a wider than normal
turning radius.
●Slow down before making a turn, in crosswinds, on wet or slippery surfaces,
etc.
Increasing vehicle speed can destabilize the trailer.
●Take care when passing other vehicles. Passing requires considerable dis-
tance. After passing a vehicle, do not forget the length of your trailer, and be
sure you have plenty of room before changing lanes.
●To maintain engine braking efficiency and charging system performance
when using engine braking, do not put the transmission in D.
If in the S mode, the transmission shift range position must be in 5 or lower.
●Instability happens more frequently when descending steep or long downhill
grades. Before descending, slow down and downshift. Do not make sudden
downshifts while descending steep or long downhill grades.
●Avoid holding the brake pedal down too long or applying the brakes too fre-
quently. This could cause the brakes to overheat and result in reduced braking
efficiency.
●Due to the added load of the trailer, yo ur vehicle’s engine may overheat on hot
days (at temperatures over 85°F [30°C]) when driving up a long or steep
grade. If the engine coolant temperat ure gauge indicates overheating, imme-
diately turn off the air cond itioning (if in use), pull your vehicle off the road and
stop in a safe spot. ( P. 5 4 8 )

184
GX460_OM_OM60K80U_(U)4-2. Driving procedures
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if the
engine is turned on and off repeatedly in a sh
ort period of time. In this case, refrain from
running the engine. After about 10 seconds, the steering lock motor will resume func-
tioning.
■When the engine switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus dealer,
immediately.
■If the electronic key battery is depleted
 P. 4 7 9
■If the smart access system with push-butto n start has been deactivated in a customized
setting
 P. 5 4 3
The green indicator light on the engine switch
will flash and a message will be shown on the
multi-information display. Press the engine
switch again while turn
ing the steering wheel
left and right.
CAUTION
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the accelerator
pedal while starting the engine under any circumstances.
Doing so may cause an accident resu lting in death or serious injury.
■Caution while driving
If engine failure occurs while the vehicle is moving, do not lock or open the doors until
the vehicle reaches a safe and complete stop. Activation of the steering lock in this cir-
cumstance may lead to an accident, re sulting in death or serious injury.
■Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and hold
the engine switch for more than 2 seconds, or press it briefly 3 times or more in succes-
sion. ( P. 499)
However, do not touch the engine switch while driving except in an emergency. Turning
the engine off while driving will not cause lo ss of steering or braking control, but the
power assist to these systems will be lost. Th is will make it more difficult to steer and
brake, so you should pull over and stop the vehicle as soon as it is safe to do so.

389
GX460_OM_OM60K80U_(U)5-1. Using the air conditio
ning system and defogger
5
Interior features
Heated steering wheel/seat heaters/seat
ventilators

Turns the heated steering wheel on/off
The indicator light comes on when the
heated steering wheel is operating.
: If equipped
Heated steering wheel and seat heater s heat the side grips of the steering
wheel and seats. Seat ventilators maintain good airflow by blowing air from
the seats.
CAUTION
●Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel an d seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (s leeping drugs, cold
remedies, etc.)
●Observe the following precautions to prevent the minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE
●Do not put heavy objects that have an uneven surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat.
●To prevent battery discharge, do not use the functions when the engine is off.
Heated steering wheel (if equipped)

GX460_OM_OM60K80U_(U)
4155-4. Using the other interior features
5
Interior features
CAUTION
■Using a power outlet (120 V AC)
Observe the following precautions to reduce the risk of injury.
●Use of the power outlet when it is wet with water or snow may result in electrical
shocks and is extremely dangerous. The power outlet must be thoroughly dried
before use.
●Do not allow children to use or play with the power outlet.
●Be careful not to get any part of your body caught in the power outlet lid.
●When using electrical appliances, strictly follow any cautions and notices written on
their labels and in the manufacturers’ instruction manuals.
●Do not modify, disassemble or repair the power outlet or its inverter in any way. Doing
so may result in unexpected malfunctions or accidents, which could cause serious
damage or injuries. Contact your Le xus dealer for any necessary repairs.
■To prevent injuries and accidents, secure a ll electric appliances before use and do not
use any appliances that may do any of the following (120 V AC):
●Distract the driver while driv ing, or hamper safe driving.
●Result in a fire or burn injuries due to th e appliance rolling, falling or overheating while
driving.
●Emit steam while the windows of the cabin are closed.
■To prevent unexpected accidents, such as electric shocks, do not perform any of the
following actions (120 V AC):
●Using the power outlet for electric heaters while sleeping.
●Contaminating the power outlet with liquid substances or mud.
●Handling electrical appliance plugs at the power outlet with wet hands or feet.
●Inserting foreign objects into the power outlet.
●Using malfunctioning electric appliances.
●Inserting inappropriate or badly fi tting plugs into the power outlet.

548
GX460_OM_OM60K80U_(U)7-2. Steps to take in an emergency
If your vehicle overheats
Stop the vehicle in a safe place and tu
rn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( P. 7 7 ) e n t e r s t h e
red zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.)
●Steam is coming from under the hood.
Correction procedures
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2
3
1
2

609Alphabetical index
GX460_OM_OM60K80U_(U)
Bottle holders ......................................... 399
BrakeFluid............................................................ 561
Parking brake.......................................... 191
Warning light ...................................... 507
Brake assist ...............................................341
Break-in tips............................................. 150
Brightness control Instrument panel light control ..................................................... 78
BSM (Blind Spot Monitor)................ 347
Care ................................................ 434, 437 Aluminum wheels ..............................434
Exterior....................................................434
Interior ..................................................... 437
Seat belts ............................................... 438
Cargo hooks .......................................... 402
Center differential................................ 332
CD player
*
Chains ....................................................... 366
Child restraint system............................ 52 Booster seats, definition ....................53
Booster seats, installation....................61
Convertible seats, definition ............ 53
Convertible seats, installation ............................................. 58
Installation with LATCH system ..................................................... 57
Installing CRS with seat belts ......... 58
Installing CRS with top straps..................................... 62 Infant seats, definition.......................... 53
Infant seats, installation....................... 58
Child safety .................................................. 51 Airbag precautions...............................37
Back door precautions...................... 101
Battery precautions ..............460, 547
Child restraint system......................... 52
Glass hatch precaution ................... 105
How your child should wear the seat belt .......................................... 30
Installing child restraints .................... 56
Moon roof precautions ....................148
Power window lock switch............. 142
Power window precautions ........... 144
Rear door child-protectors ............. 95
Removed key battery precautions ...................................... 480
Seat belt precautions ............................ 31
Seat heater precautions .................390
Child-protectors ..................................... 95
Cleaning Aluminum wheels .............................. 434
Exterior ................................................... 434
Interior ..................................................... 437
Seat belts................................................438
Coat hooks ............................................... 417
Compass ................................................... 419
Condenser...............................................457
Console box ........................................... 396
Cool box .................................................. 409
Cooling system ..................................... 455 Engine overheating ..........................548
Conversation mirror............................. 412
C
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

611Alphabetical index
GX460_OM_OM60K80U_(U)
Emergency flashers ............................. 498
EngineAccessory mode................................. 182
Compartment....................................... 451
Hood ....................................................... 450
How to start the engine ..................... 181
Identification number ...................... 556
If the engine will not start............... 540
Ignition switch (engine switch)....... 181
Overheating ........................................ 548
Engine compartment cover ...............451
Engine coolant....................................... 455 Capacity ................................................ 558
Checking............................................... 455
Preparing and checking before winter ................................... 366
Engine immobilizer system ................. 66
Engine oil ................................................. 453 Capacity ................................................ 556
Checking................................................453
Preparing and checking before winter ................................... 366
Engine switch ............................................ 181
Engine switch light ............................... 392
EDR .................................................................10 Flat tire .......................................................527
Floor mats.................................................... 24
Fluid
Automatic transmission ................. 560
Brake..........................................................561
Steering .................................................. 562
Washer ................................................... 463
Fog lights.................................................. 200 Switch ................................................. 200
Wattage .................................................563
Four-wheel drive system................... 332
Front passenger occupant classification system ............................45
Front passenger’s seat belt reminder light ..................................... 509
Front position lights ............................... 192 Light switch............................................. 192
Wattage .................................................563
Front seats .................................................. 115 Adjustment............................................... 115
Cleaning................................................. 437
Correct driving posture .................... 26
Driving position memory.................128
Head restraints ..................................... 132
Seat heaters ..........................................390
Seat position memory .......................128
Front turn signal lights ..........................190 Replacing light bulbs .......................490
Turn signal lever .................................. 190
Wattage .................................................563F
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.