2016 Lexus GX460 overheating

GX460_OM_OM60M73U_(U)
812. 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 8 6 )
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 5 6 )

GX460_OM_OM60M73U_(U)
1774-1. 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 5 6 )

188
GX460_OM_OM60M73U_(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 8 4
■If the smart access system with push-butto n start has been deactivated in a customized
setting
 P. 5 5 0
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. 5 0 3 )
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.

393
GX460_OM_OM60M73U_(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 (sleeping 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_OM60M73U_(U)
4195-4. 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.
NOTICE
■To avoid damaging the power outlet and the plug (120 V AC)
●Close the power outlet lid when not in use.
●Do not allow foreign objects or liquids to enter the power outlet, as this may cause a
short circuit.
●Do not use plug adaptors to connect too many plugs to the power outlet. (120 V AC)
●After removing a plug, gently close the power outlet lid. (120 V AC)

556
GX460_OM_OM60M73U_(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 9 ) 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
1
2
3
1
2

620Alphabetical index
GX460_OM_OM60M73U_(U)
Condenser ................................................461
Console box ...........................................400
Cool box ....................................................413
Cooling system ..................................... 459Engine overheating.......................... 556
Conversation mirror .............................416
Crawl Control ....................................... 340
Cruise control Cruise control....................................... 218
Dynamic radar cruise control........221
Cup holders ............................................ 402
Curtain shield airbags ........................... 34
Current fuel consumption ................... 83
Customizable features ....................... 586
DAC (Downhill Assist Control system)................................................... 343
Daytime running light system ........... 198
Defogger Front windshield ................................ 384
Outside rear view mirrors ............ 385
Rear window ....................................... 385
Differential ............................................... 567
Dimension ............................................... 562
Display Multi-information display .................. 82
Trip information .....................................83
Warning message ............................ 520
Do-it-yourself maintenance ...............451
Doors ............................................................ 94 Back door ............................................. 101
Door glasses ......................................... 146
Door lock .................................................. 94
Open door warning light................ 514
Outside rear view mirrors .............. 143
Rear door child-protector................ 97 Driver’s seat position memory........... 131
Driving ........................................................ 154
AVS switch ........................................... 335
Break-in tips .......................................... 155
Correct posture .................................... 26
Procedures .............................................154
Winter drive tips .................................. 371
Dynamic radar cruise control ........... 221
Eco Driving Indicator ............................ 86
EDR (Event data recorder)................... 10
Electronic key ........................................... 90 Battery-saving function ......................113
If the electronic key does not operate properly ........................... 550
Replacing the battery ...................... 484
Emergency, in case of If the electronic key does not operate properly ........................... 550
If the engine will not start ............... 547
If the shift lever cannot be shifted from P ................................... 549
If the vehicle has discharged battery ........................553
If the warning buzzer sounds ................................................... 512
If the warning light turns on ............512
If you have a flat tire .......................... 534
If you lose your keys...........................614
If you think something is wrong.................................................... 510
If your vehicle becomes stuck......................................................559
If your vehicle needs to be towed ...................................................504
If your vehicle overheats ................556
D
E

621Alphabetical index
GX460_OM_OM60M73U_(U)
Emergency flashers ............................. 502
EngineAccessory mode................................. 186
Compartment ..................................... 455
Hood ........................................................454
How to start the engine ................... 185
Identification number ...................... 564
If the engine will not start................ 547
Ignition switch (engine switch)..... 185
Overheating ........................................ 556
Engine compartment cover ............. 456
Engine coolant....................................... 459 Capacity ................................................ 566
Checking............................................... 459
Preparing and checking before winter ......................................371
Engine immobilizer system ................. 68
Engine oil ................................................. 457 Capacity ................................................ 564
Checking................................................457
Preparing and checking before winter ......................................371
Engine switch .......................................... 185
Engine switch light ............................... 396
Event data recorder (EDR) ...................10 Flat tire ...................................................... 534
Floor mats.................................................... 24
Fluid
Automatic transmission ................. 568
Brake........................................................569
Steering .................................................. 570
Washer ................................................... 467
Fog lights.................................................. 204 Switch ................................................. 204
Four-wheel drive system................... 336
Front passenger occupant classification system ............................46
Front passenger’s seat belt reminder light ....................................... 514
Front seats .................................................. 118 Adjustment............................................... 118
Cleaning................................................... 441
Correct driving posture .................... 26
Driving position memory...................131
Head restraints .....................................136
Seat heaters .......................................... 394
Seat position memory .........................131
Front turn signal lights .......................... 194 Replacing light bulbs ....................... 495
Turn signal lever ...................................194
Wattage ................................................... 571F