2020 Lexus GX460 heating

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GX460_OM_OM60R27U_(U)2. Instrument cluster
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument cluster brightness adjustment
The instrument cluster brig
htness 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. Ho wever, 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.
■Customization
The meter display can be customized on the multi-information display. (P. 576)
WARNING
■The information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal information
display. At extremely low temperatures, th e information display monitor may respond
slowly, and display changes may be delayed.
For example, there is a lag between the dr iver’s shifting and the new gear number
appearing on the display. This lag could ca use the driver to downshift again, causing
rapid and excessive engine braking and possibly an accident resulting in death or
injury.
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. 546)

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GX460_OM_OM60R27U_(U)4-1. Before driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When taking a nap in the vehicle
Always turn the engine off. Otherwise,
if you accidentally move the shift lever or
depress the accelerator pedal, this could cause an accident or fire due to engine over-
heating. Additionally, if the ve hicle is parked in a poorly ventilated area, exhaust gases
may collect and enter the vehicle, leading to death or a serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side of
the vehicle to brake differently than the other side. Also, the parking brake may not
securely hold the vehicle.
●If the brake booster device does not operate, do not follow other vehicles closely and
avoid hills or sharp turns that require braking. In this case, braking is still possible, but
the brake pedal should be depressed more firmly than usual. Also, the braking dis-
tance will increase. Have your brakes fixed immediately.
●Do not pump the brake pedal if the engine stalls.
Each push on the brake pedal uses up the reserve for the power-assisted brakes.
●The brake system consists of 2 individual hy draulic systems: If one of the systems fails,
the other will still operate. In this case, the brake pedal should be depressed more
firmly than usual and the bra king distance will increase.
Have your brakes fixed immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessive ly when any of the tires is up in the air, or the vehicle is
stuck in sand, mud, etc. This may damage the driveline components or propel the vehi-
cle forward or backward, causing an accident.

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GX460_OM_OM60R27U_(U)4-1. Before driving
●Avoid jerky starts or sudden acceleration.
●Avoid jerky steering and sharp turns, an
d 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. Compensate 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 fo rget the length of your trailer, and be
sure you have plenty of room before changing lanes.
●To maintain engine braking efficien cy 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 st eep 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 conditioning (if in use), pull your vehicle off the road and
stop in a safe spot. ( P. 546)

GX460_OM_OM60R27U_(U)
1994-2. Driving procedures
4
Driving
■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 re peatedly in a short 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 in dicator flashes in amber
The system may be malfunctioning. Have th e vehicle inspected by your Lexus dealer,
immediately.
■If the electronic key battery is depleted
 P. 484
■Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine switch mode may not change
or the engine may not start.
●If attempting to restart the engine immediately after turning the engine switch off, the
engine may not start in some cases. After turning the engine switch off, please wait a
few seconds before restarting the engine.
■Automatic engine shut off feature
●The vehicle is equipped with a feature that automatically shuts off the engine when the
shift lever is in P with the engine running for an extended period.
●The engine will automatically shut off after ap proximately 1 hour if it has been left run-
ning while the shift lever is in P.
●The timer for the automatic engine shut off feature will reset if the brake pedal is
depressed or if the sh ift lever is in a position other than P.
●After the vehicle is parked, if the door is locked with the door lock switch (P. 106)
from the inside or the mechanical key ( P. 540) from the outside, the automatic
engine shut off feature will be disabled. The timer for the automatic engine shut off fea-
ture will be re-enabled if the driver’s door is opened.
■If the smart access system with push-button start has been deactivated in a customized
setting
 P. 540
“PUSH THE ENGINE SWITCH WHILE
TURNING THE STEERING WHEEL IN
EITHER DIRECTION”/“Push the engine switch
while turning the steering wheel in either direc-
tion” will be displayed on the multi-information
display.
Check that the shift lever is set in P. Press the
engine switch shortly and firmly while turning
the steering wheel left and right.

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GX460_OM_OM60R27U_(U)5-1. Using the air conditio
ning system and defogger
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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 heaters heat the side grips of the steering
wheel and seats. Seat ventilators maintain good airflow by blowing air from
the seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel and 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 pr event 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 unev en surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat.
●To prevent battery discharge, do not us e the functions when the engine is off.
Heated steering wheel (if equipped)

3905-1. Using the air conditioning system and defogger
GX460_OM_OM60R27U_(U)
●The heated steering wheel can be used when the engine switch is in IGNITION ON
mode.
●The heated steering wheel will automati cally turn off after about 30 minutes.
●If the indicator light flashes, press the switch to turn the heated steering wheel off and
then press the switch again. If the indica tor light still flashes, a malfunction may be
occurring. Turn the heated steering wheel off and have the vehicle inspected by your
Lexus dealer.
■Front seat
Turns the seat heater on
The indicator light comes on.
The higher the number of dots, the
warmer the seat becomes.
■Rear seat (if equipped)
For left second seat
For right second seat
High heating temperature
Low heating temperature
To turn on the seat heater, press “HI”
or “LO”.
The indicator light on “HI” or “LO”
switch indicates that the seat heater
is on.
Off
To turn off, press “OFF”.
The seat heaters can be used when the engine switch is in IGNITION ON mode.
Seat heaters (if equipped)
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GX460_OM_OM60R27U_(U)
4155-4. Using the other interior features
5
Interior features
WARNING
■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 manufa cturers’ 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 driving, or hamper safe driving.
●Result in a fire or burn injuries due to the 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 fitting plugs into the power outlet.
NOTICE
■To avoid damaging the power ou tlet 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)

546
GX460_OM_OM60R27U_(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 suff iciently, 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. 88) enters the
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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