2021 Lexus GX460 vehicle height control

GX460_OM_OM60T19U_(U)
3414-5. Using the driving support systems
4
Driving
■When HI mode is selected
The vehicle height will change to N mode when driving at the speeds of 18 mph (30 km/h).
Even if vehicle speed is then reduced to un der 18 mph (30 km/h), height will not return to
HI mode.
■When LO mode is selected
The vehicle height will change to N mode when vehicle speed exceeds 7 mph (12 km/h).
Even if vehicle speed is then reduced to un der 7 mph (12 km/h), height will not return to
LO mode.
■Automatic leveling function
Regardless of the number of occupants and the luggage load, vehicle height in any mode
is always adjusted to a fixed height by the automatic leveling function.
■The rear height control air suspension will not operate in the following cases:
●The underbody of the vehicle is touching the surface of the road.
●The area around the suspension is covered with ice.
■Even if you hear an operating noise
This does not indicate a problem in th e rear height control air suspension.
■Parking and stopping tips
●If you immediately stop the engine after off- road driving, or park the vehicle for a long
time, the vehicle height may gradually lower. When parking, make sure there is nothing
under the vehicle that may come in contact with the underbody. The vehicle will return
to the set height when the engine is started.
●The vehicle height may change as the temperature changes when the engine is
stopped. The vehicle will return to the set height when the engine is started.
■When lowering the vehicle
In order to prevent the vehicle height from rising as occupants leave the vehicle, lowering
control will occur for a short while after the engine has been stopped.
■The rear height control air suspension failure warning
●If a malfunction occurs in the rear height control air suspension, N mode is automati-
cally selected. However, the system may not switch to N mode depending on the loca-
tion of the malfunction.
●The “CHECK AIR SUSPENSION SYSTEM”/“C heck air suspension system” is dis-
played on the multi-information display, and the rear height control air suspension can-
not be activated until the malfunction is corrected.
Stop the engine and start it again. If the warning message turns off, the system is operat-
ing correctly. If the warning message continues to be displayed, have your vehicle
inspected by your Lexus dealer as soon as possible.

342
GX460_OM_OM60T19U_(U)4-5. Using the driving support systems
WARNING
■The rear height control air suspension must be turned off
Be sure to observe the following precautions. Otherwise, the automatic leveling func-
tion may cause vehicle height to change, an
d you may catch part of your body in the
vehicle, resulting in an accident:
●When jacking up the vehicle, installing tire chains or tying the vehicle with chains/
wires for transportation via flatbed truck, tu rn off the rear height control air suspen-
sion and stop the engine.
●When the vehicle must be towed or disconnect ing a trailer, put the vehicle height in N
mode and turn off the rear he ight control air suspension.
●When the vehicle is stuck, turn off the rear height control air suspension.
■Selecting the correct height mode
●HI mode should only be used when drivin g on rough roads, for example when driving
off-road.
Because the vehicle’s center of gravity will become higher when in the mode, the
vehicle may become unstable when turnin g abruptly, resulting in an accident.
●Do not select HI mode when loading cargo on the roof luggage carrier.
Because the vehicle’s center of gravity will become higher when in the mode, the
vehicle may become unstable when turnin g abruptly, resulting in an accident.
●Before lowering vehicle height, check that there is no one under the vehicle.
NOTICE
■Be careful in any place where overhead space is limited
The vehicle height will rise when a higher mode is selected or cargo is unloaded. This
may cause damage to the vehicle.
■Do not select LO mode when driving on bumpy roads
If the underbody of the vehicle touches a rugged road surface, the vehicle may be
damaged.
■Changing vehicle height
Do not change vehicle height frequently.
The compressor may overheat and stop operation.
■When on the extremely uneven roads with rocks
Sometimes the vehicle height is not adjusted because it is judged as uneven road driv-
ing.

358
GX460_OM_OM60T19U_(U)4-5. Using the driving support systems
■Sounds and vibrations caused by the ABS/Mu
lti Terrain ABS, brake assist, VSC, Trailer
Sway Control, TRAC/Active TRAC and hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slightly afte r the ABS/Multi Terrain ABS is activated.
• The brake pedal may move down slightly after the ABS/Multi Terrain ABS is acti-
vated.
■Automatic reactivation of TRAC/Active TR AC, Trailer Sway Control and VSC systems
After turning the TRAC/Activ e TRAC, Trailer Sway Control and VSC systems off, the
systems will be automatically re-ena bled in the following situations:
●When the engine switch is turned off
●If only the TRAC/Active TRAC system is turned off, the TRAC/Active TRAC will turn
on when vehicle speed increases
If both the TRAC/Active TRAC and VSC syst ems are turned off, automatic re-enabling
will not occur when vehicle speed increases.
■When the brake system operates continuously
The brake actuator may overheat. In this case, the TRAC/Active TRAC and hill-start
assist control systems will stop operating, a buzzer will sound and the “TRAC OFF” indi-
cator will come on. Refrain from using the system until the message goes off. (There is no
problem with continuing normal driving.)
■If the slip indicator comes on...
It may indicate a malfunction in the TRAC /Active TRAC, VSC/Trailer Sway Control or
hill-start assist control system. Consult your Lexus dealer.
■KDSS
Some difference of vehicle height between left and right side can appear. This does not
indicate a malfunction in the KDSS system. For more information, contact your Lexus
dealer.

442
GX460_OM_OM60T19U_(U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior
●Working from top to bott
om, liberally apply water to the vehicle body, wheel
wells and underside of the vehicl e to remove any dirt and dust.
●Wash the vehicle body using a sponge or soft cloth, such as a chamois.
●For hard-to-remove marks, use car wa sh soap and rinse thoroughly with
water.
●Wipe away any water.
●Wax the vehicle when the waterproof coating deteriorates.
If water does not bead on a clean surface, apply wax when the vehicle body is cool.
■Automatic car washes
●Fold the mirrors back before washing the ve hicle. Start washing from the front of the
vehicle. Make sure to extend the mirrors before driving.
●Brushes used in automatic car washes may scratch the vehicle surface, parts (wheel,
etc.) and harm your vehicle’s paint.
■High pressure car washes
●As water may enter the cabin, do not bring the nozzle tip near the gaps around the
doors or perimeter of the windows, or spray these areas continuously.
●For vehicles with rear height control air suspension, do not bring the nozzle tip near the
rear air suspension unit.
■Wheels and wheel ornaments
●Remove any dirt immediately by using a neutral detergent.
●Wash detergent off with water immediately after use.
●To protect the paint from damage, make sure to observe the following precautions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driving or park- ing in hot weather
■Bumpers and side moldings
Do not scrub with abrasive cleaners.
Perform the following to protect the ve hicle and maintain it in prime condi-
tion:

5137-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
Securely attach cables or chains to
the towing hooks.
Take care not to damage the vehicle
body.
Enter the vehicle being towed and start the engine.
If the engine does not start, turn th e engine switch to IGNITION ON mode.
Set the four-wheel drive control switch in H4 and push the center differential
lock/unlock switch to unlock the center differential. (P. 344)
For models with the rear height cont rol air suspension: Change the vehicle
height to N (normal) mode and end th e vehicle height control operation.
( P. 339)
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: P. 209
■While towing
If the engine is not running, the power assist for the brakes and steering will not function,
making steering and br aking more difficult.
Emergency towing procedure
1
2
3
4
5

5147-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■While towing
●When towing using cables or chains, avoid sudden starts, etc. which place excessive
stress on the towing eyelets, cables or chains. The towing eyelets, cables or chains
may become damaged, broken debris ma y hit people, and cause serious damage.
●For models with the rear height control air suspension: Make sure to disable all func-
tions of the vehicle height control of the rear height control air suspension. Other-
wise, the vehicle height may change and part of your body may be caught under the
vehicle, possibly causing injury. ( P. 339)
●Do not turn the engine switch off.
There is a possibility that the steering wheel is locked and cannot be operated.
Be sure to transport the vehicle with all four
wheels raised off the ground. If the vehicle is
towed with the tires contacting the ground, the
drivetrain or related parts may be damaged,
the vehicle may fly off the truck.

531
GX460_OM_OM60T19U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If you have a flat tire
●Stop the vehicle in a safe place on a hard, flat surface.
●Set the parking brake.
●Shift the shift lever to P.
●Turn off the rear height control air suspension (if equipped). (P. 339)
●Stop the engine.
●Turn on the emergency flashers. ( P. 508)
Your vehicle is equipped with a spare tire. The flat tire can be replaced with
the spare tire.
For details about tires:  P. 472
WARNING
■If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat ti re can damage the tire and the wheel beyond
repair, which could re sult in an accident.
Before jacking up the vehicle

5337-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
WARNING
■Using the tire jack
Improper use of the tire jack may cause the ve hicle to suddenly fall off the jack, leading
to death or serious injury.
●Do not use the tire jack for any purpose ot her than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do no t use other tire jacks for replacing tires on
this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not put any part of your body under the vehicle while it is supported by the jack.
●Do not start or run the engine while your vehicle is supported by the jack.
●Do not raise the vehicle while someone is inside.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●Vehicles with rear height control air suspensi on: Be sure to turn off the height control
and stop the engine.
Take particular care when lowering the ve hicle to ensure that no one working on or
near the vehicle will be injured.
■Using the jack handle
Tighten all the jack handle bo lts securely using a Phillips-head screwdriver, to prevent
the extension parts from co ming apart unexpectedly.