Lexus LX570 (2021 year). Manual in english - page 18

304

Some modes may not be selectable depending on the vehicle speed when the
four-wheel drive control switch is in the H4 position. Refer to the following table.

You can select this mode for easy
access and easy loading of the vehicle.

If the engine switch is turned off within

approximately 30 seconds after the

vehicle is stopped while easy access

mode is on, the vehicle height is lowered

automatically.
When the vehicle begins to lower a

beep will sound twice, and while the

vehicle is lowering the indicator light will

flash to alert the driver and surrounding

people that the vehicle is lowering.
The indicator light stops blinking, and comes on continuously to indicate that the shift

is completed.

Easy access mode is available if the following conditions have been met:

●

The vehicle height mode is in normal mode.

●

The vehicle is stopped on a flat surface.

●

The shift lever is in P.

●

The side doors and back door are not opened after the vehicle is stopped.

The following method will cancel the vehicle lowering operation and raise the
vehicle again:

●

Press the height control OFF switch.

●

Push the height select switch to “



”.

Conditions for changing the vehicle height mode

Low mode

Normal mode

High mode

Under 7 mph (12 km/h)

Yes

7 mph (12 km/h) to

18 mph (30 km/h)

Yes

18 mph (30 km/h) or over

Yes

Easy access mode

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4-5. Using the driving support systems

iving

When the height control OFF switch is
pressed with the vehicle stopped.

The height control “OFF” indicator will

appear on the multi-information display,

and the vehicle height will be fixed in the

current mode. Push the switch again to

turn the system back on.

■

Operating conditions

●

The engine must be running.

●

Vehicle height control must be turned off.

●

All side doors and the back door must be closed.

■

Switching vehicle height mode while the engine is stopped

●

If the engine is stopped while the vehicle height is being lowered, lowering will continue.

●

If any luggage is removed from the vehicle or if any occupants leave the vehicle within

approximately 30 seconds of the engine switch being turned off, the vehicle height may

be lowered by the auto leveling function.

●

Operating the height select switch will have no effect while the engine is stopped.

■

Automatic change in vehicle height when the four-wheel drive control switch is in the

L4 position

If the vehicle speed exceeds 2 mph (3 km/h) while driving on an uneven road with the

four-wheel drive control switch in the “L4” position, high mode is automatically selected.

(On even roads, the height mode will not change.)

■

Automatic change in vehicle height when in the high mode

●

If the vehicle speed exceeds 18 mph (30 km/h) with the four-wheel drive control switch

in the “H4” position, normal mode is automatically selected.

●

If the vehicle speed exceeds 30 mph (50 km/h) with the four-wheel drive control

switch in the “L4” position, the vehicle height is lowered to 1.0 in. (25 mm) higher than

the normal mode height. If the vehicle speed drops to 13 mph (20 km/h) or less, high

mode is automatically resumed.

Disabling the height control

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4-5. Using the driving support systems

■

Extra high mode

If the vehicle becomes stuck or the Crawl Control system requests the vehicle height be

raised, extra high mode may be automatically selected when the vehicle height is in high

mode with the four-wheel drive control switch in the L4 position.

The vehicle height is raised to 0.8 in. (20 mm) higher than the high mode height, or

slightly higher.

●

Extra high mode will change back to high mode when:
• The vehicle speed exceeds 6 mph (10 km/h)

• The four-wheel drive control switch is shifted to H4.

●

If you pull the height select switch to “



” when in extra high mode, normal mode is

selected.

●

Extra high mode cannot be manually selected.

■

Turning off the height control

●

The system will remain off until the height control “OFF” switch is pushed again, even if

the engine switch is turned off.

●

Even if the system is turned off, the system will intervene automatically if the vehicle

speed exceeds the following.
• 18 mph (30 km/h) with high or low mode

• 50 mph (80 km/h) with normal mode

■

Automatic leveling function

The vehicle is adjusted to a fixed height for each mode, regardless of the number of

occupants and the luggage load.

●

However the vehicle cannot be raised if the vehicle load exceeds the following limits:
• Up to 4 occupants

plus approximately 661 lb. (300 kg) in the normal mode

• Up to 4 occupants

plus approximately 441 lb. (200 kg) in the high mode

: average weight 150 lb. (68 kg) per person

●

If the vehicle height cannot be raised when in the normal mode, and “LO” appears on

the display, the vehicle is loaded too heavily. Take extra care when driving in this condi-

tion.

If the vehicle height cannot be raised even after unloading the vehicle, pull the height

select switch to “



” then push to “



”. If the vehicle height still cannot be raised, turn the

ignition off then on again, then try once more.

■

When the vehicle is stopped during driving

The activation of the automatic leveling function may cause the vehicle height to change.

This is not a malfunction.

■

If the vehicle height does not change

If the vehicle is loaded too heavily, or the undercarriage has come into contact with the

road surface, the vehicle height cannot be raised/lowered.

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4-5. Using the driving support systems

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■

In the following cases the 4-Wheel AHC will not operate

●

The brake pedal has been depressed for a few seconds or longer while the vehicle is

stopped.

●

Vehicle height control has not been frequently used.

●

The suspension fluid temperature is lower than -22°F (-30°C).

●

There is ice on the suspension.

●

Driving on bumpy roads which may cause the suspension to fully elongate.

●

If the steering wheel is abruptly turned more than 3/4 of a revolution with the center dif-

ferential lock system activated.

■

Cold weather operation

It may take longer for the vehicle height to change if the suspension fluid temperature

drops below 5°F (-15°C).
The 4-Wheel AHC does not operate when the suspension fluid temperature drops

below -22°F (-30°C).

●

In this case, even if the height select switch is pressed, the vehicle height will not change.

Once the vehicle has been driven for a short time and the suspension fluid has been

warmed to within normal operating limits, the 4-Wheel AHC will begin operating and

the vehicle height will automatically change to the selected mode.

●

When the suspension fluid is around -22°F (-30°C), the vehicle height may not be able

to be raised, even if the 4-Wheel AHC is operating. In this case, pull the height select

switch to “



” then push to “



” after driving for a short time longer to select the desired

vehicle height.

■

Parking and stopping tips

●

If you immediately stop the engine after off-road driving, the vehicle height may gradu-

ally 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.

■

Propeller shaft noise

If the vehicle height is adjusted on a slope, or with the shift lever in a position other than P

or N while the vehicle is stopped, you may hear a sound caused by the expansion and

contraction of the propeller shaft. This does not indicate a malfunction.

■

4-Wheel AHC failure warning

If a malfunction occurs in the 4-Wheel AHC, normal mode is automatically selected.

However, the system may not switch to normal mode depending on the location of the

malfunction.

The warning message is displayed on the multi-information display, and the 4-Wheel

AHC cannot 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 the vehicle checked

at your Lexus dealer as soon as possible.

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4-5. Using the driving support systems

WARNING

■

When switching the vehicle height mode

Before lowering the vehicle height, check that there are no people under or around the

vehicle, and check for obstacles.
If you do not do this, body parts may be caught in the vehicle, possibly leading to an

accident.

■

Using the high mode

The high mode should only be used when driving 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 turning abruptly, resulting in an acci-

dent.

■

When jacking up the vehicle or installing tire chains

Turn off the height control and stop the engine, otherwise the vehicle height may

change due to the automatic leveling function and you may catch part of your body in

the vehicle, resulting in an accident.

■

When crossing rivers

Select the high mode and turn off the height control. Drive at 18 mph (30 km/h) or

lower. Otherwise the vehicle height may change due to the automatic leveling function,

resulting in an accident.

■

If your vehicle must be towed

Put the vehicle height in the normal mode and turn off the height control, otherwise the

vehicle height may change due to the automatic leveling function and you may catch

part of your body in the vehicle, resulting in an accident.

■

If your vehicle becomes stuck in a ditch

Turn off the height control, otherwise the vehicle height may change due to the auto-

matic leveling function, resulting in an accident.

■

When loading cargo on the roof luggage carrier

Do not switch to high mode. Sudden steering could cause the vehicle to lose stability

due to the vehicle’s higher center of gravity, possibly leading to an accident.

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4-5. Using the driving support systems

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NOTICE

■

When parking in areas with limited overhead height

After leaving the vehicle or unloading the luggage, the vehicle height may be slightly

higher than normal. Take care when overhead height is limited.

■

To avoid damage to the vehicle

●

Normal mode will be switched to automatically even if the vehicle is started off in low

mode. Take care when overhead height is limited.

●

Do not select the low mode when driving on bumpy roads, as the underbody of the

vehicle may contact the road surface.

●

When traveling on bumpy roads or through water, or when towing, turn off easy

access mode.

■

Avoid rapid changes to the vehicle height

As the pump may overheat. Leave at a few seconds between selections when changing

the vehicle height mode.

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4-5. Using the driving support systems

Four-wheel drive system

H4 (high speed position)

Normal driving on all types of roads.

L4 (low speed position)

Driving requiring maximum power and

traction such as climbing or descending

steep hills, off-road driving, and hard

pulling in sand or mud, etc.
The low speed four-wheel drive indica-

tor will come on.

Use the four-wheel drive control switch and center differential lock/unlock
switch to select the following transfer and center differential modes.

Four-wheel drive control switch

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4-5. Using the driving support systems

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Lock the center differential when your
vehicle’s wheels get stuck in a ditch or
when driving on a slippery or bumpy
surface.

The center differential lock indicator will

come on.
Unlock the center differential after the

wheels have been freed, or after moving

to a flat, non-slippery surface.
To unlock the center differential, push the switch again.

■

Shifting from H4 to L4

Stop the vehicle completely with brake pedal held down.
Shift the shift lever to N.
Push and shift the four-wheel drive control switch to L4.

Maintain this condition until the low speed four-wheel drive indicator turns on.

■

Shifting from L4 to H4

Stop the vehicle completely with brake pedal held down.
Shift the shift lever to N.
Push and shift the four-wheel drive control switch to H4.

Maintain this condition until the low speed four-wheel drive indicator turns off.

■

The four-wheel drive control switch can be operated when

●

The engine switch is in IGNITION ON mode.

●

The shift lever is in the N position.

●

The vehicle is stopped completely.

■

The low speed four-wheel drive indicator light

The indicator light blinks while shifting between H4 and L4.

■

Advice for driving on slippery roads

●

If you shift the four-wheel drive control switch to L4 and the shift lever to the 2 range of

S or D (vehicles with paddle shift switches) while driving in steep off-road areas, the

output of the brake can be controlled effectively by the Active TRAC, which assists the

driver to control the driving power of 4 wheels.

●

Use the 1 range of S or D (vehicles with paddle shift switches) for maximum power and

traction when your wheels get stuck or when driving down a steep incline.

Center differential lock/unlock switch

Shifting between H4 and L4

2
3

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4-5. Using the driving support systems

■

The center differential lock indicator light

The indicator light blinks while locking/unlocking the center differential.

■

The center differential lock/unlock switch can be operated when

●

The engine switch is in IGNITION ON mode.

●

The vehicle speed is less than 62 mph (100 km/h).

■

Locking/unlocking the center differential

●

When the four-wheel drive control switch is in L4 with the center differential locked,

VSC is automatically turned off. (The center differential lock and VSC OFF indicator

lights come on.)

●

If the operation is not completed, the center differential lock indicator blinks. If the indi-

cator light does not turn off when unlocking the center differential, drive straight ahead

while accelerating or decelerating, or drive in reverse.

●

If the center differential lock/unlock is not completed within 5 seconds while the cruise

control system is on, cancel the cruise control system.

■

If the low speed four-wheel drive indicator light or the center differential lock indicator

light blinks

●

If the low speed four-wheel drive indicator light continues to blink when using the four-

wheel drive control switch, stop the vehicle completely, move the shift lever to N and

operate the switch again.

●

If the shift lever is moved before the low speed four-wheel drive indicator turns on/off,

the transfer mode may not be shifted completely. The transfer mode disengages both

the front and rear driveshafts from the powertrain and allows the vehicle to move

regardless of the shift position. (At this time, the indicator blinks and the buzzer sounds.)
Therefore, the vehicle is free to roll even if the automatic transmission is in P. You or

someone else could be seriously injured. You must complete the shifting of the transfer

mode.
To complete the shifting, stop the vehicle completely, return the shift lever to N, and

confirm that the shift was completed (the indicator turns on/off).

●

If the engine coolant temperature is too low, the four-wheel drive control system may

not be able to shift. When the engine is warmer operate the switch again.

If the low speed four-wheel drive indicator light or the center differential lock indicator

light continues to blink even after attempting the above, there may be a malfunction in

the engine, the brake system or the four-wheel drive system. In this case, you may not be

able to shift between H4 and L4, and the center differential lock may not be operable.

Have the vehicle inspected by your Lexus dealer immediately.

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4-5. Using the driving support systems

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WARNING

■

While driving

Never move the four-wheel drive control switch if the wheels have lost traction. Doing

so may cause an accident resulting in death or serious injury.

■

When the vehicle is parked

If the shift lever is moved before the low speed four-wheel drive indicator turns on/off,

the transfer mode may not be shifted completely. The transfer mode disengages both

the front and rear driveshafts from the powertrain and allows the vehicle to move

regardless of the shift position. (At this time, the indicator blinks and the buzzer

sounds.)
Therefore, the vehicle is free to roll even if the automatic transmission is in P. You or

someone else could be seriously injured. You must complete the shifting of the transfer

mode.

NOTICE

■

To prevent damage to the center differential

●

For normal driving on dry and hard surface roads, unlock the center differential.

●

Unlock the center differential after the wheels are out of the ditch or off the slippery

or bumpy surface.

●

Do not push the center differential lock/unlock switch when the vehicle is turning or

when its wheels are spinning freely off the ground.

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4-5. Using the driving support systems

Crawl Control (with Turn Assist function)

ON/OFF switch
Speed selection switch
Indicators

The Crawl Control indicator is lit and

the slip indicator flashes when operat-

ing.

Multi-information display

The operating status and speed select

status of the Crawl Control are shown

on the multi-information display.

Allows travel on extremely rough off-road surfaces at a fixed low speed with-
out pressing the accelerator or brake pedal. Minimizes loss of traction or
vehicle slip when driving on slippery road surfaces, allowing for stable driving.

Crawl Control switches

2
3

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4-5. Using the driving support systems

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The following table shows some typical
terrains and the recommended speed
modes.

This function assists cornering performance in accordance with steering opera-
tion when driving through a tight corner. It maintains vehicle speed while driving
and reduces the number of turns needed to navigate a corner that requires turn-
ing the wheel in the opposite direction.
Press the Turn Assist switch while
Crawl Control is operating.

Turn Assist indicator will come on.
To turn the system off, press the switch

again.

Speed modes

Mode

Road condition

Rock, mogul (downhill) and gravel (down-

hill)

Lo-Med

Mogul (uphill)

Med

Snow, mud, gravel (uphill), sand, dirt,

mogul (uphill) and grass

Med-Hi

Turn Assist function

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4-5. Using the driving support systems



Crawl Control

Press the ON/OFF switch while Crawl Control is operating. If the switch is
turned off, the slip indicator and the Turn Assist indicator will go off (if the Turn
Assist function is in use), the Crawl Control indicator will flash until the system
has turned off completely, and a message stating that Crawl Control has been
turned off will be displayed on the multi-information display for several seconds.
When turning off Crawl Control while driving, stop the vehicle before the Crawl
Control indicator turns off, or drive extremely carefully.



Turn Assist function

Press the Turn Assist switch while the Turn Assist function is operating. When the
switch is pressed, the Turn Assist indicator will go off, and a message stating that
the Turn Assist function has been turned off will be displayed on the multi-infor-
mation display for several seconds.

■

The Crawl Control and Turn Assist function can be operated when



Crawl Control

●

The engine is running.

●

The shift lever is in any gear other than P or N.

●

The four-wheel drive control switch is in L4.

●

The driver’s door is closed.



Turn Assist function

●

Crawl Control is operating.

●

The center differential is not locked.

●

The accelerator and brake are not being operated.

●

The shift lever is in any gear other than P, R or N.

●

The steering wheel is turned very far.

When the system is turned off

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■

Automatic system cancelation



Crawl Control

In the following situations, the buzzer will sound intermittently and Crawl Control will be

canceled automatically. In this event, the Crawl Control indicator will flash and then go

off, the Turn Assist indicator will go off (if the Turn Assist function is in use), and a message

stating that Crawl Control has been turned off will be displayed on the multi-information

display for several seconds.

●

When the shift lever is moved to P or N.

●

When the four-wheel drive control switch is in H4.

●

When the driver’s door is opened.



Turn Assist function

When the center differential is locked, the buzzer will sound intermittently and the Turn

Assist function will be canceled automatically. In this event, the Turn Assist indicator will

go off, and a message stating that the Turn Assist function has been turned off will be dis-

played on the multi-information display for several seconds.

■

Function limitations



Crawl Control

●

In the following situations, brake control can be used to drive downhill at a constant

speed. However, engine control is not available when driving uphill at a constant speed.
• When switched to second start mode.

●

In the following situation, engine control and brake control will stop temporarily. In this

event, the Crawl Control indicator will flash.
• When the vehicle speed exceeds approximately 15 mph (25 km/h).



Turn Assist function

In the following situations, the Turn Assist function will stop temporarily. In this event, the

Turn Assist indicator will flash.

●

When the vehicle speed exceeds approximately 6 mph (10 km/h).

●

When the shift lever is moved to R.

■

When the Crawl Control system is operated continuously

●

If Crawl Control is used continuously for a long time, the buzzer will sound, a malfunc-

tion notification will be displayed on the multi-information display, the Crawl Control

indicator will go off, and Crawl Control will be temporarily inoperable as a result of the

brake system overheating. In this event, stop the vehicle immediately in a safe place,

and allow the brake system to cool down sufficiently until the TRAC OFF indicator

goes off. (In the meantime, normal driving is possible.)

●

If Crawl Control is used continuously for a long time, the buzzer will sound, the system

will be temporarily canceled, and a malfunction notification will be displayed on the

multi-information display as a result of the automatic transmission system overheating.

Stop the vehicle in a safe place until the display goes off.

■

When depressing the accelerator pedal while the Crawl Control is operating

Multi-terrain Select operates in AUTO mode. (



P. 320)

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4-5. Using the driving support systems

■

Sounds and vibrations caused by the Crawl Control system

●

A sound may be heard from the engine compartment when the engine is started or just

after the vehicle begins to move. This sound does not indicate that a malfunction has

occurred in Crawl Control system.

●

Either of the following conditions may occur when the Crawl Control system is operat-

ing. None of these are indicators that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.

• A motor sound may be heard after the vehicle comes to a stop.

■

When there is a malfunction in the system

Warning lights and/or warning messages will turn on. (



P. 524, 532)

WARNING

■

When using Crawl Control and Turn Assist function

Do not rely solely on the Crawl Control and Turn Assist function. This function does not

extend the vehicle’s performance limitations. Always thoroughly check the road condi-

tions, and drive safely.

■

These conditions may cause the system not to operate properly

When driving on the following surfaces, the system may not be able to maintain a fixed

low speed, which may result in an accident:

●

Extremely steep inclines.

●

Extremely uneven surfaces.

●

Snow-covered roads, or other slippery surfaces.

NOTICE

■

When using Turn Assist function

The Turn Assist function is a function to assist turning performance when driving off

road. The function may be less effective on paved road surfaces.

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4-5. Using the driving support systems

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Multi-terrain Select



When the Crawl Control is turned off

Select a mode that most closely matches the type of terrain on which you are
driving from among 5 modes.
Brake control can be optimized in accordance with the selected mode.



When the Crawl Control is turned on

A mode which matches the road conditions is automatically selected by
depressing the accelerator pedal (AUTO mode).

Multi-terrain Select mode selector
switch
Multi-terrain Select indicator
Multi-information display
Displays status information including
operating status and road type
selection.

Multi-terrain Select is a system that helps drivability in off-road situations.

Multi-terrain Select switch/indicators

2
3

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