wheel LEXUS LX570 2018 Workshop Manual

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
◆ Vehicle sway warning
When the vehicle is swaying or
appears as if it may depart from its
lane multiple times, the warning
buzzer sounds and a message is dis-
played on the multi-information dis-
play to alert the driver.
WARNING ■
Before using LDA system
Do not rely solely upon the LDA system. The LDA system does not automatically drive
the vehicle or reduce the amount of attention that must be paid to the area in front of
the vehicle. The driver must always assume full responsibility for driving safely by pay-
ing careful attention to the surrounding cond itions and operating the steering wheel to
correct the path of the vehicle. Also, the driver must take adequate breaks when
fatigued, such as from driving for a long period of time.
Failure to perform appropriate driving operat ions and pay careful attention may lead to
an accident, resulting in death or serious injury. ■
To avoid operating LDA system by mistake
When not using the LDA system, use the LDA switch to turn the system off.

LX570_OM_OM60Q78U_(U) 2654-5. Using the driving support systems
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Driving ■
Operation conditions of each function ●
Lane departure alert function
This function operates when all of the following conditions are met.
• LDA is turned on.
• Vehicle speed is approximatel y 32 mph (50 km/h) or more.
• System recognizes white (yellow) lines.
• Width of traffic lane is approx imately 9.8 ft. (3 m) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a stra ight road or around a gentle curve with a radius of more
than approximately 492 ft. (150 m).
• No system malfunctions are detected. ( → P. 267)●
Vehicle sway warning
This function operates when all of the following conditions are met.
• Setting for “Sway Warning” in (Setting s display) of the multi-information dis-
play is set to “On”. ( → P. 580)
• Vehicle speed is approximatel y 32 mph (50 km/h) or more.
• Width of traffic lane is approx imately 9.8 ft. (3 m) or more.
• No system malfunctions are detected. ( → P. 267)■
Temporary cancelation of functions
When operation conditions are no longer met, a function may be temporarily canceled.
However, when the operation co nditions are met again, operat ion of the function is auto-
matically restored. ( → P. 265)■
Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio playback, etc.
Also, it may be difficult to f eel steering wheel vibrations due to the road conditions, etc.■
White (yellow) lines are only on one side of road
The LDA system will not operate for the side on which white (yellow) lines could not be
recognized.

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
■
Conditions under which the ve hicle-to-vehicle distance co ntrol mode may not function
correctly
In the case of the following conditions, o perate the brake pedal (or accelerator pedal,
depending on the situ ation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system may not
operate properly.
●
When the vehicle ahead of you decelerates suddenly ●
When your vehicle is pointing upwards
(caused by a heavy load in the luggage com-
partment, etc.) ●
Preceding vehicle has an extremely high
ground clearance
●
When the road curves or when the lanes are
narrow
●
When steering wheel operation or your posi-
tion in the lane is unstable

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
4
Driving
4-Wheel AHC (Active Heigh t Control Suspension)Easy access mode switch
Height control OFF switch
Height select switch
Higher
LowerThe 4-Wheel AHC adjusts the vehicle height in accordance with driving con-
ditions. There are 3 selectable modes, “HI” (high), “N” (normal), and “LO”
(low). 1
2
3
Selecting vehicle height 1
2

LX570_OM_OM60Q78U_(U) 2974-5. Using the driving support systems
4
Driving 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 vehi cle 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 Yes Yes
7 mph (12 km/h) to
18 mph (30 km/h) No Yes Yes
18 mph (30 km/h) or over No Yes No
Easy access mode

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
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 lowe red, 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 contro l 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 mo de 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 heig ht 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

LX570_OM_OM60Q78U_(U) 2994-5. Using the driving support systems
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Driving ■
Extra high mode
If the vehicle becomes stuck or the Crawl Co ntrol 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. (2 0 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 contro l 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 co ntrol “OFF” switch is pushed again, even if
the engine switch is turned off. ●
Even if the system is turned off, the system will interven e 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 stil l 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 func tion 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 heig ht cannot be raised/lowered.

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems■
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 caus e the suspension to fully elongate.●
If the steering wheel is abrupt ly 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 sh ort 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 en gine after off-road driving, the vehicle height may gradu-
ally lower. When parking, ma ke sure there is nothing un der the vehicle that may come
in contact with the underbody. The vehicle will return to th e 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 norm al mode depending on the location of the
malfunction.
The warning message is displa yed on the multi-informatio n display, and the 4-Wheel
AHC cannot be activated until the malfunction is corrected.
Stop the engine and start it again. If the wa rning message turns off, the system is operat-
ing correctly. If the warning me ssage continues to be displayed, have the vehicle checked
at your Lexus dealer as soon as possible.

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
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Driving
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 1
2

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LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
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 fr eed, 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 sp eed 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 sp eed 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 co ntrolled effectively by the Ac tive TRAC, which assists the
driver to control the driving power of 4 wheels. ●
Use the 1 range of S or D (vehicles with pa ddle 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 1
2
3
1
2
3