wheel LEXUS LX570 2016 Workshop Manual

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LX570_OM_OM60N01U_(U)4-5. Using the driving support systems
■Conditions under which the vehicle-to-vehicle distance co
ntrol mode may not function
correctly
In the case of the following conditions, op erate 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 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_OM60N01U_(U)4-5. Using the driving support systems
4
Driving
4-Wheel AHC (Active Height Control Suspension)
Easy access mode switch
Height control OFF switch
Height select switch
Higher
Lower
The 4-Wheel AHC adjusts the vehicle heig
ht 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_OM60N01U_(U)
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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 to OFF
within 30 seconds after the vehicle
stops while this 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 sur-
rounding people that the vehicle is low-
ering.
The indicator light stops blin king, 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 door and the back door are not opened, with the vehicle stopped and
the engine switch is turned to off.
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 modeNormal modeHigh mode
Under 7 mph (12 km/h)Ye sYe sYe s
7 mph (12 km/h) to
18 mph (30 km/h)NoYe sYe s
18 mph (30 km/h) or overNoYe sNo
Easy access mode

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LX570_OM_OM60N01U_(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 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 sw itch being turned OFF, the vehicle height
may be lowered by the auto leveling function.
●Operating the height select switch will have no effect while th e 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

LX570_OM_OM60N01U_(U)
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4
Driving
■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.
■Tu r n i n g o f f t h e h e i g h t c o n t r o l
●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 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 st ill 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 height cannot be raised/lowered.

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LX570_OM_OM60N01U_(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 cause
the suspension to fully elongate.
●If the steering wheel is abruptly turned more than 3/4 of a revolution with the center
differential 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, th e 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 oper ating. 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 ther e 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. Th is 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 displayed on the mu lti-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 continue s to be displayed, have the vehicle checked
at your Lexus dealer as soon as possible.

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LX570_OM_OM60N01U_(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_OM60N01U_(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 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 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 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 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
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2
3

LX570_OM_OM60N01U_(U)
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Driving
■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 di fferential 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 lig ht 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 sp eed four-wheel drive indicator turns on/off,
the transfer mode may not be shifted comp letely. 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 attempti ng 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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LX570_OM_OM60N01U_(U)4-5. Using the driving support systems
WA R N I N G
■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 sp eed 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/u nlock switch when the vehicle is turning or
when its wheels are spinning freely off the ground.