2013 Lexus GX460 suspension

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2
When driving
GX460_OM_OM60J63U_(U)■
Height modes
●N mode (normal mode): For ordinary driving
Normal height
● HI mode (high mode): For driving on bumpy roads
1.6 in. (40 mm) higher than the normal rear height
HI mode cannot be selected when vehicle speed exceeds 18 mph
(30 km/h).
● LO mode (low mode): For the ea se of egress/ingress and loading
luggage
0.8 in. (20 mm) lower than the normal rear height
LO mode cannot be selected wh en vehicle speed exceeds 7 mph
(12 km/h).
Disabling the height control
When the height control OFF
switch is pressed with the vehicle
stopped, the vehicle height is fixed
at the current height.
This status is memorized in the sys-
tem even after the engine is
stopped.
The height can be adjusted by
pressing the height control OFF
switch again.
When vehicle speed exceeds
18 mph (30 km/h), the rear height
control air suspension turns on
automatically.

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2-4. Using other driving systems
GX460_OM_OM60J63U_(U)
■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 under 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 under 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 the 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.

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2-4. Using other driving systems
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When driving
GX460_OM_OM60J63U_(U)
■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 auto-
matically selected. However, the system may not switch to N mode depending
on the location of the malfunction.
●The warning message is displayed on the multi-information display, and the rear
height control air suspension cannot be activated until the malfunction is cor-
rected.
Stop the engine and start it again. If th e warning message turns off, the system is
operating correctly. If the warning me ssage continues to be displayed, have
your vehicle inspected by your Le xus dealer as soon as possible.
CAUTION
■The rear height control air suspension must be turned off
Be sure to observe the following precau tions. Otherwise, the automatic leveling
function may cause vehicle height to change, and 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 flat bed truck, turn off the rear height control air sus-
pension and stop the engine.
●When the vehicle must be towed or disconnecting a trailer, put the vehicle height
in N mode and turn off the rear height control air suspension.
●When the vehicle is stuck, turn off th e rear height control air suspension.

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When driving
GX460_OM_OM60J63U_(U)
AVS (Adaptive Variable Suspension System)
: If equipped
■Driving mode
●Mode is suitable for heavy load or driving on a unpaved road.
●With the four-wheel drive control switch at L4, the damping effect suitable for
off-road driving will be provided, regard less of the position of the AVS switch.
AVS controls the suspension according to the road and driving conditions.
Selecting an optimum driving mode allows good riding comfort and stabil-
ity.
Sport mode
For winding mountain road driv-
ing or high speed driving
Normal mode
For normal driving
Comfort mode
For bumpy road driving

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2-4. Using other driving systems
GX460_OM_OM60J63U_(U)
■TRAC (Traction Control) for H4 mode
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
■Active TRAC (Traction Control) for L4 mode*
Helps to maintain drive power and prevent the 4 wheels from spinning
when starting the vehicle or accelerating on slippery roads, or in off-road
conditions
■Hill-start assist control
Helps to prevent the vehicle from rolling backward when starting on an
incline or slippery slope
■KDSS (Kinetic Dynamic Suspension System)
KDSS helps to enhance ride comfort and handling response by using a
hydraulic control system to contro l the suspension stabilizer bars in
response to road surface and driving conditions during cornering or off-
road driving
■ PCS (Pre-Collision System) (if equipped)
 P. 3 4 7
*: The function only works in vehicles with Multi-terrain Select when Multi-
terrain Select is switched on

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CAUTION
■Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause the system to malfunction.

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GX460_OM_OM60J63U_(U)
Disabling pre-collision brakingPre-collision braking disabled
Pre-collision braking enabled
The “PCS” warning light turns on
when pre-
collision braking is dis-
abled.
■ AVS (Adaptive Variable Suspension System) control (if equipped)
When the system determines that ther e is a high possibility of a fron-
tal collision, the AVS optimizes the damping effect ( P. 325)
■ Driver monitor system (if equipped)
When the system determines that there is a possibility of a frontal
collision, and the driver is not f acing forward, PCS warnings are
given in advance to warn the driver . If the driver continues to be not
facing forward, and a high possibilit y of a frontal collision is detected,
PCS informs the driver of high po ssibility of a frontal collision by
performing slight braking to provid e a physically warning (pre-colli-
sion alert braking). ( P. 3 4 9 )

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GX460_OM_OM60J63U_(U)
■The pre-collision system is operational when
●Pre-collision seat belts (situation 1):
• Vehicle speed is greater than about 4 mph (5 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehiclerunning ahead of you is greater than about 19 mph (30 km/h).
• The front occupants are wearing a seat belt.
●Pre-collision seat belts (situation 2):
• Vehicle speed greater than about 19 mph (30 km/h).
• The system detects sudd en braking or skidding.
• The front occupants are wearing a seat belt.
●Pre-collision brake assist:
• Vehicle speed is greater than about 19 mph (30 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 19 mph (30 km/h).
• The brake pedal is depressed.
●Pre-collision braking:
• The pre-collision braking off switch is not pressed.
• Vehicle speed is greater than about 10 mph (15 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle
running ahead of you is greater than about 10 mph (15 km/h).
●AVS (Adaptive Variable Suspension System) control (if equipped):
• Vehicle speed is greater than about 4 mph (5 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehiclerunning ahead of you is greater than about 19 mph (30 km/h).