height LEXUS LX470 2007 User Guide

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2-4. Using other driving systems
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When driving
Vehicle height modesPress “ ▲” to step up one height mode, and “▼ ” to step down one height
mode. (Ex. When in the lo w height mode, press “▲” once to switch to the
normal height mode, and twice to sw itch to the high height mode.)
■ “HI” (high) height mode
Vehicle height is 1.6 in. (40 mm) higher at the front, and 2.0 in. (50
mm) higher at the rear than the normal mode height.
This mode is suitable when driving on bumpy roads or through water.
High height mode is only available when the vehicle speed is under 19
mph (30 km/h).
■ “N” (normal) height mode
The standard vehicle height. This mode is suitable for ordinary driving.
■ “LO” (low) height mode
Vehicle height is 2.0 in. (50 mm) lower at the front, and 1.6 in. (40 mm)
lower at the rear than the normal mode height.
This mode allows easy access to the vehicle.
Low height mode is only availabl e when the vehicle is stopped. When
you start the vehicle, normal height mode is automatically selected.
Conditions for changing the vehicle height mode
Some modes may not be selectable depending on the vehicle speed
when the four-wheel drive control lev er is in the “H” position. Refer to the
following table.
Low modeNormal modeHigh mode
Vehicle stoppedYe sYe sYe s
Under 19 mph (30 km/h)NoYe sYe s
19 mph (30 km/h) or overNoYe sNo

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2-4. Using other driving systems
AHC indicator lightsIf you change the vehicle height mode, the indicator lights change as fol-
lows: • The current mode indicator light w ill turn off, and the selected mode
indicator light will begin flashing.
• Once the change in vehicle height is complete, the selected mode indicator light will change fr om flashing to continuously lit.
If you press the height control switch while AHC is off, the current mode
indicator light will turn on and the selected mode indicator light will begin
flashing while the system starts up.
Once the system has star ted, the current mode indi cator light will turn off.
■Operating conditions
●The engine must be running.
●All side doors and the back door must be closed.
■Automatic change in vehicle height when in the high mode
●If the vehicle speed exceeds 19 mph (30 km/h) with the four-wheel drive con-
trol lever in the “H” position, normal mode is automatically selected.
●If the vehicle speed exceeds 30 mph (50 km/h) with the four-wheel drive con-
trol lever in the “L” position, the vehicle height is lowered to 1.0 in. (25 mm)
higher than the normal mode height. If the vehicle speed drops to 12 mph (20
km/h) or less, high mode is automatically resumed.

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2-4. Using other driving systems
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When driving
■Extra high mode
If the vehicle becomes stuck, extra high mode may be automatically selected when
the vehicle height is in high mode with the four-wheel drive control lever in the “L”
position.
The vehicle height is raised to 2.8 in. (70 mm) higher than the normal mode height,
or slightly higher.
Extra high mode will change back to high mode when:
• The vehicle is no longer stuck
• The four-wheel drive control lever is shifted to a position other than “L”
●If you push “ ▼” when in extra high mode, normal mode is selected.
●Extra high mode cannot be manually selected.
■Turning off the active height control suspension
●The system will remain off until the switch is pushed again, even if the ignition is
turned off.
●Even if AHC is turned off, the system automatically selects the normal mode if
the vehicle's speed exceeds 19 mph (30 km/h).
■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 approximatel y 375 lb. (170 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” is lit
on the height mode indicator, the vehicle is loaded too heavily. Take extra care
when driving in this condition.
If the vehicle height cannot be raised even after unloading the vehicle, press
“ ▼ ” then “ ▲” on the height mode select switch. If the vehicle height still cannot
be raised, turn the ignition off th en on again, then try once more.

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2-4. Using other driving systems
■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. In this case, the indi-
cator lights will change as follows:
●The current mode indicator light will turn off, and the target mode indicator light
will begin flashing.
●The target mode indicator light will turn off, and the original mode indicator light
will be lit once more. (The vehicle height does not change.)
■In the following cases AHC will not operate
●The brake pedal has been depressed for longer than 5 seconds while the vehi-
cle is stopped.
●The suspension fluid temperature is lower than -22°F (-30°C).
●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 tempera-
ture drops below -5°F (-15°C).
AHC does not operate when the suspension fluid temperature drops below -22°F
(-30°C).
●In this case, the selected height mode indicator light will flash when the height
mode select switch is pressed, however the vehicle height will not change.
Once the engine has warmed the suspension fluid to within normal operating
limits, 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 AHC is operating. In this case, push “ ▼” then “▲ ”
on the height mode select switch after further warming the engine to select the
desired vehicle height.

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2-4. Using other driving systems
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When driving
■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.
■Propeller shaft noise
If the vehicle height is adjusted on a slop e, or with the selector 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 propel ler shaft. This does not indicate a mal-
function.
■Continued system operation
Even if the engine is stopped while the ve hicle height is being lowered, operation
will continue for up to 12 seconds.
■Active height control failure warning
●If a malfunction occurs in the AHC system, normal mode is automatically
selected.
The height control “ OFF” indicator will bl ink, and AHC cannot be activated until
the malfunction is corrected.
Stop the engine and start it again. If the height control “OFF” indicator light
turns off, the system is operating correc tly. If the indicator light continues to
blink, have the vehicle checked at your Lexus dealer as soon as possible.
●If the height control “OFF” indicator light does not come on when the ignition
switch is turned on, there is a malfunction in the AHC system. You can continue
normal driving, however have the vehicle checked by your Lexus dealer as soon
as possible.
■Installing or removing heavy equipment
If the equipment exceeds 33 lb. (15 kg), the front torsion bar must be adjusted. See
your Lexus dealer.

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2-4. Using other driving systems
CAUTION
■Using the high and extra high modes
These modes should only be used for rough off-road conditions. Because the vehi-
cle's center of gravity is higher when in these modes, the vehicle may become
unstable when turning abruptly, resulting in an accident.
■When jacking up the vehicle or installing tire chains
Turn off the AHC and stop the engine, otherwise the vehicle height may change
due to the automatic leveling function, resulting in an accident.
■When driving through water deeper than 1.6 ft. (0.5 m)
Select the “HI” (high) mode and turn off AHC. Drive at 19 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 AHC, otherwise the vehicle
height may change due to the automatic le veling function, resulting in an accident.
■If your vehicle becomes stuck in a ditch
Turn off AHC, otherwise the vehicle height may change due to the automatic level-
ing function, resulting in an accident.

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2-4. Using other driving systems
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When driving
NOTICE
■To avoid damage to the vehicle
●If in the low mode, the vehicle automatically shifts to the normal mode when the
vehicle is started. Take care when overhead height is limited.
●After unloading, the vehicle height may be slightly higher than normal. Take care
when overhead height is limited.
●Before lowering the vehicle height, check that no-one is under the vehicle and
the area is free of obstructions. Also check that the underbody of the vehicle will
not touch the ground.
●Do not select the low mode when drivin g on bumpy roads, as the underbody of
the vehicle may contact the road surface.
■Avoid rapid changes to the vehicle height
As the pump may overheat. Leave at least a minute between selections when
changing the AHC mode.

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2-5. Driving information
Off-road precautions
Off-road vehicle feature● Specific design characteristics give it a higher center of gravity than
ordinary passenger cars. This vehicle design feature causes this type of
vehicle to be more likely to rollov er. And, utility vehicles have a signifi-
cantly higher rollover rate than other types of vehicles.
● An advantage of the higher ground clearance is a better view of the
road allowing you to anticipate problems.
● It is not designed for cornering at the same speeds as ordinary passen-
ger cars any more than low-slung sports cars designed to perform sat-
isfactorily under off-road condit ions. Therefore, sharp turns at
excessive speeds may cause rollover.
This vehicle belongs to the utilit y vehicle class, which has higher
ground clearance and narrower tread in relation to the height of its
center of gravity to make it capable of performing in a wide variety of
off-road applications.

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2-5. Driving information
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When driving
Connecting trailer lightsUse the wire harness stored in the rear end under body.
■When connecting and disconnecting a trailer Connecting
Set the active height control suspension to “LO” mode.
Turn off the ignition switch or th e active height control suspension.
Connect the trailer.
Turn on the switch that was turned off on step 2.
Set the active height control suspension to “N” mode.
Disconnecting
Set the active height control suspension to “LO” mode.
Turn off the ignition switch or th e active height control suspension.
Set the supporting leg of the trailer on the ground and raise the hitch by 4
in. (100 mm).
Turn on the switch that was turned off on step 2.
Wait until vehicle height is stabilized.
Make sure the hitch is disconnected. If the hitch does not disconnect, raise
the hitch higher and repeat steps 2 through 5.
Move the vehicle forward in the “LO” mode to a point where the hitch
does not touch anything in the “N” mode.
Set the active height control suspension in the “N” mode.
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2-5. Driving information
■Before towing
Check that the following conditions are met:
●The vehicle’s tires are properly inflated. (P. 3 0 2 )
●Trailer tires are inflated according to the trailer manufacturer’s recommenda-
tion.
●All trailer lights work.
●All lights work each time you connect them.
●The trailer ball is set up at the proper height for the coupler on the trailer.
●The vehicle remains level when a loaded or unloaded trailer is hitched. Do not
drive if the vehicle is not level, and check for improper tongue load, overloading,
worn suspension, or other possible causes.
●The trailer cargo is securely loaded.
●The rear view mirrors conform to all applicable federal, state/provincial or local
regulations. If they do not, install rear view mirrors appropriate for towing pur-
poses.
■Break-in schedule
Lexus recommends that you do not use a new vehicle or a vehicle with any new
power train components (engine, transmission, differential, wheel bearings, etc.) to
tow a trailer for the first 500 miles (800 km) of driving.
■Maintenance
●If you tow a trailer, your vehicle will require more frequent maintenance due to
the additional load. (See “Warranty and Services Guide/ Owner’s Manual Sup-
plement/ Scheduled Maintenance”.)
●Retighten the fixing bolts of the towing ball and bracket after approximately
600 miles (1000 km) of trailer towing.