Lexus Lx470 Owner's Manual page 153

Parking and stopping tips
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If you immediately stop the engine after off-road driving, or park the vehicle for
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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
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stopped. The vehicle will return to the set height when the engine is started.
Propeller shaft noise
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If the vehicle height is adjusted on a slope, 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 propeller shaft. This does not indicate a mal-
function.
Continued system operation
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Even if the engine is stopped while the vehicle height is being lowered, operation
will continue for up to 12 seconds.
Active height control failure warning
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If a malfunction occurs in the AHC system, normal mode is automatically
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selected.
The height control "OFF" indicator will blink, 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 correctly. 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
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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
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If the equipment exceeds 33 lb. (15 kg), the front torsion bar must be adjusted. See
your Lexus dealer.
2-4. Using other driving systems
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