Lexus LX 470 1998 Owner's Manual page 211

STARTING AND DRIVING
Operation in cold weather
The active height control suspension does not operate in cold
weather when the suspension fluid temperature drops below
−30_C (−22_F).
In this case, operating the height select switch does not change the
vehicle height. The vehicle height control enters the ready mode and
the selected height control indicator light blinks. The active height
control becomes operable if the engine is warmed up with the
suspension fluid temperature being raised within normal operating
limits. The vehicle changes to the selected height when the vehicle
height control is in the ready mode.
When the suspension fluid temperature is around −30_C (−22_F),
the vehicle height cannot be raised even within the available load
capacity. After warming up the engine, push the control switch on
the "B" side once and then on the "Y" side to select the desired
vehicle height.
It takes longer to change the vehicle height when the suspension
fluid temperature drops below −15_C (5_F).
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(g) Parking and stopping tips
If you immediately stop the engine to park the vehicle after off−road
driving, the vehicle height is lowered slightly as the vehicle becomes
cool. When parking, make sure there is nothing that will be in
contact with the underbody of the vehicle. When you start the
engine, the vehicle returns to the previous height.
If you park the vehicle for a long time, the vehicle height may
gradually lower. When parking for a long time, make sure there is
nothing that will come in contact with the underbody of the vehicle.
When you start the engine, the vehicle returns to the previous height.
If you stop the engine, the vehicle height may change in accordance
with the change in the temperature. When you start the engine, the
vehicle returns to the previous height.
(h) Installing or removing heavy equipment
If you install or remove heavy equipment exceeding 15 kg (33 lb.),
the front torsion bar and rear coil spring should be adjusted. Consult
your Lexus dealer.