4
4-5. Using the driving support systems
Driving
O The AHC does not operate when the
suspension fluid temperature drops
below -30°C (-22°F). In this case, even if
the height select switch is pressed, the
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 AHC will begin operating and the
vehicle height will automatically change
to the selected mode.
Q Parking and stopping tips
O If you immediately stop the engine after
off-road driving, 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.
O 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.
Q 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. This does
not indicate a malfunction.
Q AHC failure warning
O If a malfunction occurs in the AHC, N
mode is automatically selected. How-
ever, the system may not switch to N
mode depending on the location of the
malfunction. The warning message is dis-
played on the multi-information display,
and the AHC cannot be activated until
the malfunction is corrected.
O Stop the engine and start it again. If the
warning message turns off, the system is
operating correctly. If the warning mes-
sage continues to be displayed, have the
vehicle checked at your Lexus dealer as
soon as possible.
Q When switching the vehicle height
mode
Before lowering the vehicle height,
check that there are no people under or
around the vehicle, and check for obsta-
cles.
If you do not do this, body parts may be
caught in the vehicle, possibly leading to
an accident.
Q Using H2 mode
H2 mode should only be used when driv-
ing on rough roads, for example when
driving off-road. Because the vehicle’s
center of gravity will become higher
when in the mode, the vehicle may
become unstable when turning abruptly,
resulting in an accident.
Q When jacking up the vehicle or
installing tire chains
Turn off the height control and stop the
engine, otherwise the vehicle height may
change due to the automatic leveling
function and you may catch part of your
body in the vehicle, resulting in an acci-
dent.
Q When crossing rivers
Select H2 mode and turn off the height
control. Drive at 30 km/h (18 mph) or
lower. Otherwise the vehicle height may
change due to the automatic leveling
function, resulting in an accident.
Q If your vehicle must be towed
Put the vehicle height in N mode and
turn off the height control, otherwise the
vehicle height may change due to the
automatic leveling function and you may
catch part of your body in the vehicle,
resulting in an accident.
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