1999 Lexus LS400 height

STARTING AND DRIVING
301
Resuming the preset speed
If the preset speed is cancelled by pulling the control
lever or by depressing the brake pedal, pushing the lever
up in the ºRES/ACCº direction will restore the speed set
prior to cancellation. However, once the vehicle speed
falls below about 40 km/h (25 mph), the preset speed will
not be resumed.
Cruise control failure warning
If the ºCRUISEº indicator light in the instrument cluster
flashes when using the cruise control, push the main
switch to turn the system off and then push it again to
turn it on.
If any of the following conditions then occurs, there is
some trouble in the cruise control system.
 The indicator light does not come on.
 The indicator light flashes again.
 The indicator light goes out after it comes on.
If this is the case, contact your Lexus dealer and have
your Lexus inspected.
ELECTRONICALLY
MODULATED AIR SUSPENSION
(U.S.A. ONLY)
This electronically modulated air suspension
adjusts the damping effect on the shock absorbers
and the vehicle height. This adjustment is
automatically made in response to the driving
conditions to provide good riding comfort and
stability in all driving conditions.

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302
(a) Vehicle height adjustment
31L015a
This system maintains a stable vehicle height,
regardless of occupants and luggage weight. You
can select one of the following modes using a
selector switch.

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303
ºNORMALº
mode ± For driving on roads with a normal
surface.
ºHIGHº mode ± For driving on rough roads which are
unsurfaced or continually bumpy.
The damping effect is set slightly firmer in ºHIGHº mode.
So you may feel the vibration of the vehicle compared to
in ºNORMALº mode. However, this does not mean a
malfunction in the system. We recommend you use a
ºNORMALº mode in normal driving.
To change the mode, push the selector switch.
ºNORMALº mode
The vehicle height remains at normal height at all driving
speeds.
ºHIGHº mode
The vehicle height switches between the following two
vehicle heights according to the driving conditions:
Vehicle height
Driving condition
NormalMedium and high speed driv-
ing
HighLow speed driving

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304
31L016-2
The indicator light shows ºHIGHº mode is selected.
When you turn the ignition key to the ºONº position, the
indicator light will come on for 2 seconds in any mode.
NOTICE
For vehicles equipped with the height controlswitch, be sure to turn the ignition switch offbefore jacking. If this is not done, the vehicleheight adjustment function will operate, whichmay cause body damage.
(b) Malfunction warning
If the ºHIº indicator light blinks, there is a malfunction in
this system. Have the system checked by your Lexus
dealer at the first opportunity.
TRACTION CONTROL SYSTEM
The traction control system automatically helps
control the spinning of the rear wheels which may
occur when accelerating on slippery road surfaces,
thus assisting driver to control the driving power of
the rear wheels.

STARTING AND DRIVING
316The brake pedal pulsation caused by the anti±lock brake
system may indicate hazardous road surface
conditions. Although the anti±lock brake system assists
in providing vehicle control, it is still important to drive
with all due care, because the anti±lock brake system
cannot overcome the laws of physics that act on your
vehicle:

Braking capability is dependent on tire friction with the
road surface. 
Even though the anti±lock brake system is operating,
a driver cannot maintain full control on certain
slippery road surfaces, when cornering at high
speeds, or in violent maneuvers.
 Avoid high speeds on wet roads. The anti±lock brake
system cannot eliminate the risk of hydroplaning and
loss of tire friction.
Always maintain a safe distance from the vehicle in front
of you. Compared with vehicles not fitted with an
anti±lock brake system, your vehicle may require a
longer stopping distance in the following cases:
 Driving on rough, gravel or snow±covered roads.
 Driving with tire chains installed.
 Driving on roads where the road surface is pitted or
has other differences in surface height.

IN CASE OF AN EMERGENCY
350from traffic.
5. Read the following instructions thoroughly.
NOTICE
For vehicles equipped with the height control
switch, be sure to turn the ignition switch offbefore jacking. If this is not done, the vehicleheight adjustment function will operate, whichmay cause body damage.
CAUTION
When jacking, be sure to observe the following to
reduce the possibility of personal injury:
 Follow jacking instructions.
 Do not put any part of your body under a
vehicle supported by a jack. Personal injury
may occur.
Do not start or run the engine while your
vehicle is supported by the jack.
 Stop the vehicle on a level firm ground, firmly
set the parking brake and put the transmission
in ºPº. Block the wheel diagonally opposite to
the one being changed if necessary.
 Make sure to set the jack properly in the jack
point. Raising the vehicle with jack improperly
positioned will damage the vehicle or may
allow the vehicle to fall off the jack and cause
personal injury.
 Never get under the vehicle when the vehicle is
supported by the jack alone.
 Use the jack only for lifting your vehicle during
wheel changing.
 Do not raise the vehicle with someone in the
vehicle.
 When raising the vehicle, do not put an object
on or under the jack.
 Raise the vehicle only high enough to remove
and change the tire.
NOTICE

IN CASE OF AN EMERGENCY
371
40L019±1

Rear emergency towing eyeletsNOTICE
Do not use the rear emergency towing eyelets.
For vehicles sold in U.S.A., before your vehicleis transported by flat bed, the height control
switch, if so equipped, must be in the ºHIGHºmode.
 Tie down angle

CHASSIS
431
REPLACING WHEELS
When to replace your wheels
If you have wheel damage such as bending, cracks
or heavy corrosion, the wheel should be replaced.
If you fail to replace damaged wheels, a tire may slip off
a wheel or they may cause loss of handling control.
Replacement with used wheels is not recommended as
they may have been subjected to rough treatment or
high mileage and could fail without warning. Also, bent
wheels which have been straightened may have hidden
structural damage and therefore should not be used.
Never use an inner tube in a leaking wheel which is
designed for a tubeless tire.
Wheel selection
When replacing wheels, care should be taken to
ensure that they are equivalent to those removed in
load capacity, diameter, rim width, and offset.
Correct replacement wheels are available at your Lexus
dealer.
A wheel of a different size or type may adversely affect
handling, wheel and bearing life, brake cooling,
speedometer/odometer calibration, stopping ability,
headlight aim, bumper height, vehicle ground clearance,
and tire or snow chain clearance to the body and
chassis.
ALUMINUM WHEEL PRECAUTIONS
 After driving your vehicle the first 1600 km (1000
miles), check that the wheel nuts are tight.
 If you have rotated, repaired, or changed your tires,
check that the wheel nuts are still tight after driving
1600 km (1000 miles).
 When using tire chains, be careful not to damage the
aluminum wheels.
 Use only the Lexus wheel nuts and wrench designed
for your aluminum wheels.
 When balancing your wheels, use only Lexus
balance weights or equivalent and a plastic or rubber
hammer.
 As with any wheel, periodically check your aluminum
wheels for damage. If damaged, replace
immediately.