2005 LEXUS LS430 ECO mode

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315
(g) If you cannot shift the selector lever
If you cannot shift the selector lever even though the brake
pedal is depressed, use the shift lock override button. For
instructions, see “If you cannot shift automatic transmission
selector lever” on page 423.
ELECTRONIC THROTTLECONTROL SYSTEM
The electronic throttle control system always maintains
appropriate engine output in relation to the accelerator
opening in all driving conditions.
31L322
 1Power position 2Normal position
3Snow position
The electronic throttle control system has 3 modes:
Normal, Power and Snow modes.
Normal mode: For ordinary driving, Lexus recommends that
you use the normal mode to improve fuel economy.
Power mode: For more powerful acceleration and sporty
driving.

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331
CAUTION
Always drive carefully and attentively when using either
cruise control mode. Read and understand the Owner’s
Manual thoroughly before using the cruise control. To
avoid death or serious injury, do not rely on the system
to avoid accidents or to control the vehicle’s speed in
emergency situations. Do not use cruise control except
in appropriate road and traffic conditions.
Changing the dynamic radar/laser cruise
control mode
31L632
 1 Vehicletovehicle distance control mode
2Conventional (fixed speed) cruise control mode
When you push the “ON −OFF” button, the vehicle −to− vehicle
distance mode is activated. To change to the conventional
(fixed speed) cruise control mode, push the lever in the
“MODE” direction for longer than about 1 second.
However, once the vehicle− to−vehicle distance control mode
activates and is used, it cannot be changed to the conventional
(fixed speed) cruise control mode using the above operation.
To change the mode, turn the “ON−OFF” button off and then
on. Next push the lever in the “MODE” direction for longer than
about 1 second.

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332To change to the vehicle
−to−vehicle distance control mode
from the conventional (fixed speed) cruise control mode, push
the lever in the “MODE” dire ction for longer than about 1
second.
CAUTION
In the conventional (fixed speed) cruise control mode,
a warning tone does not sound to warn you if you are too
close to the vehicle ahead, as neither the presence of
the vehicle ahead nor the vehicletovehicle distance is
detected. Pay special attention to the distance between
your vehicle and the vehicle ahead. Always confirm the
setting in the multiinformation display.
For the vehicle −to−vehicle distance control mode, see the
following description. For the conventional (fixed speed)
cruise control mode, see page 355.
Vehicletovehicle distance control mode
Dynamic radar cruise control—
The millimeter wave radar sensor in this system primarily
detects the reflected wave from the rear end of the vehicle
ahead of you to determine the presence of the vehicle
ahead as well as measuring the vehicletovehicle
distance. The detection range of the sensor is about 120
m (400 ft.) ahead.
When the dynamic radar cruise control is on, the driving
pattern (power, normal) of the automatic transmission is fixed
in the normal position, regardless of the position of the selector
switch.
CAUTION
The dynamic radar cruise control is not a
collisionavoidance system and will not prevent
accidents. The dynamic radar cruise control is a vehicle
speed control device that is intended for use only on
freeways or roads where the traffic is light or moderate.
To avoid serious injury, you must use caution and be
attentive to road and traffic conditions while using
dynamic radar cruise control.

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The approach warning may not turn on even if the
vehicle drives closer to the vehicle ahead in the
following conditions:
 Your vehicle and the vehicle ahead are cruising at
almost the same speed.
 The vehicle ahead is cruising at a faster speed than
yours. (The distance between the vehicles will
become longer.)
 Pay special attention to the very slow vehicle at the
end of the line in heavy traffic or at the tollgate.
 Immediately after the speed setting
 The accelerator pedal is depressed or immediately
after the release of the accelerator pedal(g) Millimeter wave radar sensor (Vehicles with dynamic radar cruise
control)
31L359a
 1Millimeter wave grille cover
2Millimeter wave radar sensor
The millimeter wave radar sensor is used for
vehicletovehicle distance control cruising. When the
millimeter wave radar sensor is disabled for some reason,
the warning message appears on the multiinformation
display. For details, see “Vehicletovehicle distance
control mode failure warning” on page 352.

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(a) Turning the system on
31L636
To operate conventional cruise control mode, push the
“ON−OFF” button. This turns the system on. The “CRUISE”
indicator light in the instrument cluster comes on and “RADAR
READY” appears on the multi −information display. Push the
control lever in the “MODE” direction for longer than 1 second
to change to conventional cruise control mode. The indicator
on the multi− information display is as shown. You can now set
your desired cruising speed. Pushing the “ON −OFF” button
again will turn the system completely off and “CRUISE OFF”
will appear in the multi −information display.
However, once the vehicle− to−vehicle distance control mode
activates and is used, it cannot be changed to the conventional
(fixed speed) cruise control mode using the above operation.
When the ignition switch is turned off, the “ON −OFF” button is
also automatically turned off. To use the dynamic radar/laser
cruise control again, push the “ON −OFF” button again to turn
it on.
CAUTION
To avoid accidentally engaging cruise control , keep the
“ONOFF” button off when not using dynamic
radar/laser cruise control.

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358In the following cases, the preset speed automatically
cancels out:
a. The vehicle speed falls below about 40km/h (25 mph).
b. If the vehicle speed drops 16 km/h (10 mph) below the
preset speed, the preset speed will also automatically be
cancelled.
c. The control lever is presse
d downward in the “– SET”
direction and held at less than about 45 km/h (28 mph). (45
km/h (28 mph) is designated as a lower preset speed limit .)
d. The slip indicator light blinks and a warning tone sounds.
(This occurs when the vehicle is about to skid.)
If the vehicle speed falls below about 40 km/h (25 mph), the
preset speed data is cleared and you must set the speed from
the beginning.
If cancelled by the above cases, the multi −information display
shows nothing and the conventional cruise control enters the
ready mode.
If the preset speed automatically cancels out for other than the
above reasons, do not operate the cruise control. Although it
is no problem to continue driving, have your vehicle checked
by your Lexus dealer at the earliest opportunity.
3 Resetting to a faster speed
Press the control lever upward in the “+ RES” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held upward, the vehicle will gradually gain
speed.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
increased 1.6 km/h (1 mph) each time by pressing the control
lever upward in the “+ RES” direction quickly within 0.6
seconds.
A quicker way to reset the speed is to accelerate and then
press the control lever downward in the “– SET” direction.

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359
4Resetting to a slower speed
Press the c ontrol lever downward in the “– SET” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held downward, the vehicle speed will
gradually decrease.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
lowered 1.6 km/h (1 mph) each time by pressing the control
lever downward in the “– SET” direction quickly within 0.6
seconds.
A quicker way to reset the preset speed is to depress the brake
pedal and then press the control lever downward in the “– SET”
direction.
Even if you downshift the transmission from the “D” or “6” (\
sixth
range) to “5” (fifth range), or from “D” or “5” (f\
ifth range) to “4”
(fourth range) in the conventional cruise control mode, engine
braking will not be applied because this mode is not cancelled.
To slow down, reset the cruise control to a slower speed with
the cruise control lever or depress the brake pedal. If you use
the brake pedal, cruise control is cancelled. 5 Resuming the preset speed
If the preset speed is cancelled by pulling the control lever, by
depressing the brake pedal or vehicle stability control
activation, pushing the lever up in the “+ RES” 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.
(c) Conventional cruise control mode failure warning
w281
If the system malfunction is detected when the
conventional cruise control mode is in the ready mode or
operating, the master warning light comes on, a warning
tone sounds and the above message appears.
If this message appears, push the “ON −OFF” button to turn the
system off and then push it again to turn it on. If the setting still
cannot be made or the same message appears again, the
system might have malfunctioned. Although it is no problem
to continue driving, contact your Lexus dealer.

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ELECTRONICALLY MODULATEDAIR SUSPENSION
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.
(a) Vehicle height adjustment
31L343
 1High position 2Normal position
This system maintains a stable vehicle height, regardless
of occupants and luggage weight. Select either of the
following modes using a selector switch. Normal mode:
Suitable for driving on roads with a normal
surface.
High mode: Suitable for driving on rough roads which are
unsurfaced or continually bumpy.
The damping effect is set slightly firmer in the high mode. So
you may feel the vibration of the vehicle compared to in the
normal mode. However, this does not mean a malfunction in
the system. We recommend you use a normal mode in normal
driving.
To change the mode, push the selector switch.
Normal mode:
The vehicle height remains at normal height at all driving
speeds.
High mode:
The vehicle height switches between the following two vehicle
heights according to the driving conditions:
Vehicle height
Driving condition
NormalMedium and high speed driving
HighLow speed driving