LEXUS LS430 2005 Owners Manual

STARTING AND DRIVING
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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333
Dynamic laser cruise control—
The laser radar sensor in this system primarily detects the
reflectors 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 laser 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 laser cruise control is not a
collisionavoidance system and will not prevent
accidents. The dynamic laser 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 laser cruise control.
(a) Dynamic radar/laser cruise control operations
31L360b
The dynamic radar/laser cruise control function operates
automatically and depending on whether a vehicle is
detected ahead may change the speed of your vehicle as
follows:

STARTING AND DRIVING
334If no vehicle is running ahead of you:
1
Cruising at a fixed speed: If there is no vehicle detected
ahead, your cruising speed is maintained at the preset
speed from about 45 km/h (28 mph) to about 135 km/h (85
mph). The preset speed is displayed in the
multi−information display. For the vehicle speed setting,
see “Setting operation ” on page 340.
If a vehicle is detected ahead of you:
2 Deceleration cruising function: If a slower moving
vehicle is detected ahead of you, your vehicle cruising
speed decreases within the range of about 40 km/h (25
mph) to about 135 km/h (85 mph). The multi− information
display shows the preset speed, the detected vehicle
ahead and selected vehicle− to−vehicle distance. If your
vehicle gets closer to the vehicle ahead because of
insufficient automatic deceleration, then the warning tone
warns you to also manually apply brakes.
3 Followup cruising function: After deceleration, your
vehicle cruising speed changes in proportion to the speed
of the vehicle ahead to maintain an appropriate distance
from your vehicle to the vehicle ahead. The
vehicle −to−vehicle distance can be changed. For details,
see “Changing vehicle −to−vehicle distance setting” on
page 346.
4 Acceleration cruising function: If the vehicle ahead
changes lanes, your vehicle cruising speed will be
gradually increased up to the preset speed, and your
vehicle resumes fixed −speed cruising.
CAUTION
Under certain conditions where the vehicle in front
slows drastically, or is stopped, the dynamic radar/laser
cruise control will neither warn you nor decelerate. The
driver must depress the brake pedal to slow down,
ensuring collision avoidance or that sufficient
vehicletovehicle distance is maintained.
When vehicle −to−vehicle distance control mode is activated,
you must still be attentive to road and traf fic conditions. Should
your vehicle speed decrease below about 40 km/h (25 mph),
the dynamic radar/laser cruise control will shut off, requiring
you to apply the brakes to slow. When a vehicle ahead slows
suddenly, stops or a vehicle cuts in front, the system may slow
your vehicle abruptly, but the automatic braking will cease if the
speed decreases below about 40 km/h (25 mph) requiring the
driver’s manual application of brakes.

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335
Dynamic radar cruise control—
CAUTION
Certain conditions make vehicle detection difficult or
impossible.

As this system operates by detecting primarily the
reflected wave from the rear end of the vehicle ahead,
the distance cannot be accurately detected in the
following cases, resulting in improper
vehicletovehicle distance.
 The rear section of the vehicle ahead is extremely
small such as an unloaded trailer.
 The vehicle ahead or other vehicles around you
are flinging up water or snow.
 Heavy luggage which is loaded in your trunk or on
top of your rear seats is raising up the nose of your
vehicle.
 The millimeter wave radar sensor automatically
detects dirt if it is sticking to the front of the sensor
or grille cover of your vehicle, and if detected, a
message is shown on the multiinformation display.
However, if the sensor or grille cover is covered with
a metallic vinyl bag, icicle, snowflakes, etc., dirt may
not be detected, resulting in improper
vehicletovehicle distance. Continue driving with
due care to the vehicle ahead. If dirt is detected, the
dynamic radar cruise control function is
automatically cancelled. Always keep the sensor and
grille cover clean.

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336
Dynamic radar cruise control should not be used in the
following conditions, to avoid death or serious injury.
In bad weather (such as rain, fog, snow , sandstorms,
or when raindrops or snowflakes get in the millimeter
wave radar sensor or the grille cover), the
vehicletovehicle distance will not be measured
accurately.
If the wipers are operated at high speed (including the
high speed operation with the wiper lever in the
“AUTO” position), dynamic radar cruise control is
automatically cancelled. (In the case of the low speed
operation and intermittent wiper operation, it is not
cancelled.) Dynamic radar cruise control is
automatically cancelled when the measurement is
extremely unstable due to bad weather.
 On the roads in heavy traffic or at sharp bends:
As an appropriate speed cannot be maintained, death
or serious injury could result.
 On slippery road surfaces (icy or snowcovered road
surfaces):
The tires will race and you will be unable to control.On steep downhill slopes:
If there is no vehicle detected ahead, the preset speed
will be easily exceeded because of inefficient engine
braking, resulting in death or serious injury. (In this
case, automatic braking will not work.) If there is a
vehicle detected ahead, the delay in deceleration
timing could cause death or serious injury.
 When the warning tone sounds frequently (because
acceleration or deceleration was repeated or
sufficient vehicletovehicle distance was not
maintained), an appropriate vehicle speed cannot be
attained, resulting in death or serious injury.
 On roads with steep and short inclines and declines,
failure to detect the vehicle ahead will shorten the
distance between your vehicle and the vehicle ahead,
resulting in death or serious injury.

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337
Dynamic laser cruise control—
CAUTION
Certain conditions make vehicle detection difficult or
impossible.

As this system operates by detecting primarily the
reflectors of the vehicle ahead, the distance cannot
be accurately detected in the following cases,
resulting in improper vehicletovehicle distance.
 The vehicle ahead has higher ground clearance,
which means that the placement of the reflectors
is in a higher position.
 The rear section of the vehicle ahead is extremely
dirty.
 The vehicle ahead or other vehicles around you
are flinging up water or snow.
 Excessive exhaust gas (black smoke) is coming
from the vehicle ahead or other vehicles around
you, obscuring your front view.
 Protective film is attached to the reflectors on the
vehicle ahead, or reflectors are not installed on the
vehicle ahead or are damaged.
 Heavy luggage which is loaded in your trunk or on
top of your rear seats is raising up the nose of your
vehicle.
 The laser radar sensor automatically detects dirt if it
is sticking to the sensor glass of your vehicle, and if
detected, a message is shown on the
multiinformation display. However, if the sensor
glass is covered with a transparent or translucent
vinyl bag, icicle, etc., dirt may not be detected,
resulting in improper vehicletovehicle distance.
Continue driving with due care to the vehicle ahead.
If dirt is detected, the dynamic laser cruise control
function is automatically cancelled. Always keep the
sensor glass clean.

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338
Dynamic laser cruise control should not be used in the
following conditions, to avoid serious injury or death.
 In bad weather (such as rain, fog, snow, sandstorms
or direct sunlight, or when raindrops or snowflakes
get in the laser radar sensor glass), the
vehicletovehicle distance will not be measured
accurately.
If the wipers are operated at high or low speeds
(including the high and low speed operation with the
wiper lever in the “AUTO” position), dynamic laser
cruise control is automatically cancelled. (In the case
of intermittent wiper operation, it is not cancelled.)
Dynamic laser cruise control is automatically
cancelled when the measurement is extremely
unstable due to bad weather.
 On the roads in heavy traffic or at sharp bends:
As an appropriate speed cannot be maintained,
serious injury or death could result.
 On slippery road surfaces (icy or snowcovered road
surfaces):
The tires will race and you will be unable to control.On steep downhill slopes:
If there is no vehicle detected ahead, the preset speed
will be easily exceeded because of inefficient engine
braking, resulting in serious injury or death. (In this
case, automatic braking will not work.) If there is a
vehicle detected ahead, the delay in deceleration
timing could cause serious injury or death.
 When the warning tone sounds frequently (because
acceleration or deceleration was repeated or
sufficient vehicletovehicle distance was not
maintained), an appropriate vehicle speed cannot be
attained, resulting in serious injury or death.
 On roads with steep and short inclines and declines,
failure to detect the vehicle ahead will shorten the
distance between your vehicle and the vehicle ahead,
resulting in serious injury or death.

STARTING AND DRIVING
339
Dynamic radar/laser cruise control—
31L361a
Dynamic radar/laser cruise control should not be used in
circumstances which are inappropriate for any cruise control
such as entering freeway on
−ramps or off −ramps.
CAUTION
The dynamic radar/laser cruise control should not be
used when exiting from, or when entering or merging
onto a freeway. When you are following a slower
moving vehicle and exiting, the sensor does not detect
the vehicle and will accelerate to preset speed.
(b) Turning the system on
31L633
To operate the dynamic radar/laser cruise control, push the
“ON− OFF” button. This turns the system on. When the
“CRUISE” indicator light in the instrument cluster comes on
and “RADAR READY” appears on the multi− information
display, you can now set your desired cruising speed and
vehicle −to−vehicle distance. Pushing the “ON −OFF” button
again will turn the system completely off and “CRUISE OFF”
will appear in the multi −information display.
When the ignition 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.
When the ignition is turned off, all the preset data is cleared.
When you use the dynamic radar/laser cruise control again,
you need to reset the data.

STARTING AND DRIVING
340The multi−
information display will return to the
vehicle −to−vehicle distance screen about 6 seconds after the
vehicle −to −vehicle distance screen has been changed to
another screen.
CAUTION
To avoid accidentally engaging the cruise control, keep
the “ONOFF” button off when not using the dynamic
radar/laser cruise control.
(c) Setting operation
31L634
 Each function is described below.
1
Setting the desired speed
The transmission must be in “D”, “6” (sixth range), “5”\
(fifth
range) or “4”(fourth range) before you set the cruise control
speed.

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341
After bringing the vehicle to
the desired speed, press the
control lever downward in the “– SET” direction and release it.
This sets the vehicle at that speed. At this time, the
multi−information display indicates settings such as the preset
vehicle speed, whether a vehicle is present ahead and
selected vehicle −to−vehicle distance. If there is no vehicle
detected ahead, the dynamic radar/laser cruise control screen
does not display the vehicle ahead. At this time, you may take
your foot off the accelerator pedal. If you need to accelerate
− for example, when passing − depress the accelerator pedal
enough for the vehicle to exceed the preset speed. When you
release the accelerator pedal, the vehicle will return to the
control prior to acceleration.
You cannot set a desired speed if the master warning light
comes on, the warning tone sounds and the multi− information
display indicates a warning me ssage such as “Cruise not
Available”, “Clean Radar Sensor” or “Check Cruise System”.
If any of the above messages appears on the display, see
“Vehicle −to−vehicle distance control mode failure warning” on
page 352.
If you turn off the “ON−OFF” button while the warning message
is displayed, the warning message turns off and the
multi−information display switches to another screen. If no
warning message appears on the display, when you turn the
“ON−OFF” button on again, the setting can be made.
You can change the dynamic radar/laser cruise control screen
to another screen even while the warning message is
displayed.
2 Cancelling the preset speed
You can cancel the preset speed by doing any of the following:
a. Pulling the control lever toward you, in the ”CANCEL”
direction.
b. Depressing the brake pedal.
c. Pushing the “ON −OFF” button at the end of the cruise
control lever.
If cancelled by a. or b., the multi−information display shows
“RADAR READY” and the dynamic radar/laser cruise control
enters the ready mode.
If cancelled by c., the “CRUISE” indicator light goes off in the
instrument panel and the multi −information display shows
“CRUISE OFF”. In this case, the preset speed data is cleared,
and you must set the speed from the beginning.