2005 LEXUS LS430 light

STARTING AND DRIVING
339
Dynamic radar/laser cruise control—
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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
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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.

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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.

STARTING AND DRIVING
342In the following case, the preset speed automatically
cancels out. At this time, the multiinformation display
shows “RADAR READY” and the dynamic radar/laser
cruise control enters the ready mode.
The vehicle speed falls below about 40 km/h (25 mph). (40
km/h (25 mph) is designated as a cancel speed.)
CAUTION
In this case, the warning tone reminds you that the
dynamic
radar/laser cruise control is cancelled and you
must apply the brakes to slow the vehicle.
In the following cases, the warning messages appear and
the preset speed automatically cancels out. When
dynamic radar/laser cruise control is restored, the
warning messages turn off and dynamic radar/laser
cruise control enters “RADAR READY” mode.
a. The slip indicator light blinks and a warning tone sounds.
(This occurs when the vehicle is about to skid.)
b. The driving pattern selector switch is set to “SNOW” mode.
c. The anti −lock brake system is activated by automatic
braking. (The warning tone sounds.)
d. The sensor does not operate properly because a foreign
matter sticks to the sensor.
Dynamic radar cruise control—
e. The wipers are operated at high speed (including high
speed operation with the wiper lever in the “AUTO” position.)
Dynamic laser cruise control—
f. The wipers are operated at high or low speeds (including
high and low speed operations with the wiper lever in the
“AUTO” position.)

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347
The vehicle
−to− vehicle distance is always set to “Long” when
the ignition switch is turned on.
CAUTION
 Select the vehicletovehicle distance
considering traffic conditions. The approximate
vehicletovehicle distance based on time
interval when driving at 88 km/h (55 mph) is
shown below :
“Long” about 75 m (about 245 ft.) . . . . . . . .
“Middle” about 50 m (about 165 ft.) . . . . . .
“Short” about 30 m (about 100 ft.) . . . . . . .
If the vehicle speed is slower than 88 km/h (55 mph),
the distance will be shorter than the above.
 During long downhill driving, the vehicletovehicle
distance will be shorter than the selected distance.
(e) Braking control
Dynamic radar/laser cruise control is not a collision avoidance
system. If an approach warning is activated, depress the brake
pedal to decelerate to ensure an appropriate
vehicle −to−vehicle distance.
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 1
Under the vehicletovehicle distance control
2Braking activated
Braking control is operating only when the vehicle −to− vehicle
distance control mode is selected and your vehicle speed
exceeds about 40 km/h (25 mph).
If you are getting closer to the vehicle ahead at relatively higher
speed than those of the vehicle ahead or if engine braking
cannot be applied properly, braking control is automatically
activated. The multi− information display changes as shown in
the illustration and the stop/tail lights on your vehicle and on the
vehicle on the display come on.

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(i) Vehicletovehicle distance control modefailure warning
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If there is trouble somewhere in the dynamic radar/laser cruise
control while the vehicle −to−vehicle distance control mode is
on, the ”CRUISE” indicator light in the instrument cluster
flashes, the master warning light comes on and the warning
tone sounds, and one or more of the following warning
messages will appear on the multi −information display.
 “Clean Radar Sensor”
 “Cruise not Available”
 “Check Cruise System”
If any warning message shown above appears, the preset
speed automatically cancels out.
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Dynamic radar cruise control—
If the system cannot easily measure the
vehicletovehicle distance because of a dirty millimeter
wave radar sensor or grille cover while the dynamic radar
cruise control is on, the above message appears.
If this message appears, clean the sensor and grille cover with
a soft cloth and try setting the preset speed again. If the dirt
is removed without cleaning, the system will automatically
enter the “RADAR READY” mode. If the system does not enter
the “RADAR READY” mode even after cleaning or the
message remains on the display, the system might be
malfunctioning. Although it is no problem to continue driving,
contact your Lexus dealer.
Dynamic laser cruise control—
If the system cannot easily measure the
vehicletovehicle distance because of a dirty laser radar
sensor glass while the dynamic laser cruise control is on,
the above message appears.
If this message appears, clean the sensor glass with a soft
cloth and try setting the preset speed again. If the dirt is
removed without cleaning, the system will automatically enter
the “RADAR READY” mode. If the system does not enter the
“RADAR READY” mode even after cleaning or the message
remains on the display, the system might be malfunctioning.
Although it is no problem to continue driving, contact your
Lexus dealer.

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353
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If the system cannot easily measure the
vehicletovehicle distance because of the following
conditions while the dynamic radar/laser cruise control is
on, the above message appears.
Dynamic radar cruise control—
 The driving pattern selector switch is set to the “SNOW”
mode.
 It is determined that it is difficult to make a measurement
because of bad weather (such as extremely hot weather)
 The wipers are operated at high speed with the wiper lever
in the “AUTO” position
Dynamic laser cruise control—
 The driving pattern selector switch is set to the “SNOW”
mode.
 It is determined that it is difficult to make a measurement
because of bad weather (such as rainy, foggy, or snowy
weather)
 The wipers are operated at high or low speeds with the
wiper lever in the “AUTO” position.
 Direct sunlight from the front In the following
cases, the dynamic radar/laser cruise
control switches to the “RADAR READY” mode:
Dynamic radar cruise control—
 The driving pattern selector switch is changed to the
“normal” or “power” position.
 The wipers are stopped or are switched to low speed or
intermittent operation. (Including intermittent and stopped
wipers in the “AUTO” position)
In the above conditions, press the control lever upward in the
“+ RES” direction and release it. The dynamic radar cruise
control will be restored, however, even after the weather
clears, if the setting operation cannot be performed or if the
warning message still appears, the system might have
malfunctioned. Although it is no problem to continue driving,
contact your Lexus dealer.

STARTING AND DRIVING
354Dynamic laser cruise control—

The driving pattern selector switch is changed to the
“normal” or “power” position.
 The wipers are stopped or are switched to intermittent
operation. (Including intermittent and stopped wipers in the
“AUTO” position)
 No direct sunlight from the front
In the above conditions, press the control lever upward in the
“+ RES” direction and release it. The dynamic laser cruise
control will be restored, however, even after the weather
clears, if the setting operation cannot be performed or if the
warning message still appears, the system might have
malfunctioned. Although it is no problem to continue driving,
contact your Lexus dealer.
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If the system malfunction is detected when dynamic
radar/laser cruise control is in the “RADAR READY” mode
or operating, the above message appears.
If this message appears, stop your vehicle in a safe place, turn
the ignition off, and then restart it to reset the system. 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.
NOTICE
While you are cruising with the dynamic radar/laser
cruise control on, if the master warning light comes on,
the cruise indicator light flashes, “Check Cruise
System” appears on the multiinformation display and
the warning tone sounds, turn the ignition switch off
and then on again. If the function is cancelled again
after setting or if settings cannot be made, the dynamic
radar/laser cruise control system may be
malfunctioning. Although it is no problem to continue
driving, have your vehicle checked by your Lexus
dealer.

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Conventional (fixed speed) cruise control
mode
This mode allows you to cruise at a desired speed over
about 45 km/h (28 mph) with your foot off the accelerator
pedal.
Cruising speed can be maintained, although a slight speed
change may occur when driving up or down a gradient, within
the limits of engine performance. On steeper hills, the speed
will change more radically so it is better to drive without cruise
control.
When cruise control is on, the driving pattern of the automatic
transmission is fixed in the normal position, regardless of the
position of the selector switch.
CAUTION
 In the conventional (fixed speed) cruise control
mode, an approach warning does not activate even 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.
 The conventional (fixed speed) cruise control mode
of the dynamic radar/laser cruise control should not
be used in the following conditions, which could
result in death or serious injury.
 To help maintain maximum control of your vehicle,
do not use fixed speed control mode when using
dynamic radar/laser cruise control while driving in
heavy or varying traffic, or on slippery (rainy, icy
or snowcovered) or winding roads.
 Avoid vehicle speed increasing when driving
downhill. If the vehicle speed is too fast in relation
to the preset speed in the fixed speed control
mode, cancel the fixed control mode and then
downshift the transmission to use engine braking
to slow down.