2006 LEXUS LS430 Owners Manual

129
2-4. Using other driving systems
2
When driving
Dynamic radar/ laser cruise control
The vehicle-to-vehicle distance control mode allows the vehicle to follow
another vehicle, adjusting to the leading vehicle’s speed variations, and the
conventional cruise control mode allows for driving at a preset speed, both
without the need to press the accelerator pedal.
■ Selecting a cruise control mode
Selecting the vehicle-to-vehicle
distance contr
ol mode
Turn the ON-OFF switch ON
Push the main switch again to turn
off the system.
Selecting the conventional cruise
control mode Turn the ON-OFF switch ON
Push and hold the lever for more
than one second.
Change to the conventional
cruise mode
The system is set to the vehicle-to-
vehicle distance control mode
each time the ignition is turned
ON.
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1
2

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2-4. Using other driving systems
■Adjusting the speed setting
Increasing
Decreasing
Hold the lever until the desired
speed setting is obtained.
■Canceling and resuming the speed setting
Cancel
The preset speed is also canceled if
the brake pedal is pressed.
Resume
The system will not resume opera-
tion if the vehicle speed is less than
40 km/h (25 mph).
■ Changing the vehicle-to-vehicle distance
The setting changes each time the
button is pushed.
Long
Middle
Short
“Long” mode is selected each time
the ignition is switched ON.
A vehicle is displayed ahead if one is
detected
.
1
2
1
2
1
2
3

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2-4. Using other driving systems
2
When driving
Cruising in the vehicle-to-vehicle distance control mode
The system employs a millimeter radar or laser radar sensor affixed in the
front end to detect the pr esence of a vehicle ahead as well as measuring
the distance from your vehicle. The detection range of the sensor is
approximately 400 ft. (120 m) ahead. Vehicle-to-vehicle distance will be
less than the selected distance during long downhill driving.
Fixed speed cruising:
If no vehicle is detected ahead.
Deceleration cruising:
If a slower moving vehicle is
detected ahead, your vehicle
decelerates automatically. Your
vehicle applies the brakes if
required, and “BRAKE” is dis -
played on the multi-information
displa
y. A warning buzzer will
sound if your vehicle gets too close
to the vehicle ahead due to insuffi -
cient braking.
Follow-up cruising:
If the vehicle ahead is traveling
slower than the preset speed, your
vehicle continually adjusts its speed
to maintain the preset following
distance.
Acceleration cruising:
When the vehicle ahead changes
lanes, your vehicle will gradually
accelerate up to the preset speed,
and resume fixed speed cruising.
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2
3
4

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2-4. Using other driving systems
■Setting vehicle speed
Settings can be made when the vehicle
is traveling above 28 mph (45 km/h).
■Unsuitable conditions
You cannot set the speed in the following conditions:
• When the selector lever is in a position other than D, 4, 5, or 6.
• When driving in adverse weather conditions.
■Automatic cruise control cancellation
In the following cases, the preset speed is can ce
lled. If the system is restored, cruise
control enters the ready mode.
• The slip indicator light blinks and a warning tone sounds.
• The anti-lock braking system activates.
• Foreign matter adheres to the sensor.
• The driving pattern selector sw it
ch is set to “SNOW” mode.
• The wipers are operated at high speed (radar), or either high or low speeds (l
aser). This includes high and low speed operation with the wiper lever in the
AUTO position.
• The vehicle’s speed falls below 25 mph (40 km/h). In this case, you must apply th
e brakes manually to slow the vehicle.
If the preset speed automatically cancels out for other than the above reasons, the
sy

stem may have malfunctioned. Do not operate the dynamic radar/laser cruise
control. You may continue driving, howe ver have your vehicle checked by your
Lexus dealer at the earliest opportunity.

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2-4. Using other driving systems
2
When driving
■Vehicle-to-vehicle distances
Select a vehicle-to-vehicle distance appropriate
to traffic conditions. The approxi-
mate vehicle-to-vehicle distance based on time interval when driving at 55 mph
(88 km/h) is sho

wn below:
If the vehicle speed is slower than 55 mph (88 km/h), the distance will be shorter
than ab
ove.
■Millimeter wave radar lase r sensor/ Laser radar sensor
The radar or laser sensor automatically detects dirt on the sensor or grill cover
(r
adar cruise control), or the sensor glass (laser cruise control). If dirt is detected, a
message is displayed on the multi-informatio n display, and the radar or laser cruise
control function is automatically cancelled.
ModeVehicle-to-vehicle distance
Long245 f t. (approx. 75 m)
Middle164 ft. (approx. 50 m)
Short100 ft. (approx. 30 m)
Vehicles with dynamic radar cruise con-
trol 
(Standard for vehicles with the Pre-Col-
lision system)
Grill cover
Sensor
Vehicles with dynamic laser cruise con-
trol
Sensor

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2-4. Using other driving systems
■Certifications for the millimeter wave radar laser sensor/ laser radar sensor
(U.S.A.)
●Millimeter wave radar sensor
FCC WARNING: 
Changes or modifications not expressly approved by the party responsible for
com
pliance could void the user’s authority to operate the equipment. 
FCC RF exposure information: 
This device complies with the FCC RF exposure requirements.
●Laser radar sensor 
This product is a class I laser product complied with 21 C.F.R part 1040.10 and
10
40.11.
■Certifications for the millimeter wave radar laser sensor/ laser radar sensor
(Canada)
Millimeter wave radar sensor 
Operation is subject to the following two conditions;
1. this device may not c
ause interference, and
2. this device must accept any interference r
eceived, including interference that
may cause undesired operation of the device.
■If the master warning light comes on and a warning message appears on the
multi-information display
If a system malfunction occurs when the dyn
amic radar/laser cruise control is on or
in the “RADAR READY” mode, the master warning light comes on, the “CRUISE”
indicator light flashes, a warning tone so unds, and “Check Cruise System” is dis-
played. ( P.334 )

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2-4. Using other driving systems
2
When driving
CAUTION
■To avoid accidentally engaging the cruise control
Keep the ON-OFF switch OFF when not in use.
■To avoid death or serious injury
The following conditions are unsuitable for cruise control use:
• In bad weather (rain, fog, sno
w, sandstorms, etc.)
• If the wipers are operated at high speed (radar cruise control), or at high or low spe
eds (laser cruise control.) This includes when the wiper lever is set to the
“AUTO” position.
• In heavy traffic.
• On roads with sharp bends.
• On slippery road surfaces.
• On steep downhill slopes.
• When the warning tone sounds frequently.
• On roads with steep, short inclines and declines.
• When exiting from, or when ente ri
ng or merging onto a freeway.
■When using the dynamic radar/laser cruise control
Always drive carefully and attentively.
Do not rely on the system to avoid accidents or control the vehicle’s speed in emer -
gency situations. The cruise control is not a collision-av
oidance system.
■Conditions which hinder the radar cruise control's vehicle detection capability
●The rear section of the vehicle ahead is extremely small (unloaded trailer etc.)
●The vehicle ahead or other vehicles are flinging up water or snow.
●Heavy luggage in your trunk or on your rear seats causes the nose of your vehicle
to rise.

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2-4. Using other driving systems
CAUTION
■Conditions which hinder the laser cruise control’s vehicle detection capability
A delay in detection of a vehicle may occur in the following situations. You must
ap
ply the brakes manually to avoid accidents.
• The vehicle ahead has higher ground clearance, meaning the reflectors are in a higher position
.
• The rear section of the vehicle ahead is extremely dirty.
• Surrounding vehicles are fl in
ging up water or snow.
• Your front view is obscured by excessive exhaust smoke.
• Protective film is attached to the reflectors of the vehicle ahead, or they are d
amaged.
• Reflectors are not installed on the vehicle ahead.
• Heavy luggage in your trunk or on your r
ear seats causes the nose of your vehi-
cle to rise.
• A vehicle cuts in at short range.
• A motorcycle is traveling along the side of the same lane
■To ensure the radar/laser cruise control system functions correctly
●Keep the radar sensor and grille cover/la ser sensor glass clean. When cleaning,
use a soft cloth and be careful not to damage the sensor or grille cover.
●Avoid strong impacts around the sensor, as incorrect sensor alignment will result
in system malfunction. A special device is required to adjust the sensor alignment.
See your Lexus dealer for adjustment.
●Do not disassemble the sensor.
●Do not affix stickers (including transparent stickers), or attach accessories
around the sensor or grille cover/sensor glass.
●Do not modify or paint the grille cover. When replacing the cover, be sure to use
a genuine Lexus cover. *
* Vehicles equipped with the radar cruise control only.