2013 Lexus GS300h Owner's Manual

3184-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Handling the radar sensor
Observe the following to ensure the cruise control system can function
effectively.
Otherwise, the system may not function correctly and could result in an
accident.
Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or
damage them.
Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunc-
tion. If the sensor or surrounding area is subject to a strong impact, always
have the area inspected and adjusted by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
Do not disassemble the sensor.
Do not attach accessories or stickers to the sensor, grille cover or sur-
rounding area.
Do not modify or paint the sensor and grille cover.
Do not replace them with non-genuine parts.

3194-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
Dynamic radar cruise control with full-speed
range

Dynamic radar cruise control with full-speed range supplements
conventional cruise control with a vehicle-to-vehicle distance con-
trol. In vehicle-to-vehicle distance control mode, the vehicle auto-
matically accelerates, decelerates or stops in order to maintain a set
following distance from vehicles ahead.
Vehicle-to-vehicle distance
button
Display
Set speed
Indicators
Cruise control switch

: If equipped
Summary of functions
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3204-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Press the “ON/OFF” button to
activate the cruise control.
Radar cruise control indicator will
come on.
Press the button again to deactivate
the cruise control.
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
“SET” indicator will be displayed.
The vehicle speed at the moment
the lever is released becomes the
set speed.
If this is performed when vehicle
speed is less than about 50 km/h
(30 mph) and the vehicle ahead
can be detected, your vehicle will
start following the vehicle ahead of
you at a set speed of about 50 km/h
(30 mph) (vehicle-to-vehicle dis-
tance control mode only).
Setting the vehicle speed (vehicle-to-vehicle distance control
mode)
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3214-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
To change the set speed, operate the lever until the desired set speed
is displayed.
Increases the speed
(Except when the vehicle has been
stopped by system control in vehi-
cle-to-vehicle distance control
mode)
Decreases the speed
Fine adjustment: Momentarily
move the lever in the desired direc-
tion.
Large adjustment: Hold the lever
in the desired direction.
In the vehicle-to-vehicle distance control mode, the set speed will be
increased or decreased as follows:
• When the set speed is shown in “MPH”
Fine adjustment: By approximately 8 km/h (5 mph) each time the lever
is operated
Large adjustment: By approximately 8 km/h (5 mph) for each 0.3 sec-
onds the lever is held
• When the set speed is shown in “km/h”
Fine adjustment: By approximately 5 km/h (3.1 mph) each time the
lever is operated
Large adjustment: By approximately 5 km/h (3.1 mph) for each 0.3 sec-
onds the lever is held
In the constant speed control mode (P. 309), the set speed will be
increased or decreased as follows:
Fine adjustment: By approximately 1.6 km/h (1 mph) each time the lever
is operated
Large adjustment: The set speed can be increased or decreased continually
until the lever is released.
Adjusting the set speed
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3224-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Pressing the button changes the
vehicle-to-vehicle distance as
follows:
Long
Medium
Short
The vehicle-to-vehicle distance is
set automatically to long mode
when the power switch is turned to
ON mode.
If a vehicle is running ahead of
you, the preceding vehicle mark
will also be displayed.
Select a distance from the table below. Note that the distances
shown correspond to a vehicle speed of 80 km/h (50 mph). Vehicle-
to-vehicle distance increases/decreases in accordance with vehicle
speed. When the vehicle is stopped by system control, the vehicle-
to-vehicle distance will be about 3 m (10 ft.) to 5 m (16 ft.) regard-
less of the vehicle-to-vehicle distance setting.
Changing the vehicle-to-vehicle distance
Preceding
vehicle
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Vehicle-to-vehicle distance settings
Distance optionsVehicle-to-vehicle distance
LongApproximately 50 m (160 ft.)
MediumApproximately 40 m (130 ft.)
ShortApproximately 30 m (100 ft.)

3234-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
After the vehicle ahead of you
starts off, push the lever up.
Your vehicle will also resume
follow-up cruising if the acceler-
ator pedal is depressed after the
vehicle ahead of you starts off.
Resuming follow-up cruising when the vehicle has been
stopped by system control

3244-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Pulling the lever toward you
cancels the cruise control.
The setting is also canceled when
the brake pedal is depressed while
driving.
(When the vehicle has been
stopped by system control, apply-
ing the brakes does not cancel the
setting.)
Pushing the lever up resumes
the cruise control and returns
vehicle speed to the set speed.
However, when a vehicle ahead is
not detected in vehicle-to-vehicle
distance control mode, cruise con-
trol does not resume when the
actual vehicle speed is approxi-
mately 40 km/h (25 mph) or less.
Also, when the vehicle is in con-
stant speed control mode and the
actual vehicle speed is approxi-
mately 40 km/h (25 mph) or less,
cruise control does not resume as
the set speed is cleared.
Canceling and resuming the speed control
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3254-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
This mode employs a radar sensor to detect the presence of vehicles
up to approximately 120 m (400 ft.) ahead, determines the current
vehicle-to-vehicle following distance, and operates to maintain a
suitable following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long
downhill slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-
vehicle distance can also be set by operating the vehicle-to-vehicle dis-
tance control.
Example of deceleration cruising and follow-up cruising
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automatically
decelerates your vehicle. When a greater reduction in vehicle speed is nec-
essary, the system applies the brakes. The system will respond to changes
in the speed of the vehicle ahead in order to maintain the vehicle-to-vehi-
cle distance set by the driver. A warning tone warns you when the system
cannot decelerate sufficiently to prevent your vehicle from closing in on
the vehicle ahead. When the vehicle ahead of you stops, your vehicle will
also stop. After the vehicle ahead starts off, pushing the cruise control
Driving in vehicle-to-vehicle distance control mode
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