steering Lexus GS450h 2007 Using the hands-free system (for cellular phone) / LEXUS 2007 GS450H THROUGH JUNE 2006 PROD. (OM30727U) Owner's Guide

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2-4. Using other driving systems
2
When driving
Intuitive parking assist (if equipped)
Intuitive parking assist uses sensors in the front and rear of the vehicle to
detect the distance between the vehicle and any obstacles, and informs the
driver of this distance using the mult i-information display, the touch screen,
and warning beeps.

The system may be used at speeds less than about 6 mph (10 km/h).
■ Sensor types
Dual sensors
There are 4 sensors installed in the front bumper, two in the center section
to detect obstacles directly ahead, an d one in each corner of the bumper,
to detect obstacles in those areas. 
The dual sensors detect obstacles ahea d of the v
ehicle, and judge whether
avoidance maneuvers are necessary (whether the obstacle will come
within 0.8 ft. (25 cm) of the vehicle), according to the distance between
the obstacle and the vehicle, and the steering wheel position. The screen
display and beeps will change accordingly.
Rear corner sensors
These sensors detect obstacles around the rear corners of the vehicle.
Back sensors
These sensors detect obstacles behind the vehicle.

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2-4. Using other driving systems
2
When driving
Multi-information display and touch screen
If the sensors detect an obstacle, it is displayed on the multi-information
display in the instrument cluster. 
You can change the conditions under which informa tion is display
ed on
the touch screen. ( P. 1 5 3 )
Multi-information display
Dual sensor detection
Steering guide symbol
Rear corner sensor detection
Back sensor detection
Touch screenDual sensor detection
Steering guide symbol
Rear corner sensor detection
Back sensor detection
If the intuitive parking assist is
operated while the rear view moni-
tor is showing, the intuitive parking
as
sist will be shown in the upper
right corner of the screen. 
(  P. 1 4 4 )

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2-4. Using other driving systems
Touch screen (insert display)
Dual sensor (corner) detection
Rear corner sensor detection
Back sensor detection
The tire display and the steering
guide symbol will not be displayed.
■Dual sensor detection display and obstacle distance
Approximate distance
to obstacleWith beeps
(danger of collision)No beeps
(no danger of collision)
3.0 ft. (100 cm) to 1.5 ft.
(50 cm)
(blinking slowly)(continuous)
1.5 ft. (50 cm) to 1.1 ft.
(37.5 cm)
(blinking)(continuous)
1.1 ft. (37.5 cm) to 0.8 ft.
(25 cm)
(blinking rapidly)(continuous)
Less than 0.8 ft. (25
cm)
(continuous)


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2-4. Using other driving systems

Steering guide symbolDisplays the steering mane uv
ers required to avoid an obstacle. Move the
steering wheel in the direction shown by the arrow.
Multi-information display
Touch screen
• The steering guide symbol only shows the maneuvers necessary to avoid an obstacle.
• When using the system, always check your surroundings for safety.

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2-4. Using other driving systems
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When driving
If the steering neutral position is unknown
After the 12 volt battery has been reconnected, the steering sensor will
need to be initialized. At this time, if the dual sensors detect an obstacle,
the steering guide symbol and both arrows will be displayed.
Multi-information display
Touch screen
Use one of the following methods to initialize the steering sensor.
• With the vehicle stopped, turn the s teering wheel all the w
ay to the left,
then the right. (The order is not important.)
• Drive for more than 5 minutes on an un-cr
owded road with as few
curves and corners as possible.
If the steering guide symbol disappe ars, the steering sensor has been ini-
tialized. If the steering guide symbol does not disappear
, have the vehicle
checked by your Lexus dealer.

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2-4. Using other driving systems
If the steering information is not being correctly received
If the system is unable to receive signals from the steering sensor, or there
is a malfunction in the VGRS, the steering guide symbol and both arrows
will flash if the dual sensors detect an obstacle. 
In this case, have the vehicle checked by your Lexus dealer.
Multi-information display
Touch screen
If the steering guide symbol is on or flashing, the intuitiv
e parking assist
maximum detection range is reduced from 3.0 ft. (100 cm) to 1.5 ft. (50
cm). 
The steering sensor malfunction warnin g display will be aligned with the
intuitiv
e parking assist detection displa y or the intuitive parking assist mal -
function warning display.

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2-4. Using other driving systems
■CertificationFor vehicles sold in the U.S.A.
For vehicles sold in Canada
CAUTION
■Caution while driving
To reduce the chance of injury in the even t of an accident or sudden stop, keep the
switch box closed.
■When using intuitive parking assist
Observe the following precautions.
●The back sensors and rear corner sensors do not judge whether there is danger
of a collision, nor whether the obstacle can be avoided using the steering wheel.
When reversing, always check your surroundings and behind the vehicle for
safety.
●The steering guide symbol (arrow) is an approximate guide regarding obstacles.
It is not driving instructions. When movi ng forward or reversing, always check
your surroundings for safety and drive carefully.
●Do not install accessories within the sensors' detection areas, as this may cause
the intuitive parking assist to function inco rrectly, possibly leading to an accident.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions;
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference
that may cause undesired operation.
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme a la norme NMB-001 du Canada.

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2-4. Using other driving systems
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When driving
NOTICE
■When using intuitive parking assist
In the following situations, the system may not function correctly due to a sensor
malfunction etc. Have the vehicle checked by your Lexus dealer.
• A beep does not sound when you turn the main switch ON.
• The intuitive parking assist operation display flashes, and a beep sound when
no obstacle has been detected.
• If the area around a sensor collides with something, or is subjected to strong impact.
• If the bumper collides with something.
• If the display shows continuously without a beep.
■When changing tires
If you install tires of a size other than that recommended by the manufacturer, the
system will be unable to correctly detect steering wheel movement. Always use tire
sizes recommended by the manufacturer.
■When washing the vehicle
When washing the vehicle using high pressure cleaning equipment, do not spray
water directly on the sensors. Subjecting the sensors to high pressure impact may
cause a malfunction.

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2-4. Using other driving systems
Driving assist systems
To help enhance driving safety and performance, the following systems
operate automatically in response to various driving situations. Be aware,
however, that these systems are supplementary and should not be relied
upon too heavily when operating the vehicle.
■ABS (Anti-lock Brake System)
Restrains the vehicle from slipping when driving on slick road surfaces or
in the event of sudden braking.
■BA (Brake Assist)
Generates an increased level of braking force after the brake pedal is
depressed, when the system detects a panic stop situation.
■VSC (Vehicle Stability Control)
Helps the driver to control skidding wh en swerving suddenly or turning on
slippery road surfaces.
■ TRAC (Traction Control)
Maintains drive power and prevents the rear wheels from spinning when
starting the vehicle or accelerating on slippery roads.
■Hill-start assist control
Helps prevent the vehicle from rolling backwards when starting on an
incline or slippery slope. It operat es for approximately 5 seconds at maxi -
mum.
■ VGRS (Variable Gear Ratio Steering)
Adjusts the wheel turning angle in accordance with the vehicle speed and
steering wheel movement.
■EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.
■Active stabilizer suspension system
Turns at smaller angles to main tain the stable vehicle posture.

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2-4. Using other driving systems
To disable TRAC
If the vehicle gets stuck in fresh snow or mud, TRAC may reduce power
from the engine to the wheels. You may need to turn the system off to
enable you to rock the vehicle in order to free it.
Push the button to turn off TRAC.
The slip indicator light should come
on.
Push the button again to turn the
sy
stem back on.
Once you turn the power switch
“
OFF”, TRAC will be activated
automatically.
■Automatic TRAC reactivation
TRAC is reactivated when vehicle speed exceeds 30 mph (50 km/h) even if
“

TRAC OFF” has been turned off.
■Sounds and vibrations caused by the ABS, BA, VSC, TRAC, hill-start assist con-
trol and VGRS systems
●A sound may be heard from the engine compartment when the hybrid system is
started or just after the vehicle begins to move. This sound does not indicate that
a malfunction has occurred in any of these systems.
●Any of the following conditions may occur when the above systems are operat -
ing. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly af
ter the ABS is activated.
■Hill-start assist control is operational when
●The shift lever is in the “D” or “S” position.
●The brake pedal is not depressed.