steering Lexus GS350 2011 Service Manual

156
2-3. Operating the lights and windshield wipers
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
AFS (Adaptive Front lighting System) (if equipped)
AFS improves visibility at intersections and on curves by automatically
adjusting the level of the headlights according to vehicle speed and the
degree of the tire angle that are controlled by steering input.
Operates at speeds of 6 mph (10 km/h) or higher.
■ Deactivating AFS
Press the switch to turn it off.
The indicator turns on when
the AFS is deactivated.
■Daytime running light system
●To make your vehicle more visible to other drivers, the headlights turn on auto-
matically (at a reduced intensity) whenever the engine is started and the parking
brake is released. Daytime running lights are not designed for use at night.
●Compared to turning on the headlights, the daytime running light system offers
greater durability and consumes less electricity, so it can help improve fuel
economy.

179
2-4. Using other driving systems
2
When driving
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
CAUTION
■When the radar sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in
front of you.
As the sensor may not be able to correctly detect these types of vehicles, the prox-
imity alarm ( →P. 552) will not be activated, and a serious or fatal accident may
result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (trailers with no load on board etc.)
●Motorcycles traveling in the same lane
■Conditions under which the vehicle-to-vehicle distance control may not function
correctly
Apply the brakes as necessary in the following conditions as the radar sensor may
not be able to correctly detect vehicles ahead, and a serious or fatal accident may
result.
●When water or snow thrown up by the surrounding vehicles hinders the function-
ing of the sensor
●When your vehicle is pointing upwards (caused by a heavy load in the trunk, etc.)
●When the road curves or when the lanes are narrow
●When steering wheel operation or your position in the lane is unstable
●When the vehicle ahead of you decelerates suddenly

181
2-4. Using other driving systems
2
When driving
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
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, and one in each corner of the bumper,
to detect obstacles in those areas.
The dual sensors detect obstacles ahead of the vehicle, 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.

183
2-4. Using other driving systems
2
When driving
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
Multi-information display and touch screenIf the sensors detect an obstacle, it is displayed on the multi-information
display in the instrument cluster.
You can change the conditions under which information is displayed on
the touch screen. ( →P. 245)
Multi-information display
Dual sensor detection
Steering guide symbol
Rear corner sensor detection
Back sensor detection
To u c h s c r e e n Dual 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
assist will be shown in the upper
right corner of the screen.
(→ P. 1 8 6 )

186
2-4. Using other driving systems
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
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
Approximate distance
to obstacleWi th bee ps
(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 f t. (25 cm)
(blinking rapidly)(continuous)
Less than
0.8 f t. (25 cm)
(continuous)


188
2-4. Using other driving systems
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm

Steering guide symbolDisplays the steering maneuvers required to avoid an obstacle. Move the
steering wheel in the direction shown by the arrow. The steering guide symbol only
shows the maneuvers necessary to
avoid an obstacle.
When using the system, always
check your surroundings for
safety.
Beeps and obstacle distance
A beep sounds when an obstacle with which there is a danger of collision
is detected. As the vehicle moves closer to the obstacle, the interval of
the beep becomes shorter.
● When the following obstacle distances are reached, the beep changes
from intermittent to continuous:
• If the distance to the obstacle detected by the dual sensors or rear corner
sensors is less than 0.8 ft. (25 cm).
• If the distance to the obstacle detected by the back sensors is less than 1.1 ft. (35 cm).
●If obstacles are detected by the du al sensors in 2 places at once, or if
both rear corner sensors detect obstacles at the same time, the system
will sound a warning beep for the closer of the 2 obstacles.

192
2-4. Using other driving systems
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
■CertificationFor vehicles sold in the U.S.A.
For vehicles sold in Canada
CAUTION
■While driving
To reduce the chance of injury in the event of an accident or sudden stop, keep the
switch box closed.
■When using the 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 moving 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 incorrectly, 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.

193
2-4. Using other driving systems
2
When driving
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
NOTICE
■When using the 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.

199
2-4. Using other driving systems
2
When driving
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
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)
Helps to prevent wheel lock when the brakes are applied suddenly, or if
the brakes are applied while driving on a slippery road surface.
■Brake assist
Generates an increased level of braking force after the brake pedal is
depressed, when the system detects a panic stop situation.
■Enhanced VSC (Enhanced Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces.
■TRAC (Traction Control)
Helps to maintain drive power and prevent 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 operates for approximately 5 seconds at maxi-
mum.
■EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.
■Active stabilizer suspensi on system (if equipped)
Reduces sway when cornering according to steering wheel movement
and the selected suspension damping mode, in order to maintain a stable
vehicle posture.
■PCS (Pre-Collision System) (if equipped)
→ P. 2 0 6

200
2-4. Using other driving systems
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
When the Enhanced VSC/TRAC/hill-start assist control systems are
operating
If the vehicle is in danger of slip-
ping, rolling backwards when
starting on an incline, or if the rear
wheels (2WD models) or all
wheels (4WD models) spin, the
slip indicator light flashes to indi-
cate that the Enhanced VSC/
TRAC/hill-start assist control sys-
tems have been engaged.
A buzzer (intermittent) sounds to
indicate that Enhanced VSC is
operating.
The stop lights and high mounted
stoplight turn on when the hill-start
assist control system is operating.
GS460: The slip indicator lightflashes as well when
ABS is operating.
■VGRS (Variable Gear Ratio Steering) (GS460)
Adjusts the wheel turning angle in accordance with the vehicle speed and
steering wheel movement.
■VDIM (Vehicle Dynamics Integrated Management)
Provides integrated control of the ABS, Enhanced VSC, TRAC, hill-start
assist control, VGRS (GS460) and EPS systems.
Helps to maintain vehicle stability when swerving on slippery road sur-
faces by controlling the brakes, engine output, and the movement of the
front wheels.