2006 Lexus GS300 stop start

STARTING AND DRIVING
377 NOTE:
* The detection range can be changed from about 50 cm
(1.5 ft.) for dual sensors and about 60 cm (2 ft.) for back
sensors.
Ask your Lexus dealer for details.
The intuitive parking assist may not work properly in the
following cases:
When the bumper is damaged.
When the part near the sensors is subjected to a strong
impact.
When an accessory is installed within the sensor detection
range.
When snowflakes or mud gets on the sensors.
(If removed, the system will work properly.)
When water is splashed from a high pressure car wash or
steam on the sensors.
When a sensor is covered with your hand.
When the vehicle is tilted.
In extreme hot or cold weather
(In extreme cold weather, the error display appears and the
system becomes inoperative.)
When driving on bumpy roads, slopes, gravelled roads or
grass.Devices issuing ultrasonic waves are operated around your
vehicle, such as a horn from another vehicle, motorcycle
engine, air braking sound from heavy−duty vehicles.
When another vehicle equipped with ultrasonic sensors
gets close to your vehicle.
When heavy rain or water is splashed over the vehicle.
(Drive carefully as the braking distance may be affected.)
When a radio antenna or fender pole is mounted on your
vehicle.
If towing eyelet is installed on your vehicle.
When you are driving towards a tall curb stone or curb stone
having right angle.
The detection range for an object such as a traffic sign may
be shortened.
An object just under the bumper cannot be detected.
Although an object lower than the location of sensors is
once detected, the detection might be stopped when your
vehicle gets closer to the object.
When an obstacle is very close to the sensors.

STARTING AND DRIVING
378The intuitive parking assist may not detect the following:
Thin objects such as wire or rope
Sound wave absorbing objects such as cotton or snow
Objects with a sharp edge
Tall objects with the upper part projected
Shorter objects
Intuitive parking assist failure warning
If an error is detected when the intuitive parking assist is
turned on, the vehicle symbol comes on or flashes with
beeping sounds.
At this time steering guidance is temporarily stopped.
However, the sensors functioning properly continue their
obstacle detection. For details, see “When the detection range
of the sensors is shorter” on page 381.
The intuitive parking assist failure warning display is not given
in either of the following operations:
Changing to another screen
Turning off the main switch for the intuitive parking assist

STARTING AND DRIVING
380When the steering sensor is malfunctioning
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If the steering sensor cable is broken and signals cannot
be received, the vehicle symbol comes on and the
steering guide symbol and arrows flash.
If only the steering sensor is malfunctioning, the warning
appears only on the multi−information display.
If this warning appears, have the sensor checked by your
Lexus dealer as soon as possible.When the neutral point of the steering sensor is unknown
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If the memorized neutral point of the steering is erased by
replacing the battery, the vehicle symbol, steering guide
symbol and arrows come on.
If only the neutral point of the steering sensor is unknown, the
warning appears only on the multi−information display.
If this warning appears, calibrate the neutral point of the
steering using either of the following:
Turn the steering wheel either way fully and then in the
opposite direction fully and slowly, with the vehicle stopped.
Drive on roads (with as few curves as possible and without
backing up) for more than about 5 minutes.
If this warning goes out, the calibration of the steering neutral
point is completed. If the warning still remains on, have the
sensor checked by your Lexus dealer as soon as possible.

STARTING AND DRIVING
381 As the intuitive parking assist might be malfunctioning in
the following cases, have it checked by your Lexus dealer.
The indicator in the instrument cluster does not come on
and a beep does not sound even when the intuitive parking
assist main switch is turned on.
The warning comes on despite no obstacle around the
vehicle.
When the detection range of the sensors is
shorter
In the following cases, the sensors will detect an obstacle
about 50 cm (1.5 ft.) from either front corner of the vehicle
and the steering guidance will be stopped. Accordingly,
the tire orientation symbol on the screen does not appear.
And only the warning according to the distance up to the
obstacle is given.
a. Any one of the sensors is malfunctioning.
b. Any one of the steering sensors is malfunctioning.
c. The steering sensor signal cannot be received properly.
d. The correct vehicle information cannot be given due to
extremely low battery voltage.
e. Proper steering detection (going straight) cannot be
detected
In case of a., when the intuitive parking assist returns to
normal, the steering guidance also comes back automatically.
In case of b. through e., the steering guidance also comes back
automatically after the neutral point of the steering sensor
calibration is completed.

STARTING AND DRIVING
398
CAUTION
Under certain conditions where the vehicle in front
slows drastically, or is stopped, the dynamic radar
cruise control will neither warn you nor decelerate. The
driver must depress the brake pedal to slow down,
ensuring collision avoidance or that sufficient
vehicle−to−vehicle distance is maintained.
When vehicle−to−vehicle distance control mode is activated,
you must still be attentive to road and traffic conditions. Should
your vehicle speed decrease below about 40 km/h (25 mph),
the dynamic radar cruise control will shut off, requiring you to
apply the brakes to slow. When a vehicle ahead slows
suddenly, stops or a vehicle cuts in front, the system may slow
your vehicle abruptly, but the automatic braking will cease if the
speed decreases below about 40 km/h (25 mph) requiring the
driver’s manual application of brakes.
CAUTION
Certain conditions make vehicle detection difficult or
impossible.
As this system operates by detecting primarily the
reflected wave from the rear end of the vehicle ahead,
the distance cannot be accurately detected in the
following cases, resulting in improper
vehicle−to−vehicle distance.
♦The rear section of the vehicle ahead is extremely
small such as an unloaded trailer.
♦The vehicle ahead or other vehicles around you
are flinging up water or snow.
♦Heavy luggage which is loaded in your trunk or on
top of your rear seats is raising up the nose of your
vehicle.
The millimeter wave radar sensor automatically
detects dirt if it is sticking to the front of the sensor
or cover of your vehicle, and if detected, a message
appears on the multi−information display. However,
if the sensor or cover is covered with a metallic vinyl
bag, icicle, snowflakes, etc., dirt may not be detected,
resulting in improper vehicle−to−vehicle distance.
Continue driving with due care to the vehicle ahead.
If dirt is detected, the dynamic radar cruise control
function is automatically cancelled. Always keep the
sensor and cover clean.

STARTING AND DRIVING
405
5
Resuming the preset speed
If the preset speed has been cancelled, when you push the
lever up in the “+ RES” direction while “RADAR READY”
shows up on the multi−information display and at a vehicle
speed of about more than 40 km/h (25 mph), the speed set
prior to cancellation will be restored.
During follow−up cruising, if there are no vehicles running
ahead because they have changed lanes, your vehicle will
accelerate gradually up to the preset speed.CAUTION
Deceleration cruising function and approach
warning do not operate when the vehicle ahead is at
a stop or driving very slowly.
While vehicle−to−vehicle distance control is on (on
follow−up cruising), acceleration and deceleration
are automatically performed in proportion to the
speed of the vehicle ahead detected. However, if the
vehicle ahead of you decelerates abruptly or if
another vehicle cuts in ahead of you, your vehicle
may collide with the vehicle ahead unless you
manually depress the brake pedal to slow down your
vehicle. If you need to accelerate because the vehicle
ahead or you changes lanes, then depress the
acceleration pedal.
Depending on the road configuration (curved roads,
left and right continuous curved roads, driving at the
start or end of the curve, narrow driving lanes due to
road construction) or your vehicle condition
(steering wheel maneuvering, position in the lane or
unstable driving because of an accident or
breakdown), vehicles in other lanes or surrounding
objects will be detected, resulting in a control failure
or the activated approach warning. This may also
result in a very close distance between vehicles due
to a failure to detect the vehicle ahead. Maneuvering
the steering wheel in response to a violent lateral
wind will cause similar conditions.

STARTING AND DRIVING
411
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If the system cannot easily measure the
vehicle−to−vehicle 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.
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If the system cannot easily measure the
vehicle−to−vehicle distance because of the following
conditions while the dynamic radar cruise control is on,
the above message appears.
The driving pattern selector switch is set to the snow
position.
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.
In the following cases, the dynamic radar cruise control
switches to the “RADAR READY” mode:
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
412
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If the system malfunction is detected when dynamic radar
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 engine switch 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 cruise
control on, if the master warning light comes on, the
“CRUISE” indicator light flashes, “CHECK CRUISE
SYSTEM” appears on the multi−information display and
the warning tone sounds, turn the engine switch off and
then on again. If the function is cancelled again after
setting or if settings cannot be made, the dynamic radar
cruise control system may be malfunctioning.
Although it is no problem to continue driving, have your
vehicle checked by your Lexus dealer.
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 mode, regardless of the
position of the selector switch.