2006 Lexus GS430 sensor

STARTING AND DRIVING
380When the steering sensor is malfunctioning
G31064
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
G31065
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.

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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 intu itive 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.

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382
Rear view monitor display (Vehicles with rear
view monitor system)
G31066
On vehicles equipped with rear view monitor system, a
warning appears on the right top of the rear view monitor
in the following conditions.
 When the selector lever is put in “R” and the rear view
monitor is turned on.
 When the intuitive parking assist main switch is turned on
and any sensor detects an obstacle.
Although “Display Off” is selected in the intuitive parking assist
setting screen, the warning appears on the right top of the rear
view monitor.
Dual sensors
G31067
 1 About 50 cm (1.5 ft.) to about 100 cm (3.0 ft.)
2About 37.5 cm (1.1 ft.) to about 50 cm (1.5 ft.)
3About 25 cm (0.8 ft.) to about 37.5 cm (1.1 ft.)
4Less than about 25 cm (0.8 ft.)
When the intuitive parking assist determines that the
collision will be unavoidable:
The indicator will flash yellow depending on the distance to the
obstacle. When the distance between the vehicle and the
obstacle is less than about 25 cm (0.8 ft.), the yellow indicator
will turn red.
When the intuitive parking assist determines that the
collision will be avoided by changing the steering:
The indicator will flash yellow depending on the distance to the
vehicle. The steering guide symbol and arrow do not appear.

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383
When the intuitive parking assist determines that the
collision will be avoided with the present steering angle:
The indicator will come on in green.
However, if the sensors detect and determine an obstacle at
an angle to the front of the vehicle, the indicator will not come
on.
Beeps (except for avoidable collisions at the present
steering angle):
As distance to the obstacle gets closer, the interval of the
intermittent
sound gets shorter, and then finally to a continuous
sound when the distance between the vehicle and the obstacle
is less than about 25 cm (0.8 ft.).
CAUTION
 When an obstacle is detected within about 25 cm (0.8
ft.) from the vehicle, the dual sensors will change the
determination to an unavoidable collision.
 With long obstacles such as walls, the decision of the
sensor may change as the obstacle gets closer; from
certain avoidance to avoidance if steering is
changed; from certain avoidance to unavoidable
collision; and there are also times when the decision
will be changed from avoidance if steering is
changed, to certain collision.
When you move your vehicle, be sure to confirm a safe
distance around your vehicle with your eyes and drive
slowly, or an accident or injury may result.
Rear corner sensors
G31068
 1 About 35 cm (1.1ft.) to about 50 cm (1.5 ft.)
2About 25 cm (0.8 ft.) to about 35 cm (1.1 ft.)
3Less than about 25 cm (0.8 ft.)
Display:
The indicator will flash yellow depending on the distance to the
obstacle. When the distance between the vehicle and the
obstacle is less than about 25 cm (0.8 ft.), the yellow indicator
will turn red.
Beeps :
As distance to the obstacle gets closer, the interval of the
intermittent sound gets shorter, and then finally to a continuous
sound when the distance between the vehicle and the obstacle
is less than about 25 cm (0.8 ft.).

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384
Back sensors
G31069
 1About 60.0 cm (2.0 ft.) to about 150 cm (5.0 ft.)
2About 45.0 cm (1.4 ft.) to about 60.0 cm (2.0 ft.)
3About 35.0 cm (1.1 ft.) to about 45.0 cm (1.4 ft.)
4Less than about 35 cm (1.1 ft.)
Display:
The indicator will flash in yellow depending on the distance to
the obstacle. When the distance between the vehicle and the
obstacle is less than about 35 cm (1.1 ft.), the yellow indicator
will turn red.
Beeps :
As distance to the obstacle gets closer, the interval of the
intermittent sound gets shorter, and then finally to a continuous
sound when the distance between the vehicle and the obstacle
is less than about 35 cm (1.1 ft.).
CAUTION
When backing up, be sure to confirm a safe distance
around your vehicle with your eyes to avoid an accident.

STARTING AND DRIVING
396
Changing the dynamic radar cruise control
mode
G31010
 1Vehicletovehicle distance control mode
2Conventional (fixed speed) cruise control mode
The dynamic radar cruise control function has two cruise
control modes.
 Vehicle −to−vehicle distance control mode for maintaining
an appropriate distance between vehicles
 Conventional (fixed speed) cruise control mode for cruising
at preset speeds
You can change the mode by using the control lever.
The two cruise control modes function differently. If you use
dynamic radar cruise control, always confirm which mode is
selected.
Vehicletovehicle distance control mode
The millimeter wave radar sensor in this system primarily
detects the reflected wave from the rear end of the vehicle
ahead of you to determine the presence of the vehicle
ahead as well as measuring the vehicletovehicle
distance. The detection range of the sensor is about 120
m (400 ft.) ahead.
When the dynamic radar 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.
CAUTION
The dynamic radar cruise control is not a
collisionavoidance system and will not prevent
accidents. The dynamic radar cruise control is a vehicle
speed control device that is intended for use only on
freeways or roads where the traffic is light or moderate.
To avoid serious injury, you must use caution and be
attentive to road and traffic conditions while using
dynamic radar cruise control.

STARTING AND DRIVING
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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
vehicletovehicle distance is maintained.
When vehicle−to−vehicle distance control mode is activated,
you must still be attentive to road and traf fic 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
vehicletovehicle 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 multiinformation 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 vehicletovehicle 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.

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Dynamic radar cruise control should not be used in the
following conditions, to avoid death or serious injury.
In bad weather (such as rain, fog, snow , sandstorms,
or when raindrops or snowflakes get in the millimeter
wave radar sensor or the cover), the
vehicletovehicle distance will not be measured
accurately.
If the wipers are operated at high speed (including the
high speed operation with the wiper lever in the
“AUTO” position), dynamic radar cruise control is
automatically cancelled. (In the case of the low speed
operation and intermittent wiper operation, it is not
cancelled.) Dynamic radar cruise control is
automatically cancelled when the measurement is
extremely unstable due to bad weather.
 On the roads in heavy traffic or at sharp bends:
As an appropriate speed cannot be maintained, death
or serious injury could result.
 On slippery road surfaces (icy or snowcovered road
surfaces):
The tires will race and you will be unable to control.On steep downhill slopes:
If there is no vehicle detected ahead, the preset speed
will be easily exceeded because of inefficient engine
braking, resulting in death or serious injury. (In this
case, automatic braking will not work.) If there is a
vehicle detected ahead, the delay in deceleration
timing could cause death or serious injury.
 When the warning tone sounds frequently (because
acceleration or deceleration was repeated or
sufficient vehicletovehicle distance was not
maintained), an appropriate vehicle speed cannot be
attained, resulting in death or serious injury.
 On roads with steep and short inclines and declines,
failure to detect the vehicle ahead will shorten the
distance between your vehicle and the vehicle ahead,
resulting in death or serious injury.