sensor Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2005 PROD. (OM30649U) Owner's Guide

STARTING AND DRIVING
365
In the power mode, the “ECT PWR” light in the instrument
cluster is on and the most suitable shift pattern is selected
depending on the driver’s operation of accelerator and brake
pedal and on the vehicle condition. See “Automatic shifting
point change control” on page 356.
To return to the normal mode, push the
driving pattern selector
switch lightly on the “SNOW” side.
Snow mode: For slippery road surfaces such as in snow. In
this mode, the spinning of the rear wheels is controlled
appropriately.
When you push the driving pattern selector switch on the
“SNOW” side, the snow mode is turned on and the ”ECT
SNOW” light in the instrument cluster comes on.
To return to the normal mode, push the driving pattern selector
switch on the “SNOW” side again.
When you turn the engine switch off in the snow mode, the
electronic throttle control system automatically changes to the
normal mode.
INTUITIVE PARKING ASSIST
G31049
The intuitive parking assist is a warning system used
when parking the vehicle at low speed (e.g. into a garage).
It uses an ultrasonic sensor, which checks the
approximate distance to an obstacle. It will inform you of
the approximate distance to an obstacle by displaying
information on the multiinformation display and the
screen, and with beeping sounds.

STARTING AND DRIVING
366
1Dual sensors
There are four of these steering guidance sensors installed in
the front bumper.
Steering guidance means that when an obstacle is inspected,
not only is the distance estimated, this function judges whether
collision with the obstacle within detection range is avoidable
if the vehicle is steered in a certain direction, and informs the
driver. There will be no warning if it judges that there is no
possibility of collision with the obstacle within detection range.
(See page 369.)
2 Rear corner sensors
There is one of these installed on each corner of the rear
bumper, they inspect obstacles and will sound a warning
depending on the distance to the obstacle. (See page 373.)
3 Back sensors
There are two of these installed near the center of the rear
bumper, they inspect obstacles and will sound a warning
depending on the distance to the obstacle. (See page 374.)
G31050
To use the intuitive parking assist, push the main switch
in the switch box with the engine switch in “IGON” mode.
Pushing the main switch again will turn the intuitive
parking assist off.
When you push the main switch, the indicator light in the
instrument cluster comes on and a beep sounds for one
second, indicating that the intuitive parking assist is turned on.
The intuitive parking assist will remain on even after turning the
engine switch to “OFF” and then to “IG−ON” mode with the
main switch on. However, a beep does not sound at this time.
If an error is detected in the intuitive parking assist while
self−checking, beeps sound and a warning appears in the
multi−information display and on the screen. For details, see
“Intuitive parking assist failure warning” on page 378.

STARTING AND DRIVING
368
Indicators and steering guide symbol
G31053
 1Detection by dual sensors
2Detection by rear corner sensors
3Detection by back sensors
4Steering guide symbol (See page 371)
The approximate distance to the obstacle is shown with up to
4 bars on the front, front corners and rear of the vehicle and up
to 3 bars on the rear corners of the vehicle.
CAUTION
To avoid an accident or injury, observe the following
instructions, and then drive slowly using the brakes
while confirming a safe distance around your vehicle
with your eyes.
 The sensor detection range is limited around the
bumper. Be sure to confirm safety outside sensor
detection with your eyes. For the sensor detection
range, see page 376.
 It might take time for the sensors to detect the
obstacle.
 Depending on the shape of the obstacle, indicators or
beeps may not warn you properly, and the detection
range may also be shortened.
 It might be difficult to hear beeps due to the volume
of audio or air flow noise of air conditioning.

STARTING AND DRIVING
369
Dual sensors
G31054
(A) Collision will be unavoidable: Collision with the
detected obstacle cannot be avoided even by changing the
steering.
(B) Collision will be avoided by changing the steering:
Collision with the obstacle can be avoided by changing the
steering.
(C) Collision will be avoide d with the present steering
angle: Even if you continue moving at the present steering
angle, the distance to the obstacle within sensor detection
range will not be less than about 25 cm (0.8 ft.).
The dual sensors detect an obstacle in front of the vehicle
or at an angle to the front of the vehicle, and estimate the
distance to the obstacle and also the steering angle
required. They will evaluate which of the above 3
conditions is applicable. The selector lever must be in any position other than “P” or “R”
for these sensors to operate, however the obstacle at an angle
to the front of the vehicle will also be detected while the selector
lever is in “R”.
CAUTION
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.
The steering guidance may not operate properly in the
following conditions:
 Tires other than those of Lexus genuine size are
installed.
 The steering sensor information cannot be received
properly. (See “Intuitive parking assist failure warning”
on page 378.)

STARTING AND DRIVING
372
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. To avoid an
accident or injury, be sure to confirm a safe distance
around your vehicle with your eyes and drive slowly.
(C) Collision will be avoide d with the present steering
angle
G31057
 3 About 50 cm (1.5 ft.) to about 100 cm (3.0 ft.)
4About 37.5 cm (1.1 ft.) to about 50 cm (1.5 ft.)
5About 25 cm (0.8 ft.) to about 37.5 cm (1.1 ft.)

STARTING AND DRIVING
373
1Multiinformation display:
The indicator bars will come on depending on the
distance to the obstacle.
2Screen:
The indicator bars will come on in green depending on the
distance to the obstacle. In addition, the current direction
of the tires is also indicated in 3 stages.
Beeps:
Beeps will not sound.
CAUTION
To avoid an accident or injury, observe the following.
When you move your vehicle, be sure to confirm a safe
distance around your vehicle with your eyes and drive
slowly.
 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 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.
Rear corner sensors
G31058
 3 About 37.5 cm (1.1 ft.) to about 50 cm (1.5 ft.)
4About 25 cm (0.8 ft.) to about 37.5 cm (1.1 ft.)
5Less than about 25 cm (0.8 ft.)

STARTING AND DRIVING
374The rear corner sensor only operates when the
transmission is in “R”, it checks the approximate distance
to obstacles at an angle to the rear of the vehicle, and
sounds a warning depending on the distance.
1
Multiinformation display:
The indicator bars will come on depending on the
distance to the obstacle and will flash when the distance
between the vehicle and the obstacle is less than about
25 cm (0.8 ft.).
2 Screen:
The indicator bars will come on in 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 bars 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.).
CAUTION
When backing up, be sure to confirm a safe distance
around your vehicle with your eyes to avoid an accident.
Back sensors
G31059
 3
About 60 cm (2.0 ft.) to about 150 cm (5.0 ft.)
4About 45 cm (1.4 ft.) to about 60.0 cm (2.0ft.)
5About 35 cm (1.1 ft.) to about 45.0 cm (1.4 ft.)
6Less than about 35 cm (1.1 ft.)

STARTING AND DRIVING
375
The back sensor only operates when the transmission is
in “R”, it checks the approximate distance to obstacles
close to the rear of the vehicle, and sounds a warning
depending on the distance.
1
Multiinformation display:
The indicator bars will come on depending on the
distance to the obstacle and will flash when the distance
between the vehicle and the obstacle is less than about
35 cm (1.1 ft.).
2 Screen:
The indicator bars will come on 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 bars 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.
Numerous obstacles are detected on the front
and rear of the vehicle simultaneously
G31060
When obstacles are detected on the front and rear of the
vehicle at the same time; the multiinformation display
and screen illuminate their relevant indicator bars. And
beeps are as follows:
1
Obstacles detected on the front and rear of the
vehicle are not in areas where continuous beeping
should sound:

STARTING AND DRIVING
376The warning for the obstacle closer to the vehicle will be
issued.
The above illustration indicates the obstacle detected
by the back sensors is closer to the vehicle. So, the warning for
the obstacle detected by the back sensors will be given.
2 The obstacle detected on the front or rear of the
vehicle is in an area where continuous beeping
should sound:
If the possibility of collision with the obstacle is high as shown,
the system warns the driver by continuous beeping (repeating
6 intermittent beeps and one longer beep as one cycle).
3 Both obstacles detected on the front and rear of the
vehicle are in areas where continuous beeping
should sound:
If the possibility of collision with the obstacles is very high as
shown, the system warns the driver by continuous beeping
(repeating 2 quick beeps and one longer beep as one cycle).
CAUTION
It might be difficult to hear beeps due to the volume of
audio or air flow noise of air conditioning. To avoid an
accident or injury, drive slowly using the brakes while
confirming a safe distance around your vehicle with
your eyes.
Detection range of sensors*
G31061
 1 About 3 m (10 ft.) 2About 1 m (3 ft.)
3About 1m 50 cm (5 ft.) 4About 50 cm (1.5 ft.)
The sensor detection range is limited around the bumper.
Be sure to confirm a safe distance around your vehicle
and drive slowly.

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.