2006 Lexus GS430 warning light

STARTING AND DRIVING
352
PARKING BRAKE
G31037
 1U.S.A. 2Canada
To set: Hold the regular brake pedal down with your right
foot. Push down the parking brake pedal with your left
foot.
To release: Hold the regular brake pedal down with your
right foot and push the parking brake pedal with your left
foot. When you lift your left foot, the parking brake pedal
will follow it to the released position.
Before leaving your vehicle, firmly apply the parking brake.
To remind you that the parking brake is set, the parking brake
reminder light in the instrument cluster remains on until you
release the parking brake. The buzzer will remind you to release the parking brake when
the vehicle speed rises above 5 km/h (3mph) with the parking
brake is applied. At this time the master warning light blinks
and the message “PARK BRAKE” appears on the
multi−information display.
CAUTION
Before driving, make sure the parking brake is fully
released
and that the parking brake reminder light is off.

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
379
When snowflakes or mud gets on the sensors
G31062
 1
Multiinformation display 2Screen
If foreign matter gets on the sensors and the intuitive
parking assist cannot detect the object properly, the
above message appears. At this time, the vehicle symbol
and the indicator bars corresponding to the faulty
sensors flash for about 7 seconds and 2 beeps sound 5
times.
After about 7 seconds, the sensor indicator bars will
cease flashing, however will stay lit until the affected
sensor is cleaned. Furthermore, the vehicle symbol will
continue to flash until the affected sensor is cleaned.
The above illustration shows the sensor on the left front of the
vehicle malfunctioning.
If the failure warning does not go off even after the foreign
matter is removed, the intuitive parking assist may be
malfunctioning. Have it checked by your Lexus dealer. When the sensor is malfunctioning
G31063
 1
Multiinformation display 2Screen
If the sensor cable is broken and the intuitive parking
assist cannot detect the object properly, the above
message appears. At this time, the indicator bars
corresponding to the faulty sensor flash for about 7
seconds and 2 beeps sound 5 times.
The indicator bars continue lighting after flashing.
The above illustration shows the sensor on the right rear of the
vehicle malfunctioning.
If this message appears, have the sensor checked by your
Lexus dealer.

STARTING AND DRIVING
393
Setting operation
G31164
Each function is described below.
1
Setting at a desired speed.
The transmission must be in the “D” position, or the shift range
position must be “4” (fourth range), “5” (fifth range) o\
r “6” (sixth
range) in the “S” mode before you set the cruise control speed.
Bring the vehicle to the desired speed, press the control lever
downward in the “– SET” direction and release it. This sets the
vehicle at that speed. Now you may take your foot off the
accelerator pedal. If you need acceleration − for example,
when passing − depress the accelerator pedal enough for the
vehicle to exceed the set speed. When you release the
accelerator p edal, the vehicle will return to the speed set prior
to the acceleration.
2 Cancelling the preset speed
You can cancel the preset speed by doing any of the following:
a. Pulling the control lever in the ”CANCEL” direction.
b. Depressing the brake pedal.
c. Pushing the “ON −OFF” button.
If the vehicle speed falls below about 40 km/h (25 mph), the
preset speed will be automatically cancelled.
If the vehicle speed drops 16 km/h (10 mph) below the preset
speed, the preset speed will also automatically be cancelled.
If the slip indicator light blinks and a warning tone sounds, the
preset speed will be automatically cancelled.
If the preset speed automatically cancels out for other than the
above reasons, do not operate the cruise control. Although it
is no problem to continue driving, have your vehicle checked
by your Lexus dealer at the earliest opportunity.
3 Resetting to a faster speed
Press the control lever upward in the “+ RES” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held upward, the vehicle will gradually gain
speed.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
increased 1.6 km/h (1 mph) each time by pressing the control
lever upward in the “+ RES” direction quickly within 0.6
seconds.

STARTING AND DRIVING
394However, a quicker way to reset is to accelerate the vehicle
and then press the control lever downward in the “– SET”
direction.
4
Resetting to a slower speed
Press the control lever downward in the “– SET” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held downward, the vehicle speed will
gradually decrease.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
lowered 1.6 km/h (1 mph) each time by pressing the control
lever downward in the “– SET” direction quickly within 0.6
seconds.
However, a quicker way to reset is to depress the brake pedal
and then press the control lever downward in the “– SET”
direction.
With the cruise control on, even if you downshift the
transmission from the “D” position or “6” (sixth range) to the “5”\
(fifth range), or from the “D” position or “5” (fifth ran\
ge) to the
“4” (fourth range), engine braking will not be enabled because
the cruise control is not cancelled. To decrease the vehicle
speed, reset to a slower speed with the cruise control lever or
depress the brake pedal. If you use the brake pedal, cruise
control is cancelled.
5 Resuming the preset speed
If the preset speed is cancelled by pulling the control lever, by
depressing the brake pedal or vehicle stability control
activation, pushing the lever up in the “+ RES” direction will
restore the speed set prior to cancellation. However, once the
vehicle speed falls below about 40 km/h (25 mph), the preset
speed will not be resumed.
Cruise control failure warning
If the “CRUISE” indicator light in the instrument cluster flashes
when using the cruise control, push the “ON −OFF” button to
turn the system off and then push it again to turn it on.
If any of the following conditions then occurs, there is some
trouble in the cruise control system.
 The indicator light does not come on.
 The indicator light flashes again.
 The indicator light goes out after it comes on.
If this is the case, contact your Lexus dealer and have your
Lexus inspected.

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395
DYNAMIC RADAR CRUISECONTROL
The vehicles with precollision system are equipped with
dynamic radar cruise control.
Dynamic radar cruise control allows you to drive at a
selected cruising speed over about 45 km/h (28 mph) with
your foot off the accelerator pedal, maintaining an
appropriate vehicletovehicle distance.
CAUTION
Do not rely excessively on dynamic radar cruise control
in order to avoid serious injury or death, or to prevent
accidents or to control the vehicle’s speed in
emergency situations. Do not use cruise control except
in appropriate road and traffic conditions. Always drive
carefully and attentively. Before using dynamic radar
cruise control, read and understand the following
instructions.
G31009
 1 Multiinformation display
2Master warning light
3“CRUISE” indicator light
4Distance switch
(for changing vehicletovehicle distance)
5 Cruise control switch

STARTING AND DRIVING
402(c) Setting operation
G31014

Each function is described below.
1
Setting the desired speed
The transmission must be in “D”, “6” (sixth range), “5”\
(fifth
range) or “4”(fourth range) before you set the cruise control
speed. After bringing the vehicle to
the desired speed, press the
control lever downward in the “– SET” direction and release it.
This sets the vehicle at that speed. At this time, the
multi−information display indicates settings such as the preset
vehicle speed, whether a vehicle is present ahead and
selected vehicle −to−vehicle distance. If there is no vehicle
detected ahead, the dynamic radar cruise control screen does
not display the vehicle ahead. At this time, you may take your
foot off the accelerator pedal. If you need to accelerate − for
example, when passing − depress the accelerator pedal
enough for the vehicle to exceed the preset speed. When you
release the accelerator pedal, the vehicle will return to the
control prior to acceleration.
You cannot set a desired speed if the master warning light
comes on, the warning tone sounds and the multi− information
display indicates a warning message such as “CRUISE NOT
AVAILABLE”, “CLEAN RADAR SENSOR” or “CHECK
CRUISE SYSTEM”. If any of the above messages appears on
the display, see “Vehicle −to−vehicle distance control mode
failure warning” on page 410.
If you turn off the “ON−OFF” button while the warning message
is displayed, the warning message turns off and the
multi−information display switches to another screen. If no
warning message appears on the display, when you turn the
“ON−OFF” button on again, the setting can be made.
You can change the dynamic radar cruise control screen to
another screen even while the warning message is displayed.