cruise control Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2005 PROD. (OM30649U) User Guide
[x] Cancel search | Manufacturer: LEXUS, Model Year: 2006, Model line: GS430, Model: Lexus GS430 2006Pages: 622
Page 413 of 622
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392
CRUISE CONTROL
The cruise control allows you to cruise the vehicle at a
desired speed over 40 km/h (25 mph) with your foot off the
accelerator pedal.
Your 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, a great
speed change will occur so it is better to drive without the cruise
control.
When the 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
To help maintain maximum control of your vehicle,
do not use the cruise control when driving in heavy
or varying traffic, or on slippery (rainy, icy or
snow covered) or winding roads.
Avoid vehicle speed increases when driving
downhill. If the vehicle speed is too fast in relation to
the cruise control set speed, cancel the cruise
control then downshift the transmission to use
engine braking to slow down.
Turning the system on
G31163
To operate the cruise control, push the “ON −OFF” button. This
turns the system on. The indicator light in the instrument
cluster shows that you can now set your desired cruising
speed. Another push on the button will turn the system
completely off.
When the engine switch is turned off, the “ON −OFF” button is
also automatically turned off. To use the cruise control again,
push the “ON −OFF” button again to turn it on.
CAUTION
To avoid accidental cruise control engagement, keep
the “ON OFF” button off when not using the cruise
control.
Page 414 of 622
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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.
Page 415 of 622
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 pre collision 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 vehicle to vehicle 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 Multi information display
2Master warning light
3“CRUISE” indicator light
4Distance switch
(for changing vehicle to vehicle distance)
5 Cruise control switch
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396
Changing the dynamic radar cruise control
mode
G31010
1Vehicle to vehicle 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.
Vehicle to vehicle 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 vehicle to vehicle
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
collision avoidance 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.
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397
(a) Dynamic radar cruise control operations
G31012
The dynamic radar cruise control function operates
automatically and depending on whether a vehicle is
detected ahead
may change the speed of your vehicle as
follows: If no vehicle is running ahead of you:
1
Cruising at a fixed speed: If there is no vehicle detected
ahead, your cruising speed is maintained at the preset
speed from about 45 km/h (28 mph) to about 135 km/h (85
mph). The preset speed is displayed in the
multi−information display. For the vehicle speed setting,
see “Setting operation ” on page 402.
If a vehicle is detected ahead of you:
2 Deceleration cruising function: If a slower moving
vehicle is detected ahead of you, your vehicle cruising
speed decreases within the range of about 40 km/h (25
mph) to about 135 km/h (85 mph). The multi− information
display shows the preset speed, the detected vehicle
ahead and selected vehicle− to−vehicle distance. If your
vehicle gets closer to the vehicle ahead because of
insufficient automatic deceleration, then the warning tone
warns you to also manually apply brakes.
3 Follow up cruising function: After deceleration, your
vehicle cruising speed changes in proportion to the speed
of the vehicle ahead to maintain an appropriate distance
from your vehicle to the vehicle ahead. The
vehicle −to−vehicle distance can be changed. For details,
see “Changing vehicle −to−vehicle distance setting” on
page 406.
4 Acceleration cruising function: If the vehicle ahead
changes lanes, your vehicle cruising speed will be
gradually increased up to the preset speed, and your
vehicle resumes fixed− speed cruising.
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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
vehicle to vehicle 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
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.
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399
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
vehicle to vehicle 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 snow covered 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 vehicle to vehicle 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.
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400
G31013
Dynamic radar cruise control should not be used in
circumstances which are inappropriate for any cruise control
such as entering freeway on−ramps or off −ramps.
CAUTION
The dynamic radar cruise control should not be used
when exiting from, or when entering or merging onto a
freeway. When you are following a slower moving
vehicle and exiting, the sensor does not detect the
vehicle and will accelerate to preset speed.
G31015
CAUTION
If other vehicles are driving outside of the millimeter
wave radar detection range, a delay in the detection
of the vehicle cutting in at short range or detection
failure of the motorcycle running on the side of the
same lane will occur. In this case, the dynamic radar
cruise control system will not function properly.
When a slower vehicle in front of you leaves the lane,
the dynamic radar cruise control will no longer detect
a vehicle ahead and will attempt to accelerate the
vehicle to the faster preset speed.
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401
(b) Turning the system on
G31011
To operate the dynamic radar cruise control, push the
“ON−
OFF” button. This turns the system on. When the
“CRUISE” indicator light in the instrument cluster comes on
and “RADAR READY” appears on the multi−information
display, you can now set your desired cruising speed and
vehicle −to−vehicle distance. Pushing the “ON −OFF” button
again will turn the system completely off and “CRUISE OFF”
will appear on the multi −information display.
When the engine switch is turned off, the system is also
automatically turned off. To use the dynamic radar cruise
control again, push the “ON −OFF” button again to turn it on.
When the engine switch is turned off, all the preset data is
cleared. When you use the dynamic radar cruise control again,
you need to reset the data. The multi−
information display will return to the
vehicle −to−vehicle distance screen about 6 seconds after the
vehicle− to−vehicle distance screen has been changed to
another screen.
CAUTION
To avoid accidentally engaging the cruise control, keep
the “ON OFF” button off when not using the dynamic
radar cruise control.