Lexus GS430 User Manual page 445

(b) Setting operation
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"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 in the conventional cruise control mode of the dynamic
radar cruise control.
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 and the multi−information
display shows the preset speed. 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
speed set prior to acceleration.
STARTING AND DRIVING
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 "CHECK
CRUISE SYSTEM". If this messages appears on the display,
see "Conventional cruise control mode failure warning" on
page 423.
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. When
you turn the "ON−OFF" button on again, the warning message
comes back on the display. If no warning message appears on
the display, the setting can be made.
You can change the dynamic radar cruise control screen to
another screen even while the warning message is displayed.
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 cancelled by a. or b., the multi−information displays shows
nothing and the conventional cruise control enters the ready
mode.
If cancelled by c., the "CRUISE" indicator light goes off in the
instrument cluster and the multi−information display shows
"CRUISE OFF". In this case, the preset speed data is cleared,
and you must set the speed from the beginning.
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