Lexus 2004 LS430 Owner's Manual page 371

In the following cases, the dynamic radar/laser cruise
control switches to the "RADAR READY" mode:
Dynamic radar cruise control—
D The driving pattern selector switch is changed to the
"normal" or "power" position.
D The wipers are stopped or are switched to low speed or
intermittent operation. (Including intermittent and stopped
wipers in the "AUTO" position)
In the above conditions, press the control lever upward in the
"RES/ACC" direction and release it. The dynamic radar cruise
control will be restored, however, even after the weather
clears, if the setting operation cannot be performed or if the
warning message still appears, the system might have
malfunctioned. Although it is no problem to continue driving,
contact your Lexus dealer.
STARTING AND DRIVING
Dynamic laser cruise control—
D The driving pattern selector switch is changed to the
"normal" or "power" position.
D The wipers are stopped or are switched to intermittent
operation. (Including intermittent and stopped wipers in the
"AUTO" position)
D No direct sunlight from the front
In the above conditions, press the control lever upward in the
"RES/ACC" direction and release it. The dynamic laser cruise
control will be restored, however, even after the weather
clears, if the setting operation cannot be performed or if the
warning message still appears, the system might have
malfunctioned. Although it is no problem to continue driving,
contact your Lexus dealer.
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