Lexus RX400h2006 Owner's Manual page 466

(a) Turning the system on
To operate the conventional cruise control mode, press the
"ON−OFF" button. This turns the system on. The "CRUISE"
indicator light in the instrument cluster comes on and "RADAR
READY" appears on the multi−information display. Push the
lever in the "MODE" direction for longer than 1 second to
change to conventional cruise control mode. You can now set
your desired cruising speed. Pressing the "ON−OFF" button
again will turn the system completely off.
However, once the vehicle−to−vehicle distance control mode
activates and is used, the system cannot be changed to the
conventional cruise control mode using the above operation.
To change the mode, you must turn this system off and then on
again. Next push the lever in the "MODE" direction for longer
than about 1 second.
To change to the vehicle−to−vehicle distance control mode
from the conventional cruise control mode, push the lever in
the "MODE" direction for longer than about 1 second.
STARTING AND DRIVING
CAUTION
To avoid accidentally engaging the cruise control, keep
the "ON−OFF" button off when not using dynamic laser
cruise control.
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