Toyota Lexusc Owner's Handbook Manual page 166

To operate the moon roof, the ignition key must be in the "ON"
position.
If the moon roof is left open when you turn the ignition key to
the "ACC" or "LOCK" position and open the driver's door, a
buzzer will remind you to close the moon roof.
Key off operation: Even if the ignition key is turned to the
"ACC" or "LOCK" position, the moon roof can be operated until
either front door is opened (or for 43 seconds).
EXTERIOR EQUIPMENT
Operating the moon roof from outside the
vehicle
The moon roof can be operated using an ignition key.*
NOTE:
* This feature can be deactivated.
Ask your Lexus dealer for details.
" Close " Open
Insert the ignition key into the key hole on the driver's
door.
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