See also:

USB memory/iPod operation
Connecting a USB memory or iPod enables you to enjoy music from the vehicle speakers. CAUTION Do not operate the player’s controls or connect the USB memory or iPod while driving. NOTICE Do ...

Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident. Have the vehicle inspected by your Lexus dealer immediately. ...

Initialization
Items to initialize The following items must be initialized for normal system operation in cases such as after the battery is reconnected, or maintenance is per- formed on the vehicle. ...