See also:

CD changer operation
(a) Inserting discs The “ENGINE START STOP” switch must be in ACCESSORY or IGNITION ON mode. Your CD changer can store up to 6 discs. You can set a disc at the lowest empty disc number. Settin ...

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. ...

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. ...