See also:

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. ...

Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning message and light go off. ...

Using the audio system
Audio system - Vehicles with a navigation system. Owners of models equipped with a navigation system should refer to the “Navigation System Owner’s Manual”. - Vehicles without a navigation s ...