Lexus 2015 CT200H Owner's Manual page 389

In other situations

Even though all conceivable measures have been taken, the symptom status does not
change.
The cellular phone is not close enough to this system.
 Bring the cellular phone closer to this system.
The cellular phone is the most likely cause of the symptom.
 Turn the cellular phone off, remove and reinstall the battery pack, and then
restart the cellular phone.
 Enable the cellular phone's Bluetooth
 Stop the cellular phone's security software and close all applications.
 Before using an application installed on the cellular phone, carefully check its
source and how its operation might affect this system.
CT200h_OM_OM76134U_(U)
®
5-21. Bluetooth (Lexus Display Audio System)
®
connection.
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