BLUETOOTH Voice Quality Set Mode

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

This mode allows adjustment of the BLUETOOTH voice quality settings.
Illustrations may differ from the actual vehicle depending on the device settings and options.

HOW TO PERFORM BT VOICE QUALITY SET
1. Start the diagnostic mode (see DTC CHECK / CLEAR ).
2. Select "BT Voice Quality Set" from the "Diagnosis MENU" screen.
  
  Fig 1: Display Diagnosis MENU Screen - BT Voice Quality Set
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Select an item and adjust it as necessary.