For Bluetooth® Unit

Switch the ignition to ACC or ON (engine off or on).
While pressing the POWER/VOLUME button, press the PRESET button 4 and FOLDER button (down) for 3 s or more.

Fig 1: POWER/VOLUME Button, PRESET Button 4 And FOLDER Button (DOWN)
Courtesy of MAZDA MOTORS CORP.
- If a DTC is displayed, repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [AUDIO UNIT] .)
  
  Fig 2: Screen Display - DTC
  Courtesy of MAZDA MOTORS CORP.
  NOTE:
  - A maximum of 12 DTCs can be displayed.
  - If several DTCs are displayed, press the TUNE button to switch the display.
  - If there are no DTCs, "No Err" is displayed.
  - If the TUNE button (down) is operated while the last DTC or "No Err" is displayed, the software version is displayed.
  - If the TUNE button (down) is operated while the software version is displayed, the connected unit information is displayed.
After completion of repairs, clear all DTCs stored in the Bluetooth® unit. (See CLEARING DTC [AUDIO UNIT] .)