With Bose®

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the front door trim. (See FRONT DOOR TRIM REMOVAL/INSTALLATION .)
Verify that the resistance between the tweeter terminals is as indicated in the table.

Fig 1: Checking Resistance Between Tweeter Terminals (With Bose®)
Courtesy of MAZDA MOTORS CORP.
- If not as indicated in the table, replace the tweeter.
Fig 2: Tweeter Terminals Resistance Chart (With Bose®)
Courtesy of MAZDA MOTORS CORP.