Front Door Speaker Inspection

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the front door trim. (See FRONT DOOR TRIM REMOVAL/INSTALLATION .)
Disconnect the front door speaker connector. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION .)
Inspect the resistance between front door speaker terminals B and C.
Front door speaker resistance

Without Bose®: 3.4-4.6 ohms

With Bose®: 1.25 ohms

Fig 1: Checking Front Door Speaker Resistance
Courtesy of MAZDA MOTORS CORP.
- If not within the specification, replace the front door speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION .)