Rear Door Speaker Inspection

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable.
Remove the rear door trim. See REAR DOOR TRIM REMOVAL/INSTALLATION .
Remove the rear door speaker. See REAR DOOR SPEAKER REMOVAL/INSTALLATION .
Verify the resistance between the rear door speaker terminals.
- If not within the specification, replace the rear door speaker.
  
  Fig 1: Terminal Resistance Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Identifying Rear Door Speaker Connector Terminal
  Courtesy of MAZDA MOTORS CORP.
Resistance

Without Bose®: 3.4-4.6 ohms

With Bose®: 1.83-2.47 ohms