Rear 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 following parts:
1. High-mount brake light. See HIGH-MOUNT BRAKE LIGHT REMOVAL/INSTALLATION )
2. Rear seat cushion. See REAR SEAT CUSHION REMOVAL/INSTALLATION )
3. Rear side seat back. See REAR SIDE SEAT BACK REMOVAL/INSTALLATION .
4. C-pillar trim. See C-PILLAR TRIM REMOVAL/INSTALLATION .
5. Rear package trim. See REAR PACKAGE TRIM REMOVAL/INSTALLATION .
6. Rear speaker. See REAR SPEAKER REMOVAL/INSTALLATION .
Verify the resistance between the rear speaker terminals.
- If not within the specification, replace the rear speaker
  
  Fig 1: Terminal Resistance Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Identifying Rear Speaker Connector Terminal
  Courtesy of MAZDA MOTORS CORP.
Resistance

2.24-3.96 ohms