Tweeter Inspection

Disconnect the negative battery cable.
Remove the inner garnish. See INNER GARNISH REMOVAL/INSTALLATION .
Remove the tweeter. See TWEETER REMOVAL/INSTALLATION .
Verify the resistance between tweeter terminals.
- If not within the specification, replace the tweeter.
  
  Fig 1: Terminal Resistance Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Identifying Tweeter Connector Terminal
  Courtesy of MAZDA MOTORS CORP.
Resistance

Without Bose®: 3.4-4.6 ohms

With Bose®: 3.06-3.94 ohms