With Bluetooth System

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable and wait for 1 min or more.
Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION .)
Disconnect the steering switch connector.
Verify the resistance between the steering switch terminals.

Fig 1: Identifying Steering Switch Connector Terminals
Courtesy of MAZDA MOTORS CORP.
- If not within the specification, replace the steering switch.
  
  Fig 2: Steering Switch Terminals Resistance Chart (1 Of 4)
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 3: Steering Switch Terminals Resistance Chart (2 Of 4)
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 4: Steering Switch Terminals Resistance Chart (3 Of 4)
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 5: Steering Switch Terminals Resistance Chart (4 Of 4)
  Courtesy of MAZDA MOTORS CORP.
Apply battery positive voltage to steering switch terminal O, and connect terminal E to ground.
Verify that the LED illuminates.
- If the LED does not illuminate, replace the steering switch.
  
  Fig 6: Connecting Terminal E To Ground
  Courtesy of MAZDA MOTORS CORP.