Buckle Switch Inspection: Driver-side

WARNING: This page is about a different car, the 2014 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Switch the ignition off.
Disconnect the negative battery cable and wait for 1 min or more . (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Remove the front seat. (See FRONT SEAT REMOVAL/INSTALLATION ,)
Remove the front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION .)
Inspect for continuity between the buckle switch terminals using a tester.
- If not as indicated in the table, replace the front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION .)
  
  Fig 1: Buckle Switch Continuity Reference Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Buckle Switch - Circuit Diagram
  Courtesy of MAZDA MOTORS CORP.