Starter Interlock Switch Removal/Installation

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Disconnect the starter interlock switch connector.
Remove the starter interlock switch using the following procedure:
1. Detach hook A in the direction of the arrow shown in the figure.
  
  Fig 1: Removing Starter Interlock Switch
  Courtesy of MAZDA MOTORS CORP.
2. Slide the starter interlock switch in the direction of the arrow shown in the figure.
  
  Fig 2: Sliding Starter Interlock Switch
  Courtesy of MAZDA MOTORS CORP.
3. Remove the starter interlock switch from the clutch pedal.
Fig 3: Removing Starter Interlock Switch From Clutch Pedal
Courtesy of MAZDA MOTORS CORP.
Install the starter interlock switch using the following procedure:
1. Insert hook B of a new starter interlock switch into the clutch pedal hole.
  
  Fig 4: Installing Starter Interlock Switch
  Courtesy of MAZDA MOTORS CORP.
2. While pressing the starter interlock switch against the clutch pedal, slide the starter interlock switch until hook A is locked in the direction of the arrow shown in the figure.
Fig 5: Sliding Starter Interlock Switch
Courtesy of MAZDA MOTORS CORP.
Fully depress the clutch pedal in the direction of arrow, and verify that a click sound from the starter interlock switch is heard.

Fig 6: Fully Depressing Clutch Pedal
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
Fully depress the clutch pedal, and verify that the engine starts.