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Open circuit

If there is no continuity, there is an open circuit. Repair or replace the harness.
- Variable tumble shutter valve switch terminal A and PCM terminal 2AU
- Variable tumble shutter valve switch terminal B and PCM terminal 2AY
- Variable tumble shutter valve switch terminal C and PCM terminal 2AE
  
  Fig 1: PCM Connector Terminal Identification
  Courtesy of MAZDA MOTORS CORP.