Variable Tumble Shutter Valve Switch Inspection

Connect the M-MDS to the DLC-2.
Switch the ignition to ON.
Verify that the voltage (M-MDS PID: IMRC_POS) within the specification. (See PCM INSPECTION ).
- If not as specified, replace the intake manifold.
  (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION ).
  
  Fig 1: Identifying DLC-2
  Courtesy of MAZDA MOTORS CORP.