Circuit Open/Short Inspection

Fig 1: Identifying Variable Tumble Shutter Valve Switch Wiring Harness Side Connector Terminals

Courtesy of MAZDA MOTORS CORP.

1. Disconnect the PCM connector.
2. Inspect the following harness for an open or short wiring. (Continuity inspection)
   Fig 2: Identifying PCM Wiring Harness-Side Connector Terminals

   Courtesy of MAZDA MOTORS CORP.

Open circuit 

• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
  • Variable tumble shutter valve switch terminal A and PCM terminal 2AE
  • Variable tumble shutter valve switch terminal B and body ground

Short circuit 

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
  • Variable tumble shutter valve switch terminal A and body ground
  • Variable tumble shutter valve switch terminal B and power supply