Circuit Open/Short Inspection

Fig 1: View Of Variable Tumble Shutter Valve Switch Wiring Harness-Side Connector

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: View Of PCM Wiring Harness-Side Connector

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