Circuit Open/Short Inspection

1. Disconnect the PCM connector.
2. Inspect the following wiring harness for an open or short circuit. (Continuity inspection)

Open circuit 

• If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
  • Neutral switch terminal A and PCM terminal 1S
  • Neutral switch terminal B and body ground

Short circuit 

• If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.
  • Neutral switch terminal A and power supply
  • Neutral switch terminal A and body ground
  • Neutral switch terminal B and power supply
    Fig 1: Identifying Neutral Switch Connector Terminals

    Courtesy of MAZDA MOTORS CORP.