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Circuit Open/Short Inspection

Disconnect the PCM connector.
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.