Circuit Open/Short Inspection

1. Disconnect the PCM connector.
2. Disconnect the neutral switch connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Fig 1: Identifying Neutral Switch And PCM Connector Terminals

Courtesy of MAZDA MOTORS CORP.

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 2AS
• 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 body ground
• Neutral switch terminal A and power supply