2004 Mazda 3 i, AutomaticFACTORY OEM SERVICE PROCEDURE

Circuit Open/Short Inspection

Fig 1: Identifying Neutral Switch Terminals
G00972598Courtesy of MAZDA MOTORS CORP.
  1. Disconnect the PCM connector.
  2. Inspect the following wiring harness for an open or short circuit. (Continuity inspection)
  1. 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 GND
  1. 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 B and GND
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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