2004 Mazda 3 i, AutomaticFACTORY OEM SERVICE PROCEDURE

Circuit Open/Short Inspection

  1. Disconnect the PCM connector.
  2. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
    Fig 1: Identifying Intake Air Temperature Sensor Terminals
    G00972606Courtesy of MAZDA MOTORS CORP.
  1. Open circuit 
    • If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
      • MAF/IAT sensor terminal D and PCM terminal 1AH
      • MAF/IAT sensor terminal E and PCM terminal 1AA
  1. Short circuit 
    • If there is continuity, there is a short circuit. Repair or replace the wiring harness.
      • MAF/IAT sensor terminal E and power supply
      • MAF/IAT sensor terminal D and power supply
      • MAF/IAT sensor terminal D and body 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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