2004 Mazda 3 i, AutomaticFACTORY OEM SERVICE PROCEDURE

Circuit Open/Short Inspection

  1. Disconnect the PCM connector.
  2. Disconnect the CPP switch connector.
  3. Inspect the following wiring harnesses 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.
      • CPP switch terminal B and PCM terminal 1O
      • CPP switch terminal A 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.
    • CPP switch terminal B and body GND
    • CPP switch terminal B and power supply
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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