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Home >> Mazda >> 2004 >> 3 s, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> Middle Heated Oxygen Sensor (Ho2S) Inspection [CALIFORNIA Emission Regulation Applicable Model] >> Middle HO2S Circuit Open/Short Inspection (Heater) >> Notes
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Middle HO2S Circuit Open/Short Inspection (Heater): Notes

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