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Home >> Mazda >> 2006 >> MX-5 Miata Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Front Heated Oxygen Sensor (Ho2S) Inspection >> Front HO2S Circuit Open/Short Inspection >> Notes
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Front HO2S Circuit Open/Short Inspection: Notes

  1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION  .)
  2. Disconnect the front HO2S connector.
  3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
    Fig 1: Identifying Front HO2S Terminals
    G04323055Courtesy of MAZDA MOTORS CORP.
    Fig 2: Identifying PCM Harness Side Connector
    G04323056Courtesy of MAZDA MOTORS CORP.
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