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

Rear HO2S Circuit Open/Short Inspection: Notes

  1. Disconnect the PCM connector.
  2. Disconnect the rear HO2S connector.
  3. Inspect the following wiring harnesses for an open or short circuit. (Continuity Inspection)
    Fig 1: Identifying Rear HO2S Harness Side Connector
    G04323060Courtesy of MAZDA MOTORS CORP.
    Fig 2: Identifying PCM Harness Side Connector
    G04323061Courtesy of MAZDA MOTORS CORP.
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