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Home >> Mazda >> 2009 >> 5 Sport, 2.3 L, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (L3) >> Heated Oxygen Sensor (Ho2S) Inspection [L3] >> HO2S Circuit Open/Short Inspection (Heater) >> Notes
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HO2S Circuit Open/Short Inspection (Heater): Notes

Fig 1: Identifying PCM And Heated Oxygen Sensor Connector Terminals
G05543257Courtesy of MAZDA MOTORS CORP.
  1. Disconnect the PCM connector.
  2. Disconnect the HO2S connector.
  3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
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