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Home >> Mazda >> 2004 >> 6 i, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine Control System (L3) >> Engine Control System Operation Inspection >> Variable Valve Timing Control System Operation Inspection >> When idling can be continued
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When idling can be continued

  1. Disconnect oil control valve (OCV) connector.
  2. Warm up the engine and idle it.
  3. Apply battery voltage to the oil control valve (OCV) and verify that the engine idles roughly or stalls.
    • If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation).
    • If the engine does not idle roughly or stalls, go to next step.
  4. Remove the oil control valve (OCV) and perform spool valve operation inspection. (See OIL CONTROL VALVE (OCV) INSPECTION [L3] .)
    • If not as specified, inspect the following:
      • Oil control valve (OCV)
      • Harnesses and connectors between oil control valve (OCV) and PCM open or short.
    • If as specified, inspect the following hydraulic passages for clogging or leakage or both:
      • Oil pressure switch - oil control valve (OCV)
      • Oil control valve (OCV) - camshaft
      • Camshaft internal passage
  5. If they are okay, replace the camshaft pulley (with built-in variable valve timing actuator).
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