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Home >> Mazda >> 2003 >> 6 i, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls [Self-Diagnostics 2.3L] >> System Tests >> 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 engine and let idle.
  3. Apply battery voltage to OCV and verify engine idles roughly or stalls.
    • If engine idles roughly or stalls, inspect timing belt component (valve timing deviation).
    • If engine does not idle roughly or stalls, go to next step.
  4. Remove OCV and perform spool valve operation inspection. OIL CONTROL VALVE - MAZDA6 & MIATA ONLY under VARIABLE VALVE TIMING CONTROL in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If not as specified, inspect following:
    • OCV
    • Harnesses and connectors between OCV and PCM for open or short circuit
    If as specified, inspect following hydraulic passages for clogging or leakage or both
    • Oil pressure switch to OCV
    • OCV to camshaft
    • Camshaft internal passage
  5. If all passages are okay, replace camshaft pulley (with built-in variable valve timing actuator).
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