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Home >> Mazda >> 2017 >> 5 GS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> 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 the OCV connector.
  2. Warm up the engine and idle it.
  3. Apply battery voltage to the OCV and verify that the engine idles roughly or stalls.
    • If the engine idles roughly or stalls, inspect the timing chain component (valve timing deviation).
    • If the engine does not idle roughly or stalls, go to the next step.
  4. Remove the OCV and perform spool valve operation inspection. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION .)
    • If not as specified, inspect the following:
    • If as specified, inspect the following hydraulic passages for restriction or leakage or both:
    • Oil pressure switch-OCV
    • OCV-Camshaft
    • Camshaft internal passage
  5. If they are normal, replace the camshaft pulley (with built-into variable valve timing actuator). (See VARIABLE VALVE TIMING ACTUATOR INSPECTION .)
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