Mazdaspeed6 L4-2.3L Turbo (2006)
5. Increase the oil control valve (OCV) duty value and verify that the engine idles roughly or stalls.
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If as specified, inspect the timing belt component (valve timing deviation).
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If not as specified, go to the next step.
6. Remove the oil control valve (OCV) while the connector is connected.
7. Turn the ignition switch to the ON position.
8. Select VT DUTY1 PID.
9. Increase the oil control valve (OCV) duty value and verify that the spool valve operates in the advance direction
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If as specified, inspect the following hydraulic passage for clogging and/or leakage.
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Oil pressure switch - oil control valve (OCV)
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Oil control valve (OCV) - camshaft
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Camshaft internal passage
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If not as specified, inspect the following:
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Oil control valve (OCV) operation
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Harness and connectors for open or short circuit (Oil control valve (OCV) - PCM terminal 48)
10. If they are normal, replace the intake camshaft pulley (with a built-in variable valve timing actuator).
If simulation function of WDS or equivalent is not used:
11. Disconnect the oil control valve (OCV) connector.
12. Warm up the engine and idle it.
13. Apply battery voltage to the oil control valve (OCV) and verify that the engine idles roughly or stalls.
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If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation).
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If the engine does not idle roughly or stalls, go to the next step.
14. Remove the oil control valve (OCV) and perform the spool valve operation inspection.
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If not as specified, inspect the following:
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Oil control valve (OCV)
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Harnesses and connectors between oil control valve (OCV) and PCM have an open or short circuit.
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If as specified, inspect the following hydraulic passages for clogging or leakage or both:
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Oil pressure switch - oil control valve (OCV)
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Oil control valve (OCV) - camshaft
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Camshaft internal passage
15. If they are normal, replace the camshaft pulley (with built-in variable valve timing actuator).
