Mazdaspeed6 L4-2.3L Turbo (2006)
Variable Valve Timing Solenoid: Testing and Inspection
OIL CONTROL VALVE (OCV) INSPECTION [L3 WITH TC]
Unable to Keep Idling
1. Remove the OCV.
2. Verify that the spool valve inside the OCV is at the maximum valve timing retard position as shown in the figure.
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If there is any malfunction, replace the OCV.
3. Connect the OCV connector.
4. Turn the ignition switch to the ON position.
5. Verify that the spool valve inside the OCV is at the maximum valve timing retard position.
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If there is any malfunction, inspect the harnesses and connectors between the OCV and PCM for a short circuit.
6. Inspect the variable valve timing actuator.
Able to Keep Idling
When using the SST (WDS or equivalent).
1. Connect the SST (WDS or equivalent).
2. Warm up the engine.
3. Using the VT DUTY1 simulation function, set the duty value of the OCV to 100% and verify that the engine idles roughly or stalls.
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If it idles roughly or stalls, verify the timing chain assembly (valve timing).
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If it does not idle roughly or stall, perform the following inspection.
1) Remove the OCV and connect the OCV connector.
2) Turn the ignition switch to the ON position.
3) Using the VT DUTY1 simulation function, change the duty value for the OCV from 0% to 100%, and then verify that the spool valve
inside the OCV operates and moves to the maximum valve timing advance position.
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If it does not operate, inspect OCV operation and the wiring harnesses and connectors between the OCV and PCM for a short circuit or
disconnection.
4) Inspect the hydraulic passage for leakage.
Hydraulic passage
Between the oil pressure switch and the OCV
Between the OCV and the camshaft
Oil passage inside the camshaft
5) If the inspected parts are normal, replace the variable valve timing actuator.
When not using the SST (WDS or equivalent)
