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2008 - MX-5 - Engine

OIL CONTROL VALVE (OCV) INSPECTION [LF]

Coil Resistance Inspection

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF].)
3. Disconnect the oil control valve connector.
4. Measure the resistance between terminals A and B using an ohmmeter.

5. Connect the oil control valve connector.

Spool Valve Operation Inspection

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF].)
3. Remove the oil control valve.
4. Verify that the spool valve in the oil control valve is in the maximum valve timing retard position as indicated in the figure.

5. Verify that the battery is fully charged.
6. Apply battery positive voltage between the oil control valve terminals and verify that the spool valve operates and moves to the maximum valve timing advance position.

NOTE:

7. Stop applying battery positive voltage and verify that the spool valve returns to the maximum valve timing retard position.


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