OIL CONTROL VALVE (OCV) INSPECTION [ZJ, ZY]

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Coil resistance inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the OCV connector.

3.  Measure the coil resistance between terminals A and B using a tester.

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•  If not within the specification, replace the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)

4.  Connect the OCV connector.

Spool Valve Operation Inspection

1.  Disconnect the negative battery cable.

2.  Remove the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)

3.  Verify that the spool valve inside the OCV is at the maximum valve timing retard position as shown in the figure.

•  If it cannot be verified, replace the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)

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4.  Verify that the battery is fully charged. (See BATTERY INSPECTION [ZJ, ZY].)

Note

•  When applying battery positive voltage between the oil control valve terminals, the connection of the negative and positive cable can be either the A or B terminal.

5.  Apply battery positive voltage between oil control valve terminals A and B, and verify that the spool valve operates and moves to the maximum valve timing advance position.

•  If there is any malfunction, replace the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)

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

•  If it cannot be verified, replace the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)

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7.  Install the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [ZJ, ZY].)