Engine Oil Control Valve: Testing and Inspection

OIL CONTROL VALVE (OCV) INSPECTION [L3 WITH TC]

Coil Resistance Inspection

1. Remove the battery cover.

2. Disconnect the negative battery cable.

3. Disconnect the OCV connector.

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

- If it is not within the specification, replace the OCV.

OCV resistance
- 6.9-7.9 ohms [20°C {68°F}]






5. Connect the OCV connector.

6. Connect the negative battery cable.

7. Install the battery cover.

Spool Valve Operation Inspection

1. Remove the battery cover.

2. Disconnect the negative battery cable.

3. Disconnect the OCV connector.

4. Remove the OCV. Service and Repair

5. Verify that the spool valve in the OCV is in the maximum valve timing retard position as indicated in the figure.






- If not as specified, replace the OCV.

6. Verify that the battery is fully charged.

- If not as specified, recharge the battery.

7. Apply battery positive voltage between the OCV terminals and verify that the spool valve operates and moves to the maximum valve timing advance position.






- If not as specified, replace the OCV.

NOTE:
- When applying battery positive voltage between the OCV terminals, the connection can be either of the following:

- Positive battery cable to terminal A, Negative battery cable to terminal B
- Positive battery cable to terminal B, Negative battery cable to terminal A






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

- If not as specified, replace the OCV.
Service and Repair

9. Connect the OCV connector.

10. Connect the negative battery cable.

11. Install the battery cover.