Code No. P0010: Inlet Oil Feeder Control Valve System




OPERATION



  • Power is supplied to the inlet oil feeder control valve connector terminal from the engine control relay connector terminal.
  • The engine-ECU connector terminal OCVI makes the power transistor in the unit be in ON position, and that makes currents go on the inlet oil feeder control valve connector terminal.

FUNCTION



  • The engine-ECU controls the spool valve position of the inlet oil feeder control valve corresponding to the driving condition of the engine and continuously changes the angle of the intake camshaft.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is "ON" position.
  • Inlet oil feeder control valve is OFF.
  • Battery positive voltage is more than 10 V and is less than 16.5 V.
Judgement Criterion
  • The engine-ECU terminal current value of inlet oil feeder control valve circuit is less than 0.1 A for 2 seconds.
  • The engine-ECU terminal current value of inlet oil feeder control valve circuit is more than 2.9 A.

FAIL-SAFE AND BACKUP FUNCTION



  • V.V.T. phase angle (inlet) becomes most retarded angle.

PROBABLE CAUSES



  • Failed inlet oil feeder control valve
  • Open/short circuit or harness damage in inlet oil feeder control valve circuit or loose connector contact
  • Failed engine-ECU

DIAGNOSIS PROCEDURE


STEP 1. Check inlet oil feeder control valve itself.



  • Inlet oil feeder control valve connector check.
  • Oil feeder control valve check (Refer to ).

Q. Is the check result normal?

Go to Step 2.
Repair or replace the connector, or replace the inlet oil feeder control valve.

STEP 2. Perform voltage measurement at inlet oil feeder control valve connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal power supply line and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 4.
Go to Step 3.

STEP 3. Connector check: engine control relay connector


Q. Is the check result normal?


    Check intermediate connector, and repair if necessary. If intermediate connector is normal, check and repair harness between engine control relay connector terminal and inlet oil feeder control valve connector terminal power supply line.

    • Check power supply line for open/short circuit.
Repair or replace the connector.

STEP 4. Perform voltage measurement at engine-ECU connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal OCVI and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 5.

    Repair or replace the connector, or check and repair harness between inlet oil feeder control valve connector terminal and engine-ECU connector terminal OCVI.

    • Check output line for open/short circuit.

STEP 5. Check harness between engine control relay connector terminal and inlet oil feeder control valve connector terminal power supply line.



  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 6.
Repair or replace the connector, or repair the damaged harness wire.

STEP 6. Check harness between inlet oil feeder control valve connector terminal and engine-ECU connector terminal OCVI.



  • Check output line for damage.

Q. Is the check result normal?

Go to Step 7.
Repair the damaged harness wire.

STEP 7. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).