Code No. P0010: Oil Feeder Control Valve System


OPERATION



  • Power is supplied to the oil feeder control valve connector terminal from the engine control relay connector terminal.
  • The engine-ECU connector terminal OCV1 makes the power transistor in the unit be in ON position, and that makes currents go on the oil feeder control valve connector terminal.

FUNCTION



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

TROUBLE JUDGMENT


Check Conditions
  • Ignition switch is "ON" position.
  • Battery positive voltage is more than 10 V and is less than 16.5 V.
  • ON duty cycle of the oil feeder control valve circuit is more than 20%.
Judgement Criterion
  • The engine-ECU terminal current of oil feeder control valve circuit is less than 0.1 A for 2 seconds.
Check Conditions
  • Ignition switch is "ON" position.
  • Battery positive voltage is more than 10 V and is less than 16.5 V.
Judgement Criterion
  • The engine-ECU terminal current of oil feeder control valve circuit is more than 2.9 A.

FAIL-SAFE AND BACKUP FUNCTION



  • V.V.T. phase angle becomes most advanced angle.

PROBABLE CAUSES



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

DIAGNOSIS PROCEDURE

STEP 1. Check oil feeder control valve itself.

  • 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 oil feeder control valve.

STEP 2. Perform voltage measurement at 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 3.

    Repair or replace the connector, or check and repair harness between engine control relay connector terminal and oil feeder control valve connector terminal power supply line.

    • Check power supply line for open/short circuit.

STEP 3. Perform voltage measurement at engine-ECU connector.

  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal OCV1 and body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 4.

    Repair or replace the connector, or check and repair harness between oil feeder control valve connector terminal and engine-ECU connector terminal OCV1.

    • Check output line for open/short circuit.

STEP 4. Check harness between engine control relay connector terminal and oil feeder control valve connector terminal.

  • Check power supply line for damage.

Q. Is the check result normal?
Go to Step 5.
Repair or replace the connector, or repair the damaged harness wire.

STEP 5. Check harness between oil feeder control valve connector terminal and engine-ECU connector terminal OCV1.

  • Check output 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. 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 ).