Code No. P0011: Variable Valve Timing System








OPERATION



  • Refer to Code No. P1021: Oil feeder control valve system

FUNCTION



  • The engine-ECU checks variable valve timing system for abnormal conditions.

TROUBLE JUDGMENT


Check Conditions
  • During engine running.
  • Operation of the oil feeder control valve: OFF
  • The oil feeder control valve is normal
  • The camshaft position sensor is normal
Judgment Criterion
  • When a condition continues for 10 seconds in which the detected phase angle is on the advanced side with respect to the angle 15° advanced from the most retarded angle.

FAIL-SAFE AND BACKUP FUNCTION



  • None

PROBABLE CAUSES



  • Failed oil feeder control valve
  • Damage in oil feeder control valve circuit or loose connector contact
  • Failed timing sprocket operation
  • Clogged oil passage
  • Failed inlet camshaft
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. Item 36: V. V. T. phase angle

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2 .

STEP 2. Check oil feeder control valve itself.

  • Check oil feeder control valve itself (Refer to ).

Q. Is the check result normal?
Go to Step 3 .
Replace the oil feeder control valve.

STEP 3. Connector check: B-16 oil feeder control valve connector and B-08 engine-ECU connector

Q. Are the check results normal?
Go to Step 4 .
Repair or replace the connector.

STEP 4. Check harness between B-16 (terminal No. 2) oil feeder control valve connector and B-08 (terminal No. 1) engine-ECU connector.

  • Check output line for damage.

Q. Is the check result normal?
Go to Step 5 .
Repair the damaged harness wire.

STEP 5. Connector check: A-33X engine control relay connector

Q. Is the check result normal?
Go to Step 6 .
Repair or replace the connector.

STEP 6. Check harness between A-33X (terminal No. 2) engine control relay connector and B-16 (terminal No. 1) oil feeder control valve connector.
note Before checking harness, check intermediate connector A-11, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?
Go to Step 7 .
Repair the damaged harness wire.

STEP 7. Check camshaft sensing portion.

Q. Is the check result normal?
Go to Step 8 .
Replace the inlet camshaft.

STEP 8. Check oil passage of variable valve timing control system for being clogged.

Q. Is the check result normal?

Go to Step 9 .
Repair

STEP 9. Check variable valve timing sprocket operation mechanism for being stuck.

  • Check variable valve timing sprocket (Refer to GROUP 11B - Timing Chain - Inspection

Q. Is the check result normal?
Go to Step 10 .
Repair

STEP 10. 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 ).