Code No. P0011: Inlet Variable Valve Timing System


OPERATION



  • Check code No. P0010: inlet oil feeder control valve system (Refer to ).

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 phase of the inlet camshaft.
  • The phase angle of the inlet camshaft is computed from the signal patterns of the crank angle sensor and inlet camshaft position sensor.

TROUBLE JUDGMENT


Check Conditions
  • More than 20 seconds have passed since the engine starting sequence was completed.
  • Engine speed is more than 1,188 r/min.
  • Engine coolant temperature is more than 76°C.
Judgment Criterion
  • Difference between inlet valve open timing and target inlet valve open timing is more than 5°CA for 5 seconds.

FAIL-SAFE AND BACKUP FUNCTION



  • None

PROBABLE CAUSES



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

DIAGNOSIS PROCEDURE

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

  • Data list reference table (Refer to ).

  1. Item 36: V.V.T. phase angle (inlet)

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 inlet oil feeder control valve itself.

  • Oil control valve check (Refer to ).

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

STEP 3. Connector check: B-31 inlet oil feeder control valve connector and B-26 engine-ECU connector

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

STEP 4. Check harness between B-31 (terminal No. 1) inlet oil feeder control valve connector and B-26 (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-37X 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-37X (terminal No. 2) engine control relay connector and B-31 (terminal No. 2) inlet oil feeder control valve connector.
note Before checking harness, check intermediate connector A-17, 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 inlet camshaft sensing portion.

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

STEP 8. Check inlet variable valve timing sprocket operation mechanism for being stuck.

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

Q. Is the check result normal?
Go to Step 9 .
Repair it.

STEP 9. Check oil passage of inlet variable valve timing control system for being clogged.

Q. Is the check result normal?

Go to Step 10 .
Repair it.

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 ).