Code No. P0011: Variable Valve Timing System

OPERATION

Refer to Code No. P0010: Oil Feeder Control Valve System

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 phase of the camshaft.
The phase angle of the camshaft is computed from the signal patterns of the crank angle sensor and 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 intake valve open timing and target intake valve open timing is more than 5°CA for 5 seconds.

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 camshaft
Failed engine-ECU

DIAGNOSIS PROCEDURE

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

Data list reference table (Refer to ).

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.

Oil feeder control valve connector check.
Oil feeder control valve check (Refer to ).

Q. Is the check result normal?

	Go to Step 3.

	Repair or replace the connector, or replace the oil feeder control valve.

STEP 3. 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 4.

	Repair or replace the connector, or repair the damaged harness wire.

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 camshaft sensing portion.

Q. Is the check result normal?

	Go to Step 6.

	Replace the camshaft.

STEP 6. Check variable valve timing sprocket operation mechanism for being stuck.

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

Q. Is the check result normal?

	Go to Step 7.

	Repair it.

STEP 7. Check oil passage of variable valve timing control system for being clogged.

Q. Is the check result normal?

	Go to Step 8.

	Repair it.

STEP 8. 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 ).