SFI SYSTEM (w/ Electronic Throttle Control System), Diagnostic DTC:P0011, P0012

DTC Code DTC Name
P0011 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
P0012 Camshaft Position "A" - Timing Over-Retarded (Bank 1)

DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, Camshaft Timing Oil Control Valve (OCV) and VVT controller. The ECM sends a target "duty-cycle" control signal to the OCV. This control signal, applied to the OCV, regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed based on engine operating conditions such as intake air volume, throttle position and engine coolant temperature. The ECM controls the OCV based on the signals from several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result, the relative position between the camshaft and crankshaft is optimized, engine torque and fuel economy improve, and the exhaust emissions drop. The ECM detects actual valve timing using signals from the camshaft and crankshaft position sensors. The ECM performs feedback control and verifies target valve timing.

A0136ZEE01
DTC No. DTC Detection Condition Trouble Area
P0011 Difference between the target camshaft angle and the actual camshaft angle is more then 10° after foreign object removing activation operated (1 or 2 trip detection logic)

  • Valve timing

  • Camshaft timing oil control valve (OCV)

  • VVT controller assembly

  • ECM
P0011

Relative angle of the camshaft and crankshaft has deviated by 10° CA (crankshaft angle) from the standard angle at the advanced VVT side

(3 trip detection logic)

  • Valve timing (jumped teeth of timing chain, chain stretched)

  • Camshaft timing oil control valve (OCV)

  • VVT controller assembly

  • ECM
P0012

Relative angle of the camshaft and crankshaft has deviated by 15° CA from the standard angle at the retarded VVT side

(3 trip detection logic)

Tech Tips


  • DTC P0011 is detected when the vehicle is driven in the city for approximately 20 minutes after warm- up (repetitive acceleration for 3 seconds and deceleration for 5 seconds).

  • DTC P0012 is detected when the engine idles for approximately 10 seconds after warm-up. If not detected, rev up the engine and let it idle for approximately 10 seconds again.

WIRING DIAGRAM

A0138GYE01

INSPECTION PROCEDURE

Note

After replace the ECM, perform electronic throttle learning Click here.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO P0011 OR P0012)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the intelligent tester ON.

    3. Select the following menu items: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Display (DTC Output) Proceed To
      P0011 or P0012 A
      "P0011 or P0012" and other DTCs B

      Tech Tips

      If any DTCs other than "P0011 or P0012" are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART

    A

  2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OCV OPERATION)


    1. Start the engine and warm it up.

    2. Turn the ignition switch to OFF.

    3. Connect the intelligent tester to the DLC3.

    4. Start the engine and turn the intelligent tester ON.

    5. Select the following menu items: Powertrain / Engine and ECT / Active Test / VVT Control (Bank 1).

    6. Check the engine speed when operating the OCV using the intelligent tester.

      Result
      Tester Operation Specified Condition Proceed To
      OCV is OFF to ON Rough idling or engine stalling A
      OCV is OFF to ON No change in engine speed B

    B

    INSPECT ECM (OCV SIGNAL) Click here

    A

  3. CHECK VALVE TIMING


    1. Check for looseness or a jumped tooth in the timing chain.

      OK
      The matchmarks of the crankshaft pulley and camshaft pulley align.

    NG

    ADJUST VALVE TIMING

    OK

  4. CHECK IF DTC OUTPUT RECURS (DTC P0011 OR P0012)


    1. Clear DTC using the intelligent tester.

    2. Start the engine and warm it up.

    3. Drive the vehicle for 20 minutes or more.

    4. Connect the intelligent tester to the DLC3.

    5. Select the following menu items: Powertrain / Engine and ECT / DTC / Pending.

    6. Read DTCs.

      OK
      No DTC output.

      Tech Tips

      DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.


    OK

    VVT SYSTEM OK

    NG

  5. INSPECT ECM (OCV SIGNAL)


    1. A0135W5E01

      Disconnect the B12 OCV connector.

    2. While running the engine at idle, check the waveform between the terminals of the B12 OCV connector using the oscilloscope.

      Standard
      Tester Connection Specified Condition
      OCV+ (B12-1) - OCV-(B12-2) Correct waveform is as shown

    3. Reconnect the OCV connector.


    NG

    CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE - ECM) Click here

    OK

  6. INSPECT OIL CONTROL VALVE FILTER


    1. A0136MH

      Remove the oil control valve filter.

    2. Inspect the oil control valve.

      OK
      The filter is not clogged.

    NG

    REPLACE OIL CONTROL VALVE FILTER

    OK

  7. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE


    1. A01379IE02

      Remove the camshaft timing oil control valve.

    2. Apply battery positive voltage to terminal 1 and battery negative voltage to terminal 2.

    3. Check the valve operation.

      OK
      The valve has no contamination and moves smoothly.

    OK

    INSPECT CAMSHAFT TIMING SPROCKET ASSEMBLY Click here

    NG

  8. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE


    NEXT

  9. INSPECT CAMSHAFT TIMING SPROCKET ASSEMBLY


    1. Inspect the camshaft timing sprocket assembly.

      OK
      The camshaft timing gear rotates smoothly when applying pressure.

    OK

    CHECK IF DTC OUTPUT RECURS (DTC P0011 OR P0012) Click here

    NG

  10. REPLACE CAMSHAFT TIMING SPROCKET ASSEMBLY


    NEXT

  11. CHECK IF DTC OUTPUT RECURS (DTC P0011 OR P0012)


    1. Clear DTC using the intelligent tester.

    2. Start the engine and warm it up.

    3. Drive the vehicle for 20 minutes or more.

    4. Connect the intelligent tester to the DLC3.

    5. Select the following menu items: Powertrain / Engine and ECT / DTC / Pending.

    6. Read DTCs.

      OK
      No DTC output.

      Tech Tips

      DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.


    OK

    VVT SYSTEM OK

    NG

    GO TO "CHECK FOR INTERMITTENT PROBLEMS"

  12. CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE - ECM)


    1. A0138GLE01

      Disconnect the B12 OCV connector.

    2. Disconnect the B26 ECM connector.

    3. Measure the resistance.

      Standard resistance (check for open)
      Tester Connection Specified Condition
      OCV- (B12-2) - OCV- (B26-1) Below 1 Ω
      Standard resistance (check for short)
      Tester Connection Specified Condition
      OCV- (B12-2) or OCV- (B26-1) - Body ground 10 kΩ or higher

    4. Reconnect the OCV connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM