SFI SYSTEM, Diagnostic DTC:P0011 and 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

Refer to DTC P0010 (Click here).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0011

Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)

Intake valve timing is stuck at a certain value when in the advance range (1 trip detection logic).

  • Valve timing

  • Camshaft timing oil control valve assembly (for intake camshaft)

  • Oil control valve filter

  • Camshaft timing gear assembly

  • ECM

Comes on

DTC stored

P0012

Camshaft Position "A" - Timing Over-Retarded (Bank 1)

Intake valve timing is stuck at a certain value when in the retard range (2 trip detection logic).

  • Valve timing

  • Camshaft timing oil control valve assembly (for intake camshaft)

  • Oil control valve filter

  • Camshaft timing gear assembly

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

  • The ECM optimizes the intake valve timing using the Variable Valve Timing (VVT) system to control the intake camshaft. The VVT system includes the ECM, the camshaft timing oil control valve assembly and the VVT controller (camshaft timing gear assembly). The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake camshaft.

  • If the difference between the target and actual intake valve timings is large, and changes in the actual intake valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and stores a DTC.

  • Example:

  • A DTC is stored when the following conditions "A" and "B" are met:

    1. It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").

    2. After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 10 times or more for the advanced camshaft timing (when the vehicle is idling, this takes approximately 9.5 seconds) (Condition "B").

    3. After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 63 times or more for the retarded camshaft timing (when the vehicle is idling, this takes approximately 60 seconds) (Condition "B").

  • DTC P0011 (Advanced Cam Timing) is subject to 1 trip detection logic.

  • DTC P0012 (Retarded Cam Timing) is subject to 2 trip detection logic.

  • These DTCs indicate that the VVT controller cannot operate properly due to camshaft timing oil control valve assembly malfunctions or the presence of foreign objects in the camshaft timing oil control valve assembly.

CONFIRMATION DRIVING PATTERN

A232050E41
  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on [A].

  6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].

  7. Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  8. Idle the engine for 3 minutes or more [D].

  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].

  10. Read the pending DTCs.

    Tip:
    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0011 or P0012.

  13. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL

    • DTC judgment completed

    • System normal

    ABNORMAL

    • DTC judgment completed

    • System abnormal

    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tip:
    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [F] through [H].

  14. Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) and then decelerating the vehicle 10 to 15 times [F].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    Tip:

    Depress the accelerator pedal by a large amount.

  15. Idle the engine for 3 minutes or more [G].

  16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].

  17. Read pending DTCs.

    Tip:
    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  18. Check the DTC judgment result again.

    Tip:
    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0010 (Click here).

CAUTION / NOTICE / HINT

Tip:
  • DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

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

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    5. Read DTCs.

      Result

      Result

      Proceed to

      DTC P0011 or P0012 is output

      A

      DTC P0011 or P0012 and other DTCs are output

      B

      Tip:

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

    B

    GO TO DTC CHART

    A
  2. PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT LINEAR)

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Turn the A/C switch on.

    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1).

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Control the VVT Linear (Bank1)

    6. Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the GTS.

      OK

      GTS Operation

      Specified Condition

      0%

      Normal engine speed

      100%

      Engine idles roughly or stalls

      Tip:

      Refer to "Data List / Active Test" [VVT OCV Duty #1 and VVT Change Angle #1] (Click here).

    Result

    Proceed to

    OK

    NG

    NG

    INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)Click here

    OK
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs (Click here).

      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

    11. Read pending DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0011 or P0012 is output

      B

      Tip:

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

    A

    CHECK FOR INTERMITTENT PROBLEMS

    B
  4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)

    1. Inspect the camshaft timing oil control valve assembly (for intake camshaft) (Click here).

    Result

    Proceed to

    OK

    NG

    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)

    OK
  5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

    1. Inspect the camshaft timing gear assembly (Click here).

    Tip:

    Perform "Inspection After Repair" after replacing the camshaft timing gear assembly (Click here).

    Result

    Proceed to

    OK

    NG

    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

    OK
  6. INSPECT OIL CONTROL VALVE FILTER

    1. Remove the oil control valve filter (Click hereClick here).

    2. Check that the filter is not clogged.

      OK

      Filter is not clogged.

    Result

    Proceed to

    OK

    NG

    NG

    REPLACE OIL CONTROL VALVE FILTER

    OK
  7. ADJUST VALVE TIMING

    1. Adjust the valve timing (Click hereClick here).

      Tip:

      There are no marks on the cylinder head to match up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to match up the alignment marks.

    Result

    Proceed to

    NEXT

    NEXT
  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs (Click here).

      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

    11. Read the pending DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0011 or P0012 is output

      B

      Tip:

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

    A

    END

    B

    REPLACE ECM