SFI SYSTEM, Diagnostic DTC:P2646, P2647

DTC Code DTC Name
P2646 "A" Rocker Arm Actuator System Performance or Stuck Off Bank 1
P2647 "A" Rocker Arm Actuator System Stuck On Bank 1

DESCRIPTION

The EDU in the continuously variable valve lift controller assembly sends a motor drive request and supplies current to the motor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2646 "A" Rocker Arm Actuator System Performance or Stuck Off Bank 1

When all of the following conditions are met (1 trip detection logic):


  • The actuator duty cycle is 80% or higher

  • The actuator current is 5 A or higher

  • The stroke variation is 0.01 mm (0.00039 in.) or less every 0.016 seconds

  • Continuously variable valve lift controller assembly

  • Camshaft housing sub-assembly

 Comes on DTC stored
P2647 "A" Rocker Arm Actuator System Stuck On Bank 1

When all of the following conditions are met (1 trip detection logic):


  • The actuator duty cycle is 80% or less

  • The actuator current is 5 A or higher

  • The stroke variation is 0.01 mm (0.00039 in.) or less every 0.016 seconds

  • Continuously variable valve lift controller assembly

  • Camshaft housing sub-assembly

 Comes on DTC stored

Perform the following procedures to confirm that the VALVEMATIC system is operating normally.


  1. Connect the GTS to the DLC3.

  2. Start the engine.

  3. Turn the GTS on.

  4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VALVEMATIC(ENG ON) / Primary / VALVEMATIC Current Angle and VALVEMATIC Target Angle.

    Note

    Make sure the following conditions are met when performing the Active Test.


    • The engine is running.

    • The engine coolant temperature is 40°C (104°F) or higher.

    • The vehicle is stationary.

    • The shift lever is in P or N.

    Result
    The "VALVEMATIC Current Angle" follows the "VALVEMATIC Target Angle".

Tech Tips

If the malfunction does not reoccur, refer to the engine coolant temperature and intake air temperature recorded in the freeze frame data and perform a simulation test.

When the Active Test results are abnormal, remove the continuously variable valve lift controller assembly from the camshaft housing sub-assembly and perform the "Activate the VALVEMATIC(ENG OFF)" Active Test with the removed continuously variable valve lift controller assembly to determine whether the problem is with the continuously variable valve lift controller assembly or camshaft housing sub-assembly.

MONITOR DESCRIPTION

When the EDU in the continuously variable valve lift controller assembly detects that the actuator does not operate even though the EDU commands the actuator to operate and power is supplied to the actuator, a DTC is stored and the MIL illuminates.

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Start the engine and warm it up.

  3. Turn the GTS on.

  4. Clear the DTCs.

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

  6. Start the engine and idle it for 20 seconds.

  7. Turn the GTS on.

  8. Clear the DTCs.

  9. Turn the engine switch off and wait for at least 30 seconds.

  10. Start the engine and idle it for 20 seconds.

  11. Turn the engine switch off and wait for at least 30 seconds.

  12. Turn the engine switch on (IG).

  13. Turn the GTS on.

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

  15. Read the pending DTCs.

    Tech Tips


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

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

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

  17. Input the DTC: P2646 or P2647.

  18. 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

    Tech Tips


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

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

CAUTION / NOTICE / HINT

Note

When one of the following DTCs is output and the MIL is illuminated, actuator position learning is performed during the next trip. After the system returns to normal, actuator position learning is performed during the next trip and the MIL remains illuminated until learning is complete.

Actuator position learning is performed when these DTCs are output.
P1049, P104A, P1055, P2646, P2647, P2648, P2649, P264A, U011B

Tech Tips


  • After performing repairs, perform the confirmation driving pattern and check that DTCs are not output again.

  • Also, perform the "Activate the VALVEMATIC(ENG ON)" Active Test and confirm that the VALVEMATIC system is operating normally.

  • After using the GTS to perform minimum valve lift learning, keep the engine idling for 30 seconds to complete learning. Otherwise, the VALVEMATIC system may not operate normally, causing poor acceleration, etc.

  • Do not disconnect the cable from the negative (-) battery terminal while power supply voltage is being supplied to the continuously variable valve lift controller assembly.

  • Disconnecting the cable from the negative (-) battery terminal while power supply voltage is being supplied to the continuously variable valve lift controller assembly may cause DTC P2646 (Motor Locked) to be stored.

  • 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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      Only DTC P2646 or P2647 is output A
      DTC P0112, P0113, P0115, P0117 or P0118 is output at the same time as DTC P2646 and/or P2647 B
      DTC P264A is output C

      Tech Tips


      • If an engine coolant temperature sensor malfunction DTC or intake air temperature sensor malfunction DTC is output at the same time as DTC P2646 or P2647, check the corresponding engine coolant temperature sensor or intake air temperature sensor first.

      • After repairing the engine coolant temperature sensor or intake air temperature sensor, clear the DTCs, perform a simulation test and check that the engine coolant temperature sensor or intake air temperature sensor DTC is not output.

      • When the engine coolant temperature sensor or intake air temperature sensor DTC does not reoccur but DTC P2646 or P2647 is output again, perform troubleshooting from the next step. If a DTC is not output, troubleshooting is complete.

      • If DTC P264A is output at the same time, replace the continuously variable valve lift controller assembly as one or more of the position sensor and/or angle sensor in the continuously variable valve lift controller assembly are malfunctioning.

      • After replacing the continuously variable valve lift controller assembly, perform a simulation test and confirm that DTCs are not output.

      • Perform "Inspection After Repair" after replacing the continuously variable valve lift controller assembly.

        Click here


    B

    GO TO DTC CHART Click here

    C

    REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY Click here

    A

  2. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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

    6. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P2646 or P2647 is output A
      DTC P264A is output B

      Tech Tips


      • If DTC P264A is output, replace the continuously variable valve lift controller assembly as the position sensor and/or angle sensor are malfunctioning.

      • Perform "Inspection After Repair" after replacing the continuously variable valve lift controller assembly.

        Click here


    B

    REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY Click here

    A

  3. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VALVEMATIC (ENG OFF))


    1. Remove the continuously variable valve lift controller assembly from the camshaft housing sub-assembly.

      Click here

    2. Reconnect the continuously variable valve lift controller assembly connector.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG) (do not start the engine).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VALVEMATIC(ENG OFF) / Data List / Primary / VALVEMATIC Current Angle.


      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Activate the VALVEMATIC(ENG OFF)
      Data List Display
      VALVEMATIC Current Angle

    7. When the continuously variable valve lift controller assembly is operated using GTS, check whether the shaft moves.

      Click here

      Tech Tips


      • Make sure to perform the "Activate the VALVEMATIC(ENG OFF)" Active Test with the continuously variable valve lift controller assembly removed from the vehicle.

      • Perform the Active Test with the body of the continuously variable valve lift controller assembly connected to ground, as the continuously variable valve lift controller assembly is grounded through the body.

      OK
      GTS Operation Specified Condition
      Low VALVEMATIC Current Angle is 100 to 120 deg(CA) and shaft extends
      High VALVEMATIC Current Angle is 250 deg(CA) or more and shaft retracts

      Tech Tips


      • If the malfunction does not reoccur, refer to the engine coolant temperature and intake air temperature recorded in the freeze frame data and perform a simulation test.

      • Perform "Inspection After Repair" after replacing the continuously variable valve lift controller assembly or camshaft housing sub-assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CAMSHAFT HOUSING SUB-ASSEMBLY Click here

    NG

    REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY Click here