SFI SYSTEM, Diagnostic DTC:P2648, P2649

DTC Code DTC Name
P2648 A Rocker Arm Actuator Control Circuit Low B1
P2649 A Rocker Arm Actuator Control Circuit High B1

DESCRIPTION

The current flowing to the actuator in the continuously variable valve lift controller assembly is monitored by the current sensor in the continuously variable valve lift controller assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2648 A Rocker Arm Actuator Control Circuit Low B1 Current does not flow to the actuator while the actuator is commanded to operate (1 trip detection logic). Continuously variable valve lift controller assembly Comes on DTC stored
P2649 A Rocker Arm Actuator Control Circuit High B1 Actuator overcurrent (1 trip detection logic). Continuously variable valve lift controller assembly Comes on DTC stored

MONITOR DESCRIPTION

When the continuously variable valve lift controller assembly detects that no current is flowing to the actuator even though the actuator is commanded to operate or the current flowing to the actuator is more than the amount requested, 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 ignition 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 ignition switch off and wait for at least 30 seconds.

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

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

  12. Turn the ignition switch to ON.

  13. Turn the GTS on.

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

  15. Read the DTCs.

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


  • If DTC P1055 is output at the same time as DTC P2648 or P2649, disregard DTC P1055 and proceed with the inspection.

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

  • 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.

  • 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.

PROCEDURE


  1. REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY


    1. Replace the continuously variable valve lift controller assembly.

      Click here

      Tech Tips

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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END