SFI SYSTEM, Diagnostic DTC:P1049

DTC Code DTC Name
P1049 VALVEMATIC Circuit B1

DESCRIPTION

The EDU in the continuously variable valve lift controller assembly monitors the driver circuit in the continuously variable valve lift controller assembly and detects malfunctions.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1049 VALVEMATIC Circuit B1 EDU internal error (1 trip detection logic). Continuously variable valve lift controller assembly Comes on DTC stored

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 P104A is output at the same time as DTC P1049, disregard DTC P104A 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.

      Tech Tips

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

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END