SFI SYSTEM, Diagnostic DTC:P1047

DTC Code DTC Name
P1047 Valvematic Driver Learned Value Error / Power Source Circuit Malfunction Bank 1

DESCRIPTION

The EDU in the continuously variable valve lift controller assembly learns and stores the actuator position in memory. If the actuator position learned value is abnormal or cannot be learned due to a continuously variable valve lift controller assembly power supply problem or similar malfunction, DTC P1047 is stored. Also, when a VALVEMATIC system malfunction is detected, the power supply to the continuously variable valve lift controller assembly is cut as a fail-safe function and DTC P1047 is stored.

DTC No. DTC Detection Condition Trouble Area
P1047

The power supply to the continuously variable valve lift controller assembly is cut and the continuously variable valve lift controller internal EDU actuator position learned value cannot be learned or is abnormal

(1 trip detection logic)

  • Continuously variable valve lift controller power source circuit

  • Continuously variable valve lift controller assembly

WIRING DIAGRAM

A01IU3FE03

INSPECTION PROCEDURE

Note

When the one of the following DTCs is stored and the MIL is illuminated, DTC P1047 is stored and actuator position learning is performed every time the engine is started. Also, after the system returns to normal, the following occurs during the first driving cycle: 1) DTC P1047 is stored, 2) actuator position learning is performed and 3) the MIL illuminates during actuator position learning.

Actuator position learning is performed when these DTCs are output.
P1046, P1049, P104A, P1055, P2646, P2647, P2648, P2649, P264A, U011B

Tech Tips


  • When there is no power (+B) supplied to the continuously variable valve lift controller assembly, DTC U011B is stored. After the continuously variable valve lift controller assembly power supply system and communication lines have been connected or repaired, actuator position learning is performed and DTC P1047 is stored the next time the vehicle is driven.

  • After performing repairs, perform the following procedures and check that DTCs are not output again.


  1. Connect the GTS to the DLC3.

  2. Start the engine and warm it up.

  3. Turn the GTS on.

  4. Clear the DTCs Click here.

  5. Turn the ignition switch off and wait 10 seconds.

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

  7. Clear the DTCs Click here.

  8. Turn the ignition switch off and wait 10 seconds.

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

  10. Turn the ignition switch off and wait 10 seconds.

  11. Turn the ignition switch to ON.

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

  13. Read the DTCs.


  • 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.

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. PERFORM SIMULATION TEST


    1. Perform the simulation test


      1. Connect the GTS to the DLC3.

      2. Stop the engine and wait 10 seconds.

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

      4. Stop the engine and wait 10 seconds.

      5. Turn the ignition switch to ON.

      6. Turn the GTS on.

      7. Clear the DTCs Click here.

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

    2. Check if the MIL is illuminated during idling after clearing the DTCs in the above simulation test.

      Result
      Result Proceed to
      MIL illuminate A
      MIL does not illuminate B

      Tech Tips

      If the ignition switch is turned to ON while the actuator position learning is incomplete or when learning has not been performed, DTC P1047 is output.


    B

    END

    A

  2. CHECK ANY OTHER DTCS OUTPUT


    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.

    5. Read the DTC.

      Result
      Result Proceed to
      DTC P1047 is output A
      DTC P1047 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  3. CHECK CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY (POWER SOURCE)


    1. A01IORXE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Continuously Variable Valve Lift Controller Assembly)

      Disconnect the continuously variable valve lift controller assembly connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C49-1 (+B) - Body ground Ignition switch ON 11 to 14 V

      Tech Tips

      Perform "Inspection After Repair" after replacing the camshaft housing or continuously variable valve lift controller assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY- BATTERY)

    OK

    REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY Click here