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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1047

Valvematic Driver Learned Value Error / Power Source Circuit Malfunction Bank 1

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

Comes on

DTC stored

MONITOR DESCRIPTION

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.

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.

WIRING DIAGRAM

A298706E02

CAUTION / NOTICE / HINT

Note:

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

  • 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
Tip:

  • 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.

  • 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. PERFORM SIMULATION TEST

    1. Perform the simulation test

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

    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
      Tip:

      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 (IN ADDITION TO DTC P1047)

    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 DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P1047 is output

      A

      DTC P1047 and other DTCs are output

      B
      Tip:

      If any DTCs other than P1047 are output, troubleshoot those DTCs first.

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

    1. A283477C02

      *a

      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

      Condition

      Specified Condition

      B43-1 (+B) - Body ground

      Ignition switch ON

      11 to 14 V
      Tip:

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

      Click hereClick here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY

    Click here

    NG

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