ECD SYSTEM, Diagnostic DTC:P1473, P1476

DTC Code DTC Name
P1473 Fault Path for Long Time Drift
P1476 Swirl Valve Broken Lever Detection

DESCRIPTION

Refer to DTC P2016.

Click here

The position deviations of the current measurement for the swirl control valve and a new swirl control valve with open and closed swirl flaps is calculated in the adaptation phase.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1473 Fault Path for Long Time Drift

The fault is detected if one of these position deviations exceeds the relevant long-term drift limit value (for open swirl flaps: 18%, for closed swirl flaps: 9%).

(3 trip detection logic)

 Swirl control valve Does not come on DTC stored
P1476 Swirl Valve Broken Lever Detection

The fault is detected when the signal voltage of the position feedback drops below the limit value (0.49 V) that displays the internal limit position of the direct current motor for 1.5 seconds.

(3 trip detection logic)

 Swirl control valve Does not come on DTC stored
Related Data List
DTC No. Data List

P1473

P1476

 Swirl Valve Actuator Position

WIRING DIAGRAM

Refer to DTC P2016.

Click here

CAUTION / NOTICE / HINT

Note

After replacing the swirl control valve, the ECM needs initialization.

Click here

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK SWIRL CONTROL VALVE


    1. Check for soot deposits inside the swirl control valve.

      OK
      No soot deposits.

      Tech Tips


      • If soot deposits are found, clean the swirl control valve.

      • If cleaning does not remove the soot deposits, replace the swirl control valve.

    2. Check for the operation mechanism of the swirl control valve for damage such as link deformation.

      OK
      No damage.

    3. Check operation.


      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON and turn the GTS on.

      3. Start the engine.

      4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Actuator Test of Swirl Flap / Data List / Swirl Valve Actuator Position.


        Powertrain > Engine and ECT > Active Test
        Active Test Display
        Actuator Test of Swirl Flap
        Data List Display
        Swirl Valve Actuator Position
        OK
        The value of "Swirl Valve Actuator Position" changes according to the amount "Actuator Test of Swirl Flap" is operated, and the swirl flap operates smoothly.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SWIRL CONTROL VALVE Click here

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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


      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P1473 or P1476 A
      No DTC output B

    B

    END

    A

  3. REPLACE SWIRL CONTROL VALVE


    1. Replace the swirl control valve.

      Click here

    2. Perform the swirl valve learning value reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 5 Click here

  4. REPLACE SWIRL CONTROL VALVE


    1. Replace the swirl control valve.

      Click here

    2. Perform the swirl valve learning value reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END