ECD SYSTEM, Diagnostic DTC:P1473 and 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
Table 1. 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

Tip:

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.

      Tip:

      • 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 VALVEClick 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

      Result

      Proceed to

      DTC P1473 or P1476

      DTC P1473 or P1476

      A

      No DTC output

      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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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