ECD SYSTEM(w/o EGR System) Lack of Power (Turbocharger System)

CAUTION / NOTICE / HINT

Tech Tips


  • The diagnosis flowchart is for lack of power due to turbocharger factors.

  • If symptom-specific diagnosis indicates a turbocharger related problem, check using this flowchart.

PROCEDURE


  1. CHECK TURBOCHARGER SUB-ASSEMBLY


    1. Check that no soot or oil adheres to the turbocharger sub-assembly connectors.

      B0026PVE01

      Tech Tips

      If adhering soot or an oil leak exists, air leaking at that position may be the cause of the lack of boost pressure.

      Result
      Result Proceed to
      No adhering soot or an oil A
      Soot adhering around the turbine housing, flange, or exhaust pipe clamp (A in the illustration) B
      Oil leak from the contact surface between the compressor housing and bearing housing (B in the illustration) C

    B

    CHECK TURBINE OUTLET ELBOW Click here

    C

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    A

  2. INSPECT TURBOCHARGER SUB-ASSEMBLY (TURBINE SHAFT)


    1. Remove the turbocharger sub-assembly.


      • Check that the turbine shaft rotates smoothly, without catching.

      • Check for loose turbine mounting nuts and for axial play in the turbine shaft.

      Tech Tips

      If the turbine shaft catches or if there is no play or excessive play, it could indicate improper sealing due to seizing or poor sliding because of a deposit build-up.

      Standard value
      0.10 mm (0.00394 in.) or less
      Result
      Result Proceed to
      No turbine shaft malfunction A
      Turbine shaft malfunction B

    B

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    A

  3. INSPECT TURBOCHARGER SUB-ASSEMBLY


    1. Check for interference between the turbine wheel and the turbine housing.

      Click here

      Tech Tips

      When there is interference between the turbine wheel and turbine housing and the turbine wheel is damaged, check for fragments of the turbine wheel in the turbine outlet elbow.

      Result
      Result Proceed to
      No damage or interference A
      Damage or interference exists B

    B

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

    A

  4. INSPECT TURBOCHARGER NOZZLE VANE PLATE


    1. Inspect the turbocharger nozzle vane plate.


      1. Remove the e-washer from the turbocharger nozzle vane control actuator.

    2. B0028B2

      Move the turbocharger vane control rod sub-assembly and check that the turbocharger nozzle vane plate moves.

      Result
      Result Proceed to
      Catches, but operates* OK
      Gets stuck and does not operate NG

      Tech Tips

      *: Check several times.


    OK

    REPLACE TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR Click here

    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

  5. CHECK TURBINE OUTLET ELBOW


    1. Check for deformation or cracks in the mounting surfaces on theturbine outlet elbow and the turbocharger sub-assembly.

      Tech Tips

      Deformation or cracks on a mounting surface may allow exhaust gas to leak from the damaged position.

      Standard
      No deformation or cracks on a mounting surface
      Result
      Result Proceed to
      No problem with the mounting surface A
      Deformation or cracks on the turbine outlet elbow mounting surface B
      Deformation or cracks on the turbocharger sub-assembly mounting surface C

    B

    REPLACE TURBINE OUTLET ELBOW Click here

    C

    REPLACE TURBINE HOUSING SUB-ASSEMBLY Click here

    A

  6. REPLACE EXHAUST PIPE CLAMP AND GASKET


    1. Replace the exhaust pipe clamp and the gasket.

      Result
      Proceed to
      NEXT

    NEXT

  7. PERFORM SIMULATION TEST


    1. Check that the abnormal state has disappeared.

      Result
      Proceed to
      NEXT

    NEXT

    END