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Home >> Subaru >> 2010 >> Outback i, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System - Fuel Injection (Fuel Systems) (H4SO - 2.5L SOHC) >> Intake Manifold >> Removal >> Multi-Function Duct Assembly
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Multi-Function Duct Assembly

  1. Release the fuel pressure. Ref. to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel.
  2. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery
    G06648487Courtesy of SUBARU OF AMERICA, INC.
  3. Open the fuel filler lid and remove the fuel filler cap.
  4. Lift up the vehicle.
  5. Remove the under cover. Ref. to REMOVAL , Front Under Cover.
  6. Drain approximately 3.0 l  (3.2 US qt, 2.6 lmp qt) of engine coolant. Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.
  7. Lower the vehicle.
  8. Remove the intake manifold. Ref. to INTAKE MANIFOLD , REMOVAL, Intake Manifold.
  9. Remove the bolt, and disconnect the bulkhead harness connector from the engine harness connector and rear engine hanger.
    Fig 2: Locating Bulkhead Harness Connector Bolt
    G05953679Courtesy of SUBARU OF AMERICA, INC.
  10. Slide the engine harness connector in the direction of the arrow and remove it from the rear engine hanger.
    Fig 3: Sliding Engine Harness Connector
    G05953680Courtesy of SUBARU OF AMERICA, INC.
  11. Disconnect the water hose (A) and EGR pipe (B) from the LH side of multi-function duct assembly.
    Fig 4: Identifying Water Hose And EGR Pipe
    G06648263Courtesy of SUBARU OF AMERICA, INC.
  12. Disconnect the PCV hose (A) and water hose (B) from the RH side of multi-function duct assembly.
    Fig 5: Identifying PCV Hose And Water Hose
    G06648264Courtesy of SUBARU OF AMERICA, INC.
  13. Disconnect the connectors from the engine coolant temperature sensor (A), oil pressure switch (B) and crankshaft position sensor (C).
    Fig 6: Identifying Engine Coolant Temperature Sensor, Oil Pressure Switch And Crankshaft Position Sensor Connectors
    G06648265Courtesy of SUBARU OF AMERICA, INC.
  14. Disconnect the connectors from front oxygen (A/F) sensor (A) and rear oxygen sensor (B).
  15. Disconnect the connector (C) from the ignition coil of #1 cylinder.
  16. Disconnect the connectors from oil switching solenoid valve RH (D), oil temperature sensor RH (E) and variable valve lift diagnosis switch (F), and remove the bolt to detach the ground terminal (G).
    Fig 7: Identifying Front Oxygen (A/F) Sensor, Rear Oxygen Sensor, Ignition Coil, Oil Temperature Sensor Connectors
    G06648266Courtesy of SUBARU OF AMERICA, INC.
  17. Slide the front oxygen (A/F) sensor connector and rear oxygen sensor connector in the direction of the arrow and remove them from the bracket.
    Fig 8: Removing Front Oxygen (A/F) Sensor Connector And Rear Oxygen Sensor Connector From Bracket
    G06648267Courtesy of SUBARU OF AMERICA, INC.
  18. Disconnect the connector from the ignition coil of #4 cylinder.
  19. Disconnect the connectors from the oil switching solenoid valve LH (A) and camshaft position sensor LH (B).
    Fig 9: Identifying Oil Switching Solenoid Valve LH And Camshaft Position Sensor LH Connectors
    G06648268Courtesy of SUBARU OF AMERICA, INC.
  20. Remove the PCV pipe, multi-function duct assembly and engine harness as a single unit from the engine.
    Fig 10: Identifying PCV Pipe, Multi-Function Duct Assembly And Engine Harness
    G06648269Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the bolts (A) and remove the multifunction duct assembly from the PCV pipe.
  22. Remove the clips (B) and remove the engine harness from the PCV pipe.
    Fig 11: Identifying Multifunction Duct Assembly Bolts And Engine Harness Clips
    G06648270Courtesy of SUBARU OF AMERICA, INC.
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