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Home >> Toyota >> 2019 >> Sequoia SR5, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Emission Control System (3UR-FE) (Service Information) >> Air Switching Valve >> Removal [08/2015 - ] >> Procedure

Removal [08/2015 - ]: Procedure

  1. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

  2. REMOVE INTAKE MANIFOLD 

    (Refer to REMOVAL [08/2015 - ] )

  3. REMOVE FAN SHROUD 

    (Refer to REMOVAL [08/2015 - ] )

  4. REMOVE NO. 9 WATER BY-PASS HOSE 
    1. GTY554408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Slide the 2 clamps and remove the No. 9 water by-pass hose from the separator case and front water by-pass joint.

      TEXT IN ILLUSTRATION

      *1 No. 9 Water By-pass Hose
      *2 No. 10 Water By-pass Hose
  5. REMOVE NO. 10 WATER BY-PASS HOSE 
    1. Slide the 2 clamps and remove the No. 10 water by-pass hose from the separator case and front water by-pass joint.
  6. REMOVE NO. 1 WATER BY-PASS HOSE 
    1. GTY568209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Slide the 2 clamps and remove the No. 1 water by-pass hose from the front water by-pass joint and water inlet housing.

      TEXT IN ILLUSTRATION

      *1 No. 1 Water By-pass Hose
      *2 No. 2 Water By-pass Hose
  7. DISCONNECT NO. 2 WATER BY-PASS HOSE 
    1. Slide the clamp and disconnect the No. 2 water by-pass hose from the water by-pass joint.
  8. DISCONNECT WATER BY-PASS PIPE HOSE (w/ Trailer Towing System) 
    1. Remove the 3 bolts and disconnect the water by-pass pipe hose.
      GTY611620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE NO. 2 CYLINDER HEAD COVER 
    GTY577665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the No. 2 cylinder head cover.
  10. DISCONNECT FUEL TUBE CLAMP 
    1. Disconnect the fuel tube clamp from the bracket.
      GTY608815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE NO. 1 ENGINE COVER 
    GTY125879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the No. 1 engine cover.
  12. REMOVE FRONT WATER BY-PASS JOINT 
    1. Disconnect the engine coolant temperature sensor connector.
    2. Remove the 4 nuts, front water by-pass joint and 2 gaskets.
      GTY578727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. REMOVE NO. 3 WATER BY-PASS PIPE 
    GTY577662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    Perform this procedure only when replacement of the No. 3 water by-pass pipe is necessary.

    1. Remove the bolt and No. 3 water by-pass pipe.
  14. REMOVE AIR PIPE SUB-ASSEMBLY 
    1. Slide the 2 clamps and disconnect the No. 2 air injection system hose and No. 3 air injection system hose.
      GTY596134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 No. 2 air injection system hose
      *2 No. 3 air injection system hose
    2. Disconnect the electric air control valve connector.
    3. Disconnect the electric air control valve connector clamp holder.
    4. Using a clip remover, detach the wire harness claw.
    5. Remove the 2 bolts and air pipe.
      GTY589048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the 2 No. 1 air hoses from the electric air control valve assembly.
  15. REMOVE ELECTRIC AIR CONTROL VALVE ASSEMBLY 
    1. Disconnect the knock sensor connector.
      GTY611362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and bracket.
    3. Disconnect the 2 electric air control valve connectors.
    4. Remove the 3 bolts and electric air control valve assembly.
      GTY608818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE NO. 2 AIR TUBE 
    1. Remove the 2 bolts, No. 2 air tube and gasket.
      GTY125880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Be careful not to damage the installation surface of the gaskets.

  17. REMOVE NO. 3 AIR TUBE 
    1. Remove the 2 bolts, No. 3 air tube and gasket.
      GTY141918Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Be careful not to damage the installation surface of the gaskets.

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