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Home >> Lexus >> 2014 >> IS 350 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (Fuel System (8AR-FTS) - Service Information) >> FUEL INJECTOR (for Direct Injection) >> Removal [08/2015 - ] >> Procedure

Removal [08/2015 - ]: Procedure

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  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Refer to PRECAUTION [08/2015 - 10/2016] , or refer to PRECAUTION [10/2016 - 10/2017] , or refer to PRECAUTION [10/2017 - 09/2020] , or refer to PRECAUTION [09/2020 - ]

  2. DISCHARGE FUEL SYSTEM PRESSURE 

    Refer to PRECAUTION [08/2015 - 09/2020] , or refer to PRECAUTION [09/2020 - ]

  3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [08/2015 - 10/2016] , or refer to INITIALIZATION [10/2016 - 10/2017] , or refer to INITIALIZATION [10/2017 - 09/2020] , or refer to INITIALIZATION [09/2020 - 11/2021] , or refer to INITIALIZATION [11/2021 - 09/2022] , or refer to INITIALIZATION [09/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

  4. REMOVE INTAKE MANIFOLD 

    Refer to REMOVAL [08/2015 - ]

  5. REMOVE NO. 1 FUEL PIPE SUB-ASSEMBLY 

    See step  6

  6. DISCONNECT SENSOR WIRE 
    1. Disconnect the fuel pressure sensor connector.
      GTY678325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts to disconnect the sensor wire from the fuel delivery pipe sub-assembly.
    3. Disconnect the 4 direct fuel injector assembly connectors.
      GTY638942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY 
    NOTE:

    There are 2 types of fuel delivery pipe sub-assemblies.

    1. Remove the 3 bolts, 2 nuts and fuel delivery pipe sub-assembly with the direct fuel injector assemblies.
      NOTE:
      • If fuel intrudes into the combustion chamber, there may be adverse effects to the engine main body.
      • Make sure not to touch or strike the tips of the direct fuel injector assemblies.
      • Pull and remove the fuel delivery pipe sub-assembly in a straight line without tilting it.
      GTY670222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt
      Nut
  8. REMOVE DIRECT FUEL INJECTOR ASSEMBLY 
    1. Secure the fuel delivery pipe sub-assembly in a vise between aluminum plates and pull out the 4 direct fuel injector assemblies.
      NOTE:
      • Pull and remove each direct fuel injector assembly in a straight line to avoid damaging the seal surface of the fuel delivery pipe sub-assembly O-ring.
      • After removing the direct fuel injector assemblies, remove any O-rings, No. 1 fuel injector back-up rings and No. 3 fuel injector back-up rings remaining on the fuel delivery pipe sub-assembly side.
      • Attach a tag or label with the corresponding cylinder number to each direct fuel injector assembly so that they can be installed to their original locations.
      GTY625260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the nozzle holder clamp from each direct fuel injector assembly.
    3. Using needle nose pliers, remove the No. 3 fuel injector back-up ring from each direct fuel injector assembly.
      NOTE:

      Do not damage the area that contacts the O-ring.

    4. Remove the O-ring and No. 1 fuel injector back-up ring from each direct fuel injector assembly.
    5. Remove the C-ring and injector vibration insulator from each direct fuel injector assembly.
  9. REMOVE FUEL INJECTOR SEAL 
    1. Using the tip of needle nose pliers, pinch and pull the fuel injector seal at several points to stretch it.
      GTY401222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Excessively pinching the fuel injector seal may damage the groove of the direct fuel injector assembly.
      • If a direct fuel injector assembly is dropped or the tip of the direct fuel injector assembly is struck, replace it with a new one.
    2. Remove the fuel injector seal from each direct fuel injector assembly.