DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Fuel System (A25A-FXS) - Service Information (1 Of 2)) >> FUEL INJECTOR (for Port Injection) >> Installation [11/2023 - ] >> Procedure

Installation [11/2023 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. INSTALL PORT FUEL INJECTOR ASSEMBLY 

    HINT: 

    Perform "Inspection After Repair" after replacing a port fuel injector assembly.

    Refer to INITIALIZATION [10/2021 - ]

    1. Apply a light coat of spindle oil or gasoline to 4 new O-rings, and install one to each port fuel injector assembly.
      NOTE:

      Check that there is no damage or foreign matter on the groove of the port fuel injector assembly when installing the O-ring to each port fuel injector assembly.

    2. Install the 4 port fuel injector assemblies to the fuel delivery pipe sub-assembly.
      GTY741490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Stopper
      *b Claw
      NOTE:
      • Make sure that the port fuel injector assembly is located within the stopper as shown in the illustration.
      • Check that the port fuel injector assembly installation holes of the fuel delivery pipe sub-assembly are not damaged and are free of foreign matter.
      • Make sure that the O-ring is not damaged, twisted or moved out of place when installing the port fuel injector assembly.
  2. INSTALL NO. 5 ENGINE WIRE 
    1. Engage the 2 clamps to install the No. 5 engine wire to the fuel delivery pipe sub-assembly.
    2. Connect the 4 port fuel injector assembly connectors and No. 2 fuel pressure sensor connector.
  3. INSTALL INJECTOR VIBRATION INSULATOR 
    1. Install 4 new injector vibration insulators to the cylinder head sub-assembly.
  4. INSTALL NO. 1 DELIVERY PIPE SPACER 
    1. Install the 2 No. 1 delivery pipe spacers to the cylinder head sub-assembly.
      GTY764862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Fuel Delivery Pipe Sub-assembly Side
      *b Cylinder Head Sub-assembly Side
      NOTE:

      Install the No. 1 delivery pipe spacers in the correct direction.

  5. INSTALL FUEL DELIVERY PIPE SUB-ASSEMBLY 
    1. Place the fuel delivery pipe sub-assembly with the 4 port fuel injector assemblies onto the cylinder head sub-assembly.
      NOTE:

      Be careful not to drop the port fuel injector assemblies when installing the fuel delivery pipe sub-assembly.

    2. Install the fuel delivery pipe sub-assembly with the port fuel injector assemblies with the 2 bolts.

      Torque: 28.5 N.m (291 kgf/cm, 21 ft.lbf) 

    3. Connect the No. 5 engine wire connector.
  6. TEMPORARILY INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 1

  7. TEMPORARILY INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 
    NOTE:

    Do not damage the seals of the union nuts of the No. 1 fuel pipe sub-assembly.

    1. for Cylinder Head Cover Sub-assembly Connection Type:
      1. Temporarily install the bolt.
    2. Temporarily install the No. 1 fuel pipe sub-assembly to the fuel delivery pipe and tighten the union nut by hand.
    3. Temporarily install the No. 1 fuel pipe sub-assembly to the fuel pump assembly and tighten the union nut by hand.
  8. INSTALL FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 3

  9. INSTALL NO. 1 FUEL PIPE SUB-ASSEMBLY 
    1. for EGR Valve Bracket Connection Type:
      1. Using a 17 mm union nut wrench, tighten the union nut on the fuel delivery pipe side of the No. 1 fuel pipe sub-assembly.
        GTY901020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 17 mm Union Nut Wrench
        *b Torque Wrench Fulcrum Length

        Specified tightening torque 

        Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

        NOTE:

        Do not adjust the torque in the loosening direction.

        HINT: 

        • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

          Refer to PRECAUTION [11/2023 - ]

        • When using a 17 mm union nut wrench (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)): 30 N.m (306 kgf/cm, 22 ft.lbf)
      2. Using a 17 mm union nut wrench, tighten the union nut on the fuel pump assembly side of the No. 1 fuel pipe sub-assembly.

        Specified tightening torque 

        Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

        NOTE:

        Do not adjust the torque in the loosening direction.

        HINT: 

        • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

          Refer to PRECAUTION [11/2023 - ]

        • When using a 17 mm union nut wrench (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)): 30 N.m (306 kgf/cm, 22 ft.lbf)
    2. for Cylinder Head Cover Sub-assembly Connection Type:
      1. Using a 17 mm union nut wrench, tighten the union nut on the fuel delivery pipe side of the No. 1 fuel pipe sub-assembly.
        GTY1002246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 17 mm Union Nut Wrench
        *b Torque Wrench Fulcrum Length
        Union Nut
        Bolt

        Specified tightening torque 

        Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

        NOTE:

        Do not adjust the torque in the loosening direction.

        HINT: 

        • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

          Refer to PRECAUTION [11/2023 - ]

        • When using a 17 mm union nut wrench (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)): 30 N.m (306 kgf/cm, 22 ft.lbf)
      2. Using a 17 mm union nut wrench, tighten the union nut on the fuel pump assembly side of the No. 1 fuel pipe sub-assembly.

        Specified tightening torque 

        Torque: 35 N.m (357 kgf/cm, 26 ft.lbf) 

        NOTE:

        Do not adjust the torque in the loosening direction.

        HINT: 

        • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

          Refer to PRECAUTION [11/2023 - ]

        • When using a 17 mm union nut wrench (fulcrum length of 30 mm (1.18 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)): 30 N.m (306 kgf/cm, 22 ft.lbf)
      3. Using an 8 mm socket wrench, tighten the bolt.

        Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

    3. Connect the ignition coil connector.
  10. CONNECT FUEL TUBE SUB-ASSEMBLY 
    1. Connect the fuel tube sub-assembly to the fuel pump assembly and fuel delivery pipe sub-assembly.

      Refer to PRECAUTION [11/2023 - ]

    2. Install the fuel pipe clamp to the fuel tube connector.
  11. INSTALL NO. 2 WATER BY-PASS PIPE 

    Refer to PROCEDURE - Step 6

  12. INSTALL EGR VALVE ASSEMBLY 

    Refer to INSTALLATION [10/2021 - ]

  13. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY 

    Refer to INSTALLATION [09/2020 - ]

  14. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to PROCEDURE - Step 2

  15. INSTALL BATTERY SERVICE HOLE COVER 

    Refer to PROCEDURE - Step 66

  16. INSPECT FOR FUEL LEAK 

    Refer to PROCEDURE - Step 1

  17. PERFORM INITIALIZATION 
    1. Perform "Inspection After Repair" after replacing a port fuel injector assembly.

      Refer to INITIALIZATION [10/2021 - ]

  18. INITIALIZATION AFTER RECONNECTING AUXILIARY BATTERY TERMINAL 

    HINT: 

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [11/2023 - ]