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Home >> Subaru >> 2022 >> WRX Base, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Fuel Sub Level Sensor >> Installation
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Fuel Sub Level Sensor: Installation

  1. Install a new gasket to the fuel tank.
    G12391597Courtesy of SUBARU OF AMERICA, INC.
  2. Install the fuel sub delivery tube to the fuel sub level sensor.
    G13198390Courtesy of SUBARU OF AMERICA, INC.
  3. Set the fuel sub level sensor to the position shown in the figure.
    CAUTION:
    • Be careful not to spill any fuel over the gasket. If any fuel is spilled onto the gasket, wipe it off completely. Otherwise the fuel sub level sensor may rotate together with the ring nut. 
    • Set the fuel sub level sensor while paying attention to prevent its arm and float from contacting the fuel tank. If the arm of the fuel sub level sensor is bent, the fuel gauge may not read correctly. 
    G14601139Courtesy of SUBARU OF AMERICA, INC.
  4. Set a new ring nut plate.
    G12391600Courtesy of SUBARU OF AMERICA, INC.
  5. Set a new ring nut, and align the fuel tank installation start position mark (A) with the ring nut position mark (B).
    NOTE:
    • Make sure that the ring nut, ring nut plate and gasket are set as shown in the figure. 
      G14601141Courtesy of SUBARU OF AMERICA, INC.
    • Set the ring nut by firmly pressing against the fuel tank. 
    G14601142Courtesy of SUBARU OF AMERICA, INC.
  6. Using the ST, tighten the ring nut by one turn, and then tighten until the ring nut position mark is located within the installation end position range mark on the fuel tank.
    CAUTION:
    • Make sure that the ring nut position mark is located within the installation position end range mark on the fuel tank as shown in the figure. 
    • Make sure that the position mark on the fuel sub level sensor is located within the installation position range mark on the fuel tank as shown in the figure. 

    Preparation tool: 

    ST: ST FUEL PUMP (42099FL000)

    G14601143Courtesy of SUBARU OF AMERICA, INC.
  7. Using a caliper with depth gauge, measure the dimension (3 positions) of the ring nut and the top of fuel tank to check the tightening condition of the ring nut.
    CAUTION:
    • If the measured value exceeds the standard, retighten the ring nut to correct erroneous tightening of the ring nut. 
    • If the ring nut and ring nut plate are deformed, cracked or damaged, replace them with new parts. 

    Dimension of ring nut and top of fuel tank: 

    Standard 

    21.3 - 26.3 mm (0.839 - 1.035 in)

    G14601144Courtesy of SUBARU OF AMERICA, INC.
  8. Set the gasket and install the grommets.
    CAUTION:
    • If the gasket is damaged, replace it with a new part. 
    • Make sure that the gasket is installed in the correct orientation. 
    • Make sure that the grommets are fully inserted. 
    NOTE:

    If the threaded portion of grommet is faulty, replace the grommet with a new part. 

    G14601134Courtesy of SUBARU OF AMERICA, INC.
  9. Connect the connector to the fuel sub level sensor.
    CAUTION:

    Before connecting, make sure that there are no foreign matters, water, etc. inside the connectors of fuel sub level sensor and harness. If any foreign matters, water, etc. are found, remove them with air blow and connect the connector after it has dried completely. 

    G14601080Courtesy of SUBARU OF AMERICA, INC.
  10. Install the service hole cover LH.
    G13618538Courtesy of SUBARU OF AMERICA, INC.
  11. Install the rear seat cushion. Ref. to SEATS>REAR SEAT>INSTALLATION
  12. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY
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