Sentra 2007

Removal & Installation

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Be sure to read -General Precautions- before working on the fuel system. Refer to Precautions in the General Information Section.

  1. Check fuel level with the vehicle on a level surface. If the fuel gauge indicates more than the level as shown (7/8 full), drain fuel from the fuel tank until the fuel gauge indicates level as shown (7/8 full) in the accompanying illustration.
    NOTE
    Fuel will be spilled when removing fuel pump assembly if fuel level is above the fuel pump assembly installation surface.


    NOTE
    As a guide, fuel level is at the level as shown (in the accompanying illustration) or below when approximately 3 1/8 gal of fuel is drained from a full fuel tank.


    NOTE
    In case fuel pump does not operate, perform the following procedure.



    Click image to see an enlarged view

    Fig. Check fuel level with the vehicle on a level surface. If the fuel gauge indicates more than the level as shown (7/8 full), drain fuel from the fuel tank until the fuel gauge indicates level as shown (7/8 full) in the accompanying illustration

    1. Insert fuel tubing of less than 0.98 in. (25 mm) in diameter into fuel filler tube through fuel filler opening to drain fuel from fuel filler tube.
    2.  
    3. Disconnect fuel filler hose from fuel filler tube.
    4.  
    5. Insert fuel tubing into fuel tank through fuel filler hose to drain fuel from fuel tank.
    6.  

  2.  
  3. Open fuel door and unscrew the fuel filler cap to release the pressure inside the fuel tank.
  4.  
  5. Release the fuel pressure from the fuel lines. Refer to Gasoline Fuel Injection System in the Fuel Systems Section.
  6.  
  7. Disconnect battery negative terminal.
  8.  
  9. Remove rear seat bottom. Refer to Seats in the Body Section
  10.  
  11. Turn the three retainers (A) 90°in a clockwise direction and remove the fuel pump inspection hole cover.
  12.  
  13. Disconnect electrical connector and fuel feed hose quick connector.
    1. Fuel feed hose.

      Click image to see an enlarged view

      Fig. Disconnect electrical connector (A) and fuel feed hose quick connector (B).

    2.  
    3. Disconnect the quick connector using the following procedure:
      NOTE
      The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.


      NOTE
      Do not use any tools to remove the quick connector.


      NOTE
      Keep resin tube away from heat. Be especially careful when welding near the resin tube.


      NOTE
      Prevent acid liquid such as battery electrolyte, from getting on resin tube.


      NOTE
      Do not bend or twist resin tube during installation and removal.


      WARNING
      To keep the connecting portion clean, free of foreign materials and to avoid damage, cover them completely with plastic bags or something similar.


      WARNING
      Do not insert plug to prevent damage to O-ring in quick connector.



      Hold the sides of the connector, push in tabs and pull out the tube.
       
      If quick connector and tube on fuel pump assembly are stuck, push and pull several times until they move. Disconnect them by pulling.

      Click image to see an enlarged view

      Fig. If quick connector and tube on fuel pump assembly are stuck, push and pull several times until they move. Disconnect them by pulling.

       



      Click image to see an enlarged view

      Fig. To keep the connecting portion clean, free of foreign materials and to avoid damage, cover them completely with plastic bags or something similar.

    4.  

  14.  
  15. Remove the lock ring using Tool J-45722 as shown in the accompanying illustration.

    Click image to see an enlarged view

    Fig. Remove the lock ring using Tool J-45722 (A) as shown.

  16.  
  17. Remove fuel level sensor unit, fuel filter and fuel pump assembly.
    NOTE
    Do not bend float arm during removal.


    NOTE
    Do not allow foreign materials to fall into fuel tank. Use a lint free cloth when handling components.


    NOTE
    Avoid impacts such as dropping when handling components.



    Click image to see an enlarged view

    Fig. Remove fuel level sensor unit, fuel filter and fuel pump assembly (1).



    Click image to see an enlarged view

    Fig. Exploded view of the fuel level sensor unit, filter and fuel pump assembly

  18.  

INSPECTION AFTER REMOVAL

Make sure that the fuel level sensor unit, fuel filter and fuel pump is free from defects and foreign materials.

To install:

Fuel Level Sensor Unit, Fuel Filter and Fuel Pump Assembly

  1. Install O-ring to fuel tank without twisting.
  2.  
  3. Install fuel level sensor unit, fuel filter and fuel pump assembly as shown in the accompanying illustration.

    Click image to see an enlarged view

    Fig. Install fuel level sensor unit, fuel filter and fuel pump assembly (Arrow=Vehicle front)

    1. Turn the lock ring using Tool J-45722 until the lock ring is fully rotated into the fuel tank lock tabs.

      Click image to see an enlarged view

      Fig. Turn the lock ring (1) using Tool J-45722 until the lock ring is fully rotated into the fuel tank lock tabs (A) as shown.

    2.  

  4.  

Quick Connector

  1. Check the connection for damage or any foreign materials.
  2.  
  3. Align the connector with the tube, then insert the connector straight into the tube until a -click- sound is heard.
  4.  
  5. After connecting, make sure that the connection is secure using the following procedure.
    1. Visually confirm that the two retainer tabs are secured to the connector.
    2.  
    3. Pull the tube and the connector to make sure they are securely connected.

      Click image to see an enlarged view

      Fig. After connecting, make sure that the connection is secure using the following procedure. Visually confirm that the two retainer tabs are secured to the connector. Pull the tube and the connector to make sure they are securely connected.

    4.  

  6.  

Inspection Hole Cover

  1. Before installing inspection hole cover, confirm that there are no fuel leaks. Refer to Fuel Tank in the Fuel Systems Section.
  2.  
  3. Install inspection hole cover with the front mark facing front of vehicle.
  4.  
  5. Lock clips by turning counterclockwise.

    Click image to see an enlarged view

    Fig. Install inspection hole cover with the front mark (arrow) facing front of vehicle. Lock clips (A) by turning counterclockwise

  6.  
  7. Install rear seat bottom. Refer to Seats in the Body Section
  8.  
  9. Connect battery negative terminal.
  10.  

INSPECTION AFTER INSTALLATION

Use the following procedure to check for fuel leaks.

  1. Turn ignition switch -ON- (without starting the engine), to check the connections for fuel leaks with the electric fuel pump applying pressure to the fuel piping.
  2.  
  3. Start the engine and let it idle to check that there are no fuel leaks at the fuel system connections.
  4.  

 
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