2007 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Fuel System: Precaution

  1. PRECAUTION 
    1. Before inspecting and repairing the fuel system, disconnect the cable from the negative (-) battery terminal.
    2. Do not smoke or work near fire when handling the fuel system.
    3. Keep gasoline away from rubber or leather parts.
  2. DISCHARGE FUEL SYSTEM PRESSURE 
    CAUTION:
    • Perform the following procedures to prevent fuel from spilling out before removing any fuel system parts.
    • Pressure will still remain in the fuel line even after performing the following procedures. When disconnecting the fuel line, cover it with a shop rag or a piece of cloth to prevent fuel from spraying or coming out.
    1. Remove the rear seat cushion assembly.
    2. Remove the rear floor service hole cover.
    3. Disconnect the fuel pump connector.
    4. Start the engine.
    5. After the engine stops, turn the engine switch off.

      HINT:

      DTC P0171/25 (fuel problem) may be detected.

    6. Crank the engine again. Check that the engine does not start.
    7. Remove the fuel tank cap to discharge pressure from the fuel tank.
      Fig 1: Locating Fuel Pump Connector And Rear Floor Service Hole Cover
      G04974865Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Disconnect the cable from the negative (-) battery terminal.
    9. Reconnect the fuel pump connector.
    10. Install the rear floor service hole cover.
    11. Install the rear seat.
  3. FUEL SYSTEM 
    1. When disconnecting the high pressure fuel line, a large amount of gasoline will spill out, so observe the following procedures:
      1. Discharge the fuel system pressure (step 2).
      2. Disconnect the fuel pump tube (See REMOVAL  ).
      3. Drain the fuel that remains in the fuel pump tube.
      4. To protect the disconnected fuel pump tube from damage and contamination, cover it with a plastic bag.
      5. Put a container under the connectors.
        Fig 2: Covering Fuel Pump Main Tube From Plastic Bag
        G04974866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Observe the following precautions when removing and installing the fuel injectors:
      1. Never reuse an O-ring.
      2. When placing a new O-ring on the injector, do not damage the O-ring.
      3. Coat a new O-ring with spindle oil or gasoline before installing it.
        NOTE: Do not use engine oil, gear oil or brake fluid.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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