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PRECAUTION
1. Before working on the fuel system, disconnect the negative (-) terminal cable from the battery.
2. Do not smoke or work near fire when working on the fuel system.
3. Keep gasoline away from rubber or leather parts.
WORK FOR PREVENT GASOLINE FROM SPILLING OUT
CAUTION:
- Do not disconnect any part of the fuel system until you have discharged the fuel system pressure.
- Even after discharging the fuel pressure, place a shop rag or piece of cloth over fittings to prevent fuel splashing on yourself or in the engine compartment when separating the fittings.
1. Remove the circuit opening relay from the engine room relay block.
2. Start the engine. After the engine has stopped on its own, turn the ignition switch OFF.
  HINT:
  
  There is a case that DTC P0171 (system too lean) is output.
3. Check that the engine does not start.
  
  Fig 1: Identifying C/OPN Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the fuel tank cap, and let the air out of the fuel tank.
5. Disconnect the negative (-) terminal cable from the battery.
6. Reinstall the circuit opening relay.
FUEL SYSTEM
1. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe the following procedures:
  1. Disconnect the fuel pump tube (See REMOVAL ).
  2. Drain the fuel remained inside the fuel pump tube.
  3. Do not damage the disconnected pipe and connector, and prevent intrusion of foreign objects by covering them with a plastic bag.
  4. Place a container under the connection.
  Fig 2: Covering Bag Pipe And Connector With Plastic
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. When connecting the union bolt (fuel pressure pulsation damper) on the high pressure pipe union, observe the following procedures:
  1. Always use new gaskets.
  2. Tighten the union bolt by hand.
    
    Fig 3: Identifying Union Bolt Gaskets
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Using SST, tighten the union bolt to the specified torque.
    SST 09612-24014 (09617-24011)
    
    Torque: for use with SST
    
    33 N*m (340 kgf*cm, 24 ft.*lbf)
    
    39 N*m (400 kgf*cm, 29 ft.*lbf)
    
    HINT:
    
    Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
    
    Fig 4: Identifying Torque Wrench Fulcrum Length Of 30 cm (11.81 in.)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Observe the following precautions when removing and installing the injectors:
  1. Never reuse the O-ring.
  2. When placing a new O-ring on the injector, do not damage the O-ring.
  3. Coat the new O-ring with spindle oil or gasoline before installing. Do not use engine oil, gear oil or brake fluid.
  Fig 5: Precautions For Removing And Installing Injectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Install the injector to the delivery pipe and lower intake manifold, as shown in the illustration.
  NOTE: Before installing the injector, apply spindle oil or gasoline where the delivery pipe or intake manifold contacts the O-ring of the injector.

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.

Safety Warning

Fuel System: Precaution

Use the Manual With the Right Hardware

When to See a Mechanic

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