Fuel System: Precaution

BEFORE WORKING ON FUEL SYSTEM
1. Before working on the fuel system, disconnect the cable from the negative battery terminal.
2. Do not work on the fuel system near naked flames. Never smoke during the work.
3. Keep rubber and leather parts away from gasoline.
DISCHARGE FUEL SYSTEM PRESSURE
CAUTION:
- DISCHARGE FUEL SYSTEM PRESSURE procedures must be performed before disconnecting any part of the fuel system.
- As some pressure remains in the fuel line even after taking precautions to prevent gasoline spillage, use a shop rag or piece of cloth to prevent gasoline splashes when disconnecting the fuel line.
1. Disconnect the cable from the negative battery terminal.
2. Remove the circuit opening relay (see ON-VEHICLE INSPECTION ).
3. Connect the cable to the battery negative terminal.
  Torque: 3.9 N*m (40 kgf*cm, 35 in.*lbf)
4. Start the engine.
5. Turn the ignition switch to ON after the engine stops.
  HINT:
  
  DTC P0171 (system too lean (Bank 1)) or DTC P0174 (system too learn (Bank 2)) may be set.
6. Crank the engine again and check that the engine stops.
7. Remove the fuel tank cap and discharge the pressure in the fuel tank completely.
8. Install the circuit opening relay (see ON-VEHICLE INSPECTION ).
FUEL SYSTEM
1. When disconnecting the high-pressure fuel line, a large amount of gasoline will splash. So take the following precautions.
  1. Discharge the fuel system pressure.
  2. Disconnect the fuel tank main tube (see REMOVAL ).
  3. Drain the fuel remaining in the fuel tank main tube.
  4. Cover the disconnected fuel tank main tube (fuel tube joint and fuel tube connector) with a vinyl bag to prevent damage and the intrusion of foreign objects.
2. Take the following precautions when installing the fuel injector.
  1. Do not reuse the O-ring.
  2. Do not damage a new O-ring when installing it into the fuel injector.
  3. Before installing a new O-ring, apply gasoline or spindle oil.
    NOTE: Do not use engine oil, gear oil or brake oil.
    
    Fig 1: Identifying Correct & Incorrect Installation Of O-Rings
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Install the fuel injector into the fuel delivery pipe and cylinder head.
    NOTE: Apply gasoline or spindle oil to the contact surface of the fuel delivery pipe and fuel injector before installing the fuel injector.
    
    Fig 2: Identifying Fuel Injector With Delivery Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Take the following precautions when disconnecting the fuel tube connector.
  HINT:
  
  The structure of the fuel tube connector is as shown in Fig 3.
  1. Check the fuel tube connector and pipe for dirt and mud before removing the fuel tube connector.
    If dirty, wipe it with a shop rag or piece of cloth.
    
    Fig 3: Identifying Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Pinch the retainer, and pull the fuel tube connector out of the pipe.
    
    Fig 4: Pinching Retainer
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. If the fuel tube connector and pipe are stuck, pinch the pipe, then push and pull the fuel tube connector to release and disconnect it.
    NOTE: Never use any tools.
    
    Fig 5: Pushing & Pulling Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. After removing the fuel tube, check the sealing surface of the pipe for dirt and mud.
    If dirty, wipe it with a shop rag or piece of cloth.
  5. Cover the disconnected fuel tube connector and pipe with a vinyl bag to prevent damage and the intrusion of foreign objects.
4. Take the following precautions when installing the fuel tube connector.
  1. Align the fuel tube connector with the pipe, then push in the fuel tube connector until the retainer makes a "click" sound.
    
    Fig 6: Pushing Fuel Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. After connecting the fuel tube connector, check that the fuel tube connector and pipe are securely connected by pulling them.
    
    Fig 7: Pulling Fuel Tube Connector & Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002