Fuel System: Precaution

NOTE: Before working on the fuel system, disconnect the cable from the negative (-) battery terminal.

CAUTION:

Do not smoke or be near an open flame when working on the fuel system.
Keep gasoline away from rubber or leather parts.
Do not allow fuel to spray when removing the pipe between the high pressure side fuel pump and the fuel injector. The fuel in the pipe is highly pressurized.

DISCHARGE FUEL SYSTEM PRESSURE
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 cloth or equivalent over fittings as you separate them to reduce the risk of fuel spray on yourself or in the engine compartment.
1. Disconnect the cable from the negative (-) battery terminal.
  CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
2. Disconnect the fuel pump connector.
3. Connect the cable to the negative (-) battery terminal.
4. Start the engine. After the engine has stopped on its own, turn the engine switch off.
  HINT:
  
  DTC P0171/P0172 (system too lean) may be set.
5. Crank the engine again, then check that the engine does not start.
6. Loosen the fuel tank cap, then discharge the pressure in the fuel tank completely.
7. Connect the fuel pump connector.
  
  Fig 1: Identifying Fuel Pump Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
FUEL SYSTEM
1. When disconnecting the fuel pressure line, a large amount of gasoline will spill out. Follow these procedures.
  1. Discharge the fuel system pressure.
  2. Put a container under the connection.
  3. Disconnect the fuel pump tube.
  4. Drain the fuel remaining inside the fuel pump tube into the container.
  5. To protect the disconnected fuel pump tube from damage and contamination, cover it with a plastic bag.
    
    Fig 2: Covering With Plastic Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Observe these precautions when disconnecting the fuel tube connector (quick type A).
  1. With fuel pipe clamp type: Remove the fuel pipe clamp.
    
    Fig 3: Identifying Fuel Pipe Clamp
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. With fuel hose connector cover type: Detach the lock claw by lifting up the cover, as shown in the illustration.
  3. Check for foreign matter on the pipe and around the connector before disconnecting it. Clean it if necessary.
    
    Fig 4: Identifying Fuel Hose Connector Cover
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. If the connector and pipe are stuck, pinch the connector, and push and pull the pipe to disconnect them.
    NOTE: Do not use any tools in this procedure.
  5. Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
    
    Fig 5: Checking Foreign Matter On Seal
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
    
    Fig 6: Covering With Plastic Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Observe these precautions when connecting the fuel tube connector (quick type).
  1. Check that there is no damage or foreign matter on the part of the pipe that contacts the connector.
  2. Align the axis of the connector with the axis of the pipe. Push the pipe into the connector until the connector makes a "click" sound. If the connection is too tight, apply a light coat of fresh engine oil on the tip of the pipe.
    
    Fig 7: Pushing Pipe Into Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. After connecting the pipe and connector, try to pull them apart to confirm that they are securely connected.
  4. With fuel hose connector cover: Attach the lock claws to the connector by pushing down on the cover.
    
    Fig 8: Identifying Pipe And Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Observe these precautions when disconnecting the fuel tube connector (quick type B).
  1. Check that there is no damage or foreign matter on the part of the pipe that contacts the connector.
  2. Detach the 2 claws of the connector retainer. Push down on the connector and disconnect it from the pipe.
    HINT:
    
    Be sure to disconnect it by hand.
    
    Fig 9: Detaching Claws Of Connector Retainer
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. If the connector and pipe are stuck, pinch the fuel pipe by hand and push or pull the connector to disconnect it.
  4. Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
    
    Fig 10: Checking Foreign Matter On Seal Surface
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
CHECK FOR FUEL LEAKS
1. Check that there are no fuel leaks after performing maintenance anywhere on the fuel system (see ON-VEHICLE INSPECTION ).
  
  Fig 11: Checking Fuel Leaks
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002