Fuel System: Precaution

CAUTION:

Before working on the fuel system, disconnect the cable from the negative (-) battery terminal.
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
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.

NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

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 piece of cloth or equivalent over fittings as you separate them to reduce the risk of fuel spray on yourself or in the engine compartment.
- Allow the engine to cool down before performing the following procedures, as the high pressure side's fuel pressure does not decrease until the engine cools down.
NOTE: Perform these procedures with the engine coolant temperature at 60°C (140°F) or less.
1. for Power Seat:
  Remove the rear seat assembly LH (see REMOVAL ).
2. for Ottoman:
  Remove the rear seat assembly LH (see REMOVAL ).
3. for Fixed Seat Type:
  Remove the rear seat assembly (see REMOVAL ).
4. Disconnect the fuel pump connector.
5. Start the engine.
6. After the engine has stopped on its own, turn the engine switch off.
  HINT:
  
  DTC P3190, P3191, P0171, P0172 and/or P0A0F may be set.
7. Loosen the fuel tank cap, then discharge the pressure in the fuel tank completely.
8. Connect the fuel pump connector.
9. for Power Seat:
  Install the rear seat assembly LH (see INSTALLATION ).
10. for Ottoman:
  Install the rear seat assembly LH (see INSTALLATION ).
11. for Fixed Seat Type:
  Install the rear seat assembly (see INSTALLATION ).
FUEL SYSTEM
1. When disconnecting the fuel pressure line, a large amount of gasoline will spill out. Follow the following 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 Fuel Pump Tube With Plastic Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Observe the following precautions when disconnecting the fuel tube connector (for quick type A).
  1. for Fuel Pipe Clamp Type:
    Remove the fuel pipe clamp.
    
    Fig 3: Locating Fuel Tube Connector (Quick Type A)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. for Retainer Type:
    Pull up the retainer to release the lock.
    
    Fig 4: Pulling Up Retainer
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Check for foreign matter on the pipe and around the connector before disconnecting it. Clean it if necessary.
  4. Pinch the connector and disconnect the connector and pipe.
  5. 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.
    
    Fig 5: Pinching Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
  7. To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
    
    Fig 6: Covering Disconnected Pipe And Connector With Plastic Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Observe the following precautions when connecting the fuel tube connector (for quick type A).
  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 to 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. W/ Fuel Pipe Clamp Type:
  Install the fuel pipe clamp.
5. for Retainer Type:
  Push down the retainer to lock it.
6. Observe the following precautions when disconnecting the fuel tube connector (for 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 the connector 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 and pull the connector to disconnect it.
  4. Check for foreign matter on the seal surface of the disconnected pipe. Clean it if necessary.
  5. To protect the disconnected pipe and connector from damage and foreign matter, cover it with a plastic bag.
    
    Fig 11: Identifying From Damage And Foreign Matter, Cover With Plastic Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Observe the following precautions when connecting the fuel tube connector (for quick type B).
  1. Check for foreign matter on the pipe and around the connector before connecting it. Clean it if necessary.
  2. Align the axis of the connector with the axis of the pipe. Push the pipe into the connector, and push up on the retainer.
    
    Fig 12: Pushing Up On Retainer
    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.
CHECK FOR FUEL LEAKS
1. Check that there are no fuel leaks anywhere on the fuel system after performing maintenance (see ON-VEHICLE INSPECTION ).
  
  Fig 13: Checking For Fuel Leaks
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002