Fuel System: Precaution

HINT:

The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this article.

1. Do not work near an open flame.
2. Keep gasoline away from rubber and leather parts.
3. Perform the "DISCHARGE FUEL SYSTEM PRESSURE" procedures below before disconnecting the fuel line to prevent gasoline from spilling out.

1. Remove the rear console box sub-assembly (see REMOVAL ).
2. Disconnect the fuel pump and sender gauge connector.
3. Start the engine. After the engine has stopped, turn the ignition switch off.

   HINT:

   DTC P0171/P0172 (system too lean) is output, clear the DTC (see DTC CHECK/CLEAR ).

4. Check that the engine does not start.
5. Remove the fuel tank cap, and let the air out of the fuel tank.
   Fig 1: Locating Fuel Pump And Sender Gauge Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Connect the fuel pump and sender gauge connector.
7. Install the rear console box sub-assembly (see INSTALLATION ).

1. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe the following procedures:
   1. Discharge the fuel system pressure.
   2. Disconnect the fuel pump main tube (see REMOVAL  ).
      Fig 2: Locating Fuel Pump And Sender Gauge Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Drain the fuel that remains inside the fuel pump main tube.
   4. To protect the disconnected fuel pump main tube from damage and contamination, cover it with a plastic bag.
   5. Put a container under the connection part.
      Fig 3: Covering Fuel Pump Main Tube From Plastic Bag

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Observe the following precautions when disconnecting the fuel tube connectors (quick type A):
   1. Remove the No. 1 fuel pipe clamp.
      Fig 4: Pushing Fuel Tube Connector (Quick Type A)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Check that there is no dirt or other foreign objects on the pipe and around the connector before disconnecting them. Clean them if necessary.
   3. Disconnect the connector from the pipe by hand.
   4. When the connector and the pipe are stuck, push in and pull on the connector to release it and pull the connector out of the pipe carefully.
   5. Check that there is no dirt or other foreign objects on the sealing surface of the disconnected pipe. Clean it away if necessary.
      Fig 5: Pushing Fuel Tube Connector To Fuel Pipe

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Do not damage the disconnected pipe or connector, and prevent intrusion of foreign objects by covering them with a plastic bag.
      Fig 6: Covering Pipe And Connector With Plastic Bag

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Observe the following precautions when connecting the fuel tube connectors (quick type A):
   1. Check that there is no damage or foreign objects in the connected part of the pipe.
   2. Match the axis of the connector with the axis of the pipe, and push the pipe into the connector until the connector makes a "click" sound. If the connection is tight, apply a small amount of fresh engine oil to the tip of the pipe.
   3. After finishing the connection, check if the pipe and the connector are securely connected by pulling on them.
   4. Check for fuel leaks.
      Fig 7: Push Pipe Into Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Observe the following precautions when disconnecting the fuel tube connector (quick type B):
   1. Check that there is no dirt or other foreign objects around the connector before disconnecting the fuel pump tube.
   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 8: 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 on the connector to disconnect it.
   4. Check that there is no dirt or other foreign objects on the sealing surface of the disconnected pipe.
      Fig 9: Checking Sealing Surface Of Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Do not damage the connector or pipe, and prevent intrusion of foreign objects by covering them with a plastic bag.
      Fig 10: Covering Connector And Pipe With Plastic Bag (Quick Type B)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Observe the following precautions when disconnecting the fuel tube connector (quick type B):
   1. Match the axis of the connector with the axis of the pipe. Push the pipe into the connector and push up on the retainer.

      HINT:

      If it is hard to make the connection, apply a small amount of engine oil to the tip of the pipe.

      Fig 11: Disconnecting Fuel Tube Connector (Quick Type B)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. After finishing the connection, pull on the connector and pipe and make sure that they are securely connected.
   3. Check for fuel leaks.
6. Observe the following precautions when handling a nylon tube:
   CAUTION:

   • Do not twist the connection part of the nylon tube and the quick connector when connecting them.
   • Do not bend, kink or twist the nylon tube.
   • Do not remove the EPDM protector on the outside of the nylon tube.
   • Do not close the piping by bending the nylon tube.

1. Make sure that there are no fuel leaks after performing maintenance on the fuel system.
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON and turn the Techstream main switch on.
      NOTE: Do not start the engine.
   3. Select the Active Test mode on the Techstream.
   4. Check that there are no leaks from the fuel system.
   5. Turn the ignition switch off.
   6. Disconnect the Techstream from the DLC3.