Fuel System Precaution

Disconnect the fuel pump ECU connector (Click here).

Start the engine. After the engine stops, turn the engine switch off.

HINT:

DTC P0171/0174 (system too lean) may be stored.

Crank the engine again, and then check that the engine does not start.

Loosen the fuel tank cap, and then discharge the pressure in the fuel tank completely.

Disconnect the cable from the negative (-) battery terminal.

NOTICE:

1. After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
   
2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).
   

Connect the fuel pump ECU connector (Click here).

When disconnecting the high fuel pressure line, a large amount of gasoline will spill out. Follow these procedures.

1. Perform the "DISCHARGE FUEL SYSTEM PRESSURE" procedures above.
   

2. Disconnect the fuel tube.
   

3. Drain any fuel remaining inside the fuel tube.
   

4. To protect the disconnected fuel tube from damage and contamination, cover it with a plastic bag.
   

5. Put a container under the connecting part of the pressure line.
   

Observe these precautions when removing and installing the injectors.

NOTICE:

1. Never reuse the O-ring.
   
2. When placing a new O-ring on the fuel injector assembly, do not damage it.
   
3. Coat a new O-ring with spindle oil or gasoline before installing it.
   
4. Do not use engine oil, gear oil or brake oil.
   

Install the fuel injector assembly to the fuel delivery pipe sub-assembly and cylinder head sub-assembly as shown in the illustration.

NOTICE:

Before installing the fuel injector assembly, apply spindle oil or gasoline on the place where the fuel delivery pipe sub-assembly contacts the O-ring of the fuel injector assembly.

Observe these precautions when disconnecting the fuel tube connector (for quick type A).

1. Fuel Hose Connector Cover Type:
   Detach the lock claw by lifting up the cover as shown in the illustration.
   

   Text in Illustration

   *1	Fuel Hose Connector Cover

2. Check for dirt or mud on the pipe and around the connector before disconnection. Clean if necessary.
   





3. Pinch the connector and disconnect the connector and pipe.
   

   Text in Illustration

   *1	Retainer
   	Pinch
   	Pull

   NOTICE:

   
   
   1. Check for foreign matter in the pipe and around the connector. Clean if necessary. Foreign matter may damage the O-ring or cause leaks in the seal between the pipe and connector.
      
   2. Do not use any tools to separate the pipe and connector.
      
   3. Do not forcefully bend or twist the nylon tube.
      
   4. Check for foreign matter on the pipe seal surface. Clean if necessary.
      
   5. Put the pipe and connector ends in plastic bags to prevent damage and foreign matter contamination.
      
   6. If the pipe and connector are stuck together, pinch the connector between your fingers and turn it carefully to disconnect it.
      

   Text in Illustration

   *1	Retainer
   *2	Nylon Tube
   *3	Pipe
   *4	O-ring
   *5	Fuel Tube Connector

   HINT:

   If the connector and pipe are stuck, pinch the connector, push and pull the pipe to disconnect the pipe and pull it out.

4. Check for dirt or mud on the seal surface of the disconnected pipe. Clean if necessary.
   

5. To protect the disconnected pipe and connector from damage and contamination, cover them with a plastic bag.
   

Observe these precautions when connecting the fuel tube connector (for quick type A).

1. Before connecting the connector, check that there is no damage or contamination in the connecting part of the pipe.
   





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 tight, apply a small amount of fresh spindle oil or gasoline to the tip of the pipe.
   

   Text in Illustration

   Push





3. After connecting the pipe and connector, check that the pipe and connector are securely connected by trying to pull them apart.
   

   Text in Illustration

   Pull

4. Fuel Hose Connector Cover Type:
   Attach the lock claws to the connector by pushing down on the cover.
   

5. Check for any fuel leaks.
   

Observe these 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 the retainer out and disconnect the connector from the pipe.
   

   Text in Illustration

   *1	Retainer
   	Push
   	Push Out
   	Pull

   
   

   HINT:

   If the connector and pipe are stuck, pinch the fuel pipe by hand and push and pull the connector to disconnect it.

   Text in Illustration

   	Pull
   	Push

   NOTICE:

   
   
   1. Check for any dirt and foreign matter contamination in the pipe and around the connector. Clean if necessary. Foreign matter may damage the O-ring or cause leaks in the seal between the pipe and connector.
      
   2. Do not use any tools to separate the pipe and connector.
      
   3. Do not allow any scratches or foreign matter on the parts when disconnecting them, as the fuel tube joint contains the O-rings that seal the plug.
      
   4. Check for any dirt and foreign matter on the pipe seal surface. Clean if necessary.
      
   5. Do not forcibly bend, twist or turn the nylon tube.
      
   6. Protect the disconnected part by covering it with a plastic bag and tape after disconnecting the main tube.
      
   7. If the pipe and connector are stuck together, pinch the tube between your fingers and turn it carefully to free it. Then disconnect the main tube.
      

   Text in Illustration

   *1	Pipe
   *2	Retainer
   *3	Nylon Tube
   *4	Connector
   *5	O-ring

3. Check for foreign matter on the seal surface of the disconnected pipe. Clean if necessary.
   

4. To protect the disconnected pipe and connector from damage and foreign matter, cover them with a plastic bag.
   

Observe these 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 if necessary.
   





2. Align the axis of the connector with the axis of the pipe. Push the connector onto the pipe, and then push in the retainer.
   

   Text in Illustration

   *1	Retainer
   	Push In
   	Push

   NOTICE:

   1. Before connecting the tube connectors to the pipes, check if there is any damage or foreign matter in the connectors.
      
   2. After connecting the pipe and connector, check that the pipe and connector are securely connected by trying to pull them apart.
      

   Text in Illustration

   Pull

Observe the following precautions when disconnecting the fuel tube connector (for quick type C).

1. Check for dirt or mud on the fuel tube connector and pipe before disconnection. Clean if necessary.
   





2. Pull the retainer up while pinching it on both sides by hand as shown in the illustration, and disconnect the fuel tube connector from the pipe.
   

   Text in Illustration

   *1	Retainer
   	Push
   	Pull up
   	Pull

   NOTICE:

   Do not use any tools.





3. If the fuel tube connector and pipe are stuck, pinch the fuel pipe by hand and push and pull the connector to disconnect it.
   

   NOTICE:

   Do not use any tools.

4. Check for dirt or mud on the pipe seal after disconnecting the fuel tube. Clean it if necessary.
   

5. Cover the disconnected fuel tube connector and pipe with a plastic bag.
   

   NOTICE:

   Do not allow the fuel tube connector or pipe to be damaged or contaminated by foreign matter.

Observe the following precautions when connecting the fuel tube connector (for quick type C).

1. Align the shaft of the fuel tube connector with the shaft of the pipe, push the fuel tube connector in, and push down the retainer.
   

   Text in Illustration

   *1	Retainer
   	Connect
   	Push down





2. After connecting the fuel tube connector, check that the fuel tube connector and pipe are securely connected by trying to pull them apart.
   

Observe these precautions when handling the nylon tube.

NOTICE:

1. Be careful not to turn the connection part of the nylon tube and quick connector when connecting them.
   
2. Do not kink the nylon tube.
   
3. Do not bend the nylon tube as this may cause blockage.