SFI System: Precaution

HINT:

Any diagnostic trouble code retained by the computer will be erased when the negative (-) terminal cable is removed from the battery.

Therefore, if necessary, read the diagnosis before removing the negative (-) terminal cable from the battery.

1. In event of engine misfire, these precautions should be taken.
   1. Check proper connection to battery terminals, etc.
   2. After repair work, check that the ignition coil terminals and all other ignition system lines are reconnected securely.
   3. When cleaning the engine compartment, be especially careful to protect the electrical system from water.
2. Precautions when handling the oxygen sensor.
   1. Do not allow oxygen sensor to drop or hit against an object.
   2. Do not allow the sensor to come into contact with water.

If the vehicle is equipped with a mobile communication system, See GENERAL INFORMATION .

1. Separation of the engine oil dipstick, oil filler cap, PCV hose, etc. may cause the engine to run out of tune.
2. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause the engine to run out of tune.

1. Before removing SFI wiring connectors, terminals, etc., first disconnect the power by either turning the ignition switch to LOCK or disconnecting the negative (-) terminal cable from the battery.

   HINT:

   Always check the diagnostic trouble code before disconnecting the negative (-) terminal cable from the battery.

2. When installing the battery, be especially careful not to incorrectly connect the positive (+) and negative (-) cables.
3. Do not permit parts to receive a severe impact during removal or installation. Handle all SFI parts carefully, especially the ECM.
4. Do not be careless during troubleshooting as there are numerous transistor circuits and even slight terminal contact can cause further troubles.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to prevent entry of water. Also, when washing the engine compartment, prevent water from getting on the SFI parts and wiring connectors.
7. Parts should be replaced as an assembly.
8. Care is required when pulling out and inserting wiring connectors.
   1. Release the lock and pull out the connector, pulling on the connectors.
   2. Fully insert the connector and check that it is locked.
9. Use SST for inspection or test of the injector or its wiring connector.

   SST 09842-30070

Fig 1: Identifying SST

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe the following procedures:
   1. Disconnect the fuel pump connector.
   2. Start the engine. After the engine has stopped on its own, turn the ignition switch to LOCK.
      Fig 2: Disconnecting Fuel Pump Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Put a container under the connection.
   4. Slowly loosen the connection.
   5. Disconnect the connection.
   6. Plug the connection with a rubber plug.
   Fig 3: Putting Container Under Connection

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. When connecting the union bolt on the high pressure pipe union, observe the following procedures:
   1. Always use 2 new gaskets.
   2. Tighten the union bolt by hand.
   3. Tighten the union bolt to the specified torque.

      Torque: 29 N.m (300 kgf.cm, 21 ft.lbf) 

   Fig 4: Connecting Union Bolt On High Pressure Pipe Union

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. When connecting the flare nut on the high pressure pipe union, observe the following procedures:
   1. Apply a light coat of engine oil to the flare nut, and tighten the flare nut by hand.
   2. Using SST, tighten the flare nut to specified torque.

      SST 09023-12700

   NOTE: Do not rotate the fuel pipe, when tightening the flare nut.

   Torque: 28 N.m (285 kgf.cm, 21 ft.lbf) 

   HINT:

   Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).

   Fig 5: Tightening Flare Nut

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Observe the following precautions when removing and installing the injectors.
   1. Never reuse the O-ring.
   2. When placing a new O-ring on the injector, take care not to damage it in any way.
   3. Coat a new O-ring with spindle oil or gasoline before installing-never use engine, gear or brake oil.
   Fig 6: Identifying Correct Way Of Removing And Installing Injectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Install the injector to the delivery pipe and intake manifold as shown in Fig 7 .
6. Observe these precautions when disconnecting the fuel tube connector (quick type).
   1. Check if there is any dirt like mud on the pipe and around the connector before disconnecting them and clean the dirt away.
   2. Be sure to disconnect with hands.
      Fig 7: Installing Injector To Delivery Pipe

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. When the connector and the pipe are stuck, pinch the retainer between the hands, push and pull the connector to free to disconnect and pull it out. Do not use any tool at this time.
   4. Inspect if there is any dirt or the likes on the seal surface of the disconnected pipe and clean it away.
      Fig 8: Disconnecting Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Prevent the disconnected pipe and connector from damaging and mixing foreign objects by covering them with a vinyl bag.
   Fig 9: Covering Pipe And Connector With Vinyl Bag

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Observe these precautions when connecting the fuel tube connector (quick type).
   1. Do not reuse the retainer removed from the pipe.
   2. Must use hands without using tools when to remove the retainer from the pipe.
   3. Check if there is any damage or foreign objects on the connected part of the pipe.
      Fig 10: Identifying Retainer

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Match the axis of the connector with axis of the pipe, and push in the connector until the retainer makes a "click" sound. In case that the connections is tight, apply little amount of new engine oil on the tip of the pipe.
   5. After having finished the connection, check if the pipe and the connector are securely connected by pulling them.
   6. Check if there is any fuel leakage.
   Fig 11: Checking Pipe

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Observe these precautions when handling nylon tube.
   1. Pay attention not to turn the connector with force when connecting them.
   2. Pay attention not to kink the nylon tube.
   3. Do not remove the EPDM protector on the outside of the nylon tube.
   4. Must not close the piping with the nylon tube by bending it.

      Before installing the injector, must apply spindle oil or gasoline on the place where a delivery pipe or an intake manifold touches an O-ring of the injector.

9. Check that there are no fuel leaks after performing maintenance anywhere on the fuel system.
   1. Connect a TOYOTA hand-held tester to the DLC3.
   2. Turn the ignition switch ON and TOYOTA handheld tester main switch ON.
      Fig 12: Connecting Toyota Hand-Held Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: Do not start the engine.
   3. Select the active test mode on the TOYOTA handheld tester.
   4. Please refer to the TOYOTA hand-held tester operator's manual for further details.
   5. If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See FUEL PUMP ).
   6. Check that there are no leaks from any part of the fuel system.
   7. Turn the ignition switch to LOCK.
   8. Disconnect the TOYOTA hand-held tester from the DLC3.