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 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 vehicle is Equipped with Mobile Radio System (HAM, CB, etc.)

If the vehicle is equipped with a mobile communication system, refer to the PRECAUTION .

1. Separation of the engine oil dipstick, oil filler cap, PCV hose, etc. may cause the engine to run out of turn.
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 turn.

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. Be careful during troubleshooting as there are numerous transistor circuit, 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 should be taken 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 09842-30080

Fig 1: Inspecting Or Testing Injector Using 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 these procedures.
   1. Disconnect the fuel pump connector.
      Fig 2: Disconnecting Fuel Pump Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Start the engine. After the engine has stopped on its own, turn the ignition switch to LOCK.
   3. Disconnect the fuel tube (See REMOVAL  ).
   4. Drain the fuel remained inside the fuel tube.
   5. Prevent the disconnected fuel tube from damaging and mixing foreign objects by covering them with a vinyl bag.
      Fig 3: Covering Fuel Tube With Vinyl Bag

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Put a container under the connection.
   Fig 4: Putting Container Under Connection

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Observe these precautions when removing and installing the injector.
   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 5: Precaution When Removing & Installing Injector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Install the injector to the delivery pipe and cylinder head, as shown in Fig 6 . Before in installing the injector, must apply spindle oil or gasoline on the place where a delivery pipe or a cylinder head touches on O-ring of the injector.
   Fig 6: Installing Injector To Delivery Pipe & Cylinder Head

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Observe these precautions when disconnecting the fuel delivery pipe. The structure of the metallic connector is shown in Fig 7 .
   1. Remove the fuel pipe clamp.
      Fig 7: Removing Fuel Pipe Clamp

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Get the metallic connector of the fuel tube assembly, pull it out towards the rear and hold it as it is.
   3. Assemble SST to the connection as shown in Fig 8.

      SST 09268-21010

      Fig 8: Assembling SST To Connection

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Turn SST, align the retainers inside the connector with SST chamfered parts and insert SST into the connector.
      Fig 9: Aligning Retainers Inside Connector With SST Chamfered Parts

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Hold SST as it at step 4, push the connector towards SST to put the retainers on SST chamfered parts.
   6. Slide SST and the connector together towards the fuel tube assembly.
   Fig 10: Sliding SST & Connector Together Towards Fuel Tube Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Observe these precautions when disconnecting the fuel tube connector (quick type).
   1. Remove the fuel pipe clamp.
      Fig 11: Removing Fuel Pipe Clamp

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Check if there is any dirt like mud on the pipe and around the connector before disconnecting them and clean the dirt away.
   3. Be sure to disconnect with hands.
   4. 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.
      Fig 12: Pinching Retainer Between Hands

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Inspect if there is any dirt or the likes on the seal surface of the disconnected pipe and clean it away.
   6. Prevent the disconnected pipe and connector from damaging and mixing foreign objects by covering them with a vinyl bag.
   Fig 13: Covering Disconnected Pipe With Vinyl Bag

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. 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 14: Checking Retainer For Any Damage Or Foreign Objects

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Match the axis of the connector with axis of the pipe, and push in the connector until 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.
      Fig 15: Pushing Connector Until Retainer Makes Sound

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. After having finished the connection, check if the pipe and the connector are securely connected by pulling them.
   6. Install the fuel pipe clamp.
      Fig 16: Installing Fuel Pipe Clamp

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Check if there is any fuel leakage.
7. Observe these precautions when handling nylon tube.
   1. Pay attention not to turn the connected part of the nylon tube and the quick connector with force when connecting them.
   2. Pay attention not to kink the nylon tube.
   3. Do not remove the nylon tube.
   4. Must not close the piping with the nylon tube by bending it.
8. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.
   1. Connect the TOYOTA hand-held tester to the DLC3.
      Fig 17: Connecting Hand-Held Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch ON and push TOYOTA hand-held tester main switch ON.
   3. Select the active test mode on the TOYOTA hand-held 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