Section 714 (Engine Fuel System (3MZ-FE)): Precaution

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

PRECAUTION
1. Before working on the fuel system, disconnect the negative (-) terminal cable from the battery.
2. Do not smoke or be near an open flame when working on the fuel system.
3. Keen gasoline away from rubber or leather Darts.
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 shop rag over fittings as you separate them to reduce risk of fuel spray on yourself or in the engine compartment.
1. Remove the C/OPN relay from the engine room J/B.
  
  Fig 1: Removing C/OPN Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Start the engine. After the engine has stopped, turn the ignition switch OFF.
  HINT:
  
  In some cases, that DTC P0171 (system to lean) is output.
3. Check that the engine does not start.
4. Remove the fuel tank cap, and allow the air out of the fuel tank.
5. Disconnect the negative (-) terminal cable from the battery.
6. Reinstall the C/OPN relay.
FUEL SYSTEM
1. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out. Follow these procedures.
  1. Try to prevent gasoline from spilling out.
  2. Disconnect the fuel pump tube (see REPLACEMENT ).
  3. Drain the fuel remaining inside the fuel pump tube.
  4. To protect the disconnected fuel pump tube from damage and contamination, cover it with a vinyl bag.
    
    Fig 2: Covering Fuel Pump With Vinyl Bag
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Put a container under the connection.
2. Observe these precautions when removing and installing the fuel injectors.
  1. Never reuse O-rings.
  2. When installing a new O-ring on the injector, be careful not to damage it.
    
    Fig 3: Installing O-Ring Carefully
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Coat new O-rings with grease or gasoline before installing. Never use engine oil, gear oil or brake oil.
3. Install the injector to the delivery pipe and cylinder head, as shown in Fig 4 . Before installing the injector, be sure to apply grease or gasoline on the place where the delivery pipe contacts the O-ring of the injector.
  
  Fig 4: Installing Injector To Delivery Pipe & Cylinder Head
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Observe these precautions when disconnecting the fuel tube connectors.
  1. Remove the fuel pipe clamp No. 1 from the tube connector.
    
    Fig 5: Removing Fuel Pipe Clamp No. 1 From Tube Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check for dirt or mud on the pipe and around the connector before disconnection. Clean if necessary.
  3. Disconnect the connector from the hose while pinching part A with your fingers, as shown in Fig 6 .
    
    Fig 6: Disconnecting Connector From Hose Pinching Part A
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. If the connector and the pipe are stuck, pinch the fuel pipe, push and pull the connector to disconnect the pipe it and pull it out. Do not use any tools.
    
    Fig 7: Pushing & Pulling Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. If dirt or any other substance is found on the sealing surface that might interfere with the seal, clean the area thoroughly before assembly.
  6. To protect the disconnected pipe and connector from damage and contamination, cover it with a vinyl bag.
  Fig 8: Covering Disconnected Pipe & Connector with Vinyl Bag
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Observe these precautions when connecting the fuel tube connector.
  1. Check that there is no damage or contamination in the connected 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 little amount of fresh engine oil on the tip of the pipe.
    
    Fig 9: Pushing Pipe Into Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. After having finished the connection, make sure the pipe and the connector are securely connected by trying to pull them apart.
    
    Fig 10: Making Sure Pipe & Connector Are Connected Securely
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Install the fuel pipe clamp to the connector.
  5. Check if there is any fuel leakage.
CHECK FOR FUEL LEAKS
1. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system (see ON-VEHICLE INSPECTION ).