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SFI System: Injector: Inspection

  1. INSPECT INJECTOR INJECTION 
    CAUTION: Keep injector clean of sparks during the test.
    Fig 1: Inspecting Injector Injection
    G03076881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the fuel inlet hose (fuel tube connector) from the fuel filter.
      CAUTION:
      • Perform disconnecting operations of the fuel tube connector (quick type) after reading the precautions (See SFI SYSTEM  ).
      • Prevent the retained pressure in the fuel pipe line from splashing inside the engine compartment.
    2. Use a new fuel main hose and take out the fuel tube connector from its hose.

      Part No. 23271-50150

      Fig 2: Disconnecting Fuel Inlet Hose (Fuel Tube Connector) From Fuel Filter
      G03076882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Identifying Fuel Tube Connector
      G03076883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect SST (hose) and fuel tube connector to the fuel filter outlet.

      SST 09268-41047

      CAUTION: Perform connecting operations of the fuel tube connector (quick type) after reading the precautions (See SFI SYSTEM  ).

      HINT:

      Use the vehicle's fuel filter.

      Fig 4: Connecting SST (Hose) And Fuel Tube Connector To Fuel Filter Outlet
      G03076884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the pressure regulator from the delivery pipe.
    5. Install the O-ring to the fuel inlet of the pressure regulator.
    6. Connect SST (hose) to the fuel inlet of the pressure regulator with SST (union) and the 2 bolts.

      SST 09268-41047 (09268-41091)

      Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf) 

    7. Connect the fuel return hose to the fuel outlet of the pressure regulator.
      Fig 5: Connecting Fuel Return Hose To Fuel Outlet Of Pressure Regulator
      G03076885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Install the O-ring to the injector.
    9. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).

      SST 09268-41047 (09268-41110, 09268-41300)

    10. Put the injector into the graduated cylinder.
      CAUTION: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.
      Fig 6: Connecting SST (Adaptor And Hose) To Injector
      G03076886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Connect the TOYOTA hand-held tester or OBD II scan tool to the DLC3.
    12. Connect the battery negative (-) cable to the battery.
    13. Turn the ignition switch ON, and press the TOYOTA hand-held tester or OBD II scan tool main switch ON.
      NOTE: Do not start the engine.
    14. Select ACTIVE TEST mode on the TOYOTA hand-held tester or OBD II scan tool.
    15. Please refer to the TOYOTA hand-held tester or OBD II scan tool operator's manual for further details.
    16. If you have no TOYOTA hand-held tester or OBD II scan tool, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See FUEL PUMP  ).
      Fig 7: Connecting Toyota Hand-Held Tester
      G03076887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    17. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.

      SST 09842-30070

      Volume: 56 - 69 cm 3  (3.4 - 4.2 cu in.) per 15 seconds Difference between each injector: 

      13 cm 3  (0.8 cu in.) or less 

      If the injection volume is not as specified, replace the injector.

      Fig 8: Connecting SST (Wire) To Injector
      G03076888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT LEAKAGE 
    1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check the fuel leakage from the injector.

      SST 09842-30070

      Fuel drop: 1 drop or less per 12 minutes 

      Fig 9: Checking Fuel Leakage From Injector
      G03076889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch OFF.
    3. Disconnect the negative (-) terminal cable from the battery.
    4. Remove SST and fuel tube connector.

      SST 09268-41047, 09842-30070

    5. Disconnect the TOYOTA hand-held tester or OBD II scan tool from the DLC3.
    6. Reconnect the fuel inlet pipe (fuel tube connector) to the fuel filter.
      CAUTION: Perform connecting operations of the fuel tube connector (quick type) after observing the precautions (See SFI SYSTEM  ).
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