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Fuel Injector: Inspection

  1. INSPECT FUEL INJECTOR ASSEMBLY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        FUEL INJECTOR ASSEMBLY

        Tester Connection Specified Condition
        1-2 11.6 to 12.4 Ω at 20°C (68°F)
        Fig 1: Measuring Resistance Between Terminals Using Ohmmeter
        G04962629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the result is not as specified, replace the fuel injector.

    2. Check the injection volume.
      NOTE:
      • Perform the test in a well-ventilated area away from naked for flames.
      • Handle the fuel tube connector carefully.
        Fig 2: Identifying Pressure Regulator & Fuel Tube Connector
        G04962630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the fuel tube connector into SST (hose), then connect the tube connector to the fuel pipe.

        SST 09268-31011 (95336-08070, 09268-41500) 

        CAUTION: Connect the fuel tube connector (quick type) after observing the precautions.
        2. Fig 3: Connecting Fuel Tube Connector
        G05109631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Remove the fuel pressure regulator (See REMOVAL  ).
      3. Install the O-ring onto the fuel inlet of the pressure regulator.
      4. Connect SST (hose) to the fuel inlet of the pressure regulator with another SST (union) and the 2 bolts.

        SST 09268-31011 (09268-41091, 95336-08070) 

        Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf) 

        Fig 4: Connecting Fuel Return Hose To Fuel Outlet Of Pressure Regulator
        G04962633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Connect the fuel return hose to the fuel outlet of the pressure regulator.
      6. Install a new O-ring onto the injector.
      7. Connect SST (adaptor and hose) to the injector and hold the injector and union with SST (clamp).

        SST 09268-31011 (95336-08070, 09268-41100), 09268-41140 

        Fig 5: Connecting SST To Injector
        G04962634Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      8. Set the injector in a graduated cylinder.
        CAUTION: Install a suitable vinyl tube onto the injector to prevent gasoline splashes.
      9. Connect the intelligent tester to the DLC3.
        Fig 6: Connecting Intelligent Tester To DLC3
        G05108946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      10. Turn the ignition switch ON.
      11. Turn the intelligent tester ON.
      12. Select the following menu items: DIAGNOSIS / ENHANCED OBD II /ACTIVE TEST /FUEL PUMP / SPD / ON.
      13. Install SST onto the fuel injector.
      14. Connect SST to the battery, then measure the injection volume for 15 seconds. Perform the inspection 2 or 3 times, then calculate the average.

        Standard: 

        INJECTION VOLUME SPECIFICATION

        Injection Volume Difference Between Each Fuel Injector
        76 to 91 cm3 (4.6 to 5.5 cu in.) per 15 seconds 15 cm3 (0.9 cu in.) or less
        Fig 7: Connecting SST To Battery
        G05109635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: Always do the switching at the battery side.

        If the result is not as specified, replace the fuel injector.

    3. Check for fuel leakage.
      1. When checking the injection volume, remove SST from the battery. Inspect the fuel leakage from the fuel injector.

        Standard: 

        1 drop or less every 12 minutes. 

        If the result is not as specified, replace the fuel injector.

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