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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: 2WD 

        RESISTANCE SPECIFIED CONDITIONS (2WD)

        Tester Connection Specified Condition
        1 - 2 11.6 to 12.4 Ω at 20°C (68°F)
        Fig 1: Identifying Fuel Injector Connector Terminals
        G04461819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        4WD 

        RESISTANCE SPECIFIED CONDITIONS (4WD)

        Tester Connection Specified Condition
        1 - 2 13.4 to 14.2 Ω at 20°C (68°F)

        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 and watch out for flames.
      • Handle the fuel tube connector carefully.
      1. Prepare a new fuel tube.

        HINT:

        ENGINE AND PART NO. REFERENCE

        Engine Type Part No.
        2WD 23901 - 0D040
        4WD 23901 - 0D010
        Fig 2: Cutting Protector Of Fuel Tube Protector
        G04461820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Using a cutter knife, cut the protector of the fuel tube protector as illustrated. Tear the protector by hand, then remove the fuel tube connector.
        NOTE: If the protector is cut too deeply using the cutter, the O-ring of the fuel tube connector will be damaged.
      3. Install the fuel tube connector into SST, then connect the fuel tube connect to the fuel pipe (the vehicle side).

        SST 09268-31011 (95336-08070) 

        CAUTION: Connect the fuel tube connector (quick type) in accordance with to the precautions.
        Fig 3: Installing Fuel Tube Connector Into SST
        G04461821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Install a new O-ring onto the fuel injector.
      5. Install SST and the vinyl tube onto the fuel injector.

        SST 09268-31011 (09268-41110, 09268-41300, 95336-08070) 

        Fig 4: Installing SST And Vinyl Tube Onto Fuel Injector
        G04461822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Set the fuel injector in a graduated cylinder.

        HINT:

        Install a suitable vinyl tube onto the injector to prevent gasoline splashes.

      7. Actuate the fuel pump.
      8. Install SST onto the fuel injector.

        SST 09842-30080 

      9. Connect SST to the battery, then measure the injection volume for 15 seconds. Perform the inspection 2 or 3 times, then calculate the average.
        Fig 5: Installing SST Onto Fuel Injector
        G04461823Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard volume: 1ZZ-FE 

        INJECTION VOLUME REFERENCE (1ZZ-FE)

        Injection Volume Difference between each fuel injector
        60 to 73 cm3 (3.6 to 4.5 cu in.) per 15 seconds 13 cm3 (0.8 cu in.) or less
        NOTE: Always do the switching at the battery side.

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

    3. Inspect the leakage.
      1. When inspecting 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.

        Fig 6: Inspecting Fuel Leakage From Fuel Injector
        G04461824Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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