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Fuel Injector: Inspection

  1. INSPECT FUEL INJECTOR ASSEMBLY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      1-2 20°C (68°F) 11.6 to 12.4 Ω
      Fig 1: Inspecting Fuel Injector Assembly
      G06009870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    2. Check the operation.
      CAUTION: Perform the inspection in a well-ventilated area. Do not perform the inspection near a naked flame.
      1. Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (vehicle side).

        2. SST 09268>31012 (90467-13001, 95336-08070, 09268-41500) 

      2. Install the O-ring onto the fuel injector assembly.
        Fig 2: Identifying Fuel Tube Connector To SST
        G06009871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Connect SST (adapter and hose) to the injector assembly, and hold the injector assembly and union with SST (clamp).

        4. SST 09268-31012 (90467-13001, 95336-08070, 09268-41400, 09268-41110) 

        Fig 3: Connecting SST (Adapter And Hose) To Injector Assembly
        G06009872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Set the injector assembly in a graduated cylinder.
        CAUTION: Install a suitable vinyl tube onto the injector assembly to prevent gasoline from spraying.
      5. Operate the fuel pump.
      6. Connect SST (wire) to the injector assembly and the battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.

        SST 09842-30080 

        Injection Volume 

        INJECTION VOLUME REFERENCE

        Tester Connection Condition Specified Condition
        Positive terminal - Ground terminal Per 15 seconds 60 to 73 cm3 (3.7 to 4.5 cu in.)
        Fig 4: Measuring Injection Volume With Graduated Cylinder
        G06009873Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Difference between each injector: 

        13 cm 3  (0.8 cu in.) or less 

        NOTE: Always do the switching at the battery side.

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

    3. Check for leaks.
      1. Disconnect the test probes of SST (wire) from the battery and check the fuel leaks from the injector.

        Fuel drop: 

        1 drop or less every 12 minutes 

        Fig 5: Checking Fuel Leaks From Injector
        G04975016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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