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Fuel Injector: Inspection

  1. INSPECT FUEL INJECTOR ASSEMBLY 
    1. Measure the resistance between the terminals.

      Standard resistance: 13.45 to 14.15 Ω at 21°C (70°F) 

      If the resistance is not as specified, replace the fuel injector assembly.

      Fig 1: Inspecting Fuel Injector Assembly
      G04472847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the injection volume.
      CAUTION: Perform the test in a well-ventilated area away from flames.
      1. Connect SST (fuel tube connector) to SST (hose) then connect them to the fuel tube (the vehicle side).

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

        Fig 2: Installing SST To Fuel Tube Connector, & Connecting Fuel Tube Connector To Fuel Pipe
        G04472849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Install a new O-ring to the fuel injector.

        SST 09268-31012 (09268-41110, 09268-41300, 90467-13001) 

      3. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).
      4. Install SST and the vinyl tube to the fuel injector.
        Fig 3: Installing SST And Vinyl Tube To Fuel Injector
        G04472850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Set the fuel injector to a graduated cylinder.
      6. Operate the fuel pump (see ON-VEHICLE INSPECTION ).
      7. Install SST to the fuel injector.

        SST 09842-30080 

        Fig 4: Installing SST To Fuel Injector
        G04472851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      8. 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 

        STANDARD INJECTION VOLUME

        Injection Volume Difference between each fuel injector
        36 to 46 cm3 (2.1 to 2.8 cu in.) 10 cm3 (0.6 cu in.) or less
        NOTE: Always turn the voltage on and off on the battery side, not the fuel injector side.

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

    3. Inspect the fuel leakage.
      1. In the condition that the injection volume was inspected, remove SST from the battery. Inspect the fuel leakage from the fuel injector.

        Standard fuel drop: 1 drop or less per 12 minutes 

        If the fuel leakage is not as specified, replace the fuel injector assembly.

        Fig 5: Inspecting Fuel Leakage From Fuel Injector
        G04472852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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