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Fuel Injector: Inspection

  1. INSPECT FUEL INJECTOR ASSEMBLY 
    1. Check the resistance.
      1. Measure the resistance according to the value(s) in the table below.
        Fig 1: Measuring Resistance Value
        G05399436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        RESISTANCE REFERENCE

        Tester connection Condition Specified condition
        1-2 20°C (68°F) 11.6 to 12.4 Ω

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

    2. Check the operation.
      CAUTION: Perform the inspection in a well-ventilated area. Do not perform the inspection near any flames.
      1. Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (vehicle side).
        Fig 2: Identifying Connection Of Fuel Pipe (Vehicle Side)
        G04829049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        SST 09268-41048 (90467-13001, 95336-08070, 09268-41500) 

      2. Install the O-ring onto the fuel injector.
      3. Connect SST (adapter and hose) to the fuel injector, and hold the fuel injector and union with SST (clamp).

        SST 09268-41048 (09268-41110, 90467-13001, 95336-08070, 09268-41310) 

        Fig 3: Identifying Connection Of Fuel Injector
        G05399438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Set the fuel injector in a graduated cylinder.
        CAUTION: Install a suitable vinyl tube onto the injector assembly to prevent gasoline splashes.
      5. Operate the fuel pump (See ON-VEHICLE INSPECTION  ).
      6. Connect SST (wire) to the fuel injector 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: 60 to 73 cm 3  (3.7 to 4.5 cu in.) every 15 seconds 

        Difference between each injector: 13 cm 3  (0.8 cu in.) or less 

        Fig 4: Identifying Connection Of SST (Wire)
        G04829051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: Always do the switching at the battery side.

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

    3. Check the leakage.
      1. In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the fuel injector.

        Fuel drop: 1 drop or less every 12 minutes 

        Fig 5: Identifying Fuel Leakage Of Fuel Injector
        G04829052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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