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Fuel Injector: Inspection

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

        Standard resistance 

        RESISTANCE REFERENCE CHART

        Tester Connection Condition Specified Condition
        1-2 always 11.6 to 12.4 Ω at 20°C (68°F)
        Fig 1: Measuring Resistance Between Injector Terminals
        G05138187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    2. Inspect the injection volume.
      CAUTION: This test involves high-pressure fuel and electricity. Take every precaution regarding the safe handling of both fuel and electricity. Perform this test in a safe area, and avoid any sparks or flames. Do not smoke.
      1. Install the fuel tube connector to SST (hose), then connect the tube connector to the fuel pipe (vehicle side).

        SST 09268-31011 (09268-41500, 90467-13001, 95336-08070) 

      2. Install the O-ring to the fuel injector sub-assembly.
        Fig 2: Identifying Fuel Tube, Clip And SST
        G05138188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).

        SST 09268-31011 (90467-13001, 95336-08070), 09268-41140, 09268-41400 

      4. Put the injector into the graduated cylinder.
        CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.
      5. Operate the fuel pump (See ON-VEHICLE INSPECTION  ).
        Fig 3: Identifying SST (Adaptor And Hose) To Injector
        G04975014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Connect SST (wire) to the 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 

        Volume: 84 to 100 cm 3  (5.1 to 6.0 cu in.) in 15 seconds 

        Difference between each injector: 16 cm 3  (0.98 cu in.) or less 

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

        Fig 4: Connecting SST To Battery
        G04829051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check for leakage. 
      1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check for fuel leakage from the injector.

        Fuel drop: 1 drop or less in 16 minutes 

        Fig 5: Identifying Fuel Leakage From Injector
        G04975016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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