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Fuel Injector: Inspection

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

        Standard resistance: 

        13.4 to 14.2 Ω at 20°C (68°F) 

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

        Fig 1: Identifying Fuel Injector Connector Terminals
        G05200849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the injection volume.
      CAUTION: This test involves high-pressure fuel and electricity. Take all precautions regarding safe handling of both the fuel and the electricity. Perform this test in a safe area, and avoid any sparks or flames. Do not smoke.
      1. Connect the fuel tube connector to SST (hose), then connect the tube connector to the fuel pipe (the vehicle side).

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

      2. Install the O-ring to the fuel injector.
        Fig 2: Connecting Fuel Tube Connector To SST (Hose)
        G05200850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Connect SST (adaptor and hose) to the injector, and hold the injector and adapter with SST (clamp).

        SST 09268-31012 (90467-13001, 95336-08070, 09268-41110, 09268-41300) 

        Fig 3: Connecting SST (Adaptor And Hose) To Injector
        G05200851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Put the injector into a graduated cylinder.
        CAUTION: Install a strong rubber tube onto the injector to prevent gasoline from splashing.
      5. Operate the fuel pump (turn the ignition switch to the ON position).
      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.
        Fig 4: Connecting SST (Wire) To Injector
        G05200852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        SST 09842-30070 

        Injection volume 

        INJECTION VOLUME SPECIFICATION

        Injection volume Injection volume difference between each injector
        60 to 73 cm3 (3.7 to 4.5 cu in.) per 15 seconds 13 cm3 (0.8 cu in.) or less

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

    3. Inspect the leakage.
      1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check the fuel leakage from the injector. Fuel drop: 1 drop or less in 12 minutes
        Fig 5: Inspecting Leakage
        G05239171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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