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Fuel Injector: Inspection

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

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

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

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

        2. Fig 1: Identifying Fuel Injector Connector Terminals
        G05193230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the injector injection volume.
      CAUTION:

      Keep the injector away from sparks during this test.

      1. Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (the vehicle side).

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

        2. Fig 2: Connecting SST To Fuel Pipe
        G05008872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Install the O-ring to the fuel injector.
      3. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).

        SST 09268-31011 (09268-41110, 09268-41300, 90467-13001) 

        4. Fig 3: Connecting SST (Adapter And Hose) To Injector
        G04974898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Put the fuel 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 ).
      6. Install SST onto the fuel injector.

        SST 09842-30080 

      7. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
        Fig 4: Connecting SST To Battery
        G04829051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard volume 

        INJECTION VOLUME

        Injection Volume Difference between each fuel injector
        60 to 73 cm3 (3.6 to 4.5 cu in.) per 15 seconds 13 cm3 (0.8 cu In.) or less
        NOTE:

        Always do the switching at the battery side.

        HINT:

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

    3. Inspect the fuel leakage.
      1. Disconnect the SST (wire) tester probes from the battery and check the fuel leakage from the injector.

        Standard: 

        1 drop or less every 12 minutes 

        HINT:

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

        2. Fig 5: Inspecting Fuel Leakage
        G05193234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Turn the ignition switch off.
      3. Disconnect the cable from the negative (-) battery terminal.
      4. Remove the SST.
      5. Disconnect the intelligent tester from the DLC3.
      6. Reconnect the fuel main tube to the fuel pipe.
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