2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Fuel Injector: Inspection

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

      Standard resistance: 

      13.4 to 14.2 Ω at 20°C (68°F) 

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

      Fig 1: Identifying Fuel Injector Assembly Terminals
      G05289164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the injector injection.
      CAUTION: Keep the injector away from sparks during the test.
      1. Disconnect the fuel inlet hose (rear fuel pipe) from the fuel main tube.
      2. Install SST to the fuel main tube.

        SST 09268-31011 (90467-13001, 95336-08070, 09268-41110, 09268-41300, 09268-52011) 

      3. Install the O-ring to the fuel injector.
        Fig 2: Identifying O-Ring To Fuel Injector
        G05289165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).

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

      5. Put the injector into the graduated cylinder.
        CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.
      6. Operate the fuel pump.
        Fig 3: Identifying SST (Adapter And Hose) To Injector
        G05289166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      7. 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.

        Standard injection volume: 

        60 to 73 cm 3  (3.7 to 4.5 cu in.) per 15 seconds 

        Difference between each injector: 

        13 cm 3  (0.8 cu in.) or less 

        Fig 4: Connecting SST To Battery
        G05289167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the fuel leakage.
      1. In the condition above, disconnect the SST (wire) tester probes from the battery and check the fuel leakage from the injector.

        Standard fuel drop: 

        1 drop or less per 12 minutes 

        Fig 5: Identifying Fuel Leakage
        G05289168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.