2007 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Fuel Injector: Inspection

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

        Resistance: 11.6 to 12.4 Ω at 20°C (68°F) 

        Fig 1: Identifying Injectors O-Rings
        G04975012Courtesy 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.
        Fig 2: Installing Fuel Tube Connector To SST
        G04975013Courtesy 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: Connecting 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: Checking Fuel Leakage From Injector
        G04975016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.

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