Fuel Injector Inspection

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fe Fuel. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSPECT INJECTOR RESISTANCE

  2. INSPECT INJECTION VOLUME AND FOR LEAKAGE

Fuel Injector -- Inspection



1. INSPECT INJECTOR RESISTANCE


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Measure the resistance between the injector terminals.

    Standard resistance:
    11.6 to 12.4 Ω at 20°C (68°F)
    If the result is not as specified, replace the injector.


2. INSPECT INJECTION VOLUME AND FOR LEAKAGE
CAUTION:
This test involves high-pressure fuel and electricity. Take every precaution 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.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Fuel.Fuel System.Fuel Injector Inspection

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

    SST
    09268-41048(90467-13001,09268-41500,95336-08070)


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Fuel.Fuel System.Fuel Injector Inspection

  1. Install the O-ring to the fuel injector.

  1. Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).

    SST
    09268-41048(90467-13001,95336-08070,09268-41130)
    09268-41400

  1. Put the injector into the graduated cylinder.

    CAUTION:
    Install a suitable vinyl tube onto the injector to contain gasoline spray.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Fuel.Fuel System.Fuel Injector Inspection

  1. Operate the fuel pump.

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

      NOTICE:
      Do not start the engine.

    3. Push the intelligent tester main switch ON.

    4. Select the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump /Speed.



    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Fuel.Fuel System.Fuel Injector Inspection

  1. 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
    Injection volume:
    71 to 86 cm3 (4.3 to 5.2 cu.in.) in 15 seconds
    Difference between each injector:
    15 cm3 (0.9 cu.in.) or less
    If injection volume is not as specified, replace the injector.


    Lexus Gs430, Gs300. Uzs190 Grs190

  1. Check for leakage.

    1. When operating the fuel pump, disconnect the SST (wire) tester probes from the battery and check the fuel leakage from the injector.

      Fuel leakage:
      1 drop or less in 27 minutes