LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2006 >> RX 330 FWD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel (3MZ-FE) >> Fuel Injector >> Inspection

Fuel Injector: Inspection

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

        Resistance: 

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

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

    2. Inspect injector operation
      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 flame.
      • Do not smoke.
      1. Pull out the connector from a new fuel tube.

        HINT:

        Part No. 23801-20180

        Fig 1: Identifying Fuel Tube Connector
        G04088024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect SST and the fuel tube connector to the fuel pipe.

        SST 09268-41047 (95336-08070) 

        CAUTION: After taking the precaution, connect the fuel tube connector (quick type).
        Fig 2: Connecting SST And Fuel Tube Connector To Fuel Pipe
        G04088025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Install the grommet and O-ring to the injector.
      4. Connect SST (union and hose) to the injector, and hold the injector and the union with SST (clamp)

        SST 09268-41047 (09268-41110, 09268-41300, 95336-08070) 

      5. Put the injector into a graduated cylinder.
        Fig 3: Connecting SST (Union And Hose) To Injector
        G04088026Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

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

      6. Operate the fuel pump (See FUEL INJECTOR  ).

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

      7. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.

        SST 09842-30070 

        Fig 4: Connecting SST (Wire) To Injector And Battery
        G04088027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Injection volume 

        INJECTION VOLUME SPECIFICATIONS

        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
        NOTE: Always do the switching at the battery side.

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

    3. Inspect leakage
      1. In the condition above, disconnect the test 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
    G04088028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals