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Fuel System (2AZ-FE): Inspection

  1. INSPECT FUEL INJECTOR ASSY 
    1. Check the injector resistance.
      1. Measure the resistance between the terminals.

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

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

    2. Check the injector injection.
      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. Purchase a new fuel tube and disconnect the fuel tube connector from its pipe.

        Fuel tube: Part No. 23801-20180

        Fig 1: Identifying Fuel Tube Connector
        G02596802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect SST and fuel tube connector to the fuel pipe.

        SST 09268-41047

        CAUTION: Always read the precautions (see FUEL SYSTEM (2AZ-FE) ) before connecting the fuel tube connector (quick type).
        Fig 2: Connecting SST And Fuel Tube Connector To Fuel Pipe
        G02596803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Install the O-ring to the injector.
      4. Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp).

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

      5. Put the injector into a graduated cylinder.

        HINT:

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

      6. Operate the fuel pump (see ON-VEHICLE INSPECTION ).
        Fig 3: Installing Suitable Vinyl Tube Onto Injector
        G02596804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      7. Connect SST to the connector of injector.
      8. Connect SST (wire) to the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 time.

      SST 09842-30080

      Standard: 

      Fig 4: Connecting SST To Connector Of Injector
      G02596805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      ITEM SPECIFIED CONDITION

      Item Specified Condition
      Injection Volume 76 to 92 cm3 (4.6 to 5.6 cu in.) per 15 seconds
      Difference Between Each Injector 16 cm3 (1.0 cu in.) or less
      NOTE: Always turn on and off the voltage on the battery side, not the fuel pump side.

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

    3. Check fuel leakage.
      1. In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector.
        Fig 5: Checking Fuel Leakage
        G02596806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Fuel drop: 1 drop or less per 12 minutes 

  2. INSPECT FUEL PUMP ASSY 
    1. Check fuel pump resistance.
      1. Measure the resistance between the terminals.

      Resistance: 0.2 to 3.0 Ω at 20°C (68°F) 

    2. Check fuel pump operation.
      1. Apply battery voltage to both terminals. Check that the pump operates.
      Fig 6: Identifying Fuel Pump Assy Connector Terminals
      G02596807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • These tests must be done within 10 seconds to prevent the coil from burning out.
    • Keep the fuel pump as far away from the battery as possible.
    • Always turn on and off the voltage on the battery side, not the fuel pump side.
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