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Fuel System: Inspection

  1. INSPECT FUEL INJECTOR ASSY 
    1. Inspect the 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. Check the operation.
      CAUTION:
      • Perform the test in a well-ventilated area and watch out for flames.
      • Carefully handle the fuel tube connector.
      1. Pull out the connector from a new fuel tube.

        HINT:

        Part No. 23901-21060

        Fig 1: Pulling Out Connector
        G03097373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect SST and the fuel tube connector to the fuel pipe.

        SST 09268-41047 (95336-08070)

        Fig 2: Connecting SST And Fuel Tube Connector To Fuel Pipe
        G03097374Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        CAUTION: After taking the precaution, connect the fuel tube connected (quick type).
      3. Install the grommet and O-ring onto the injector.
        Fig 3: Installing Grommet And O-Ring Onto Injector
        G03097375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp).

        SST 09268-41047 (95336-08070, 09268-41110, 09268-41300), 09842-30080

      5. Put the injector into a graduated cylinder.

        HINT:

        Install a suitable vinyl tube onto the injector to prevent gasoline splashes.

      6. Operate the fuel pump. (See ON-VEHICLE INSPECTION )
      7. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
      8. SST 09842-30080

      Fig 4: Connecting SST (Wire) To Injector And Battery
      G03097376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Injection volume: 

      INJECTION VOLUME SPECIFICATION

      Injection volume Difference between each injector
      47 to 58 cm3 (2.9 to 3.5 cu in.) per 15 seconds 11 cm3 (0.6 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 the 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
      G03097377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FUEL PUMP ASSY 
    1. Inspect the fuel pump resistance.
      1. Using an ohmmeter, measure the resistance between terminals.

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

      Fig 6: Measuring Resistance Of Fuel Pump Terminals
      G03097378Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the fuel pump operation.
      1. Apply battery voltage between terminals. Check that the pump operates.
      NOTE:
      • These tests must be done quickly (within 10 seconds) to prevent coil burnout.
      • Keep fuel pump as far away from the battery as possible.
      • Away do the switching at the battery side.

      If the operation is not as specified, replace the fuel pump.