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Fuel System: Inspection

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

      Standard: 

      FUEL INJECTOR ASSY RESISTANCE STANDARD (1 OF 2)

      Tester Connection Specified Condition
      1 - 2 13.45 to 14.15 Ω at 21 °C (68°F)

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

      Fig 1: Measuring Resistance Between Terminals
      G02920069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the injection volume.
      NOTE:
      • Perform the test in a well-ventilated area and watch out for flames.
      • Carefully handle the fuel tube connector.
      1. Prepare a new fuel tube.

        HINT: 

        Part No. 23901-21080

      2. Using a cutter knife, cut off the protector of the fuel tube as illustrated. Tear off the protector by hand, then remove the fuel tube connector.
        Fig 2: Cutting Protector Of Fuel Tube Connector
        G02920070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: If the protector is cut too deeply using a cutter, the O-ring of the fuel tube connector will be damaged.
      3. Install SST to the fuel tube connector, then connect the fuel tube connector to the fuel pipe (the vehicle side).
        1. SST 09268-41047 (95336-08070)
        Fig 3: Installing SST To Fuel Tube Connector And Connector To Fuel Pipe
        G02920071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Install a new O-ring to the fuel injector.
      5. Install SST and the vinyl tube to the fuel injector.
        1. SST 09268-41047 (09268-41110, 09268-41300)
        Fig 4: Installing O-Ring, SST And Vinyl Tube To Fuel Injector
        G02920072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Set the fuel injector to a graduated cylinder.
      7. Actuate the fuel pump (see ON-VEHICLE INSPECTION  ).
      8. Install SST to the fuel injector.
        1. SST 09842-30080
      9. Connect SST to the battery, then measure the injection volume for 15 seconds. Perform the inspection 2 or 3 times, then calculate the average.

      Standard: 

      FUEL INJECTOR ASSY RESISTANCE STANDARD (2 OF 2)

      Injection Volume Difference between each fuel injector
      46 to cm3 (2.1 to 2.8 cu in.) 10 cm3 (0.6 cu in.) or less
      Fig 5: Setting Fuel Injector In Graduated Cylinder
      G02920073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: Always do the switching at the battery side.

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

    3. Inspect the leakage.
      1. In the condition that the injection volume was inspected, remove SST from the battery. Inspect the fuel leakage from the fuel injector.

      Standard: 1 drop or less per 12 minutes 

      If the fuel leakage is not as specified, replace the fuel injector.

      Fig 6: Inspecting Leakage From Fuel Injector
      G02920074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FUEL TANK ASSY (FUEL PUMP) 
    1. Inspect the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      FUEL TANK ASSY (FUEL PUMP) STANDARD

      Tester Connection Specified Condition
      3 - 7 0.2 to 3.0 Ω at 20°C (68°F)

      If the resistance is not as specified, replace the fuel tank.

      Fig 7: Measuring Resistance Between Terminals
      G02920075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the operation.
      1. Check that the motor operates when battery voltage is applied across the terminals.
      NOTE:
      • Perform the check quickly (shorter than 10 seconds).
      • Keep the battery as far away the fuel tank as possible.
      • Always do the switching at the battery side.

      If the motor does not operate, replace the fuel tank.

    Fig 8: Checking Motor Operation
    G02920076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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