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Fuel System (1NZ-FXE): Inspection

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

        Standard: 

        TESTER CONNECTION CONDITION SPECIFICATION

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

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

      Fig 1: Inspecting Fuel Injector Assy
      G02616386Courtesy 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.
        NOTE: If the protector is cut too deeply using a cutter, the O-ring of the fuel tube connector will be damaged. 
        Fig 2: Cutting Off Protector Of Fuel Tube
        G02616387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Install SST to the fuel tube connector, then connect the fuel tube connector to the fuel pipe (the vehicle side).

        SST 09268-41047 (95336-08070)

        Fig 3: Installing SST To Fuel Tube Connector
        G02616388Courtesy 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.

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

        Fig 4: Installing New O-Ring To Fuel Injector
        G02616389Courtesy 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.

        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: 

        STANDARD SPECIFICATION

        Injection Volume Difference between each fuel injector
        36 to 46 cm3 (2.1 to 2.8 cu in.) 10 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 fuel injector.

      Fig 5: Setting Fuel Injector To A Graduated Cylinder
      G02616390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. 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
      G02616391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT FUEL TANK ASSY (FUEL PUMP) 
    1. Inspect the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        TESTER CONNECTION CONDITION SPECIFICATION

        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: Inspecting Fuel Tank Assy (Fuel Pump)
      G02616392Courtesy 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 Operates When Battery Voltage Applied Across Terminals
      G02616393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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