2004 Toyota Tundra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

SFI System (5VZ-FE): Injector: Inspection

  1. INSPECT INJECTOR RESISTANCE 

    Using an ohmmeter, measure the resistance between the terminals.

    Resistance: 13.4 - 14.2 Ω at 20°C (68°F) 

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

    Fig 1: Measuring Resistance Between Terminals
    G04207961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT INJECTOR INJECTION 
    CAUTION: Keep injector clear of sparks during the test.
    1. Disconnect the fuel inlet pipe from the fuel tube.
    2. Connect SST (attachment and hose) to the fuel tube.

      SST 09268-41047 (09268-52011)

    3. Connect the fuel return hose, SST (union) and SST (hose) to the fuel pressure regulator.

      SST 09268-41047 (09268-41091)

      Fig 2: Disconnecting Fuel Inlet Pipe From Fuel Tube
      G04207962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the O-ring to the injector.
    5. Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp).

      SST 09268-41047

    6. Put the injector into the graduated cylinder.

      HINT:

      Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.

      Fig 3: Installing Vinyl Tube Onto Injector
      G04207963Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Connect a hand-held tester to the DLC3.
    8. Connect the battery negative (-) cable to the battery.
    9. Turn the ignition switch ON, and push the hand-held tester main switch ON.
      NOTE: Do not start the engine.
    10. Select the ACTIVE TEST mode on the hand-held tester.
    11. Please refer to the hand-held tester operator's manual for further details.
      Fig 4: Connecting Hand-Held Tester To DLC3
      G04207964Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.

      SST 09842-30070

      Volume: 56 - 69 cm 3  (3.4 - 4.3 cu in.) per 15 sec. 

      Difference between each injector: 13 cm 3  (0.8 cu in.) or less 

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

    Fig 5: Connecting SST (Wire) To Injector And Battery
    G04207965Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.

      SST 09842-30070

      Fuel drop: 1 drop or less per 12 min. 

    2. Turn the ignition switch OFF.
    3. Disconnect the negative (-) terminal cable from the battery.
    4. Remove the SST.

      SST 09268-41047

    5. Disconnect the hand-held tester from the DLC3.
    Fig 6: Checking Fuel Leakage From Injector
    G04207966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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