2004 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Throttle Body ASSY (3MZ-FE): Replacement

  1. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL) 
  2. REMOVE RADIATOR LOWER AIR DEFLECTOR 
  3. DRAIN ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  4. REMOVE FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS) 
    1. Remove the 4 nuts, then remove the front suspension upper brace center and 4 spacers.
    2. Temporarily tighten the 4 nuts.
      Fig 1: Removing Front Suspension Upper Brace Center (W/O Tems)
      G00919766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE V-BANK COVER SUB-ASSY 
    1. Using a socket hexagon wrench 5, remove the 3 nuts.
    2. Unfasten the 2 retainers, then remove the V-bank cover.
      Fig 2: Removing V-Bank Cover Sub-Assy
      G00919767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE AIR CLEANER CAP SUB-ASSY 
    1. Disconnect the mass air flow meter connector.
    2. Disconnect the 4 vacuum hoses.
    3. Disconnect the ventilation hose No. 2.
    4. Disconnect the fuel vapor feed hose from the 2 hose clamps.
    5. Loosen the 2 air cleaner cap bolts.
    6. Loosen the air cleaner hose clamp bolt, then remove the air cleaner cap.
    7. Remove the air cleaner filter element.
      Fig 3: Removing Air Cleaner Cap Sub-Assy
      G00919768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE THROTTLE BODY ASSY 
    1. Disconnect the throttle motor connector.
    2. Disconnect the water by-pass hose No. 2.
    3. Disconnect the water by-pass hose No. 3.
      Fig 4: Removing Throttle Body Assy
      G00919769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 4 bolts, then remove the throttle body.
    5. Remove the gasket from the intake air connector.
      Fig 5: Removing Throttle Body
      G00919770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSTALL THROTTLE BODY ASSY 
    1. Install a new gasket to the intake air connector.
    2. Instal the throttle body with the 4 bolts.

      Torque: 11 N.m (112 kgf.cm, 8 ft.lbf) 

    3. Connect the water by-pass hose No. 3.
    4. Connect the water by-pass hose No. 2.
    5. Connect the throttle motor connector.
  9. INSTALL AIR CLEANER CAP SUB-ASSY 

    Torque: 5.0 N.m (51 kgf.cm, 44 in.lbf) 

  10. CHECK CONNECTION OF VACUUM HOSE 
  11. CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL) 

    Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf) 

  12. ADD ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  13. CHECK FOR ENGINE COOLANT LEAKS (See  ON-VEHICLE INSPECTION  ) 
  14. INSTALL V-BANK COVER SUB-ASSY 
    1. Fit the 2 retainers, then install the V-bank cover.
    2. Using a socket hexagon wrench 5, tighten the 3 nuts.

      Torque: 7.9 N.m (81 kgf.cm, 70 in.lbf) 

  15. INSTALL FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS) 

    Torque: 80 N.m (816 kgf.cm, 59 ft.lbf) 

  16. INSTALL RADIATOR LOWER AIR DEFLECTOR 
  17. SYSTEM INITIALIZATION (See  PRECAUTION  ) 
Factory Service Tools

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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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