2006 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Throttle Body ASSY: Replacement

  1. DRAIN ENGINE COOLANT (See  ENGINE COOLANT  ) 
  2. REMOVE V-BANK COVER 
    1. Remove the 2 nuts and V-bank cover.
  3. REMOVE AIR CLEANER INLET NO.1 
  4. REMOVE INTAKE AIR CONNECTOR PIPE 
    1. Disconnect the air hose and ventilation hose.
    2. Remove the bolt.
    3. Loosen the 2 hose clamps and remove the intake air connector pipe.
  5. REMOVE THROTTLE BODY ASSY 
    Fig 1: Removing Bolts, Nuts And Throttle Body And Gasket
    G02998071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the water bypass hose and water bypass hose No. 7.
    2. Disconnect the connector.
    3. Remove the 2 bolts, 2 nuts, throttle body and gasket.
  6. INSTALL THROTTLE BODY ASSY 
    Fig 2: Installing Bolts, Nuts And Throttle Body And Gasket
    G02998072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Install a new gasket and the throttle body with the 2 bolts and 2 nuts.
      1. Torque: 18 N.m (185 kgf.cm, 13 ft.lbf) 
    2. Connect the water bypass hose and water bypass hose No. 7.
    3. Connect the connector.
  7. INSTALL INTAKE AIR CONNECTOR PIPE 
    1. Install the intake air connector pipe with the bolt and 2 hose clamps.
      1. Torque: 
      2. 4.0 N.m (41 kgf.cm, 35 in..lbf) for hose clamp 
      3. 5.0 N.m (51 kgf.cm, 44 in..lbf) for bolt 
    2. Connect the air hose and ventilation hose.
  8. INSTALL AIR CLEANER INLET NO.1 
  9. INSTALL V-BANK COVER 
    1. Torque: 5.0 N.m (51 kgf.cm, 44 in..lbf) 
  10. REFILL ENGINE COOLANT (See  ENGINE COOLANT  ) 
  11. CHECK FOR ENGINE COOLANT LEAKS (See  ON-VEHICLE INSPECTION  ) 
  12. INSPECT THROTTLE BODY FUNCTION (See  ON-VEHICLE INSPECTION   ) 
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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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