2006 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Throttle Body ASSY: Replacement

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag activation.

  2. DRAIN ENGINE COOLANT 
  3. REMOVE V-BANK COVER 
    1. Remove the 2 nuts and V-bank cover.
  4. REMOVE AIR CLEANER INLET NO.1 
  5. REMOVE INTAKE AIR CONNECTOR PIPE 
    1. Disconnect the air hose and ventilation hose No. 1.
    2. Loosen the 2 hose clamps and remove the intake air connector.
  6. REMOVE THROTTLE BODY ASSY 
    1. Disconnect the connectors and wire.
    2. Disconnect the water by-pass hoses.
    3. Remove the 2 bolts, 2 nuts, throttle body and gasket.
  7. INSTALL THROTTLE BODY ASSY 
    1. Install a new gasket and the throttle body with 2 bolts and 2 nuts.

      Torque: 18 N.m (184 kgf.cm, 13 ft.lbf 

    2. Connect the water by-pass hoses.
  8. INSTALL INTAKE AIR CONNECTOR PIPE 
    1. Install the connector pipe with the bolt and hose clamp.

      Torque: 

      4.0 N.m (41 kgf.cm, 35 in.lbf) for hose clamp 

      5.0 N.m (51 kgf.cm, 44 in.lbf) for bolt 

    2. Connect the air hose and the ventilation hose No.1.
  9. INSTALL AIR CLEANER INLET NO.1 
  10. INSTALL V-BANK COVER 
    1. Install the V-bank cover with the 2 nuts.

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

  11. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  12. PERFORM INITIALIZATION (See  INITIALIZATION  ) 
    NOTE:

    Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.

  13. ADD ENGINE COOLANT 
  14. CHECK FOR ENGINE COOLANT LEAKS (See  COOLING SYSTEM  ) 
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.