2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Throttle Body: Installation

  1. INSTALL THROTTLE BODY 
    1. Install a new gasket and the throttle body with the 2 bolts and 2 nuts.

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

    2. Connect the 2 water by-pass hoses.
    3. Connect the ventilation hose.
    4. Connect the connector.
    Fig 1: Locating Bolts, Nuts And Throttle Body
    G05291605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL INTAKE AIR CONNECTOR PIPE 
    1. Install the connector pipe with the bolt and 2 hose clamps.

      Torque: 4.0 N*m (41 kgf*cm, 35 ft.*lbf) for hose clamps 

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

    2. Connect the air hose and No. 1 ventilation hose.
  3. INSTALL NO. 1 AIR CLEANER INLET 
    1. Install the air cleaner inlet with the bolt.

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

    Fig 2: Locating Connector Pipe With Bolt And Hose Clamps
    G05291608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL V - BANK COVER 
    1. Install the cover with the 2 clips.
    2. Install the 2 nuts.

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

  5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
    Fig 3: Locating Bolt And Air Cleaner Inlet
    G05291602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. PERFORM INITIALIZATION 
    1. Perform initialization (see INITIALIZATION ).
    NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
  7. ADD ENGINE COOLANT  (See COOLANT )
  8. CHECK FOR ENGINE COOLANT LEAKS  (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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