2011 Lexus IS 350 Base, AWDFACTORY OEM SERVICE PROCEDURE

Throttle Body: Removal: Removal

  1. REMOVE COOL AIR INTAKE DUCT SEAL  . Refer to REMOVAL - Step 1
  2. DRAIN ENGINE COOLANT  . Refer to ON-VEHICLE INSPECTION - Step 4
  3. REMOVE ENGINE ROOM SIDE COVER RH  . Refer to REMOVAL - Step 3
  4. REMOVE V-BANK COVER SUB-ASSEMBLY  . Refer to REMOVAL - Step 4
  5. DISCONNECT NO. 2 VENTILATION HOSE 
    1. Disconnect the ventilation hose from the cylinder head.
      Fig 1: Identifying No. 2 Ventilation Hose, Cylinder Head & Clamp
      GTY104804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE 
    1. Disconnect the MAF meter connector.
      Fig 2: Identifying MAF Meter Connector
      GTY101638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the clamp from the air cleaner.
    3. Disconnect the VSV hose.
      Fig 3: Identifying VSV Hose
      GTY145252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the 4 clamps.
      Fig 4: Identifying Hose Clamp And Air Cleaner Cap With Air Cleaner Hose
      GTY360459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the hose clamp and air cleaner cap with air cleaner hose.
  7. REMOVE THROTTLE BODY 
    1. Disconnect the throttle motor connector.
      Fig 5: Identifying Throttle Body & Bolts
      GTY141755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 4 bolts and disconnect the throttle body from the intake air surge tank.
    3. Disconnect the 2 water by-pass hoses from the throttle body.
      Fig 6: Identifying Throttle Body & Water By-Pass Hoses
      GTY101111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the throttle body and gasket.
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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.