2012 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE

Throttle Body: Removal: Removal

  1. REMOVE NO. 1 ENGINE UNDER COVER 
  2. DRAIN ENGINE COOLANT (for Engine)  . Refer to REPLACEMENT - Step 2
  3. REMOVE NO. 2 CYLINDER HEAD COVER  . Refer to REMOVAL - Step 29
  4. REMOVE AIR CLEANER CAP SUB-ASSEMBLY 
    1. Disconnect the mass air flow meter connector.
      Fig 1: Identifying Mass Air Flow Meter Connector
      GTY224333Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Release the 2 clamps.
      Fig 2: Identifying Air Cleaner Cap, Clamps & Hose Clamp
      GTY222024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Loosen the hose clamp and remove the air cleaner cap.
  5. REMOVE INLET AIR CLEANER ASSEMBLY 
    1. Remove the 2 bolts and inlet air cleaner assembly.
      Fig 3: Identifying Inlet Air Cleaner Assembly
      GTY327354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE AIR CLEANER CASE 
    1. Remove the air cleaner filter element.
    2. Separate the hose from the 3 hose clamps.
      Fig 4: Identifying Air Cleaner Filter Element, Hose, Clamps, Air Cleaner Case & Bolts
      GTY224213Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 3 bolts and air cleaner case.
  7. REMOVE AIR CLEANER HOSE ASSEMBLY 
    1. Loosen the hose clamp and separate the ventilation hose.
      Fig 5: Identifying Air Cleaner Hose Assembly, Hose Clamp & Ventilation Hose
      GTY223684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Unlock the hose clamp and remove the air cleaner hose assembly.
  8. REMOVE THROTTLE BODY ASSEMBLY 
    1. Disconnect the throttle body connector and the 2 water by-pass hoses.
      Fig 6: Identifying Throttle Body Assembly, Connector, Bypass Hoses, Bolts & Nuts
      GTY223851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts, 2 nuts and throttle body assembly.
    3. Remove the gasket from the intake manifold.
      Fig 7: Identifying Intake Manifold & Gasket
      GTY235460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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