2008 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE

Throttle Body: Removal

  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 and seat belt pretensioner activation.
  2. REMOVE ENGINE UNDER COVER LH 
  3. DRAIN ENGINE COOLANT  (See COOLANT )
  4. REMOVE RADIATOR SUPPORT OPENING COVER 
    1. Remove the 6 clips and radiator support opening cover.
      Fig 1: Locating Radiator Support Opening Cover Clips
      G05189000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE AIR CLEANER ASSEMBLY 
    1. Disconnect the MAF meter connector.
    2. Disconnect the wire harness from the wire harness clamp.
    3. Loosen the hose clamp bolt, and then disconnect the No. 1 air cleaner inlet.
      Fig 2: Locating Hose Clamp Bolt
      G05189001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 2 bolts.
    5. Loosen the hose clamp bolt, and then remove the air cleaner.
      Fig 3: Locating Hose Clamp Bolt
      G05189002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE THROTTLE BODY ASSEMBLY WITH MOTOR 
    1. Disconnect the ventilation hose.
    2. Disconnect the No. 2 ventilation hose.
    3. Disconnect the No. 1 fuel vapor feed hose.
      Fig 4: Locating No. 1 Fuel Vapor Feed Hose
      G05189003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the water by-pass hose.
    5. Disconnect the No. 2 water by-pass hose.
      Fig 5: Locating No. 2 Water By-Pass Hose
      G05189004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the throttle control motor connector.
    7. Disconnect the throttle position sensor connector.
      Fig 6: Locating Throttle Position Sensor Connector
      G05189005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Remove the bolt, 2 nuts and throttle with motor body.
      Fig 7: Locating Motor Body Bolts
      G05189006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Remove the gasket from the intake manifold.
      Fig 8: Locating Intake Manifold Gasket
      G05189007Courtesy 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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