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HOMESERVICE MANUALSTOYOTA2012PRIUS THREEREPAIR AND DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEM (EXCEPT PLUG-IN) (SERVICE INFORMATION)RADIATORREMOVALREMOVAL
2012 Toyota Prius Three

Engine Cooling System (Except Plug-In) (Service Information): Radiator: Removal: Removal

2012 Toyota Prius ThreeSECTION Removal
  1. REMOVE RADIATOR SUPPORT OPENING COVER  . Refer to REMOVAL - Step 1
  2. REMOVE REAR NO. 2 FLOOR BOARD (for Separate Type)  . Refer to REMOVAL - Step 1
  3. REMOVE REAR DECK FLOOR BOX  . Refer to REMOVAL - Step 2
  4. REMOVE REAR NO. 3 FLOOR BOARD  . Refer to REMOVAL - Step 3
  5. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
  6. REMOVE NO. 1 ENGINE UNDER COVER 
  7. DRAIN ENGINE COOLANT (for Engine)  See step  2
  8. DISCONNECT NO. 1 RADIATOR HOSE 
    1. Disconnect the No. 1 radiator hose from the radiator assembly.
      Fig 1: Identifying No. 1 Radiator Hose From The Radiator Assembly
      GTY226823Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. DISCONNECT NO. 2 RADIATOR HOSE 
    1. Disconnect the No. 2 radiator hose from the radiator assembly.
      Fig 2: Identifying No. 2 Radiator Hose From The Radiator Assembly
      GTY226652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE FRONT BUMPER ASSEMBLY  . Refer to REMOVAL - Step 2
  11. REMOVE MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Dynamic Radar Cruise Control System)  . Refer to REMOVAL - Step 3
  12. REMOVE MILLIMETER WAVE RADAR SENSOR BRACKET  . Refer to REMOVAL - Step 9
  13. REMOVE NO. 1 INVERTER BRACKET  . Refer to REMOVAL - Step 12
  14. REMOVE HOOD LOCK SUPPORT SUB-ASSEMBLY 
    1. Disconnect the water by-pass hose clamp from the radiator support RH.
      Fig 3: Identifying Hood Lock Support Sub-Assembly, Hood Lock Connector & No. 2 Cooling Fan Motor
      GTY224105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the hood lock connector and hood lock control cable wire.
      Fig 4: Identifying Hood Lock Control Cable Wire, Connector & Clamps
      GTY216899Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 3 wire harness clamps.
    4. Disconnect the connector from the No. 2 cooling fan motor.
      Fig 5: Identifying No. 2 Cooling Fan Motor Connector
      GTY223417Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the 2 wire harness clamps and connector from the fan shroud and cooling fan motor.
      Fig 6: Identifying Wire Harness Clamps And Connector
      GTY223582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the 2 horn connectors.
      Fig 7: Identifying Horn Connectors
      GTY226268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Remove the 2 bolts, radiator support RH and radiator support LH with the 2 cushions from the upper radiator support.
      Fig 8: Identifying Radiator Support RH/LH, Cushions From Upper Radiator Support & Bolts
      GTY223911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Remove the 4 bolts and upper radiator support.
      Fig 9: Identifying Upper Radiator Support & Bolts
      GTY215970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. REMOVE AIR CLEANER CAP SUB-ASSEMBLY  . Refer to REMOVAL - Step 30
  16. REMOVE INLET AIR CLEANER ASSEMBLY  . Refer to REMOVAL - Step 31
  17. REMOVE AIR CLEANER CASE  . Refer to REMOVAL - Step 32
  18. REMOVE NO. 2 FAN SHROUD 
    1. Disconnect the No. 1 water by-pass hose from the radiator assembly.
      Fig 10: Identifying No. 1 Water By-Pass Hose & Radiator Assembly
      GTY232904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the water by-pass hose from the radiator assembly.
      Fig 11: Identifying Water By-Pass Hose And Radiator
      GTY216577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the 6 water by-pass hose clamps from the No. 2 fan shroud.
      Fig 12: Identifying Water By-Pass Hose Clamps And No. 2 Fan Shroud
      GTY223725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 2 bolts and No. 2 fan shroud from the radiator assembly.
      Fig 13: Identifying Radiator Assembly, No. 2 Fan Shroud & Bolts
      GTY216387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. REMOVE RADIATOR ASSEMBLY 
    1. Remove the radiator assembly with the fan shroud.
      Fig 14: Identifying Radiator Assembly
      GTY216698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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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.