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Hybrid Transaxle On-Vehicle Repair

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. Replace Transaxle Oil: 

    Fluid type: ATF Type T-IV  :

    Capacity: 4.6 liters (4.9 US qts, 4.0 Imp. qts)  .

    Torque: 49 N.m (498 kgf.cm, 36 ft.lbf)  .

    Fig 1: Locating Transaxle Oil Drain Plug
    G01065919Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Locating Transaxle Oil Level Check Plug
    G01065920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Replace Coolant: 
    1. Remove the reservoir tank cap of the inverter.
    2. Remove the drain plug and drain the coolant.
      Fig 3: Locating Coolant Drain Plug
      G01065921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Install the drain plug with a new gasket.
    4. NOTE: To prevent coolant from splashing, place a shop rag on the overflow pipe as shown in Fig 4.
    5. Loosen the 2 bleeder plugs and connect the hoses.
    6. Supply coolant from the reservoir tank.
      Fig 4: Placing Shop Rag In Reservoir To Prevent Coolant Splashing
      G01065922Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Supply coolant until coolant level in the hose connected to the bleeder plugs reaches the same level with FULL of the reservoir tank as shown in Fig 5.
      Fig 5: Verifying Level Of Coolant In Bleeder Plug Connect Hoses
      G01065923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Tighten the 2 bleeder plugs.
    9. Turn the ignition switch ON and active the water pump.
    10. Leave it as it is for approximately 20 seconds.
    11. Turn the ignition switch OFF.
    12. Loosen the 2 bleeder plugs to bleed air.
    13. Close the 2 bleeder plugs again.
    14. Repeat step ( h) to ( l) until the operation sound of the pump becomes lower and Coolant in the reservoir tank moves faster.
    15. With the ignition switch ON, wait for approximately 5 minutes.
    16. Adjust the coolant level inside the reservoir tank as shown in Fig 6.
      Fig 6: Checking Coolant Level
      G01065924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002