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Hybrid battery cooling fan causing Prius to drive erradically

Discussion in 'Toyota Prius Service Bulletins - TSBs' started by ilovetrolls, Aug 2, 2011.

  1. ilovetrolls

    ilovetrolls Junior Member

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    Vehicle:
    2007 Prius
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    I live in Dallas, TX and we have had 32 100 degree days in a row. As a result of this the hybrid battery fan has been coming on more and more frequently. For some reason, this is causing my car to not use the hybrid battery when accelerating. When I go to accelerate the car takes 2-3 seconds before it will begin driving since it is not kicking on the electrical hybrid system as usual when I begin to accelerate. Please help!
     
    #1 ilovetrolls, Aug 2, 2011
  2. bisco

    bisco cookie crumbler

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    Plug-in Base
    sounds right.
     
    #2 bisco, Aug 2, 2011
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Vehicle:
    2010 Prius
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    Touring
    It might be clogged, which would aggravate things. If you can peel off the rear carpetting you can check out the fan condition yourself. If it's similar to 3rd gen it will be a bit of a fight: there are a lot of fasteners holding the carpetted deck to the battery shell. They will pop out, but they are pretty tenacious.

    (BTW, it's bad form to double post.)
     
    #3 Mendel Leisk, Aug 2, 2011
  4. andyprius

    andyprius Senior Member

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    Location:
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    There is a relationship between temperature of HV Battery and fan speed. The hotter the ambient (in car) the hotter the HV. Full use of AC, especially when first driving off may keep the HV cooler and the fan quieter. AC can then be rapidly lessened as comfort zone is reached. We have had a lot of these post this summer, probably not unlike any other summer tho. :D
     
    #4 andyprius, Aug 6, 2011
  5. MtnHighPrius

    MtnHighPrius Junior Member

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    It looks like you joined resently so Welcome.
    The fan for the hybrid battery can also work harder if the filter is clogged. some pet owners have seen this happen. The vent is on the right rear passenger side between the seat and door. it can be removed and inspected. also some times the seat belt can cover it. I believe there is a thread on this if you search.
     
    #5 MtnHighPrius, Aug 6, 2011
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