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Gen 3 Prius Battery Fan Operation

Discussion in 'Gen 3 Prius Technical Discussion' started by Shady Ghabboun, Jul 26, 2021.

  1. douglasjre

    douglasjre Senior Member

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    Anyone know how to change setting so I don't need dongle continuously inserted?
     
  2. ChapmanF

    ChapmanF Senior Member

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    I've never seen it suggested that there is any such setting. The app acts by overriding the car's control of the fan, while it is connected.

    If the normal behavior of the fan is coded into the firmware of the ECU, it could be changed by obtaining a copy of that firmware, changing the code, and then reflashing the ECU with the altered firmware, assuming it will even accept altered firmware without a cryptographic signature from Toyota.
     
  3. ASRDogman

    ASRDogman Senior Member

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    techstream, Xtool D8....