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Engine ECU wiring diagram for coolant temperature hack

Discussion in 'Gen 4 Prius Accessories and Modifications' started by Afakan Yedi, Jan 30, 2018.

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  1. Afakan Yedi

    Afakan Yedi New Member

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    I've used this coolant temperature hack in my gen3 prius. I'd like to do the same for gen4. I need the pin information on engine ECU to access the thermistor. Anyone has tried this? or has diagram to share. thanks in advance.

    yet another thermistor hack for Gen3 | PriusChat
     
    #1 Afakan Yedi, Jan 30, 2018
  2. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    As your link says it makes sense only for the cars with PHEV kits.
    Why void your warranty?
     
    #2 Prodigyplace, Jan 30, 2018
  3. Afakan Yedi

    Afakan Yedi New Member

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    We won't tell them. ;)
    I am still looking for answer though.
     
    #3 Afakan Yedi, Jan 31, 2018
  4. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    It should be available at techinfo.toyota.com.
     
    #4 Prodigyplace, Jan 31, 2018
  5. Afakan Yedi

    Afakan Yedi New Member

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    Thanks for the link, but it requires paid subscription. Any one who has info on how about engine ECU to access the thermistor pins?
     
    #5 Afakan Yedi, Jan 31, 2018
  6. RCO

    RCO Senior Member

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    You might be lucky if @Elektroingenieur is able to help. He had the subscription but the information may be confidential and thus illegal for him to disseminate.
     
    #6 RCO, Feb 1, 2018
  7. Afakan Yedi

    Afakan Yedi New Member

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    it should be ok, just need a few pin location and maybe color of the wires. Hopefully, he gets notified with the thread...
     
    #7 Afakan Yedi, Feb 3, 2018
    RCO likes this.
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