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P0A1D - HV Control - Replaced - No Ready Light

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by tracy ing, Dec 22, 2017.

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  1. Dxta

    Dxta Senior Member

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    Have you checked the HV and its voltage sense wires hooking up to the battery ECU? As long as you still ha e same problems with all the ECUs you ha e tried, then the problem isn't from the ECU.
     
    #21 Dxta, Feb 15, 2018
  2. tracy ing

    tracy ing Active Member

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    Are you asking if I have checked the voltage of the hybrid battery pack ?
     
    #22 tracy ing, Feb 15, 2018
  3. tracy ing

    tracy ing Active Member

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    The original code P0A1D indicated no voltage to bus for Hybrid Powertrain Control Module
    This new code indicates that the bus is down completely, at the hvpcm.
    my code reader no longer sees the three modules it used to see, it sees one, and reports this new code
    U0293 Lost Communication With Hybrid Powertrain Control Module
    one interpretation says the engine ECU is not getting data back on the bus from the Hybrid Powertrain Control Module
     
    #23 tracy ing, Feb 15, 2018
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