P0A0D but the interlock is pushed down

Discussion in 'Gen 2 Prius Technical Discussion' started by andy song, Feb 18, 2026 at 9:12 PM.

  1. andy song

    andy song Junior Member

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    Location:
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    Vehicle:
    2011 Prius
    Model:
    Four
    The prius won't start. Only error code is P0A0D

    We checked continuity on the service plug, the interlock harness and to the plug from the car to the interlock, all has continuity

    So the only thing I can think of is that the wiring harness going to the ECU might be cut somewhere inside the car

    Here is my question. Has anyone jumped out the interlock pins at the ECU and which 2 pins are they?
     
  2. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    The interlock circuit is a very simple series circuit that passes from an ECU pin, through cover interlock contacts in the inverter, back to the rear of the car, through the interlock contacts of the battery service plug, and to body ground.

    It is simple enough that finding the actual problem and fixing it ought to be a matter of minutes. I would consider defeating it by jumping at the ECU only as a very, very last resort.
     
  3. Tombukt2

    Tombukt2 Senior Member

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    Base
    Does the car look like wires would be cut inside of it or otherwise be fubar . This is really a stretch . A Google question will bring you up a wiring diagram of the Interlock system I do believe on the Prius from the inverter to safety plug etc . Is the fuse good in the safety plug? Like chap said it's a pretty basic system