Inverter Coolant leak, followed by ABS and brake lights up

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by DongFeng, Jun 27, 2016.

  1. DongFeng

    DongFeng New Member

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    I have a 2012 Prius Two (27,XXX miles) that suddenly had check engine light on. I stopped and discovered the leakage of inverter coolant from the inverter cooler/radiator, which was probably damaged by a small piece of rock on the highway. I called AAA tow truck that towed it home. After arriving home, I discovered that in addition to the check engine light, the ABS and brake lights are on now. I have ordered a new inverter cooler online and plan to replace it myself. The code error is P0C73.

    My questions are

    1. Why did the ABS and brake lights light up? Could it be a problem caused by inappropriate towing? The Prius was towed while in the Parking mode (hybrid on), with parking brake released, and the front wheels on the wheellock and the rear wheels on the ground.

    2. How do I know if my inverter coolant pump and inverter are still working?

    3. How do I change the inverter cooler? Any guides available for 2012 Prius.

    Thanks in advance to the experts out there.
     
  2. JC91006

    JC91006 Senior Member

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    I suspect your 12v battery is drained, check voltage
     
  3. tankyuong

    tankyuong Senior Member

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    hope you didn't fry your inverter
     
  4. JC91006

    JC91006 Senior Member

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    What is an inverter cooler? The radiator from the car does not cool the inverter, it's only for the engine.
     
  5. spiff72

    spiff72 Member

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    I could be wrong, but I think there is a separate radiator for the inverter coolant (similar to a transmission cooler).

    Also, just a thought regarding ABS and brake lights. When you say "hybrid on", are you stating that the vehicle was towed while in "Ready" mode? Could the system have been confused by the fact that the rear wheels were in motion while the vehicle was in Park?
     
  6. DongFeng

    DongFeng New Member

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    Update, I have changed the inverter cooler (radiator) and after that all lights went off.
     
    Xterra72, Rebound and CR94 like this.
  7. Rebound

    Rebound Senior Member

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    That's right. The voltage inverter, which converts the DC power from the battery into AC power for the motor (and vice-versa) can get hot. So there is a separate radiator cooling system for this inverter. This is why, if you look under the hood of your Prius, you'll see two reservoirs with pink coolant.
     
  8. Rebound

    Rebound Senior Member

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    You're a stud!
    I hope you used the Toyota coolant (pink) when you refilled the coolant.
     
  9. DongFeng

    DongFeng New Member

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    The problem now is, after AAA towed my car with rear wheels on the ground, the slip indicator light came on. I have disconnected the negative terminal of the 12V battery and left it disconnected for 30 minutes. After I turned on the car, the yellow slip indicator is still there. What can I do to make the light go away? BTW, The car can be driven without problems.
     
  10. JC91006

    JC91006 Senior Member

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    Rear wheels on the ground is the correct way to tow, front wheels on the ground would be a problem
     
  11. tankyuong

    tankyuong Senior Member

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    drive 3 blocks away it should turn off automatically
     
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