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Powertrain Problem; ID 276; BSM: V_ESS Too Low During Precharge

Discussion in 'Roadster 2008-2012' started by DeedWest, Sep 11, 2016.

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  1. Hsujonn

    Hsujonn Member

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    Los Angeles
  2. DeedWest

    DeedWest 2008 VP & 2011 2.5 Sport

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    Dallas, TX
    What version is your Roadster? 1.5 or 2.0?
     
  3. Hsujonn

    Hsujonn Member

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    I have the 1.5. Definitely going to dig into this issue and find out where the water intrusion lies and see if there's a fix.

    Update: i let the roadster sit for two days in a warm garage to let the water evaporate and it's taking a charge! phew...
     
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  4. DeedWest

    DeedWest 2008 VP & 2011 2.5 Sport

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    With the 1.5, this is what I was going to suggest. In intense humidity, it can throw these faults but just needs to sit for a day or two. This happened to my 1.5 after I drove through a storm in Texas and tried to charge in a humid parking garage. It didn’t take a charge until the morning.

    If you can get it to turn on, a tip I learned was to put the vehicle in Drive, hold the brake, and accelerate lightly to push some amps (8-12A on the screen) through the motor and heat it up. This allowed me to charge.
     
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  5. DanielFriederich

    Joined:
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    Location:
    Neusatdt/W., Germany
    since 1.5ers use part of the coil of the motor when charging (TZero patent) that makes sense. Otherwise it sounds much for trouble (moisture) in the DC/DC converter in the front.
    One guy disassembled it and changed the faulty parts; can't find it back but I guess it was on the Facebook Roadster group...
     
  6. X.l.r.8

    X.l.r.8 Supporting Member

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    I’m not sure that was ever brought to a successful conclusion. I remember him changing components, but then I thought he ended up having to replace the unit, but I don’t remember. It was a very descriptive post though
     

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