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Getting the ICE to run on demand

Discussion in 'Gen 3 Prius Technical Discussion' started by adrianblack, Oct 19, 2009.

  1. adrianblack

    adrianblack Member

    Joined:
    Sep 26, 2009
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    Location:
    Los Angeles
    Vehicle:
    2010 Prius
    Model:
    III
    I noticed something interesting yesterday.... Useless but interesting.

    Coolant Temp above 157F, "READY" and at a complete stop.

    In Neutral:
    - No matter how much throttle input you give the car, nothing happens at all.

    In Park:
    - If you give the car any throttle input at all, the ICE starts. But it stops as soon as you let go of the throttle.
    - The RPM does not vary with amount of throttle input. The engine (if I recall) was at around 1000rpm.
    - While ICE is running, the MFD does not indicate any charging is happening, so it seems like the engine is just is idling the the MG1/MG2 is free wheeling.

    I wonder why Toyota did this? Perhaps it's to help diagnostics in the future -- a way to get the ICE to run during testing?
     
    #1 adrianblack, Oct 19, 2009
  2. Philosophe

    Philosophe 2010 Prius owner

    Joined:
    Jun 2, 2009
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    Location:
    Montréal, Québec (Canada)
    Vehicle:
    2010 Prius
    Model:
    N/A
    The most probable and simple answer is to allow mechanics to make the engine run on demand during/after their work on the ICE.
     
    #2 Philosophe, Oct 19, 2009
  3. pinzvidz

    pinzvidz Junior Member

    Joined:
    Aug 25, 2009
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    Location:
    Australia
    Vehicle:
    Other Hybrid
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    Can't tell you why TMC did that, but it's not how techs set the engine to run constantly. Have a look here for the actual procedure.
     
    #3 pinzvidz, Oct 19, 2009
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