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Accel Position Sensor

Discussion in 'Gen 2 Prius Technical Discussion' started by Cheap!, Oct 13, 2006.

  1. Cheap!

    Cheap! New Member

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    Does anyone know what type of comunications is transmited through the Accel Position Sensor (A13) and the Hybrid Vehicle Control ECU "H16( C )"? I was wondering if it was a data signal, a voltage signal, or just a on/off signal. Have any of you done any reasearch on this topic?
     
    #1 Cheap!, Oct 13, 2006
  2. galaxee

    galaxee mostly benevolent

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    it's a variable resistor.
     
    #2 galaxee, Oct 13, 2006
  3. ken1784

    ken1784 SuperMID designer

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    <div class='quotetop'>QUOTE(galaxee @ Oct 14 2006, 11:20 AM) [snapback]332572[/snapback]</div>
    Japanese Prius is equiped with a "hall elements" to detect the magnetic field change.

    Ken@Japan
     
    #3 ken1784, Oct 14, 2006
  4. tochatihu

    tochatihu Senior Member

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    I have a 2001 Prius, and for all those of the classic model (that I have seen) there are two ganged variable resistors. Prius applies 5 volts across the full length of the resistance track, and reads the 'divided voltage' at the wipers.

    If you want to know more about this device, see my description in the files section of the yahoo toyota-prius-sat2 group.

    Even though the technical manuals say otherwise, not until 2003 at the earliest was the change made to Hall Effect sensors. Somebody else is going to have to explain the details about how those work.
     
    #4 tochatihu, Oct 14, 2006
  5. hobbit

    hobbit Senior Member

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    [​IMG]

    .
    _H*
     
    #5 hobbit, Oct 15, 2006
  6. Cheap!

    Cheap! New Member

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    <div class='quotetop'>QUOTE(hobbit @ Oct 15 2006, 09:19 PM) [snapback]333243[/snapback]</div>
    That better then what I've been looking at. I am just trying to figure out if I can create a falls echo in the system to simulate a perfect glide pedal position electronically.

    Also here where the largest hill is an over pass it would be nice if cruise control would not engage the regen system just because I speed coasting down hill 1 mph over the set speed. Here in Houston I would like the down hills to be "run away" so if I can gain 5 mph in speed, let me., Then lets get back to cruise after I had a little bit of silent running.
     
    #6 Cheap!, Oct 15, 2006
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