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Really dumb question du jour-does my 2010 have an S-belt?

Discussion in 'Gen 3 Prius Main Forum' started by Dale Earnhadrt, Apr 18, 2015.

  1. Dale Earnhadrt

    Dale Earnhadrt Junior Member

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    I looked all over that engine. Just changed the spark plugs at 116k. Piece of cake. Figured I'd do the S-belt but could not find anything that looked like an S-belt. Do I even have one? The radiator fan is electric, the power steering is electric. The A/C compressor may be directly driven off the motor via gear drive or it may have its own electric motor. So, it is possible that there may not be an s-belt.

    But the auto parts store sold me an s-belt, so there's gotta be one, right?
     
  2. David Beale

    David Beale Senior Member

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    There are no belts on a GIII Prius.
     
  3. fuzzy1

    fuzzy1 Senior Member

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    AC is electrically driven, the motor does not need to be running.
    The belt-less engine was actually one of the highlighted features of the 2010. (My first Prius was a 2010, almost six years ago now.)
    Did their book actually show it for the 2010, or did the counter person assume it would be the same as the 2009?

    At least this should make for an easy return, because the part cannot possibly be used for its intended application.
     
  4. Dale Earnhadrt

    Dale Earnhadrt Junior Member

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    In my best Homer Simpson....

    DuOhhhhhh!
     
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    I'm not the sharpest knife in the block, so I'll bite: what IS an S-Belt? Serpentine Belt? And yeah, I know there aren't any belts on 3rd gen., just curious about the expression.
     
  6. bisco

    bisco cookie crumbler

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    snake, serpent, basilisk.
     
  7. Dale Earnhadrt

    Dale Earnhadrt Junior Member

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    yup...it means serpentine belt.
     
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  8. bisco

    bisco cookie crumbler

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    Seat belt.
     
  9. Reaper

    Reaper Junior Member

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    ?? My a/c won't come on unless the car is on. If the car is on then either the engine or electric motor is on. Are you saying there is a way with the car off to turn the a/c on? I can get the radio to turn on, but not the a/c
     
  10. FuelMiser

    FuelMiser Senior Member

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    I think the point is that the A/C does not require the ICE ( gas engine ) to be running, such as when you are stopped and engine has shut off. You must be in READY mode, though, not just ACC mode.
     
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  11. fuzzy1

    fuzzy1 Senior Member

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    The AC can be on whenever the Ignition is Ready.

    The underlined stated is false. The Power switch (Ignition) can be On and Ready, yet both the gasoline engine and electric motors shut down. Examples include (1) when the gear selector is in Park and the gas engine does not need to run for warmup or battery charging, and (2) when the gear selector is placed in Neutral while the gas engine is not spinning, so the entire propulsion system is shut down.

    The AC doesn't use any of the propulsion motors, it has its own right-sized electric motor. This also means the AC can be more self-contained and better sealed than can regular systems powered by an external variable-speed rotating shaft from a vibrating motor tied to flexible mounts, thus requiring flexible hose connections.

    If you haven't yet taken your Prius through a drive-through tunnel car wash in summer, you may be in for more Prius AC lessons. Your AC will still work after the car is put into mandatory Neutral (all propulsion systems shut down), but if the traction battery charge is low at the start, it may very quickly get depleted with warning alarms lighting up and buzzing. The solutions are found in several different threads.
     
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  12. Reaper

    Reaper Junior Member

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    So if I'm in the car and I press the break and hit the start button To start the vehicle that doesn't mean the engine or the electric motor is on?? I can enter the vehicle and press the start button and it will turn on the radio. If I hit it again it will turn the vehicle LCD screen on and I can also turn the " air " on, but not the a/c. If I start the car (break and button) I then can access the a/c and turn it on.
     
  13. fuzzy1

    fuzzy1 Senior Member

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    Your observations about what works in the various states of the Power/ignition/start button, are correct. Both propulsion and AC require it to be in the same state, the last one on your list, and getting into that state requires hold down the brake pedal.

    But just because the Power button is in that state doesn't mean either the gasoline engine or any of the electric motors are actually turned on. The AC will still work even when they are off. This will become more obvious if you ever take the car through a tunnel car wash, the type where the sign commands you to put the transmission in Neutral and keep your foot off the brake as the trolley pulls the car through.
     
  14. bisco

    bisco cookie crumbler

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    the a/c has it's own electric motor. it is run by the 12 volt, which is recharged by the hybrid battery, unless you're in neutral. the engine and electric propulsion motors do not need to be running, you just need to be in 'ready' mode.
     
    #14 bisco, Apr 19, 2015
    Last edited: Apr 19, 2015
  15. fuzzy1

    fuzzy1 Senior Member

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    I thought previous discussion had determined that the AC compressor is run direct from the high voltage, not from 12V. The HV->12V inverter isn't big enough to power the AC.
    Make that 'even when you're in neutral'. Neutral completely shuts down MG1 and MG2, halting propulsion and new generation and re-generation, but it doesn't shut down the traction battery or AC or the HV->12V inverter.
     
  16. bisco

    bisco cookie crumbler

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    i think you're right, sorry, i misremembered.:) iirc, when some people have come out of a car wash with the car in neutral, the engine wouldn't start. is this because the computer allows the hv battery to fall below the minimum?
     
  17. Mike500

    Mike500 Senior Member

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    Since the crankshaft pulley on the Gen III Prius is the same ao the one used on the Corolla, it does hae multi-v belt grooves. But, is has no belt on it.
     
  18. WilDavis

    WilDavis Senior Member

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    "Slytherin" surely, Shirley!