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Stump the Chump!

Discussion in 'Gen 2 Prius Main Forum' started by ZC1, Jun 6, 2008.

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  1. ZC1

    ZC1 Junior Prius Owner

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    O' my. I've done both and more, for sure, I never saw anything like your picture. It must be the cameraman.
    ;)

    ZC1
     
    #121 ZC1, Jun 21, 2008
  2. Bill Merchant

    Bill Merchant absit invidia

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    left front wheel well/arch
    brake line and speed sensor wire
     
    #122 Bill Merchant, Jun 21, 2008
  3. galaxee

    galaxee mostly benevolent

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    rear wheel well- what side has the fuel filler down there?
    fuel system vent tube
     
    #123 galaxee, Jun 21, 2008
  4. patsparks

    patsparks An Aussie perspective

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    We have a winner!!!

    There are actually 3 pipes in the picture which was taken with the camera right under the wheel arch, that is why I had to cover the flash.

    On the far left of shot is the fuel filler pipe and centre and right are 2 vent pipes. The caked on dirt look is actually sound deadening material appied by Toyota although there are some brown spots of dirt from a recent trip. I put some lines on this picture to make it easier to see.
    [​IMG]
     
    #124 patsparks, Jun 22, 2008
  5. galaxee

    galaxee mostly benevolent

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    ok- will get the next one up tonight when we've got a minute.
     
    #125 galaxee, Jun 22, 2008
  6. galaxee

    galaxee mostly benevolent

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    ok. major and possibly dangerous disassembly required. you likely have not seen this in person.

    2 good clues to start off, have a shot.

    [​IMG]
     
    #126 galaxee, Jun 22, 2008
  7. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Location: Interior of brake control power supply unit, located near the 12V auxiliary battery in the right-rear hatch floor
    Purpose: Electrolytic capacitors storing emergency power for brake system in the event of a 12V bus power failure
     
    #127 Patrick Wong, Jun 22, 2008
  8. galaxee

    galaxee mostly benevolent

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    that is correct! :)

    guess that was too easy... next time you guys are in for it.
     
    #128 galaxee, Jun 22, 2008
  9. efusco

    efusco Moderator Emeritus
    Staff Member

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    Cool, I hadn't seen pix of those before...nice.
     
    #129 efusco, Jun 22, 2008
  10. patsparks

    patsparks An Aussie perspective

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    Now I won't need to electrocute myself pulling that apart to see what is in it.
    If it is an emergency brake power supply and the brake servo is in the front of the car why is this unit in the back?
    Sorry I know this is off topic.
     
    #130 patsparks, Jun 22, 2008
  11. Patrick Wong

    Patrick Wong DIY Enthusiast

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    OK, here's a photo out of my archives...

    What is the location and purpose of the cutout in the center of the photo.
     
    #131 Patrick Wong, Jun 22, 2008
  12. galaxee

    galaxee mostly benevolent

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    pat: DH says "beats the $%#^ out of me!"

    patrick: under windshield wiper cowling cover
    allows water to drain
     
    #132 galaxee, Jun 22, 2008
  13. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Hi Galaxee,

    Excellent answer - now you can post your tough photo.
     
    #133 Patrick Wong, Jun 22, 2008
  14. patsparks

    patsparks An Aussie perspective

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    Wooooh you are good!!!
     
    #134 patsparks, Jun 22, 2008
  15. galaxee

    galaxee mostly benevolent

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    dang. now we have to come up with it :p
     
    #135 galaxee, Jun 22, 2008
  16. galaxee

    galaxee mostly benevolent

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    another major disassembly item. the part in question is the line in the foreground.

    [​IMG]
     
    #136 galaxee, Jun 22, 2008
  17. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Location: On top of the fuel tank
    Purpose: Vent hose connecting charcoal canister and fuel tank.
     
    #137 Patrick Wong, Jun 23, 2008
  18. patsparks

    patsparks An Aussie perspective

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    Fuel filler hose inside the fuel tank from the subtank along side the bladder to the plate shown on the left of shot which allows the filler pipe to go through the steel outer housing of the tank.
     
    #138 patsparks, Jun 23, 2008
  19. galaxee

    galaxee mostly benevolent

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    location is correct.
    purpose is almost correct. technically, this particular line does not connect to the charcoal canister.

    geez, i hope this was at least sorta hard. have our fuel tank dissection photos made it that far around the world, or has someone else done it?
     
    #139 galaxee, Jun 23, 2008
  20. ZC1

    ZC1 Junior Prius Owner

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    According to what literature I can find, the unit is not exactly the brake control power supply unit as stated by Pat
    but the "power source BACKUP unit." Unless it serves a dual purpose, it doesn't supply power to the brake control unit during normal operation.
    Of course, it's location is the same place as Pat mentioned.

    In the '04 & later Prius, the power source backup unit has been adopted as an auxiliary power source in order to supply power to the brake in a stable manner. This unit contains 28 capacitor cells, which store an electrical charge provided by the (12V) vehicle power supply.
    When the voltage of the (12V) vehicle power supply drops, the electrical charge stored in the capacitor cells is used as an auxiliary power supply to the brake system. The electrical charge stored in the capacitor cells becomes discharged when the HV system stops operating after the power switch is turned OFF.

    ZC1​
     
    #140 ZC1, Jun 23, 2008
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