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Prius Radar Detector - Truth or Urban Legend?

Discussion in 'Gen 2 Prius Audio and Electronics' started by mboileau, Jul 23, 2004.

  1. mboileau

    mboileau New Member

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    When I had my car in for service yesterday, one of the service guys and I were having a little game of "quid pro quo". I'll tell you something you didn't know about the Prius if you tell me something... He told me one very interesting anomaly with the NAV system. According to this guy, if you're viewing the NAV screen and watching the little arrow icon (your car) moving along the marked route, and it suddenly jumps to one side of the road or the other and then continues moving in the right direction, but off of the road, it's entirely likely that a cop has a radar gun pointed at you. The claim is that the police radar gun distorts the GPS signals ever so slightly, but enough to cause a shift on your map. Car jumps to the side, radar on. Car jumps back on the road, radar off.

    If it's true, it's an awesome little feature. The question is, how do you prove that it works? Anyone know a cop with a radar gun?
     
  2. efusco

    efusco Moderator Emeritus
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    Sounds a bit bogus to me, and with the dead reconning system in the Prius even if the GPS signal is lost the speed and directional sensor will keep you on track for a while. I suppose that if a cop locked on a radar, at close range, for a long period of time then, maybe, it would be enough to slightly throw the signal off to a degree you could detect on the NAV screen.

    If you want to substitute it for a radar detector, I think you'd better be ready to pay some speeding tickets.

    I don't have proof, but I'd be pretty quick to throw that into the Urban Myth category.
     
  3. mboileau

    mboileau New Member

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    I completely agree with you, Evan, except that I have indeed seen the mysterious icon shift he described since I've had the car. If it weren't for that, I'd dismiss it as myth without a second thought. But part of me wonders...

    That does remind me... I was running late getting to work this morning and was screaming down the freeway faster than normal. Not exactly an "unsafe velocity", but when the freeway is perfectly straight and level for long distances, the Prius can get moving at a pretty good clip. I merged onto another freeway still going as fast and saw a highway patrol car coming up fast behind me. I thought I was nailed, so I slowed down and started to work my way over to the right. He caught up to me, seemed to be staring at the car for a moment (I have the white vinyl lettering on the back that says GasElectricHybrid), and then just passed me and moved on.

    After all, one of those hybrids can't go that fast, right? :wink:
     
  4. davidbw

    davidbw Member

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    The LAPD was kind enough to place one of their stationary radar devices, on a street near where I live. I drove by it several times, and there was no "glitch" on my GPS/Nav unit.

    A stationary radar device is a device that says "Your Speed is: ____" while you are driving towards it. It is a solar powered, stationary, fixed radar unit to encourage people not to speed in a certain area without assigning an officer to actually write tickets.
     
  5. mboileau

    mboileau New Member

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    I forgot about those! There are a couple around here I can drive by and test it out for myself.
     
  6. Patman36

    Patman36 New Member

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    Not to get too far off topic, anyone know where the easiest wire to get access to is for hardwiring a radar detector in? I can crimp onto the wire, I just need a good ACC-On wire. Anything near the glove box?

    Patrick :)
     
  7. HTMLSpinnr

    HTMLSpinnr Super Moderator
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    The power outlet is located not too far from that location.
     
  8. Batavier

    Batavier Member

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    I like those, it's always good to try to pass those things as fast as possible... but of course I would not do something like that... *grins*
     
  9. AlphaTeam

    AlphaTeam Member

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    I want to get a good radar detector in my car when I get it. But I don't want some device on my dash. Are there any good ones that can be hidden or intigrated into the car somehow?

    Alpha
     
  10. Patman36

    Patman36 New Member

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    So you think tapping into the plug's power source would work? I'll have to check it out.

    In terms of hiding a radar detector, I have a Valentine 1 with a remote display. I will hide the detector behind and to the right of the rear view mirrow (to the right so the rear laser can poke out). You can then put the remote display on your dash somewhere with velcro. People ask what it is, you can make up anything you want. Never had a problem in the years I have owned it.

    Patrick
     
  11. brosnan

    brosnan Member

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    Tapping into the front power outlet

    Here's a photo of the front power outlet connections. First you pull the plastic pin out by pulling the bottom plastic edge toward the passenger door (labelled 1 in the photo). The pin may go flying, so be prepared to catch it. Then grab under the power socket and pull the plastic panel toward the rear of the car (2 in the photo). Then cut away the black plastic covering the two wires leading to the socket. Depending on the size of the wires you use, this Radio Shack wire tap: http://www.radioshack.com/product.asp?cata...ct%5Fid=64-3052 might do the trick.
     
  12. Patman36

    Patman36 New Member

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    Re: Tapping into the front power outlet

    Thanks for taking the time to post that! I have everything I need now, I really appreciate your help.

    Patrick
     
  13. Steve Goldenberg

    Steve Goldenberg New Member

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    The jumping arrow is more likely being caused by the "snap to road" feature that tries to put the calculated location right on the nearest road. It's a very nice feature that keeps your anxiety low. I have one section of I-70 where the map is way off and the arrow is cruising through a meadow for a mile or so, then it snaps back to the map.
     
  14. sodium11

    sodium11 New Member

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    I have a Valentine One, the old style, about 7 years old - the all-in-one body design, with no remote display. I had it installed in my Camry, right above the inside rear-view mirror (the wiring went directly into the fuse box with the power cord hidden in the A-pillar and in the crack between the windshield and the headliner).

    I'm planning to transplant this unit into my new Prius when I get it, and I had a couple of questions.

    1. In some photos, it appears that the glass above the inside-rear view mirror, i.e. the top center of the windshield, is blacked out. Is the case in every Prius and if so, is there anything one can do to change that? I'm afraid that my fave location for the radar detector will be unusable in the Prius if that spot is blacked out.

    2. If I can't use that spot, does anyone have a better idea for a location where I can put the radar unit so that (1) it will have an effective range ahead and behind (2) it will not be too visible from outside the car, and (3) I can easily conceal the power cord and do a semi-permanent install?

    Thanks in advance for all of your advice.

    sodium11
     
  15. mboileau

    mboileau New Member

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    The Prius dashboard is quite level and goes quite a distance out to the edge of the glass. I would think you could simply mount it flush against the top of the dash close to the window and route the wire along that edge to the side of the dash and down.
     
  16. bruceha_2000

    bruceha_2000 Senior Member

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    Not to be a spoilsport or anything, but the cruise control works really well. No need for a radar detector to warn you "just in case you get distracted and end up exceeding the speed limit".
     
  17. sodium11

    sodium11 New Member

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    mboileau, thanks for the tip, I'll strongly consider that placement. One question, though, if the RD is placed up there, is it within arm's reach? The unit has a mute/volume knob on the front that I find myself using now and then - would be a pain to reach that control from the driver's seat while driving?
     
  18. DaveinOlyWA

    DaveinOlyWA 3rd Time was Solariffic!!

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    its hard to imagine a signal in the low megahertz range (radar) affecting something in the upper microwave range (GPS in the gigahertz range)

    actually what we need is radar detector built in to the system where if a signal is detected it simply overides the TFT display.
     
  19. Huck

    Huck New Member

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    Does this happen every time? I experienced this glitch once, on my first Prius trip (home from WV), and have never seen it since. It was disturbing to see my little icon traveling off in the bushes and fields, but I was able to visually confirm that I was, in fact, still on the road. I assumed it was an error in the map data. I assumed it could be reproduced, but I've never driven that stretch of road again.

    Clearly, if it can be reproduced, it's probably not radar, in addition to the other reasons stated in this thread about why it's not radar.
     
  20. hdrygas

    hdrygas New Member

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    On the iQue you see this when the digital map does not match the road or you are getting a poor signal. When I drive down the drive way at work I see it because our driveway is not in the database but the apartment complex and assisted living center next door and 6 feet away is. I will drive along and pop I am in the dive way next door. Funny thing is that we have been here years more that the folks next door and have a city bus stop on our loop drive.