My new VW is going to be fitted as a factory fit option with parking sensors, front and rear and therefore I pose the following question.
I can understand how the rear sensors are activated i.e. when engaging reverse gear etc. but are the front sensors active only when 1st gear is selected? If that is so then why don't they give an alarm signal when crawling slowly in traffic when the car in front is approached or has the speed of the car something to do with it?
Am I being ultra thick and missing something that is so obvious I cannot see the wood for the trees?
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Don't know for sure, but I think most manufacturers get round this by making the front sensors switch activated; i.e. you actively engage them when you are in the process of parking. HTH
Tim
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Irritatingly the sensors on both end if the CRV are full time (regardless of what gear you're in) you can switch them all off but the button and warning light are buried out of sight by your left knee and you can forget that you've turned them off - why not have a light in the binnacle on the graphic display do-dah ?
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I had front and rear sensors on my old Passat.
The front ones only came on if you had already engaged reverse as part of your parking sitution and then selected first gear after that.
They do not come on if you are parking nose in, but for parralel parking they are great.
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Mondeo:
Rear goes on when reverse is engaged, which also switches on front (and leaves front on when forward gear engaged)
Front and rear turned off automatically at 10 mph
Readily available independent switches for front and rear so easy to use when going nose-in
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Had them fitted to new Mazda 2 -- rear obviously only work in reverse - fronts are on all time in neutral and auto dissable above 5mph - there is also a switch to switch them off as sitting in car with them beeping away is a bit annoying - These are Mazda fit not aftermarket.
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Mind you did some "soft roading" in Yorkshire and they are very, very handy - the graphic tells you which sensor is activating.
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Most usually only activate the front sensors either when the button on the dash is pressed (for pulling into a space close to another object), or within so many seconds of reverse being activated (for reverse parking).
I know the Vauxhall system works like this.
Some have the front sensors on all the time, even at high speed. The Volvo system was like this and could be quite annoying when false blips were occurring in heavy rain, or when driving over steep angles, like off my driveway, etc.
Not sure what the VW system does.
For me, I wouldn't bother having the front ones, back ones do all the main work and very few cars are that hard to judge the front end, even the ones were you can't see the bonnet.
I might even consider having front ones disconnected.
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The front sensors on our pick up are activated by the brake pedal, suits a proper auto with its associated creep, wouldn't work with a manual or automated manual quite so well unless you've got 3 legs..;)
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Hmmmmmmmmm... seems more tricky than I thought. I only had the option of back and front but rear ones only would have been preferred - still we'll have to wait and see when I get mine - when, that is (yawn). I hope I'm still alive to answer that phone call telling me of its arrival in this country.
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...seems more tricky than I thought...
I'm not entirely convinced about the rear sensors on the CC3 when reversing into the back yard, oops, I mean stables, at Ifithelps Towers.
They 'read' the brick piers that form the gap, so I'm reversing in with a constant 'beeeep', which rather defeats the object.
The sensors will come in handy in other situations.
It's also the sort of option people look for on a decent-spec vehicle, so I think the OP has done the right thing in specifying them.
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What happened to the optical sensors that most humans are fitted with? Mine are still adequate for all driving situations. I do like my aircon and cruise control and without a bit of progress I suppose I would be on a horse.
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Actually the white stick works better, no parallax error, copes with brick pillars. Although maybe the sensors would stop you running over the dog, if you have forgotten to turn the hearing aid on.
:)
p
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