Ghost Wiper Blade???
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From: Connecticut
Ghost Wiper Blade???
I have noticed the passenger wiper blade adjusts or moves slightly, for no reason at all...its random. Very odd. I have passengers notice it as well. It seems to move slightly, but the time you hear it or catch it move in your peripheral view - its back to the spot it stays in. So weird. Anyone else experience this? Its a 2021 992. Havent driven the car in rain yet so Im talking about a stationary wiper blade.
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From: Connecticut
I was able to find some old threads about it. No definitive answer yet but what one person said was a wiper blade re-adjust. Some kind of over engineering from Porsche to extend the life of the rubber on the wiper blade by re-positioning the wiper blade slightly from time to time. (I cannot confirm or deny this).
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Not sure about extending the life of the blades; my understanding is that it’s intended to stop the blades freezing to the windscreen in very cold and dry conditions.
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Instructor
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It is as a few mentioned above in that if the wipers are not used for a predetermined time, it will adjust to flip the blade the opposite way it was at rest. Next time it is raining, turn them off and on a few times and you will note the rest portion changes.
IIRC this was first introduced within the VAG when the `VW Phaeton was lunched and since then it's been in most VAG products.
There are a ton of hidden and over engineered things within VAG products that, perhaps sadly, are never mentioned.
i.e. Your climate control system will go into re-circ mode when reversing or washing the windscreen to avoid fumes/washer fluid smell coming into the cabin.
IIRC this was first introduced within the VAG when the `VW Phaeton was lunched and since then it's been in most VAG products.
There are a ton of hidden and over engineered things within VAG products that, perhaps sadly, are never mentioned.
i.e. Your climate control system will go into re-circ mode when reversing or washing the windscreen to avoid fumes/washer fluid smell coming into the cabin.
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I have noticed the passenger wiper blade adjusts or moves slightly, for no reason at all...its random. Very odd. I have passengers notice it as well. It seems to move slightly, but the time you hear it or catch it move in your peripheral view - its back to the spot it stays in. So weird. Anyone else experience this? Its a 2021 992. Havent driven the car in rain yet so Im talking about a stationary wiper blade.
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FWIW, I don't believe this "feature" is designed to prevent the wiper blades from freezing to the windshield. The only time this movement occurs is with the ignition "On". So . . . . . First, bear in mind that any freezing of the wiper blades to the windshield will most likely occur sometime after the car is shut off in freezing ambient conditions and Second, flipping the wiper arm isn't any more likely to free (or damage) a wiper blade than simply turning the windshield wipers on. Even then, most of the damage that occurs to a wiper blade in winter conditions is when the driver insists on grinding all of the frozen ice from the entire path of the wiper blade. Now, some vehicles are equipped with small heating grids, similar to rear window defoggers, placed where the wiper blade parks. This feature would help to prevent wiper blade freeze depending on how the systems algorithm is designed. But such systems still do not help those drivers who do not scrape their windshield clear of ice before using the windshield wipers.
I suspect this "feature" is far more likely the result of either an indexing function of the wiper control system and/or an automatic test/diagnostic sequence.
I suspect this "feature" is far more likely the result of either an indexing function of the wiper control system and/or an automatic test/diagnostic sequence.
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FWIW, I don't believe this "feature" is designed to prevent the wiper blades from freezing to the windshield. The only time this movement occurs is with the ignition "On". So . . . . . First, bear in mind that any freezing of the wiper blades to the windshield will most likely occur sometime after the car is shut off in freezing ambient conditions and Second, flipping the wiper arm isn't any more likely to free (or damage) a wiper blade than simply turning the windshield wipers on. Even then, most of the damage that occurs to a wiper blade in winter conditions is when the driver insists on grinding all of the frozen ice from the entire path of the wiper blade. Now, some vehicles are equipped with small heating grids, similar to rear window defoggers, placed where the wiper blade parks. This feature would help to prevent wiper blade freeze depending on how the systems algorithm is designed. But such systems still do not help those drivers who do not scrape their windshield clear of ice before using the windshield wipers.
I suspect this "feature" is far more likely the result of either an indexing function of the wiper control system and/or an automatic test/diagnostic sequence.
I suspect this "feature" is far more likely the result of either an indexing function of the wiper control system and/or an automatic test/diagnostic sequence.
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Joined: Feb 2021
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My TTRS also does this, it is intended ( at least according to the manual ) to allow wiper blades to cause less drag by moving them back under the back edge of the hood. It only happens when the wipers are set to auto. They move out the to the primed portion to wipe ( and cause extra drag ) and then wipe the windshield when there's enough rain detected. If no rain detected within some predetermined time, they otherwise move back under the hood edge.
