what is the AUC sensor? - BMW M5 Forum and M6 Forums
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post #1 of 9 Old 7th July 2006, 10:22 AM Thread Starter
Ruppy
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what is the AUC sensor?

Hi guys.

On the air filter box, a AUC sensor. What is? What for?

Frank

///M5 3.8 1993, 345/328 big brake...gone but never forgotten
E30 327i turbo...gone but never forgotten
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post #2 of 9 Old 7th July 2006, 11:06 AM
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Quote:
Originally Posted by Ruppy
Hi guys.

On the air filter box, a AUC sensor. What is? What for?

Frank
Frank,

The AUC sensor under the airfilterbox is for the climate control to keep polution outside the car. It is only working when you have the circulation button on the climate control panel.

Serge
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post #3 of 9 Old 7th July 2006, 11:18 AM Thread Starter
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I have a standard clima.

3 button.

One for te compressor start, one for the circulation and the third is for windscreen heater.

whitout this AUC sensore the circulation is not working?

///M5 3.8 1993, 345/328 big brake...gone but never forgotten
E30 327i turbo...gone but never forgotten
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post #4 of 9 Old 7th July 2006, 02:12 PM
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Quote:
Originally Posted by Ruppy
I have a standard clima.

3 button.

One for te compressor start, one for the circulation and the third is for windscreen heater.

whitout this AUC sensore the circulation is not working?
When you have the button with the 2 circles and the A.
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post #5 of 9 Old 7th July 2006, 05:03 PM Thread Starter
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So my standard clima not use it.

Thx.

///M5 3.8 1993, 345/328 big brake...gone but never forgotten
E30 327i turbo...gone but never forgotten
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post #6 of 9 Old 7th July 2006, 06:44 PM
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Hmmm, if you have the AUC sensor, you should have AUC and thus the correct button. Cars without AUC got a normal "circulation" button with just that function. AUC cars got a "circulation" button with two LEDs: the first push triggers AUC and the second (2nd LED lit) activates circulation.

Kind regards,
Tobias

Last edited by Chewbacca; 7th July 2006 at 06:45 PM.
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post #7 of 9 Old 7th July 2006, 06:50 PM
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Don't mind me clearing this up: The three circular arrows on the button mean REcirculation, meaning the car will not allow outside air to come in. In cars without AUC (like mine) that means the driver closes it by pushing the button, wether it automaticaly disengeages I haven's found out. I think it should.....

AUC when active (LED on) will close the car for outside air when it detects smog or pollution, to open again when it thinks the air is clean enough OR the passenger compartement has had the same air for too long.


Quote:
Originally Posted by Chewbacca
Hmmm, if you have the AUC sensor, you should have AUC and thus the correct button. Cars without AUC got a normal "circulation" button with just that function. AUC cars got a "circulation" button with two LEDs: the first push triggers AUC and the second (2nd LED lit) activates circulation.
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post #8 of 9 Old 8th July 2006, 09:39 AM
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Quote:
Originally Posted by Stevie
Don't mind me clearing this up: The three circular arrows on the button mean REcirculation, meaning the car will not allow outside air to come in. In cars without AUC (like mine) that means the driver closes it by pushing the button, wether it automaticaly disengeages I haven's found out. I think it should.....

AUC when active (LED on) will close the car for outside air when it detects smog or pollution, to open again when it thinks the air is clean enough OR the passenger compartement has had the same air for too long.
The button ahs 3 functions :

LED's out :
normal function, fresh air

Left LED on:
automatic system when high polution is measured fresh air valve
close and only the air in the car circulates, when polution is
low valves open again.

Right LED on:
Fresh air valves are closed and only air in the car circulates.
It is not recommended to use this option for longer times
because it does'n't use fresh air anymore.
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post #9 of 9 Old 10th July 2006, 03:56 PM
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Quote:
Originally Posted by Stevie
Don't mind me clearing this up: The three circular arrows on the button mean REcirculation, meaning the car will not allow outside air to come in. In cars without AUC (like mine) that means the driver closes it by pushing the button, wether it automaticaly disengeages I haven's found out. I think it should.....
No problem. Thats what I wanted to say, the boundaries of my knowledge of the English language kept me from sayin it that way.

Kind regards,
Tobias
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