Cruze Eco shutter info
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Thread: Cruze Eco shutter info

  1. #1
    Driver's Ed
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    Cruze Eco shutter info

    I mounted a small switch to monitor the front shutter.
    1 It goes thru an open- close- open at startup.
    2 Shutter closes at 40mph and opens at 34mph.
    3 Shutter opens at cruise speed when a/c is running, it will stay open for
    2-3 minutes after turning a/c off, then close as usual.
    4 So far no other strange or unusual results.

    I wonder if it will close during cold startup and help engine warm up faster
    during winter months.

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  3. #2
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    good info 1953, wish there was an indicator on dash that shows status of flaps

  4. #3
    BOOOOST! limited360's Avatar
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    Solid investigation... I like it!

  5. #4
    1st Gear
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    Yeah, what they said!

  6. #5
    2nd Gear Crewz's Avatar
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    Good info. I'm sure the engineers didn't put any indicator there cause a majority have no interest in knowing what it's doing, much less even know its there. Kinda like the reason we have no boost gauge.
    Cruze LTZ RS Silver Ice Metallic, Black Leather interior, connectivity package, sunroof, pioneer premium sound system, 18" split star wheels




  7. #6
    Handbrake Released oolowrideoo's Avatar
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    The shutter isn't just open/close, it has 256 positions including full open and full close...


  8. #7
    Formula One Champion
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    Quote Originally Posted by oolowrideoo View Post
    The shutter isn't just open/close, it has 256 positions including full open and full close...
    ...that indicates that it's using a stepper-motor and not a simple 'bang-bang' OPEN/CLOSE solenoid.
    2011 Chevrolet Cruze LTZ 1.4LT 6A
    2009 Pontiac Vibe 1.8L/SFI 4A
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  9. #8
    FI Lunatic gman19's Avatar
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    It would be sweet to set up a "% open/closed" indicator. Not hard to do. I have digital proportional valves on my aquarium that have the outputs for such indicators...too bad my LTZ has no shutter system!

    OP....Very nice job, by the way!




    2012 Cruze LTZ/RS Crystal Red Tintcoat
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  10. #9
    2nd Gear WHITECO's Avatar
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    Awesome report....thanks so much for the info!!

  11. #10
    Driver's Ed
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    Arrow shutter update

    The shutter is controlled by what looks like the hvac type controllers. These move the doors and flaps to control air direction and temp. It has
    power and ground and a third wire that is hooked to the communication network so without a scan tool there is no way to tell what the controller is doing. It closes solid at 40mph and above, it will not open again until you drop below 34mph or a/c is turned on. There would not be much purpose in opening the shutter partially when a/c is requested, the turbulence is already occuring if it opens partially so you might as well open it full to get the best a/c airflow.
    I actually hooked up a 12v led to come on when it closes and then go off if it opens more than ~ 20%. It is in motion all the time as the speed changes above and below 40mph. The road I drive has many turns and I have to slow below 40 to navigate them so the little lite is on-off-on-off ect.
    As soon as I can get my software update for my scan tool I will see if there is a % of open or closed for the shutter. I have a feeling that it will just say open or closed.
    BTW I have not been able to tell if the fuel economy does improve with the shutter closed. I have a vacuum gauge that indicates engine load and the vacuum reading and mpg never changed as it closed at steady state highway driving. It may just be sales gimick . Sounds good but actual function is questionable?????

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