Cruze Eco shutter info

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Thread: Cruze Eco shutter info

  1. #1
    Driver's Ed
    Join Date
    Jun 2011
    Near Lexington, Ky

    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
    Retired Moderator
    Join Date
    Mar 2011
    good info 1953, wish there was an indicator on dash that shows status of flaps

  4. #3
    BOOOOST! limited360's Avatar
    Join Date
    May 2011
    Detroit, MI
    Solid investigation... I like it!

  5. #4
    1st Gear
    Join Date
    Feb 2011
    Carrollton, Tx
    Yeah, what they said!

  6. #5
    2nd Gear Crewz's Avatar
    Join Date
    Jul 2011
    Houston, Texas
    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
    Join Date
    Mar 2011
    Hudsonville, MI
    The shutter isn't just open/close, it has 256 positions including full open and full close...

  8. #7
    World Rally Champion 70AARCUDA's Avatar
    Join Date
    Nov 2010
    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
    2004 Pontiac Vibe 1.8L/MFI 4A

    1971 Dodge Charger 318 3A
    1970 Plymouth AAR 'Cuda 340/6BBL 4M
    1968 Dodge Charger 383 3A
    1967 Plymouth Barracuda Formula-S 383 4M
    1965 Plymouth Barracuda Formula-S 273 4M

  9. #8
    FI Lunatic gman19's Avatar
    Join Date
    Apr 2011
    North Carolina
    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
    1996 Trans AM LT1/M6
    1998 Pontiac Sunfire (Gone - but not forgotten!)
    2010 Chevrolet Equinox LTZ

  10. #9
    2nd Gear WHITECO's Avatar
    Join Date
    Mar 2011
    Lethbridge Alberta
    Awesome report....thanks so much for the info!!

  11. #10
    Driver's Ed
    Join Date
    Jun 2011
    Near Lexington, Ky

    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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