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2015 Active Grille Air Shutter not working, MIL light

12K views 8 replies 4 participants last post by  citysoundman  
#1 ·
My new to me 2015 Outback Premium 2.5i just threw code U0284, Lost Communication With Active Grille Air Shutter.
Front what I can see the air shutter is stuck open, with no debris or anything preventing it from closing.
I did a bunch of reading up on this, and figured if I could get a closer look maybe I'd see a problem with the 3-wire connector going to the actuator. So I removed the front bumper. What I did find was not pleasant, the front end must have had a minor impact. Some of the plastic is cracked and bent, and the air shutter assembly's frame is cracked in a couple of places where it's bolted on. I still don't know why the code just came on though.

Can anyone help troubleshooting, I have a DMM and I'd like to know how to check if the wiring to the actuator is OK, thinking it may be a bad actuator. If the wiring is OK then maybe I'll replace the entire assembly. The wires are black, white, and red w/ blue stripe.

I can see the 3-wire connector to the actuator is on the driver side of the assembly pic #2. But what is the 2-wire connector attached to the passenger side for? (pic #3) Is that a thermostat or something?

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Discussion starter · #3 ·
Thanks Walker! Great to see the wiring diagram! I just did look up how to check for voltage at the connector, and I'm getting about 12V DC at both white & red/blue. So I'm assuming the wiring is good, and the actuator module must be broken.

BTW I read that the shutters close when the car first warms up. Not sure though.

Do you think it's safe to say I should replace the assembly? Looks like I can find it online for about $115.

Also, I see the fuse as 25 in my manual. I tried a spare fuse in its place but no change.
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Discussion starter · #8 ·
Discussion starter · #9 ·
I bought the Dorman replacement part, it worked out great. After installing it, as soon as I reconnected the negative battery terminal the shutter motor went into action, opened then closed. MIL light is gone! It's a great feeling after a successful fix!