EFS17-85 fins stuck closed

Any help would be appreciated. Apologies if this has been discussed before. I searched, but came up with nothing.
I took my dogs to the park today to get some action shots. Mounted to my T2i body, the auto focus started losing its mind. Would rapidly jump back and forth between focus points and not release the shutter. I tried turning it on and off a few times, and then switched to manual focus. It worked for a few shots then gave me an error, communication between the lens and body has failed. please clean lens contacts.
When I got home, I swabbed the gold contacts with isopropyl alcohol and a clean dust free cloth. I did the same to the body contacts. After a few minutes I remounted the lens. Now the aperture fins (correct terminology?) seem to be nearly closed and wont open up wither in manual or auto shooting modes. I mounted my EF85mm lens, and it works fine, so I'm assuming the body is OK. Thoughts?

I'd suspect a broken ribbon cable in the lens. Since it's no use to you as-is I'd send it to Canon for a repair quote. The fins are the aperture blades.

EF-S 17-85 is prone to these types of malfunctions .Please send it to Canon repairs for it requires replacement of parts . I also came across such a situation sometimes back with this lens.

Jai.