Forgot to mention that there's an immobilizer on the alarm, so my car won't currently start. This is extremely frustrating. I removed the fuse for the horn so it stopped blasting my eardrums.
I found this post on Tundra solutions:
http://www.tundrasolutions.com/forum...vip-intrusion/
Seems to cover most of what I'm going through. Like this person, the LED on my Corolla does not show a "Toyota" or anything like that. I'm starting to think it's an aftermarket alarm since it doesn't respond to the steps laid out in the owner's manual. So any advice on removing the plastic dash under the steering column? I'm going to attempt that tonight to look for an alarm wiring box. Can I just unplug the wires?