Hello I'm Scott,
I'm not sure what you tried, but I'm sure this is very frustrating. I came up with this procedure that sounds different then what you tried. Keep me posted some I can opt out if it doesn't work. Thank you for using JA.
Open your Camry's door and sit in the driver's seat.
Locate the kill switch, actually a toggle switch, on your Camry. It is located on the left-hand side of the steering wheel column beneath the dashboard. It will be the only switch on that side beneath the dashboard.
Press the toggle switch in and hold it.
Start the engine on your Camry while you are still depressing this switch.
Listen for an audible beep that will let you know the alarm has been disabled.
Reverse this process to reactivate your alarm.
When do I reconnect the battery?
Thanx, Scott! We finally got the alarm to reset using your directions.
You are very welcome, thank you again for using JA.