My 2004 S2000 alarm, installed when the car was new by the dealer, won't turn off. It honks repeatedly. I can't deactivate it with the fob. The only way to get it to stop is by unhooking the battery.
I've tried:
1. Replacing the car battery
2. Replacing the fob battery
3. connecting the battery with the ignition turned on
4. starting the car
5. pressing and holding the fob arm and disarm for up to 5 seconds
6. pressing the fob arm and disarm several times

The alarm led on the dashboard flashes twice.

The car is undrivable. How can I fix this or disable the alarm?