Hmm. That's interesting because my phase 1 works slightly differently.
Ordinarilly, the alarm will arm if it's armed with the bonnet closed. The alarm will sound if any doors are opened, including the bonnet. This is normal behaviour.
Here's the clever bit. If the alarm is armed while the bonnet open, the rest of the doors remain sensed, and the alarm will sound if one of them is opened, but it ignores the bonnet. This has been tested many times, for example if I'm charging the battery, or performing work on the engine and can't close the bonnet for whatever reason overnight.
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