The HRV doesnt seem to have a hood light.
But I think the opening of the hood while car is armed causes the alarm to go off.
So the hood switch is 'electronically' connected.
My question is: Does leaving the hood up without the alarm set cause any battery drain?
On our Canadian HRV LX, there is definitely a hood latch sensor.
It's integrated into the hood latch, you can see the wires running to it.
With the hood up, the remote Fob will lock the doors but HRV will not beep.
Leaving the hood up with the alarm active or in-active will not cause the battery to drain.
I've had our HRV in various states in our garage when we 1st bought it.
You have several separate threads and posts on your HRV electrical and battery issues.
One of your posts mentions issues with your keyless start, another mentions a dead battery and you replaced your battery 7 months ago, another post mentions a possible parasitic battery drain.
Perhaps post up a summary of your HRV issues and actions taken so everyone can get a full picture of the problems.