Hi there,
Alarms triggering points are door, hood and trunk switches. If you have door ajar indicator flashing while driving, then one of the door could be out of alignment causing the door switch to have intermittent contact even though the door is closed.
If none of the door ajar lights are flashing, check the hood switch. Try unplugging it and test if alarms self triggers.
Workshop owner
Diploma in Automotive Engineering, 30 years working experience.
That should be the siren not the hood switch. I do not have a diagram to show you. Look along the front upper panel for a push buttnon type switch and that shold be the hood switch.