What Is This Alarm?

[AndyJ 1]

Can anyone tell me which car alarm this is, and if it is an immobiliser? I never thought it was until today when its stopped working and now the engine will turn over but the ecu is not firing the coil...

 

 

If it turns out to be an immobiliser, what wire(s) would it be intercepting? I cant find much info on pirahna alarms since they arent around any more...

[Anthony 1,003]

If the engine cranks over but doesn't fire, it's probably cutting the ignition and fuel pump circuits - check for 12v at the coil with the ignition switched on (ie key in position 2) and 12v at the fuel pump when cranking.