Mine is early 2002 with the two buttons fob. Anyway, thanks for the moment!It depends whether your 45 has a 5AS alarm or a Pektron alarm. They changed about the end of 2002 so it could be either.
5AS:- You don't need to know anything about the car. If you can open the door, switch on the ignition, and connect pscan, then it will tell you the EKA.
Pektron:- You need to be able to disarm the Pektron alarm before pscan can connect to it. If you have a working fob then this isn't a problem.