Hi All
Apologies if this has already been covered, and my knowledge of cars is very very limited.....
I have inherited my parents Subaru 07 Impreza (estate). It has just the single key with one button Pic attached), which disabled the immobilier etc. However, that

stopped working, so had to use the keypad to do the business and start the car.
That then stopped working and doesnt stop the alarm, and switch off the immobiliser.

I had a mobile car electrical technician come to have a look, and he tested the keys, and they were transmitting fine - and they have new batteries fitted when the alarm wouldnt switch off.
He advised its most likely the Sigma M30 had gone wrong. I have managed to secure another one - complete with code, and that has been fitted. Before I get the guy to put all the wires back etc - my question is -

Do I need to do anything with the original keys? Do they need re-coding or anything? The guy was advising that the alarm was fitted after the car was built, rather than part of the car manufacturing assembly - and assuming the keypad is fine, do I need to re-progam that with the new code

I did ring the nearest Subaru garage for advice, but like so many other people I have seen on here, they never came back...!

Any help or guidance would be very welcome
Thanks very much indeed

 

If you had looked in the "Security" forum you would have found the answer many times over.......
Yes the keys need coding to the alarm ECU.
I've attached a copy of the M30 alarm users manual - all the info you need is included in it.

With the single button keys, they operate the alarm module which in turn operates the keyless entry system.

 

Thanks Don - much appreciated, and yes, should have had a proper look before posting

Reading the manual, and the instructions on page 14, plus an answer I found from you on another post...does that mean its something I should be able o do myself? I know both the code associated with the old unit, plus also the new one....

Sorry - my knowledge and understanding of cars, other than driving them, is next to zero....

 

Should be fine to do it yourself.
If you have the code for the existing unit I would try and "re-pair" the keys to it first as it may still be functional.

Below is a few observations from Sigma sam when he was around

When using the keypad always observe the following points:
- The PIN number should not be entered too quickly or too slowly - when a digit has been pressed the small LED built into the keypad will illuminate briefly as confirmation and only then should the next digit be entered. - If an incorrect digit is pressed or the delay between entering digits exceeds10 seconds, then the LED above the keypad will flash rapidly and the PIN attempt should be abborted and started again after 30 seconds.

- Due to the small size of the keypad some users may find a rubber tipped pencil easier to use. DO NOT use the sharp tip of a ball point pen etc, or press excessively hard on the keypad as this will only damage the membrane and cause a digit to remain pressed, causing a continual incorrect PIN.


- The keypad allows only THREE PIN attempts and then will "Lock Up" if an incorrect number is entered a third time. This is a security feature to prevent random PIN attempts disarming the system.