I am hoping that someone will be able to assist me or have some knowledge around whether or not I can change the CEM from another Aston Vantage S straight into my Vantage S which has a damaged fuse box.

1. If I do an exchange, does the replacement CEM need to be re-programmed?
2. I have found a second hand one online which is from a Vantage S V12 - it has the same part number printed on it as mine, will it work?

 

I would not do it, you need a new one and programming as it is VIN specific. And recorded mileage is stored in the unit as well as key programming to vehicle. Basic functions would work but you are risking having mileage change and no key fob use. Whenever it needs scanned for codes it will error and claim VIN mismatch which would indicate hacked repair/salvaged vehicle etc. Replacement from a dealer is probably less than $2k

 

.. or you can take second hand CEM and connect to your car w/o starting the engine, so your mileage will be copied from DIM to CEM when you switch on the ignition. Then you need to reflash CEM (using dealer's tool) with your VIN before you start the car. There is also possible to copy your CEM content to fully functioning CEM if you want to keep your keys and do not have the seed codes attached, however this can be done by experienced programmers. Your donor CEM must have the same hardware number (see the picture).

 

Hello fellows,

Just joined this chat and found this thread of significant interest to me.

To make a short story long, I purchased 2 2009, crystal key Aston Martin DB9's, one is a heavy rear end smash and the other a submarine.

I have transferred all electronics from "kick in the butt" to Captain Nemo.

With the rear-end damaged car, I was able to turn the engine over but It would not start. The submarine had systems working like windows and roof, trunk release, etc... but it would not turn over.

My present situation is that with all electronics gone form rear-end damaged car onto submarine, I get all systems working except it doesn't turn over. I get the red light on the shroud around the key, signal that ignition is engaged but nothing happens.

After discussing with a key expert over in England, he seems to think the issue is with the CEM in interface with the DIM.

I have both CEM's and DIM's twice with 3 keys, 2 crystal one valet.

The one crystal key coming from the damaged car is the one giving me the red light signal upon trying to start the engine. I am not getting that with the two keys from the submarine car.

So I am throughly baffled with what to do to get the engine to turn-over and eventually start.

I do have both matching CEM numbers: 31254903 like the one you show in the thread.

One more thing, the damaged car has 29 000 miles and the flooded car only 16 000 miles.

My British contact told me of a risk of ending up with 45 000 miles if the process is not done properly.

Can anyone help me sort this out?

A step by step process would help me a lot!

Thanks in advance,

Francis in Switzerland

Donner car, serious rear end damage

The submarine car. This one is to be resurected.

 

Francis - most interesting! Alas I cannot help with the question but I will be following your progress with interest. At some point why don't you start a new thread and chronicle your experiences for the rest of us! Good luck!

 

Ram_g,

Thanks for your reply.

I will start a new tread and try to make a story of it!

Francis

 

If the red light is flashing with the keys that aren't starting it, it could be an immobilizer issue. The keys aren't paired?