Precode PCF7936 from one BSI to another BSI. Citroen Xsara.

[DaniXDX]

Hello.

I have 2 dumps from 2 BSIs, one are the original form the car (CAR 1), and the other dump are from other car (CAR 2)

The problem is that I only have the car key from the CAR 2, and the remote from the CAR 1.

I have tried to program the key with the corresponding PIN of each BSI, but it is only possible to program it with the BSI of CAR 2 , and not with the original (CAR 1). I guess because the transponder is not a virgin.

It´s posible precode the ID PCF7936 from the CAR 2 to the CAR 1 dump? Create a "hybrid" file ?

Thank you.

[dijo]

Usually this keys have transponder with remote part married
you cant separate transponder from remote...
So if you whant to have both function then you need a virgen key...

[lion0304]

PSA PCF7936 virgin no any precode needed, just program direct with pincode.

Key with remote programmed cannot use with another car sapared from BSI, ECU.

[kiszka]

..........

[DaniXDX]

After several attempts and tests I got a "hybrid" dump, VIN & PIN & CAR 1 car equipment (working AC, auto lights...), and CAR 2 transponder, not DTC's & IMMO working !.(with CAR 1 ECU).

Replace PIN in BSI dump dont work, error programming transponder (Does not read the key, I guess because isnt virgin):

BSI 1, PIN 1, KEY 2 --> ERROR
BSI 1, REPLACED PIN BSI 2, KEY 2 --> ERROR
BSI 2, PIN2, KEY 2 --> OK PROGRAMMING


I just need to solve the remote, but being connected to the transponder I think it's going to be impossible, or maybe one of those lines at the end of the dump is the remote. Who knows?
I attach the dump in case you want to investigate. (Pass PM)

[joze]

Mmmmm, and what about bsi2,pin1 and key 2 ?


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[RFRemotes]

Maybe there is a alternate way to find where is written code for remote. If your car2 transponder with pin 9SNF had a remote connected to it you can unlock it and see remote bytes then find them in car2 dump. Then you can see the offset of remote bytes in car1 dump which corresponds to your existing remote.
First try to unlock PCF7936 from car2 with ISK 6D200B82 8E6C and put here what contain pages 3,4,5,6 of transponder.

[Zmann]

Maybe there is a alternate way to find where is written code for remote. If your car2 transponder with pin 9SNF had a remote connected to it you can unlock it and see remote bytes then find them in car2 dump. Then you can see the offset of remote bytes in car1 dump which corresponds to your existing remote.
First try to unlock PCF7936 from car2 with ISK 6D200B82 8E6C and put here what contain pages 3,4,5,6 of transponder.

Finally you've found the encryption key ?

[RFRemotes]

It is made from PIN, yes.

[rolovalero]

Hello. Anybody can help me to calculate ISK from these dumps?