PCF7936 in Astra H?

[incognitus4]

Anybody has succeeded in programming a PCF7936 transponder to an Astra H?
I've already used up 2 chips, op-com says "programming failed" and the chip gets locked.

[Duracell2]

Anybody has succeeded in programming a PCF7936 transponder to an Astra H?
I've already used up 2 chips, op-com says "programming failed" and the chip gets locked.

I have Astra H and made a lot of testing.

This is not possible. (if you use regular PCF7936)
Also if programming has failed, the chip shouldn't be locked. Check if it is in chipper mode. You can reuse is for sure.
Although PCF7936 is from the family ID46, and can be theoretically used, this is not possible
beacuse Astra H expects 7941 chip which can be recognized on the number "6" on the 7th place (from left to right) in the chip ID.

Therefore the Chinese developed own version of PCF7936 chip , where chip ID can be programmatically changed.
They can then change the ID to what ever they want, and simulate any chip of the ID46 family.
In this way, the car is fooled, that it is 7941 chip, but it's only a 7936 chip.
Those chips, where ID can be changed, are used for cloning (CN900 mini etc...) and are more expensive then regular PCF7936.(where ID can't be changed)

Also please keep in mind, that the Opel antenna is week , and sometimes does not recognize the PCF7936.
You have to turn the ignition few times more, in order to start car. It's not that bad, but can by annoying.

Therefore I would not waste to much time trying to use PCF7936 with Astra H.

I hope this info helps you further.

[comizelu]

If i remember well you have to read the immo data from ecu and add pcf 7936 with tango or similar but can't program remote.
Never used pcf7936 for astra h.

Inviato dal mio HTC One utilizzando Tapatalk

[Duracell2]

If i remember well you have to read the immo data from ecu and add pcf 7936 with tango or similar but can't program remote.
Never used pcf7936 for astra h.

Inviato dal mio HTC One utilizzando Tapatalk

probably the car software does not allow registering PCF7936 via OBD.
But when's first there in the system (hacking), then it's fine.

[purdy]

Is Possible to clone to a copy chip not possible to program 7936 chip directly. There were available non remote circuit boards using a pcf7941 and coil with no RF remote circuit. These would go in.


Sent from my iPad using Tapatalk

[Duracell2]

Is Possible to clone to a copy chip not possible to program 7936 chip directly. There were available non remote circuit boards using a pcf7941 and coil with no RF remote circuit. These would go in.


Sent from my iPad using Tapatalk

I am glad, you agree with me.

[reks13]

No true, astra h not look for 7941 and 6 in ide. 7941 must be programmed for astra with special erom

[Duracell2]

No true, Astra h not look for 7941 and 6 in ide. 7941 must be programmed for astra with special erom

PCF7941 in deed need special firmware, but that was not the question. There are other topics discussing this.
The question was, how to register regular PCF7936 to Astra H via OBD key learning procedure.
And this is not possible, because Astra H looks for PCF7941 during key learning.
That's what I said, and explained how the the PCF7941 can be recognized.
If you write the key ID directly to immo (hacking), (bypassing the learning procedure) then it will work, but that's also already said above.
See all posts.
Best regards.