PCF7943

[ninja123]

Can anyone precode this ic to virginise renault megane handsfree key cards?

If yes, I want to purchase some :)

ninja

[simaservis1108]

Tango/TM100

[malczykos]

You can`t precode this chip. No programmer can correct precode this chip becouse betwen 7943 and remote controller is synchronization.

in You need brand new HF card, I have some pcs. PM pls.

[ninja123]

I hear tango can do this but i dont have tango, so just looking to buy some pre coded chips, if there is any out there.

And it must be possible to precode this chip, or there would not be any new ones!!

ninja

[malczykos]

If you instal new chip and precode on Tango You can program card. But working only keyless start engine and enigine start after inset card to reader. Remote will not work and keyless lockin/unlicking will not work. TESTED!

[ninja123]

anyone else had working success with this key?

ninja

[Vladko]

7943 needs different programing before use.For now none tool offers this.

[vlado kljucar]

work with tango 100% tested, i made many of them , new pcf7943 and precode with tango, handsfree work, and car start normal on remote button work noirmal...

[albertros]

Hi,
wow this is like pulling daisey roots!

Can someone please do a dump of a precoded chip.


7943 needs different programing before use.For now none tool offers this.
It would be interesting to try clip

[coolsoda]

288575

Hitag for hands free may be of use

[simaservis1108]

Coolsoda info same as Tango...

[ninja123]

anyone have good supplier foe this pcf, i have some but cant read or write when soldered to old key.

ninja

[viw9419]

. . . . . .

[simaservis1108]

ninja123 you can try at utsource.net

It maybe a bit more expensive,but their chips are of good quality,I never had any problem with them.
They will need eeprom programming though...

[ninja123]

Read before soldering mate, but I assume you knew that.

erm, no, how can you read this without an ariel attached?

please explain mate, ninja

[viw9419]

. . . . . .

[ninja123]

ahh, tango!

Now i understand you, but, as i dont have tango, i dont want to unlock any 7943's, just want to buy some blank (or precoded for this key) and solder them to keycard and prog via RF.

Looks like I will have to buy a tango after all :(

ninja

[viw9419]

. . . . . .

[simaservis1108]

Ninja123,if I had enough earnings for Tango,I would've certanly bought one myself,but alas,as it is situation in my country bad,I had to go the way of other tools.
I got TM100,it does the job,but it is isn't 100% Tango,it will never be 100% Tango.
Tango is a great tool to work with.

[ninja123]

letter to santa then :)

ninja

[lidons]

Hello.
me you can spend the precodes of the pages to test effi put it manual?

I have another PCF need to give preload, would need the contents of the pages of this PCF7943,


thank you

[albertros]

Hi
[QUOTE=lidons;2430330]Hello.
me you can spend the precodes of the pages to test effi put it manual?

is post #10 not what you need?

[albertros]

Hi,
todays findings :-
Clio 3 diesel 55 plate 1 x handsfree good working card

Prepared used keycard pcf7943 with above dump for megane
Removed batteries from both cards and programmed. Replaced batteries.

oe card worked as before purfect.
used card central locking buttons - x work
handsfree - x work
insert card car start.

Read good card and copied all the data (except id) to bad card and nothing changed.
Programmed NORMAL none hands free megane card everything worked (except hands free)

So who can tell us why?
Do brand new hands free cards work ok.

[paul_12345]

all these pcf are not going to work for the remote as they all use the same type of risc processor that needs programming, without programming it will do nothing.

only the pcf7946/47 do not use this system and have 'hardwired' remote handling circuit that is the same throughout the pcf7946/47 remotes.

The only way any of thes will be made to work is either break the security on the pcf to read the program or reverse engineer the signal from the remote to workout what the code is doing with the remote data from the transponder side of the pcf chip, then create your own program that emulates this and write that in the pcf.

[simaservis1108]

Paul info is right...
I forgot to mention my cards are unlocked cards with UCH dumps...

[neno11]

Paul, I agree with you but who cares, I can see the same circle of people talk about precoding new pcf's again and again, but will not believe you. In real world we can see that Chinese succeeded to crack some of those chips but also no one sell this chips alone, but only as complete pcb or remote. Of course, you can buy just chip but it will be empty. Chinese probably payed a fortune for unlocking.

[ninja123]

ok, so tango CANT do this then, so why are members saying that it works? Are they forgetting to say that they have unlocked them using dump from same cars uch?

ninja

[simaservis1108]

Alright to clarify abit more.
PCF7946 and PCF7947 only require Remote + Transponder precoding.
All others require Eeprom + Remote + Transponder precoding.
Tango/TM100 successfully precodes Remote + Transponder data for PCF7943.

[ninja123]

but what about eeprom?

still a bit vague.

so if tango can do 2/3, does it work or not?

thanks for info, ninja

[paul_12345]

but what about eeprom?

still a bit vague.

so if tango can do 2/3, does it work or not?

thanks for info, ninja

can't seem to find the spec sheet now, but at best the 43 uses the same remote system as the 46/47 but has the risc to control the hands free part

[albertros]

Hi
latest findings
put card (pcf7943) that only starts car into slot.
Close doors, start engine press hold remote button next to hazard until car "beeps"
locking buttons now work, hands free x work - yet!

[viw9419]

. . . . . .

[TERMINATOR1000]

good evening everyone
I buy pcf7943at422 at UTSOURCE and at Aliexpress , no one is real , all fake , no IDE transponder !
An expert would have a supplier ?
thank you in advance .

[TERMINATOR1000]

HELLO ....... NO ONE TO HELP ME ?
i have a lot of PCB waiting soldering of pcf7943at422

[paul_12345]

HELLO ....... NO ONE TO HELP ME ?
i have a lot of PCB waiting soldering of pcf7943at422

if you want to pay 20e

http://www.codecard.lt/keys/-key-chip-/pcf7943-new-transponder-ic-for-bmw-remote-key-repair/prod_119.html

[TERMINATOR1000]

if you want to pay 20e

http://www.codecard.lt/keys/-key-chip-/pcf7943-new-transponder-ic-for-bmw-remote-key-repair/prod_119.html

Hello

it's for BMW !
do you test is on Megane 2 / Clio 3 keycards ?

thanks

[paul_12345]

its a pcf7943 just with bmw precode, just the same as a blank and would need megane precode using tango etc... and no I have not bothered to try to reuse these cards.

[TERMINATOR1000]

its a pcf7943 just with bmw precode, just the same as a blank and would need megane precode using tango etc... and no I have not bothered to try to reuse these cards.

It's not for hitag2 RCF compatibility ...
you say that pcf7943at422 are the same to an pcf7943at314 ?
Thanks

[Louislesinge]

Hi,
I got a Scénic with free hands system but no free hands card. I found used cards of this kind an would like to rebuilt them.
Could some tell me how is the problem with PCF7943 today? I mean is it possible to save used free hands Renault cards just changing and preparing the PCF 7943 or something will never be right, like starting free hands, remote lock/unlock ?
Regards,

[tomalamix]

Hy everyone!

I already have one Med Mk2 1.5 dci on my garage and I've decided to buy another one to retire the "old" on, but it only have 1 key, its a hands free version but I only 1 key. I've decided to clone my working keycard to another handsfree keycard but to do that I'll need your inputs, I think you guys are more aware of things than me, and since there are several keycards for sale like this on the usual chinese websites I'm convinced that there is some solution to use those.

So far I've managed to understand that i need to PRECODE the card with Zed-bull (or other tool - which I don't have - if there are others pls inform). To do that I'll need the PIN code for the car and only in the end, after PRECODING the card, the virgin card can be PROGRAMMED with the car. In the process I've to be very carefull because I'll be only able to do it once, the PCF7943 (inside the virgin card) only accepts one writing, no space for failures. So do you guys know some info on how to pull this off?

Right now this is not urgent but it can be, I've recovered two keycards in the past and posted on the web 10 years ago, never needed to read the contents of the PCF, just swapped the PCF from the broken card to the new one, and during this time I've never needed the 2nd card - thank God https://www.digital-kaos.co.uk/forums/image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 For this "new" car I want to have the 2nd card available, just in case.

Thanks everyone for the inputs

[vialli]

If the stress is not too great you can add a simple card without keyless function, will start the car with the card in the reader and for lock-unlock the doors you use the pad card
This is necessary for the new card the old one will work as before, with keyless

[tomalamix]

If the stress is not too great you can add a simple card without keyless function, will start the car with the card in the reader and for lock-unlock the doors you use the pad card
This is necessary for the new card the old one will work as before, with keyless

You mean program a keycard with the PCF7947 ? Ok, I'm open to that suggestion also. And what's the way to do it properly?

BR

[vialli]

Many programmers can do it, China programmers like FVDI 2014/2015/2018, Xtool PAD, OBDSTAR

[tomalamix]

Without needing to precode the card, right? Just pick on the new card and sync it with the car, the tool does the rest: finds the PIN number and is all straight forward. is that it? Sorry to ask, never coded this keycards.

[vialli]

All you need is a new card (China card is good), no need to precode, the tool does everything just follow the instructions
The first time it will delete all cards in the car's memeory, after that it is necessary to enter every card to be learned

[tomalamix]

But i don't want to loose the hands-free, at least on the card that it still has it. That procedure will not erase the hands-free function with the card that still has it?

And what about to sync another hands-free card, is that hard to do it?

[vialli]

Just what I said as the second is no keyless card and the old card will stil have the handsfree function
Handsfree card is expensive and difficult to find and bought

[tomalamix]

I have an handsfree card here, but is used. I've used it for some tests a few years ago and has been resting ever since, but is complete. It could be done?

[vialli]

If it was encrypted on another car don't bother because it won't work
Must be unlocked card

[tomalamix]

Yes, it was coded to another car.

Ok, so far so good, you've gave me a great push for code a 2nd card without the handsfree.

If i find one card with the PCF7943, which is the main topic of this thread, how could I do this task?

[paul_12345]

You can replace the pcf7943 with a new one if you can find a good supplier, then precode with tango amd program the card the same as the non hands free and it will work fine.

[tomalamix]

Hy Paul,

So, the real struggle here is to find a good supplier for the PCF7943, after that i can go for the programming. I was thinking about using the FNR4in1, aparently is simple to use:

http://blog.obdii365.com/2018/10/19/program-renault-megane-ii-chinese-key-card-with-fnr-key-prog/

Is the info described there still accurate?

At the time the person who wrote this didn't know that doing exactly the same thing with the PCF7943 would also activate the keyless-go on the card (if he had access to a virgin chip/card maybe he would know).

Thanks

[paul_12345]

I ordered some pcf7943 from aliexpress and about 1/3 worked about 2 usd a chip

[tomalamix]

Well, i can buy 2 or 3 from different sellers and check which one works. I have an old handsfree card here, i can take out that PCF and install one from aliexpress. What about the FNR4in1, it seems ok to you?

And installing a new PCF in the card I'll need to pre-code the card or the process is exactly the same?

[tomalamix]

Guys,

Im sorry but you've confused me. For the PCF7493, if i buy one new chip from aliexpress of whatever, solder it in the card and then code it with TANGO or Zed-bull it will do the same thing right? But those don't program the card for the car, afterwards ill have to use FNR4in1 or FVDI or other to program it with the car, right? Is that it? I've never done this cards so I need some guidance here. thanks

For the PCF7497 I've understood that its only the final part that matters, using the FNR4in1 or FVDI or other to program it with the car and that's it. The challenge here is to program the PCF7493 to work handsfree.

[vialli]

Yes, this is exactly what needs to be done depending on what you choose from the two options

[Ecuprog31]

I’ve tried pcf from ecuvonix
after I solder it and precode with tango no signal on rf

[Ecuprog31]

I didn’t try to program on the car
anyone have success with new chip ?
where to buy original or good chip?
thanks

[tomalamix]

I think there ins't a reliable place to buy those. From Aliexpress it's a lottery, and Im'm checking Ebay also and I see some sellers with some pretty solid feedback, maybe I'll aim for one of those. If you try also please report your experience.