Fix or Clone Renault Scenic key card

[blueangel666]

Hi my friends !

Please help me .... I need my car ..
My only scenic card is broken and my car does not turn on (card not detected). Can I fix it ?
This is the photo of the card. the capacitor in red circle is broken ... does somebody know its value ?
can I replace the original pcf7943 in a second hand card ??

Thanks !!241575

[olmar]

Hi my friends !

Please help me .... I need my car ..
My only scenic card is broken and my car does not turn on (card not recognized). Can I fix it ?
This is the photo of the card. the capacitor in red circle is broken ... does somebody know its value ?
can I replace the original pcf7943 in a second hand card ??

Thanks !!241575

The card works without capacitor.
Solder component.

[blueangel666]

Thanks olmar, but with or without capacitor, key card in this moment doesn't work. If I find a second hand card, can I replace pcf7943 ?

[olmar]

Thanks olmar, but with or without capacitor, key card in this moment doesn't work. If I find a second hand card, can I replace pcf7943 ?
You can replace pcf7943.
Condenser is for remote

[biktel]

You need a card with keyles system If you want to replace pcf.


Sent from my iPhone using Tapatalk

[obdsystems]

pcf is the 'brain' of the card so can't replace it without re-programming.....

i would resolder all parts on card. If still doesn't work then it's fcuk -so call a decent local locksmith who should charge less than main-dealer.
(you have emergency blade right??!!)
- if in Wiltshire/Swindon/Bristol area then message me

Your'll have to actually spend some money mate !!

[blueangel666]

My idea is to go to a scrapyard to find a Scenic II with the same card and replace the pcf. Ok ! If pcf is the "brain", programmed for that car, the rest of the circuit is the same. Right ??
But, somebody know the value of that condenser ? Somebody can post a scheme ?

Thanks !

[paul_12345]

My idea is to go to a scrapyard to find a Scenic II with the same card and replace the pcf. Ok ! If pcf is the "brain", programmed for that car, the rest of the circuit is the same. Right ??
But, somebody know the value of that condenser ? Somebody can post a scheme ?

Thanks !

obdsystem thought you meant replace the pcf with a new one, not transplant to another card.

That component will not help as the battery is only for remote, so if immo does not work its something else. Just try to resolder all connections.

[P&D]

Hi if the car will not start
it can only be 3 things on the card

Top of the photo (card) chip with 20 legs re-solder them
Main chip in blue circle 16 legs re-solder them
In the other blue circle the coil re-solder top 2 points

If the card does not start the car now..

you have 2 choices replace the coil (black round thing) they are common for failing
or get another hands free card & take the pcf7943 off the damaged card in the photo & solder it onto
the replacement card

Then the card will work perfect

When opening the replacement card don't catch the coil with the knife (otherwise your back to square one)

Regards P&D

[blueangel666]

thanks m8 !! I'll post result ...
Nobody knows capacitor value ? :-)

[kleidaras]

Capacitor value is 1 μF

[blueangel666]

Thanks kleidaras

[neno11]

Pcf7943, by pin 7 and 10 is directly connected with antenna/coil. Resistance of good coil is up to 100 ohms. This you only need for car to start. So two things are possible, if you only need resoldering it's easy but new coil is problem, hard to find.
BOB01REN bobina per riparazione smart key Renault Megane/Scenic - www.carelettronica.com (http://www.carelettronica.com/bob01ren-bobina-riparazione-smart-renault-meganescenic-p-2055.html)
-price for coil is about 35 euro

[obdsystems]

i say your car's been off the road for sometime !!!
Off course the pcf could just be buggered - if it was my only key I'd just get a new n be done with it.

Still you could be lucky :)

[blueangel666]

I have continuity from pcf pin 7 to coil pin 1 and from pin 10 to pin 2. Have I desolder coil to test ohms ??

If I find a second hand card, is it enough to replace PCF or I MUST replace also chip in "hands free part" and chip in "central locking part" ?? (See picture above)

[paul_12345]

if you want someone to do it for you just pay someone to sort it

If you can remove / replace ic's just try it!!

Although you've already been told the immo part is separate and very simple circuit and immo does not need the battery to work!!

have you even tried to resolder the joints especially the pcf ???

[P&D]

I have continuity from pcf pin 7 to coil pin 1 and from pin 10 to pin 2. Have I desolder coil to test ohms ??

If I find a second hand card, is it enough to replace PCF or I MUST replace also chip in "hands free part" and chip in "central locking part" ?? (See picture above)
Just change the coil then try it on the car....to see if it starts

[blueangel666]

Coil is damaged !! There is the wire broken !!
So does everything depend on it ? (Lock/Unlock, start, hands free ecc.. ) ?

[P&D]

No the coil starts the car only

[paul_12345]

Coil is damaged !! There is the wire broken !!
So does everything depend on it ? (Lock/Unlock, start, hands free ecc.. ) ?

No the remote will be UHF and do not use the long coils

[blueangel666]

So, there is another problem ..

[ciprishor]

Anyone knows if it is possible to add a normal Megane card (pcf7947 without the hands free feature) to a hands free Grand Scenic? Or they are incompatible?

[doctore]

I think that the card has nothing to do with hands free , it is the same both

[lion0304]

Anyone knows if it is possible to add a normal Megane card (pcf7947 without the hands free feature) to a hands free Grand Scenic? Or they are incompatible?

No problem to add normal card to hand free car.
If you add hand free to car without hand free, you need config UCH to hand free function.

[paul_12345]

No problem to add normal card to hand free car.
If you add hand free to car without hand free, you need config UCH to hand free function.

??? you can't add a hands free card to a normal non-hands free car its not got the modules on the door etc.

A non-hands free card will program in a hands free car fine.

Also Megane and Scenic are the same card and are interchangeable

[ciprishor]

Thanks for your answers.

@doctore: yes the card itself has to do with hands free function. It has a module with 2 coils that communicate with the car and sends transponder data. So you do not have to put the card in the reader. It has to be arround the car.

See picture:

http://s23.postimg.org/7ki3edb3v/61_A2_E098_237_F_44_EA_A097_06_F4_E002_D5_E9.jpg

[doctore]

i see and i think he could make start the car unlocks and locks buttons when it is not Handsfree card ,on to a hands free Grand Scenic

[lion0304]

??? you can't add a hands free card to a normal non-hands free car its not got the modules on the door etc.

A non-hands free card will program in a hands free car fine.

Also Megane and Scenic are the same card and are interchangeable

Yes you are RIGHT, i made mistake, for function hand free on car without.

Card will start the car but hand free not work because there are no specific antenna in car.

Also if hand free car, and hand free card not work, so need config UCH go back to hand free.

Sorry again for the confuse.

[lion0304]

Thanks for your answers.

@doctore: yes the card itself has to do with hands free function. It has a module with 2 coils that communicate with the car and sends transponder data. So you do not have to put the card in the reader. It has to be arround the car.

See picture:

http://s23.postimg.org/7ki3edb3v/61_A2_E098_237_F_44_EA_A097_06_F4_E002_D5_E9.jpg

This one is Hand free card, card in pocket and start without insert in reader

[gokart]

??? you can't add a hands free card to a normal non-hands free car its not got the modules on the door etc.


No. Hands free card works on non-hands free car perfectly as a normal card. Of course the hands free function won't work because of the missing modules.

[paul_12345]

No. Hands free card works on non-hands free car perfectly as a normal card. Of course the hands free function won't work because of the missing modules.

The whole point of having a hand-free card is that its hands free - if the hands free does not work then its not programmed in.

Kind of like someone asking if you can program a remote key on some other entry level car with no remote system and you saying yes getting the money then saying of course the remote dont work because the car hasn't got the remote receiver module.

[shadow12]

I think that's what he already wrote (A non-hands free card will program in a hands free car fine.)

[gokart]

The whole point of having a hand-free card is that its hands free - if the hands free does not work then its not programmed in.

Kind of like someone asking if you can program a remote key on some other entry level car with no remote system and you saying yes getting the money then saying of course the remote dont work because the car hasn't got the remote receiver module.

I can't agree with you because you are talking about more aspects. It is possible to program it and works fine except the hands free function. We are talking about the technical details here. The economic and customer related communications are another thing. Of course it isn't worth to pay extra money for a hands free card for a non-hands free car. If something is technically possible then we need to say yes - it is possible then everybody can make heir own decision.

[paul_12345]

I can't agree with you because you are talking about more aspects. It is possible to program it and works fine except the hands free function. We are talking about the technical details here. The economic and customer related communications are another thing. Of course it isn't worth to pay extra money for a hands free card for a non-hands free car. If something is technically possible then we need to say yes - it is possible then everybody can make heir own decision.

yes but read the post I was replying to...

[ciprishor]

I see a scenario where you can program a hands free card on a car without hands free.

Let's suppose the only card you have is a second hand card with hands free and you renew it and program it on the non hands free car.

In other scenarios either the customer will pay for a feature that cannot use or the supplier lowers profit to make customer happy (he gets the hands free card that cannot use as a hands free card at the price of non hands free card).

Hopefully now everyone is happy.

Later edit: I was able to successfully program a non-hands free card on a Grand Scenic that already had one hands free card. I used FNR 4-in-1.

Thanks for the info!