2nd Transponders in new gen. VW Key

[GermanCarKey]

Hello, yesterday I opened a new gen vw key (7N5 837 202 H)

i damaged the transponder and now car doesn't start.


My idea was, that I program a new transponder and put it in the exiting key (remote is working).


My technical support says, that is not good, because then there are 2 transponder in the Key.


But I think its no problem because the original transponder is damaged.

What do you say? Can I do this?


Sorry for my bad English :D


Greetings

[autoTkey]

Yep, if transponder is damaged(broken) it should be no problem to add another one. No interference should occur.
Just in case - you can remove the broken parts or if not possible, then you can brake it a little more :D .

[GermanCarKey]

Yep, if transponder is damaged(broken) it should be no problem to add another one. No interference should occur.
Just in case - you can remove the broken parts or if not possible, then you can brake it a little more :D .


okay thank you very much!

Can I remove the Transponder? or will the remote not work after I did this?

[GermanCarKey]

Here a picture

566920

[autoTkey]

For the remote on the picture - it seems some condensers or resistors are missing. If you are able to recover them, I think car should be able to start again.

[triak88]

remove the coil and replace with new trensponder .

[jodge]

remove the coil and replace with new trensponder .





for what?
Two capacitors are missing, not related to the tp part at all.
Resolder the marked capacitor and the two pin where the capacitor are connected.

[swq123]

you lost somethinghttps://uploads.tapatalk-cdn.com/20181025/4cd4236967daef71019336793038aeea.jpg

Wysłane z mojego SM-G920F przy użyciu Tapatalka

[GermanCarKey]

for what?
Two capacitors are missing, not related to the tp part at all.
Resolder the marked capacitor and the two pin where the capacitor are connected.

for what exactly i should do this?

I want to understand that before i do this haha


thanks for your answers!

[lion0304]

for what exactly i should do this?

I want to understand that before i do this haha


thanks for your answers!


There are 2 missing capacitor. Try to replace these and will work.

Value you need searching for

[jodge]

you lost somethinghttps://uploads.tapatalk-cdn.com/20181025/4cd4236967daef71019336793038aeea.jpg

Wysłane z mojego SM-G920F przy użyciu Tapatalka

yeah i saw that but as i say those are not related with the transponder. It will working without it


for what exactly i should do this?

I want to understand that before i do this haha


thanks for your answers!

the black thing is a transponder coil. vertically. The small black rectangle is the transponder + remote but those are working separeted.
The transponder electronic need a coil + capacitor (resonant circuit) to power up the whole thing. Thats the reason why working the tp w/o battery.
if you problem with the TP check and resolder all visble components. Coil, capacitor, blask stuff.
So pls resolder the marked capacitor and the two black recatgle pin where it's connected.
I was more badly damaged my first vag pin house remote. 10min later it worked again

[GermanCarKey]

I cant resolder them because i cant find the lost things haha.

i think the easiest way is to programm a new transponder and glue it in.....


what do I have to consider?

i would say i programm the TP individually and then stick it inside...

so nothing can go wrong when programming with respect to the old transponder.




Thank you guys!

[TeL200]

Options

If that was only working key:
* Repair/replace damaged/missing components

* Remove cluster and code new key on bench

* Remove cluster and code new transponder on bench, (de-solder induction coil and place transponder in it's place)

If have another working key:
* Code new key by OBD

* Code new transponder by OBD, (de-solder induction coil and place transponder in it's place)

[GermanCarKey]

The iduction coil is the vertically black chip on the top, right? i thought its important for the remote too? so i cant de-solder it?

is it a problem if i programm the new transponder and glue it in, without de-solder anything?

I ask so much because i will learn this for the future, programm new key is too easy :D

[Daveskeys]

If program new key is easy...program new key. All the info you need is in the first few posts. It surprises me how readily professionals provide details to DIYers and the greater universe.

[p1et]

The iduction coil is the vertically black chip on the top, right? i thought its important for the remote too? so i cant de-solder it?

is it a problem if i programm the new transponder and glue it in, without de-solder anything?

I ask so much because i will learn this for the future, programm new key is too easy :D



Programming new key it's too easy for you but you don't even know for what is the coil on PCB? Cmon

[TeL200]

:applause:

[GermanCarKey]

The programming process is easy, I said. It's not easy to learn it all yourself. In Germany, there are only a few people who can do it all, I'm learning everything at the moment. You've got that behind you too, and know how complex the topic of key programming and immobilizer is.



thank you for your help!

[autoTkey]

Just program the new transponder already and be done with it. If you don't want to repair the original key, which sounds like the better option for me.
Remote part seems to be functionally separate and probably will be able to resync if necessary.

[GermanCarKey]

Hello, I programmed the new transponder. Car starts..
After I glue it in, Car says no key and don't start.

If I check the transponder with CN900mini it says no transponder found.

If I put it in without the original remote CN900 found transponder.


It is possible to remove the original transponder or will the remote not work then?

[autoTkey]

Didn't we discuss this already - just desolder it!

[EMCE159]

OMG, what is happening with this forum.

[TeL200]

Some people make the easiest task so difficult for themselves.:confused:

Sometimes it's easier to look for a tall building with an open window. :dontknow:

[GermanCarKey]

My english is not the best so i mistake resolder and desolder sorry.

My support from germany said me, that if i desolder the chip the remote will not work so i was scared to do this.

i did it and it work fine. thank you !