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YOUR RESEARCHKey fob - circuit board programming question
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Use tiny piece of wire and copper tape
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Suggestion · Original poster
I've been using a tiny piece of wire and copper tape to complete the power circuit but want to sort it out properly.
Leading evidence: 'Use tiny piece of wire and copper tape' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use tiny piece of wire and copper tape' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Dilemma is....
My key fob has been rigged for a while (but working) and has now finally given up the ghost.
The little prongs that hold the battery in place have worn out and broken off. I've been using a tiny piece of wire and copper tape to complete the power circuit but want to sort it out properly.
Multipart question 1:
Can I just swap circuit boards, leave the original "pill", and have it work? Or do I need to pull out my PIWIS and code the circuit board?
I do have all of the porsche provided IPAS codes for my car, can I use them to program a circuit board from a used key?
Do I absolutely need the codes on the white tag to program any key, new or old?
Question 2:
I have 2 button keys; wonder if I can buy a 3 button key and program the third button to open the engine lid?? Just a thought. 2004 C4S with the electric acuators for the frunk and decklid.
Any solid input is much appreciated.
Cheers.
A new circuit board will need to be coded into the immobilizer for the remote unlock to work, requiring the IPAS code and the white tag code from the fob. If you don't do this programming step, the swapped pill is still able to start the car.
The white tag head codes are mandatory for coding the remote unlock. If you purchase a used keyhead without these, you're pretty much out of luck. If you have an existing keyfob the code can be recovered by dumping the immobilizer's memory, but this is a nontrivial activity (requires removing hardware components).
https://github.com/bdm310/996-Immobilizer
ok, thanks. So it sounds like a new key with a tag is really the only way to go.
Can a 3 button key be used, with the spare button opening the engine cover?
No idea, I've got a 1 button 2000, with a 2 button remote it does detect the second button press but isn't wired up to actuate anything. Would similarly expect a 3 button fob to be able to detect all 3 transmissions, but if the immobilizer doesn't have the connections to actuate anything then I don't think it would work. If opening the engine bay via fob worked for any 996 model then maybe this is something supported, but I've not looked into it myself.
This is a source reference. Confirm exact model applicability in the original material.
