Reprogramming Audi A3 Key

[dirtychinchilla]

Ok so how do I know if it's actually doing its job then?

 

[paradigm]

Ok so how do I know if it's actually doing its job then?

Can you start the car? If yes, then the key has the right transponder. If no, then the transponder is knackered.

Are you getting a little orange light with a key symbol on the dashboard? Does it come on breifly when you turn on the ignition, and then go out again? If so, its fine.

 

[dirtychinchilla]

If the car recognises the transponder in the key, they key might physically turn the ignition but that's only half the story, it also has to recognise the transponder in the key.

Can you start the car? If yes, then the key has the right transponder. If no, then the transponder is knackered.

Are you getting a little orange light with a key symbol on the dashboard? Does it come on breifly when you turn on the ignition, and then go out again? If so, its fine.

I see, but firestar's post has confused me...I'll look for that symbol tomorrow.

 

[paradigm]

He is just trying to explain that nothing physically stops the key turning, or even turning on the electical systems. But without a working transponder that the immobilizer can sense, the car will never start, as there won't be power going to the ignition coils.

 

[Firestar_3x]

The key has three parts, the physical key, the immobiliser transponder and the remote central locking circuit board.

The key part will allow you to manually unlock the car and turn the ignition, but with the key alone you can't start the car.

The remote central locking circuit board allows you remotely unlock the car, nothing more, this is what you've programmed.

Neither of the above alone will allow you to start the car.

To start the car you need both the physical key and immobiliser transponder, the transponder deactivates the cars immobiliser, this can only be programmed by the dealer.

If you stick the key in the ignition and try and start the car and it starts, this means both the key and transponder are working.

If you can't start the car with the key this means the dealer needs to program the transponder, you can tell if this is the case because the car won't start and the key icon will be in the dash.

 

[Firestar_3x]

Dp

 

[dirtychinchilla]

He is just trying to explain that nothing physically stops the key turning, or even turning on the electical systems. But without a working transponder that the immobilizer can sense, the car will never start, as there won't be power going to the ignition coils.

I get it now.

The key has three parts, the physical key, the immobiliser transponder and the remote central locking circuit board.

The key part will allow you to manually unlock the car and turn the ignition, but with the key alone you can't start the car.

The remote central locking circuit board allows you remotely unlock the car, nothing more, this is what you've programmed.

Neither of the above alone will allow you to start the car.

To start the car you need both the physical key and immobiliser transponder, the transponder deactivates the cars immobiliser, this can only be programmed by the dealer.

If you stick the key in the ignition and try and start the car and it starts, this means both the key and transponder are working.

If you can't start the car with the key this means the dealer needs to program the transponder, you can tell if this is the case because the car won't start and the key icon will be in the dash.

Ok I've got it all now Thanks a lot! That penultimate paragraph explains everything haha.

Apologies for my stupidity, now I've just got to get them programmed correctly using that guide