Hi

I recently had my ECU given a virgin instal and everything was going fine, I had a locksmith come out to pair two new keys to the car, he managed to do the immobiliser chips (or so I thought) but not the central locking (faulty radio chips in keys). I've replaced the radio bits with genuine parts and got them working.

But...

Whenever I use the spare key, it starts the car ok but the immobiliser light keeps flashing,

This got me puzzled so I've checked this out via VCDS and the Ross Tech forum and found that the nice locksmith did'nt program the chips but his machine defeated the immobiliser.

Needless to say I'm not happy as this has invalidated my insurance.

Is there a way to un-defeat the immobiliser and get it working again as it should?

Sounds like the ECU has been immo defeated

To test this, you can try starting the car with the instrument cluster removed.

 

immobilser has three components

 

ECU > Cluster > keys

 

What year is your roomster?

Hi

My car is a 2006 1.9tdi pd.

I've already checked the ecu with vcds, Uwe from Ross Tech explained how to do it. The result said the immobiliser is disabled. 

I only cottoned on to the immobiliser being disabled when I tried one of the spare keys and despite starting the car the immo light keeps flashing (it doesn't happen with the original key) 

I'm not sure what the locksmith did to the car, all I know is it will not accept the cluster pin when entered any more.