OK - the ETA is installed in the vehicle, along with a bunch of new induction hoses and connectors. The good news is that the vehicle now idles
However, bad news is that there is now an ASR light showing, and the car is in limp mode

The workshop says that, following the reset procedure above, the new ETA did nothing - no movement of the butterfly. Possibly connected to the ASR being triggered?
They wonder whether the new ETA is faulty. I hope not - I'm sure Beckman do good work and test units before they're shipped. Their next step is to disconnect the battery overnight and see what happens. If there's no change, they'll plug the original ETA back in to see if the problem resolves itself.
In the meanwhile, I said I'd consult the gurus here. What thoughts do folk have about A) most likely cause(s) of the problem and B) next steps to take to track down the problem?
Cheers,
Russell