To be fair Richard I have read ETMs / Owners Manuals / Rave / other stuff ad nauseum and they are (too often) contradictory !
Incidentally I am referring to the coil/fob combo which uses 'RFID' techniques for, I agree, immobilisation purposes as in:
(Range Rover familiarisation documentation)
Operation: Disabling passive immobiliser
"The BeCM receives a signal from the ignition key input switch as soon as an ignition key is inserted. In response that this signal the BeCM will provide a pulse output signal to the inductive wire coil fitted around the top of the ignition switch. This coil will in turn induce a pulsed voltage signal to a smaller wire coil incorporated within the ignition key assembly. Circuitry, also housed within the ignition key assembly automatically responds to the induced voltage signal detected by the smaller coil, by activating a remote lock signal. Providing the remote lock signal received is recognised by the BeCM as an authorised signal it will automatically remove the crank inhibition and re-mobilise the electronic engine immobilisation without there being a need for the driver to take any further action"
Ok, that is all in LR-speak but it seems to be saying that you (ok, Frank...) has to insert the key into the ignition (which is recognised via RFID), and then the fob sends the RF signal to the BeCM via the receiver etc etc to remove the "Disabled" condition (?).
My main question then is if the key is not first recognised via the RFID/coil system, will (just) pressing the fob button be the same ?
Or, and repeating this in another way, will the BeCM wake up (and also remove immobilsation) if the key is not actually in the ignition ?
You seem to be saying that once Frank's key is re-synched (via the door lock technique via a working receiver...) all will be fine; Lets hope so !
It is easy to get re-synchronisation and immobilisation confused in this mire....although LR's terminology is far too often truly awful of course.....
As is frequently the case: It is written by "those who know/understand" for those who don't.....and often still don't after reading it umpteen times !!
EDIT: Just had a thought; but it won't help much: If the coil/RFID technique is called "friendly re-synchronisation"
should the (universal) 'waggle the key in the door lock' etc method now be called "less friendly synchronisation" ?
Or perhaps even "aquaintance re-sychronisation" ?