Right!

So signal is transmitted from engine rather than conducted along the metal key stem?

Edited by willm on 02/09/2017 at 21:13

Close,

there's a sensor ring around where the key goes in the lock/ignition switch,

And the chip in the fob does the rest.

Actually in a pinch I taped a broken fob to this ring and used a back street key cut from the original to turn the ignition,

Customer was in a hurry and it was still working quite some time later.

'course there was no working imobby and the only security was to remove the key.

Builders!

Always in a rush.