Re: Ford sedan ignition problem
I must admit I was thinking the same thing - that it should at least crank maybe.
That said my searching of the site, I came across a post with a vid link to how the whole Key fob transponder and Key reader thing work together with the engine computer.
The transponder inside the plastic key fob apparently has no power source of it's own, but has a wound copper coil, and the key reader section within the steering column has a wound copper coil ring - that when the key is inserted create4s a magnetic field around the transponder in the key fob with ts copper wound coil - the magnetic field of the key reader imparting a small electrical charge in the transponder in the keys wound copper coil...
Then the key reader within the steering column, can read the signal broadcast by the key transponder.
At least that's how the Video link showed it.
The key reader within the steering column - is connected to the cars computer.
If the key reader isn't perhaps creating the required magnetic field to activate the key, or the disconnecting of the key reader from the computer trips a tamper proofing computer code, then from what I understand the engine computer shuts down both the ignition & engine starter circuit, as well as the fuel supply / injectors.
This is to stop anyone "jumping" the starter motor terminals, and getting the engine to start.
I think it will be necessary to have the cars computer re flashed to re set the ignition tamper codes and re connect the key reader in the steering column and cars computer.
That's my understanding of it at the moment, - however I'd be very happy to be corrected if there's something / obvious simple that I have overlooked?.
The old "eliminate the simple thing first" mantra - its easy to get wound up in computers and codes etc and sometimes overlook the simplest of cures (Remember the TV Show "the IT crowd" - have you tried turning it off and on again?")
Well We've tried that... now we are stuck.