Issue with aftermarket keys
When I bought my car, it came with two pairs (or bundles if you prefer) of keys. One bundle was with the factory one, which has a crack and may brake anytime, and an aftermarket one, without the "immobilizer chip" (I don't know ANYTHING about this, that's how the previous owner explained it, that's why I am asking). And the second bundle was an aftermarket key with an "immobilizer chip" which I lost, so ot doesn't concern me anymore.
In order to start the car with the first bunch of keys, I have to put the aftermarket key in the ignition, and have the factory key with the immobilizer thing make contact with it. Else, if I try to start the car without the factory key making contact, the car will fire up for a second, then immidiately stop running and a key light will flash on the gauge cluster.
My question, now. I ordered an Ultralite key. How can I make it work with my car, without having the factory key always with me? I also want to buy a Pole Position key, but I was concerned about this issue. Enlighten me, please!
Issue with aftermarket keys
That's definitely the proximity switch. I was talking to the mechanic at work about it today. He has seen it in Mazda built Fords. He described a coil wrapping around the ignition barrel and energising the key. Evidently you should be able to see where they drilled the key and inserted a small pellet shape chip.
You can't bypass the switch as it sends a coded message to the CPU. The key, switch and CPU are a matching set.
The Temic immobilizers are built into the ecu and are very difficult to remove. To remove it the ecu requires a new board fitted to emulate the immobilizer. Croatian company Autodijagnostika can do it.