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Jul 22, 2016 | 11:24 PM

#9 (permalink)

onehundred80

Senior Member

Joined: Apr 2006

Posts: 25,432

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From: Ontario

Re: 2004 Crossfire NOT running

Quote:

Originally Posted by pizzaguy

I KNEW IT - there are two antennas. Remember, the 'halo' antenna is for RFID operation, it has to couple tightly to the chip in the key so as to not only 'talk' to it, but to power it up as well.

The transmitter in the fob for lock/unlock has it's own power source, so no tight coupling is needed. Also, MUCH greater range is required for the lock-unlock function, so an actual radiating antenna is used. (And after 34 years in the industry, the one thing I know, is radio.)

I think you miss my point. I think that with the key in the lock the system makes sure that the correct chip is in the fob before setting the lock/unlock codes.
It checks that the fob chip and key are the correct ones otherwise you could have a key that fits and it will lock/unlock but will not start the car.

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