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Since the passive entry sequence relies on the FOBIK battery to amplify the RFID signal, I wonder what would happen if you simply removed the battery from the FOBIK.

 

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Can anyone explain how the car "knows" if the fob is inside the car or not? The car won't lock if a key fob is in the cabin

Directional antennae.

 

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According to Wikipedia "The smart key determines if it is inside or outside of the vehicle by measuring the strength of the LF (Low Frequency) fields. In order to start the vehicle, the key must be inside the vehicle."[/QUOTE]
Not sure which vehicle they're referring to but in chrysler vehicles, the FOBIK does not determine location. The RFH (radio frequency hub) determines FOBIK location using signals from directional antennae.

 

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This is worthy of 60 minutes or an exposure cover up on tv. Make it happen, make it almost impossible to happen, show the costs tiny to the size of the auto behemouths in terms of parts or changes to the original fobik, not changing anything in the car, and then the date of the transfer and publication of the original papers. All on film, to the public. Then see what happens next. (Oh and loop in about a bazillion government agencies, standards bodies, regulating entities that all KNOW what really went down.)

Gotta link to all this great info?

 

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my solution for now: disable passive.. keep nothing of value in the car. also: video cameras

video cameras could be considered valuable.