Watch how close FOB is to car...

[Farmer Fran]

For those with the active FOB, be careful of how close it is to the car when parked. I have noticed even slight movements of the FOB causes the car to wake up.


I was waiting for it to back out and drive away in to a black tractortrailer

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[GooberDH]

I had to turn welcome lighting off because I'd regularly activate with my fob in my pocket in my house and the car sitting in the driveway. Makes getting a Faraday box to keep your keys almost necessary.

 

[Alan Applegate]

I agree the FOB is a bit too sensitive even at a distance, yet I like the idea of being able to start the car from a fair distance away. These functions aren't directly related, but lose one and they other might go away as well.

 

[Starship Enterprise]

We keep all our fobs in a Faraday box in the hall. Cars don't wake up unless we open the box.

 

[Westphal]

Our key fobs are in the "mud room" right next to the garage, but they don't wake up the car until we walk into the garage. Maybe it's the metal fire-rated door or just enough distance.

 

[armyGT]

I think we need $10K more in gimmicks and screens added to the Mustang.
LOL!

 

[Frogdog1]

I think we need $10K more in gimmicks and screens added to the Mustang.
LOL!

Not to worry. It will come, either Ford or govt. mandated.

 

[glenng6]

Our key fobs are in the "mud room" right next to the garage, but they don't wake up the car until we walk into the garage. Maybe it's the metal fire-rated door or just enough distance.

I have the same fire rated door and I haven't noticed my car wake up unless I have the FOB when I enter the garage. So you may be right! Glenn

 

[When Pigs Fly]

My welcome lighting doesn't activate until I'm within 6-8 feet of my car. In the garage, parked outside, either fob - doesn't matter. I can't imagine both of my fob batteries are that weak. I just got the car less than 2 months ago, so I thought that was normal for Mustangs. Is this one of those YMMV issues?

 

[glenng6]

My welcome lighting doesn't activate until I'm within 6-8 feet of my car. In the garage, parked outside, either fob - doesn't matter. I can't imagine both of my fob batteries are that weak. I just got the car less than 2 months ago, so I thought that was normal for Mustangs. Is this one of those YMMV issues?

Six to eight feet is normal. Glenn

 

[Skye]

Fobs have both active and sleep states.

The fob can go active in two scenarios:

- The device is in motion

- The unit is receiving an 125kHz Low Frequency wake signal

The fob will sleep if unmoved and resting for about 40 seconds; this is to preserve the fob battery.

The car's door handles and trunk latch have an inductive coupler which is always on. The coupler is generating a magnetic field. When the fob comes within about 6 feet / 2 meters, the coupler senses the change in the field and transmits a 125kHz wake signal. If the fob receives it, the fob in-turn begins transmitting an Ultra-High Frequency (UHF) signal to the car and starts an authentication process.

Any modern car, I feel it's best to keep the fobs in a Faraday pouch. There are several attacks involving fobs, signals and sensors which can allow for entry or vehicle theft.

The attached has more detail on these topics.

Edit,

It's also a best practice to keep the fob away from any inductive-type systems (stoves, charging pads and wireless chargers). The signals emitted from these power-inducing devices is enough to damage the fob and the chip in the key.

 

[Paul's stable]

Our key fobs are in the "mud room" right next to the garage, but they don't wake up the car until we walk into the garage. Maybe it's the metal fire-rated door or just enough distance.

Mine it stops working as soon as I leave my garage and go into my laundry room. If I'm working on the car I just leave my keys on the dryer. Guess my garage is like a faraday cage.

 

[TVMADoc]

I had to turn welcome lighting off because I'd regularly activate with my fob in my pocket in my house and the car sitting in the driveway. Makes getting a Faraday box to keep your keys almost necessary.

Not a bad idea anyway. Thieves use sniffers to try to locate weak signals from your fob then amplify them to make the car think that the fob is closer/to clone the fob signals. You might avoid a stolen car if they can't sniff out your key fob.

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