17 votes

Is there a reason keyless ignition cars do not shut off when it can no longer detect the keyfob?

I looked into this, and it turns out that almost all aspects of starting or turning off a car are governed by a federal requirements document called FMVSS 114. Things that are in there: Steering ...
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14 votes
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Is there a reason keyless ignition cars do not shut off when it can no longer detect the keyfob?

As JPhi1618 mentioned, this functionality centers around CFR 571.114, AKA FMVSS 114. Specifically section 5.2.1 which states: Except as specified in S5.2.3, the starting system required by S5.1 ...
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8 votes

Is there a reason keyless ignition cars do not shut off when it can no longer detect the keyfob?

There may be other reasons but without a doubt a big part of it is because it's impossible to predict under what conditions the car no longer detects the key. And as stated in some of the comments, ...
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  • 9,286
5 votes

Where is the part of the car that senses the i-key?

Your BCM receives the signal Nissan uses what is called a BCM or body control module. The BCM on your car controls the following Security (key fob synchronization, door locks) Turn signals Wipers ...
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  • 32.8k
5 votes

Where is the part of the car that senses the i-key?

For the remote entry receiver see number 11 in the diagram below. The interior key antenna is located under the center console number 13 and inputs to the body control module seen in number 1 of the ...
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5 votes
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What is the funny looking thing attached to my new mazda3 key fob?

That is a dealer ID tag. The salesman and managers use it to check keys in and out. They should have taken it off of the key before they handed it to you. If you don't want it, just take it off and ...
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5 votes
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Volvo V60 key needs new battery, will it 'forget' the car?

In most cars it's not the key remembering the car, but the car remembering the key. Your Volvo should be no different. Reading through your owners manual, it gives no warnings about taking this to the ...
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5 votes

Does the Toyota Prius stop if driven off without the key inside?

Not a specific answer for a Toyota Prius, but: This summer, we had an incident here in Germany, where the motor stopped after throwing the key out of the window. There's an online police report, so ...
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5 votes
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Does the Toyota Prius stop if driven off without the key inside?

No, it will not stop mid-ride. It will warn you the key is no longer in the car, but as long as you don't turn it off, it will keep running until you run out of gas or the car battery dies. It would ...
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  • 603
5 votes

Does the Toyota Prius stop if driven off without the key inside?

Your concern is valid. This article gives a good description of the weakness of smart keys. A man in the middle attack can fool the car to think that the key is inside allowing it to start. Once the ...
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  • 15.9k
5 votes

what happens when you hit engine button on a keyless ignition?

I rented a ford mustang, while reaching to adjust the a/c controls while driving on the interstate my finger accidentally hit the stop start button and at 70 mph the engine immediately shut down. The ...
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3 votes

volvo s40 2005 model, remote unresponsive

There are two things I can think of. First, the car might have lost the remote. Meaning that it no longer recognizes that the remote and must relearn it (through programming or whatever). Second, it ...
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3 votes

On what frequency range do keyless entry fobs transmit?

Automotive keyless entry systems typically operate at either 315MHz or 433MHz. If you use an RTL-SDR you can pickup the signals. There are also aftermarket antennas specifically tuned to pickup these ...
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3 votes

my car's keyless remote fob only works when outside of the pcb housing

If that happened to me, I would double check the battery for voltage when pressing the FOB buttons, and I would also check the battery contacts for possible corrosion. It sounds like the plastic FOB ...
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  • 2,095
2 votes

Two Mercedes Electronic Keys - One Works As a Remote - One Works to Start The Car - How Can These Be Combined?

The only way to do this is to have the keys programmed to the car. The only way to do that is to take it to the dealership. They have the necessary tools which are proprietary. Only they have them. ...
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2 votes

Remote Key Fob working only inside the car (close to receiver)

This sounds very much like a 'dry' solder joint on the battery connector. If you're a dab hand with a soldering iron, go to and re-solder the battery contacts. If not, go see your local watchmaker or ...
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  • 551
2 votes

Does the Toyota Prius stop if driven off without the key inside?

It just happened with our company-owned 2011 Prius. We had two drivers (one a trainee) in the vehicle, when a long-distance job came in. The second driver got dropped off at the office, while the ...
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2 votes
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Sporadic keyless entry (2013 Altima)

It seems obvious you are having some frequency interference. According to the Auto Service Professional website's article on Interference for keyless entry, "Some aftermarket devices can cause ...
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  • 9,035
2 votes
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Why don’t my non-driver door locks unlock?

Sounds like we can assume the problem as follows: The unlock signal, whether it comes from the fob or the door switch, is failing to complete the circuit somewhere between the unlock module, and the ...
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2 votes
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keyless entry, when keys are inside car

My "fleet" consists of a pair of 2013 Rav4EVs with keyless "ignition" that also has the touch sensor on the door handles. When my wife arrived this evening, I had her lock the doors with the vehicle ...
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  • 3,592
2 votes

Stranger's remote has the ability to unlock my car

Its not possible to reprogram the keyless code on your key but it IS possible with a mb tool to have all the keys disabled except the key your using or if you really wanted you could get a new unused ...
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  • 3,205
2 votes

If my Infinity/Nissan car key fob can unlock and lock the door but not start ignition

The prox, keyless entry and transponder on button are all different circuits inside the key. So you cant fully rule out the key just yet. It could still be half damaged. The first thing I would do ...
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  • 3,205
1 vote

Cant get my Camry to accept the new FOB

This is what I found for your 06 Camry, I assume you should use the Add Mode. More detail on modes below After B step 5 see image 1 below After B step 7 see image 2 below After C step 2 see image ...
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  • 7,950
1 vote

Keyless Entry System Nissan Versa Sedan 2014

First off, you don't specify if your vehicle currently has power locks or not. If it does, you don't need a kit like you listed. Something equivalent to the Viper 211HV would be enough. Since you ...
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1 vote

How can I deprogram the key fob of my Explorer?

Go through the same motions to program it for the 2001 as you did the 2006, but don't use it to program it. It's the vehicle which is actually programmed, not the fob. Once you go through the ...
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1 vote

Is the problem with individual locks or the remote entry locking system?

While multiple lock actuator failures aren't unheard of, I'd suggest checking the wiring to the door switches first. Especially the portion that goes from the cabin to the door. Also older central ...
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  • 10.7k
1 vote

Is there a reason keyless ignition cars do not shut off when it can no longer detect the keyfob?

It is pure and simple a safety thing. The American law given above doesn't spell it out explicitly, but that is the goal of the given regulations - prevent accidental shutoffs while the vehicle is in ...
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  • 201
1 vote

Ford Focus MK3 disable key free entry

Since the key-less entry system operates via wireless signals without physical contact to the ignition system.... You may be able to use tinfoil to cover the key so that the signal that the key puts ...
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  • 440
1 vote

Can I install a beeping transponder in my Toyota corolla

If your car did not come with a keyless entry system whatsoever (as in no fob or buttons) you can purchase an aftermarket keyless entry system to install in your car. If you have power locks it will ...
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  • 599
1 vote

Remote Key Fob working only inside the car (close to receiver)

Just solved my problem with weak key fob range… As seen on another forum, that was my FM transmitter/received used to listen to my iPhone on an FM frequency… That was that transmitter/receiver that ...
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