Car remote jamming

car remotes dont work in my complex at all during winter,

its rather weird, summer everything is 100%
 
Jola said:
I tested this on a BMW and a SAAB, it worked 100%
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Probably an old BMW?

Tried 8 cars : two BMWs (E46 and E90), Volvo C30, Toyota Avanza, Toyota Fortuna, Focus ST, Peugeot 206 and a Chev Cruise.

It blocked 5 100% : both Toyotas, the ST, the E46 BMW and the Chev Cruise.

The Peugeot worked sometimes - and other times not. Quite intermittent :/

The Volvo and the E90 BMW were unaffected.
 
HavocXphere said:
Apparently Mercs are particularly popular for this tactic because they don't make a noise.
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Yes and no. Mercs usually don't chirp when locking or unlocking, so you'd not realise if you weren't looking. But mercs also have a dual system, where there is a radio signal and an infrared signal. If the radio signal doesn't work (most often because the battery is going flat), point the key at the driver's door handle, and it'll lock and unlock using the infrared.

So if someone is jamming radio signals, and you notice it, you'll still be able to lock and unlock your merc, as long as you're close enough and point the key at the receiver.
 
Apparently the locking sound and flashing lights are not reliable indicators that your car has been locked. ALWAYS TEST THE DOOR BY TRYING THE HANDLE.

Sometimes apparently the car will flash or beep like normal, but has not actually been locked physically.
Fortunately our car's "remote" locking works not by pressing the remote, but by pressing a locking button on the door handle itself. That way we just press the lock button, hand is on the handle already, so just test by trying to open. Remote stays in your pocket or bag.

Proximity Remotes FTW!
 
Someone tried this on me at our local spar in blairgowrie yesterday. First click didn't lock the car at all. So I tried again until it locked. And my remote generally works from 30m away from the car...
Fortunately the central locking makes an audible noise as well as the alarm bleep, so if I hear that I know I'm good.

Car "guards" were hanging around as well.
 
If you activate two remotes at the same time sharing the same frequency (in SA it is 433MHz) the signal from the one will overwhelm the signal from the other. 99% remotes today are rolling code devices and this includes the ET standard encryption and high encryption models. The receiver has to decode the digital word that is being transmitted and unlock (or relock) the car, or operate the gate motor or garage door.

You can

1) Extend your arm and press the button this way (your body acts as an aerial by induction)
2) Check that you receive confirmation by means of a siren chirp or flashing light that the signal you sent has been received and processed
 
chrisc4290 said:
If you activate two remotes at the same time sharing the same frequency (in SA it is 433MHz) the signal from the one will overwhelm the signal from the other. 99% remotes today are rolling code devices and this includes the ET standard encryption and high encryption models. The receiver has to decode the digital word that is being transmitted and unlock (or relock) the car, or operate the gate motor or garage door.

You can

1) Extend your arm and press the button this way (your body acts as an aerial by induction)
2) Check that you receive confirmation by means of a siren chirp or flashing light that the signal you sent has been received and processed
Click to expand...
Hold the key to your chin and press button. This increases the range. Tried and tested...
 
Happened to my uncle with his 750i. I would have thought a high end car like that would have some features built in to avoid this type of incident.

Sent from my GT-I9000 using Tapatalk
 
mike156 said:
Happened to my uncle with his 750i. I would have thought a high end car like that would have some features built in to avoid this type of incident
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What model?

It also seems as if not every remote works ... either the cheaper ones just aren't strong enough or the signal is slightly off
 
Not sure, it was bought new in march this year so possibly a 2011? It happened to him in the gateway shopping mall undercover parking, got his laptop and some loose change but left the car alone.

Sent from my GT-I9000 using Tapatalk
 
Wow.

Am E90 BMW 3 Series (2005 onwards) wouldn't jam ... but an E46 (1999-2005) did jam.

I guess it could be a few different variables though ; maybe the remote signals in the old car are simply weaker for whatever reason. Or the distances from where the person was standing each time were different
 
I think an appropriate caveat to most of the responses here needs to be that just because a particular remote didn't work on a car does not mean your car is safe in all cases, and that you can walk away from your car locking it over your shoulder without checking it is locked.

A friend of mine told me with one particular car (Peugot 206) the car seemed to be having an internal battle before deciding to surrender (French car)...
 
Mosgi said:
A friend of mine told me with one particular car (Peugot 206) the car seemed to be having an internal battle before deciding to surrender (French car)...
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Actually, of the 9 cars we tested - it was the only car that didn't have a yes/no answer.

Ours worked ... then didn't ... then did ... then didn't
 
Dolby said:
Actually, of the 9 cars we tested - it was the only car that didn't have a yes/no answer.

Ours worked ... then didn't ... then did ... then didn't
Click to expand...

You sure you didn't accidentally leave the hazards flashing? :D

I was disgusted to discover that our gate remote could jam my 2010 Kia Cerato, but could not jam the 2006 Picanto. The irony.
 
In other news, car manufacturers have decided to bundle a free padlock with their cars.

I don't get why only some cars are affected?:confused: Shouldn't they all be using the same frequency? And I don't buy the signal strength argument either...if it were that then the cars would open from vastly different ranges.
 
Lounger said:
Hold the key to your chin and press button. This increases the range. Tried and tested...
Click to expand...


Spot on. Works every time. But some naughty ou can still block your signal if he is close enough
 
Not every instance of a remote not locking or unlocking a car is necessarily someone trying to jam the remote ;) It just so happens that someties the signals get scrambled by itself for some reason, and you 'sync' it again by standing close to the car and pointing towards the steering column. This was the case for my previous car (BMW E46).
 
HavocXphere said:
In other news, car manufacturers have decided to bundle a free padlock with their cars.

I don't get why only some cars are affected?:confused: Shouldn't they all be using the same frequency? And I don't buy the signal strength argument either...if it were that then the cars would open from vastly different ranges.
Click to expand...




Only remotes using the 433 MHz frequency will be affected. This is one of the bands allocated by ICASA (who know best) for short-range radio. If your remote worked on a different frequency (eg an old Peugeot which works on 222MHz) then it would have no effect

In addition, the transmit range for locking is better than the transmit range for unlocking. The manufacturer doesn't want you to inadvertantly unlock your car when you are 20 metres away while fiddling in your pocket for change, so this is restricted. The alarm knows that the next signal it will get is an unlocking code and adjusts the range to suit.
 
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