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Central locking inoperative using key fob.

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TheBoy:

--- Quote from: Doctor Gollum on 06 January 2022, 01:07:15 ---Interference from an external source.

As an example, certain stray 5g waves can interfere with completely different frequency bands...

Really long link thing

--- End quote ---
433MHz isn't really going to be impacted by "5G" (Boeing and Airbus are really only concerned about the sub 800MHz frequencies), as it wont be on a harmonic.

The 5G hysteria is a bit of a joke anyway, as those sub 800MHz frequencies were the same ones being pumped out at 100kW by any TV transmitter until recently.  Though, obviously, we know 5G controls the nanobots that the government are pumping into our arms, hence the constant spate of people setting fire to 3 and 4G cell towers....

Doctor Gollum:

--- Quote from: TheBoy on 06 January 2022, 10:28:46 ---
--- Quote from: Doctor Gollum on 06 January 2022, 01:07:15 ---Interference from an external source.

As an example, certain stray 5g waves can interfere with completely different frequency bands...

Really long link thing

--- End quote ---
433MHz isn't really going to be impacted by "5G" (Boeing and Airbus are really only concerned about the sub 800MHz frequencies), as it wont be on a harmonic.

The 5G hysteria is a bit of a joke anyway, as those sub 800MHz frequencies were the same ones being pumped out at 100kW by any TV transmitter until recently.  Though, obviously, we know 5G controls the nanobots that the government are pumping into our arms, hence the constant spate of people setting fire to 3 and 4G cell towers....

--- End quote ---
It was a real world EXAMPLE of cross frequency interference rather than an sole cause of the key fob problem... Volvo S/V40 key fobs used to be really good a stomping over Omega remote frequencies.

As to 5G, An informed, professional look at the subject  ;)

johnnydog:

--- Quote from: TheBoy on 06 January 2022, 10:23:29 ---Is one key "cloned" off the other - many locksmiths do this, and it doesn't work for long with systems that use a rolling code (virtually everything).


If not, back to basics.
Are you able to resync either fob that was previously working?

If yes, see how long it works after resync - if it does it again, likely that the fob needs repair (properly)

If no, its likely the fob needs repair (properly)


Whilst not impossible, its very, very rare for the ATWS/CL ecu to fail. Very rare.

--- End quote ---

Thanks for this info. I'll try a re-sycn, and speak to the place that sorted the key fobs to see how they programmed them or they did 'clone' one key off the other.
Is it possible to reprogramme an existing circuit board in a used fob from another car, as long as you have the pass for the current car, and the fob is on the same 433 frequency?

TheBoy:

--- Quote from: Doctor Gollum on 06 January 2022, 13:09:37 ---It was a real world EXAMPLE of cross frequency interference rather than an sole cause of the key fob problem... Volvo S/V40 key fobs used to be really good a stomping over Omega remote frequencies.

As to 5G, An informed, professional look at the subject  ;)

--- End quote ---
Anything on 433MHz will interfere, as will anything where 433 is a harmonic.  Most 433MHz are a short duration transmission, hence unlikely to cause issues.  Its not like you are allowed to use 433MHz for a wireless cctv camera, for example.

Most EU cars use 433, and we never see interference issue :)

Doctor Gollum:
Never is a stretch.  ;)

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