Key fob stopped working after BSI reset

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Paul-R
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Re: Key fob stopped working after BSI reset

Unread post by Paul-R »

You need to take that new fob to somewhere that has equipment to check that pressing the buttons actually has an effect. If they don't then not only can't you lock/unlock the car, you can't synchronise or resynchronise the fob.
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aerodynamica
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Re: Key fob stopped working after BSI reset

Unread post by aerodynamica »

GiveMeABreak wrote: 18 Dec 2024, 18:04 Some aftermarket fobs don't have the required circuit / electronics to operate the remote elements like the third button function or the locking. These have to be compatible for these functions to work as I’m guessing you're finding out .
Hi Marc, sorry the 'new' fob is 4 months old and all 3 buttons have been working fine - can open the boot with the middle button. This problem is a sudden change.
Graeme M
2008 C5 Exclusive Tourer 2.0 HDi
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aerodynamica
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Joined: 26 Dec 2007, 18:10
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Re: Key fob stopped working after BSI reset

Unread post by aerodynamica »

Paul-R wrote: 18 Dec 2024, 18:09 You need to take that new fob to somewhere that has equipment to check that pressing the buttons actually has an effect. If they don't then not only can't you lock/unlock the car, you can't synchronise or resynchronise the fob.
Hi Paul, this was going to be my next question - what equipment is available for checking the button outputs.

But, I have an update: I have managed to get the remote to lock and unlock by pressing the buttons while pushing hard on the back cover. It seems there might be a battery contact issue. Or an issue with the board itself. The keyfob is an unbranded one with no chevrons on it. It does have the correct 3 buttons and the middle one has the boot open instead of headlights symbol. It appears decent quality internally but is a totally different internal structure to the original one where the board is semi loose in the casing and the battery fixes to the board. This has the board actually part of the half casing with the battery located in the other half - contacts meet when the two halves are clicked back together. I can't help but think this arrangement might be the issue.
Graeme M
2008 C5 Exclusive Tourer 2.0 HDi
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dulenator
Donor 2024
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Joined: 08 Dec 2021, 21:44
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Re: Key fob stopped working after BSI reset

Unread post by dulenator »

I had the same problem with the new fob - the issue was slightly misaligned buttons. I figured that out by making direct contact on the board with the flat screwdriver (or anything else metal :)).
I bought a new case and solved the issue.
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