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Alarm siren making random chirruping noises
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jamescarruthers   
Thu Nov 11 2021, 11:44am
Joined: Jan 19 2014
Member No: #1548
Location: Cambridge
 I’ve noticed that after I lock the car, with the remote key fob, that it sometimes makes weird little chirruping noises which sound like the siren making last gasps at life sort of noises.

Has this happened to anyone else? Is there maybe a backup battery I need to replace in the siren?

Also, when I was away for a few weeks my neighbour mentioned that the C6’s alarm had been going off. Thankfully all was well (and the battery wasn’t flat, which was my first concern after hearing the alarm had been going off).

Any ideas? I’ve deactivated the interior volumetric sensors just to be on the safe side with it going off, but this doesn’t stop the occasional chirruping! I’ll try and record it later.
jamescarruthers   
Thu Nov 11 2021, 05:13pm
Joined: Jan 19 2014
Member No: #1548
Location: Cambridge
 Just realised that the chirruping isn’t related to being locked or not. It was on the drive today, unlocked and making its little noises.

Captured them on this video:

- Click Here -
Jas16   
Thu Nov 11 2021, 10:47pm
Joined: Feb 07 2017
Member No: #2994
Location: West London
 really wild guess sounds like throttle resetting itself

I would try a BSI reset, to see if this helps.

Though my diagnosis is likely way off the mark so better for someone else to feedback
jamescarruthers   
Fri Nov 12 2021, 09:36pm
Joined: Jan 19 2014
Member No: #1548
Location: Cambridge
 The throttle— May I ask why? I know it’s a drive-by-wire throttle on these but never heard a noise. I’ll certainly consider it though, thank you.
Jas16   
Mon Nov 15 2021, 08:57pm
Joined: Feb 07 2017
Member No: #2994
Location: West London
 I only thought as they "may" click open and closed as a form of calibration

sorry I know it a wild guess. You could scan for codes to see if anything has been triggered as a starting point.

Though definitely consult someone more knowledgeable than me!
jamescarruthers   
Mon Nov 15 2021, 09:04pm
Joined: Jan 19 2014
Member No: #1548
Location: Cambridge
 Haha, still worth bearing in mind. Cheers!
cruiserphil   
Tue Nov 16 2021, 12:58pm

Joined: Jan 24 2010
Member No: #38
Location: Celbridge
 Hello James,

You can test the alarm system with Diagbox. Are you happy the alarm siren is the source of the the noise?

Best regards,

Phil C.
jamescarruthers   
Tue Nov 16 2021, 05:15pm
Joined: Jan 19 2014
Member No: #1548
Location: Cambridge
cruiserphil wrote ...

Hello James,

You can test the alarm system with Diagbox. Are you happy the alarm siren is the source of the the noise?

Best regards,

Phil C.


Not particularly but it’s quite loud so I made a bit of an assumption!
 

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