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XC60 Alarm going off for no apparent reasonViews : 2798 Replies : 25Users Viewing This Thread : |
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Oct 19th, 2023, 19:45 | #1 |
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XC60 Alarm going off for no apparent reason
I have tried the obvious things such as checking the bonnet and all the windows and doors are fully closed. It is parked outside but fairly sheltered from the wind and there is no passing traffic. No sign of a cat or something jumping on it.
I've read somewhere that a low battery could cause it. The stop/start one was down to 12.01 volts so clearly not very happy. Does anyone know if the alarm circuit is supplied from this battery or does it come from the main start battery. ie the one under the boot floor? This one seems fine at 12.7v Any other ideas welcome. Thanks.
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Oct 19th, 2023, 20:13 | #2 |
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The only times I've had my alarm go off for no apparent reason, I ended up finding an insect (im my cases, big moths) inside the car that once they started flying around, they set the alarm off.
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Oct 19th, 2023, 20:24 | #3 |
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Had it with my S60, turned out it was the alarm module battery that was going flat, needed a new alarm module, no problem after that.
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Oct 19th, 2023, 20:33 | #4 |
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Ah OK. Thanks. Yes maybe. Is that a diy job?
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Oct 19th, 2023, 22:07 | #5 |
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Hi,
I had this issue on a MY17 XC90. As mentioned above it was the battery in the alarm module. I was told it was non-replaceable battery and the whole unit (siren) was replaced. Also told that it was not covered under the Volvo extended warranty as the fault was a battery - which are excluded from cover. This applied even though it was the whole unit that had to be replaced. No problems since - but it wasn't cheap... |
Oct 19th, 2023, 22:14 | #6 |
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you need to get it diagnosed first to find out what the fault is.. the many alarm causes are stored and can be read out by Volvo as can a lot of data about the 12 volt main battery operation and history .
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Oct 20th, 2023, 21:54 | #7 | |
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Quote:
I've booked it in anyway and the service department advised me that in the meantime I should lock the car manually by using the detachable key blade so the alarm isn't set. I'm tempted to change the alarm module batteries myself. They are on ebay for about £24.
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Oct 21st, 2023, 08:14 | #8 |
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If you're planning to keep the car for some time it won't do any harm to replace the battery, at least you'll know it should be ok for some years. I took my V70 module out some years ago and it seems a bit brutal having to cut it open but it can be done.
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Oct 21st, 2023, 12:40 | #9 |
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Yes. That's what I was thinking. I've seen a couple of Youtube videos and will have a go. I couldn't find anything specific to a UK XC60 although one from the USA shows the module to be under the left wing. Looks like I'll need the Dremel to dismantle it!
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Oct 21st, 2023, 18:02 | #10 |
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Not a very successful afternoon. I thought it might be a good idea to take the module apart before ordering the batteries so I could double check the dimensions, voltage etc.
I took off the nearside wheel and inner wing plastic shield. Guess what ..... no sign of the alarm module. It is definitely not there. Before doing anything else I deliberately set off the alarm to try and identify its location. I did this by leaving a window open then locking the car. After a minute I waved a bit of cloth around inside and the alarm went off instantly. But, here's the thing, the alarm was a high pitched chirp sound. Very ear splitting but not the same as the original problem alarm. That is just a horn sound. And I still couldn't make out where on the car it is coming from.
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