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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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VIDA Reading off alarm cause - help!Views : 2668 Replies : 28Users Viewing This Thread : |
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May 4th, 2021, 00:08 | #11 |
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If the car horn sounds, this means the ECU has lost connection to the siren and as a failsafe, it sounds the car horn, assuming it has been deliberatley tampered with in attempt to disable the siren.
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Tek-Emo Villis Emo Bis V70 SE NAV 1.6 D2 2015MY POWERSHIFT, D4162T, 86000miles, RED. /VOL FCR/PEPER OBD2/Acron 9135 OBD2/L.E.D Flasher/VDASH/ANCEL BA301 |
May 4th, 2021, 13:37 | #12 | |
George
Last Online: Mar 26th, 2024 21:49
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Quote:
When I said it went off with "horn", I am not sure if it was horn or siren. IIRC it was horn (but I would not swear to it) so maybe there is a problem, if it has lost connection between ECU and siren. But I would not expect such a problem to actually trigger the alarm in the first place - which is my 'first level' problem. Anyway, it will be off to the dealer for a check/diagnosis soon enough.
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George - - - - - - - - - - - XC70 T6 Polestar (2014 registered, MY15) |
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May 4th, 2021, 23:08 | #13 | |
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Quote:
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2007 (P3) Volvo S80 SE 2.4D (163bhp) - 109,000 miles. Black exterior with cream leather interior. |
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May 5th, 2021, 11:23 | #14 | |
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The problem lies in the fact that the back up battery has to be protected from interference to maintain the security status of the alarm system and so the unit is sealed with no open/close system but there is no battery which will last the lifetime of the car. It's not a plot by Volvo but it is an expensive predictable nuisance. Mine failed after only three years and the Volvo dealer who sold me the car replaced it fee of charge under the Volvo Selekt warranty but 6-7 years isn't going to get you any special treatment.
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May 8th, 2021, 21:57 | #15 |
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My son had the same issue with his s60 2010 model . Always went off at night when temp dropped. Fitted a replacement and all sorted.
Opened up old unit all looked well with no corrosion and battery seemed to check out. Think fault developed in circuitry probably age related( built in redundancy ?)
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The secret of flight is to aim at the ground and miss ! Previous Volvos 740 GLE . V40 CD ,V70 2.4 SE LPT.V70 D5 P2. V70 D5 Se Lux P3. Current Jaguar XF Sportbrake but still like Volvos |
May 8th, 2021, 23:14 | #16 |
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Presumably other OEMs ( apart from Ford/ Volvo/ Landrover/ Mazda cars of the early 2010's using common parts ) use sirens with rechargeable batteries as well, do they not fail? It's not that widely reported as an issue. Strangely, the siren on my my wife's 2012 Mazda 3 has not failed either.
If a new siren is fitted by a Volvo dealer, it may well have 5 year old batteries in it already on the cusp of failing. Seems a pretty stupid design feature. Yes, I have such an issue with my 2015 V60 Polestar !! Taking the fuse for the siren out in February stopped the alarm ( flashing indicators only) triggering. Putting it back in last week, no such problem but still with an alarm malfunction message . |
May 9th, 2021, 00:07 | #17 | |
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or there is a bird in the car or something like that ...
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May 9th, 2021, 00:15 | #18 |
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I vaguely remember posts relating to those roof sensors; a certain batch failing
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May 9th, 2021, 00:34 | #19 |
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yes especially around 2009 ... that's why volvo changed them from radio waves to conventional ultrasonic ..
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May 9th, 2021, 14:22 | #20 |
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Thank you Stu! I have exactly the same issue and will see if I can replace the battery to fix the siren. When you say the siren is to the left of the main battery, do you mean near side or offside ( mine is a RHD 2015 XC70 UK version) and is there any chance you can post a photo of its location and a little on how you got it out?
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