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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 : 2755 Replies : 28Users Viewing This Thread : |
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May 9th, 2021, 15:36 | #21 | |
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I removed the wiper arms, then that plastic panel which has around 6 plastic clips and a rubber strip holding it in place. With that lifted you will see a black vented cage item to the left of the main battery looking from the front of the car into the engine bay. It’s a fiddle to get out and there are several sharp edges so be careful and wear gloves. The electrical plug unclips and you can remove the siren with cage part attached from the bulkhead bracket and take it out of the car. Mine has been quiet (no hazard flashes or dash errors either) and behaving for over a week now since replacement. I think the interior sensors error is a red herring perhaps as the siren playing up had previously caused a few unexpected alarm triggers on cold evenings. Fingers crossed! Thanks Stu
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May 9th, 2021, 15:47 | #22 |
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https://i.imgur.com/gJCj51u.jpg
https://i.imgur.com/gvtFRIH.jpg Hopefully this works, I can’t resize the images easily from an iPhone so just adding links.
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2017 V60 CC D4 AWD Polestar Last edited by Stu B; May 9th, 2021 at 15:49. |
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May 9th, 2021, 16:22 | #23 |
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Thank you. Well that explains a lot - the siren in my car is not there! Ill have another look behind the wheel arch covers… Very odd!
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May 10th, 2021, 09:34 | #24 |
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Just found my siren. It wasn’t under the scuttle cowl but was above and behind the front left wheel. Easy to get to by removing the wheel and mud guard, electrical connection removed by inserting a small flat head and levering up the clip
Last edited by dlb; May 10th, 2021 at 09:53. Reason: Update |
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May 11th, 2021, 16:45 | #25 |
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Well found! If you crack it open see what the battery looks like as mine was soldered into the PCB so I didn’t bother replacing that and just swapped the whole siren for a newer secondhand unit. If the battery unplugs it might be an easy swap to just replace that as per previous advice on here and YouTube videos.
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May 11th, 2021, 19:48 | #26 |
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It's not difficult to unsolder and replace the battery on the PCB but you do need a replacement battery of the same type with the same solderable pin configuration. Batteries with leads should be easier but you may not be able to get one with the same connector so you may be cutting and soldering the connector from the old battery to the new one. However over £100 saving against a new one is a worthwhile incentive.
The problem with second hand siren units is that Varta give a life to their battery of 6 years and second hand the battery is likely to be well into that so it will fail relatively quickly. The reason that DIY owners buy second hand siren units is when their own has a destroyed PCB they can fit a new battery to a second hand unit that has a good circuit board and still save £70 to £80 on the repair. If your siren has a good circuit board you don't need a second hand one and can fit a new battery to your own unit. You've done the hard part; you found the damn thing!
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May 14th, 2021, 12:11 | #27 |
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I opened the siren (metal type) by a quick grind on the spot welds and a tap with a punch. Jimmied the plastic siren out, cracked it open by tapping around the seam with a knife and replaced the 2 x aaa cordless phone type batteries with new ones. I had to splice the cables as I couldn’t match the connector.
I now have silent alarms with flashing hazard lights and still have the Alarm System Service Required error message. Could this be an internal sensor issue? |
May 14th, 2021, 15:51 | #28 | |
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Replacing batteries if the circuit board is all corroded is pointless.
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May 14th, 2021, 17:35 | #29 | |
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This is assuming the circuit board looks good as Kev says of course.
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