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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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Alarm service requiredViews : 1685 Replies : 22Users Viewing This Thread : |
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Jan 8th, 2021, 18:22 | #1 |
Junior Member
Last Online: Dec 4th, 2023 09:50
Join Date: Jan 2020
Location: Alsager, S-o-T. ST7 2DB
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Alarm service required
My alarm goes off in the night and is now showing a service is needed. I can lock the car and leave for a while without it going off.
Where would I start to look for the fault please ? |
Jan 8th, 2021, 18:50 | #2 |
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Last Online: Today 20:18
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Location: Manchester
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alarm siren failiure its a common problem with some volvo models of a certain age .
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Jan 8th, 2021, 20:57 | #3 | |||
Me ? Surely Not!
Last Online: Today 10:04
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
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Almost certainly the battery within the Alarm Unit.
Provided the printed circuit board is ok, a new battery can be fitted if your handy. When mine played up , a replacement battery was of no use due to damage to the circuit board from the old battery leaking. I bought a good used alarm unit which sorted it. cheshired5 on here has done a video covering this.
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“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
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Jan 9th, 2021, 18:26 | #4 |
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Last Online: Feb 28th, 2023 21:25
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Location: Wirral
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I agree, but would add that if simply replacing the battery, clean the board thoroughly to remove any residue.
I replaced mine as a precaution when I first got the car. There was minimal damage when I took it apart, but no symptoms yet. Then, 2 years later I had problems. When I took it apart again, the corrosion had continued. I had to carry out some major board repairs, but this time I washed the board with white vinegar, then clean water to kill off any battery residue. Obviously, I dried it thoroughly before re-powering it. More information on this thread. https://www.volvoforums.org.uk/showthread.php?t=306010
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2003 V70 2.4SE Auto. Gone now. 2003 XC90 D5. Auto. |
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Jan 10th, 2021, 23:32 | #5 |
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Last Online: Dec 4th, 2023 09:50
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Location: Alsager, S-o-T. ST7 2DB
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Many 😊.
I’ll give it a go when the weather permits and I’ll let you know how I get on. |
Jan 11th, 2021, 14:38 | #6 |
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Last Online: Dec 4th, 2023 09:50
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Location: Alsager, S-o-T. ST7 2DB
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7.2v battery
Just bought the same battery shown in the video from eBay for £14. Should get it by the weekend 😊
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Jan 24th, 2021, 09:19 | #7 | ||||
Volvo XC90 T6 & XC90 D5
Last Online: Mar 19th, 2024 17:44
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Location: Marple
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Quote:
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Feb 6th, 2021, 17:22 | #8 |
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Last Online: Feb 28th, 2023 21:25
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Mark sent me his board.
The damage was very localised, but very bad. The capacitor I thought was labelled C1 is C19. That part of the board was destroyed. No evidence that there was a component or tracks there. The board itself is eaten through a little. I took a similar capacitor from a donor board he sent me. I then traced the tracks and soldered links on the reverse of the board to hold the capacitor. These miniature components are terrible to solder by hand. Pic 1& 2. Damaged board with battery connector removed Pic 3. Board cleaned with vinegar to prevent further damage. Pic 4 shows where severe damage was. Pic 5 shows repair. (Probably worse soldering I've done in a while, but I couldn't manage it without burning myself!).
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2003 V70 2.4SE Auto. Gone now. 2003 XC90 D5. Auto. |
Feb 6th, 2021, 18:25 | #9 |
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Well done and we'll rescued.. I assume it now works.
I appreciate just now much effort went into resurrecting this module. In the past I was an electronics engineer, but these days would not have attempted this! Well done again! John l |
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