Alarm System Service Required

FUBAR · Post by **FUBAR** » 18 Jun 2008, 00:11

I found some pics on my computer I thought I'd share.. I took the siren out, and apart, sadly the internal circuitry has fried either by battery some kind of power surge, or too much ocean air or just plain sh!t engineering(MADE IN AUSTRALIA). New siren solves the "ALARM SYSTEM SERVICE REQUIRED" message and restores alarm functionality.

Post by **MadeInJapan** » 18 Jun 2008, 06:10

Fubar,
I see the burned section on the board. Are you saying you just replaced the siren and all was good or you had to replace the board or parts on the board...little confused here.

FUBAR · Post by **FUBAR** » 18 Jun 2008, 11:15

The entire siren needs to be replaced, only because the circuit board isn't available separately, not to mention the siren must be cracked open like an egg to get inside. I couldn't identify all of the broken chips on the siren circuit board. Dealer parts guy says the part number for the siren has changed, but using old p/n found new one. The service dept never charged me for software, so I am unsure if they forgot to charge for software, or if it's plug 'n' play. Upon testing at the dealer, hearing the high-pitched siren screaming was music to my ears.

Bottom-line: if someone reads this thread in the future, the solution to completely take care of the alarm alert message is to buy a new alarm siren and install it either themselves or at dealer. Only special tool needed is a drill to get 2 rivets off, and a riveter and some 6 or 7mm rivets. I was charged $80 for the installation and $175 for the part.

Outdoorguy1963 · Post by **Outdoorguy1963** » 09 Jul 2012, 09:35

I knew I needed to replace the siren on my 2002 V70 after I broke it and the headlight by sliding on ice into a guardrail. When I removed the headlight, I saw the broken siren and removed the old one. I got a similar price for a new one, I think at the time it was $165 plus tax. I decided to pass on replacing it. I just found a used one on ebay for $50 and decided to fix it. I tried to go through the headlight but forget the steps. So I decided to use the above steps as it looked easier. Unfortunately, when I pulled the rivets out, the metal box that supports the siren had a metal piece on the back so I couldn't slide it in like the above pictures show. There was not enough room to slide it into the box from the front. Instead, I just bent the back piece of the box with pliers and put the siren into the box as far as I could and bent the metal back over it. Not text book but it's in and working again. I got some rivets from NAPA auto supply for $11 and borrowed a riveter. I pried the old rivets out with a screwdriver and locking pliers without damaging the holes. The alarm works and no more messages to Service the Alarm System.

Post by **fazool** » 09 Jul 2012, 11:44

This is an old thread but was recently an issue for Outdoorguy1963.

The siren module has a weak design and the rechargeable batteris leak all over the siren module electronics.

The batteris (as all rechargeable batteries) wioll eventually not take a charge anymore and that can trigger the message as well.

This is intended as a disposable module but a few of us posted ways to replace the batteries only. I have a post that shows an ideal replacement battery. A used module, unfortunately will also have used batteries so they won't last a full lifetime.

willie83 · Post by **willie83** » 09 Jul 2012, 12:21

Do you have a link to the battery replacement procedure?

Post by **DGM** » 09 Jul 2012, 13:20

This thread is from the S80 board and it covers the subject pretty well.

https://www.matthewsvolvosite.com/forums ... 17479&f=11

If the module is original for your car, the circuit board is most likely corroded by the acid compoud of the battery. Replacing only the battery won't do it. You can open it first to assess its condition. On my 2005 I did it last year and the battery had already started to leak.

Post by **Toronto** » 02 Apr 2013, 13:53

Hi, I have the same symptom on my 2001 V70 T5 - do not know how its pop up just like that. Did you find the solution?

dn32844 · Post by **dn32844** » 13 May 2014, 09:15

I carried out a test as suggested by one of the posters here. I lowered window, put siren fuse back in and activated security alarm. Lights started flashing and whistle like sound started. Pushed unlock button all stopped. However, problem of flashing on its own still remains. When at home I do not activate alarm system, next day I it stays quiet for approximately 4 or 5 hours or as long as its not turned on and off again. It usually acts that way once or twice every 24 hour cycle.

barnes89 · Post by **barnes89** » 26 Nov 2015, 11:33

Hi,

I also have this problem. Took the siren out and checked the board and it is fried / badly burnt, smells off a fire, surprised it hasn't actually went up. Obviously the previous owner has avoided the warning message for a long time.

Does anyone have a spare circuit board or old unit?

Don't fancy paying £155 for a new one as already spent more than the purchase price sorting out all the faults with this car.

Did spend some time hacksawing through it neatly so i could tape it up once i had replaced the battery which looks like wasted time with a chargrilled board