2004 Volvo S40 Alarm Issues

Monkeymagic1 · Nov 6th, 2012, 19:32

I have sold my bother in laws S40. I took it for a MOT and got it taxed ready for collection on Thursday. Anyway it had been fine until a few days ago when the every time i got in the car it said alarm activated check car. I did all well.
To cut a long story short if I lock the car and leave it then walk past it the feckin alarm goes off. It does it every time I or my neighbour walks past it.
I have read about the siren so found it in the plenum chamber and unplugged it.
now it doesn't sound but hazards go off and keep going off if a walk near it???
I have ordered a new siren from Volvo £99. I was convinced that was the fault until I opened the old siren.
The PCB and the battery look like new no sign of leaked acid as I expected.
Am i about to waste £99????
Any advice or experiences would be appreciated.

Monkeymagic1 · Nov 7th, 2012, 11:31

Well siren changed and no difference.
I have unplugged the mass movement sensor and although it says alarm service required I can walk past the car without it activating the alarm. Looks like its time for new sensor!

Bendolfc · Nov 7th, 2012, 12:30

Probably no help at all but check you haven't left a phone in there or something, if I leave my Nexus 7 in the car the alarm goes off all the time, thought it was NFC at first but disabled that on the tablet but still happens, assume it must be WIFI as that doesn't sleep on the tablet with screen off like it does on most phones.

Monkeymagic1 · Nov 7th, 2012, 13:59

its defo not that. its fine until someone stands within a foot of passenger side front door. if i turn off sensor with switch it behaves fine. found sensor on ebay 65 140 from dealer

gilgamesh1066 · Nov 7th, 2012, 19:54

I had similar issues....see below - might help.

http://volvoforums.org.uk/showthread.php?t=160879

Monkeymagic1 · Nov 8th, 2012, 11:12

i doubt its something like that. i haven't got two weeks to rectify the fault anyway. ill change the mms and see.
is it just me or is this forum slow? Im sure i.m not alone with the alarm issue. in fact the electrical faults in general with these cars

gilgamesh1066 · Nov 8th, 2012, 22:41

Didn't take 2 weeks - I left if for 2 days ... I would start by locking it manually with the key overnight and see where you go from there.

Monkeymagic1 · Nov 9th, 2012, 12:47

Ta mate. id been doing that anyway to stop alarm. if i disable sensor its perfect. I've got second hand sensor now so Will report back and hope it does trick

Monkeymagic1 · Nov 9th, 2012, 18:07

well mms changed for second hand item £65 and problemn is resolved. I'll give it a couple more days to make sure but before everytime stepped within foot of front doors it went off.
Hope this helps anyone with same problem, apparentoy volvo have reviced the sensor now but new one is 140 and needs setting up on VIDA.

gilgamesh1066 · Nov 11th, 2012, 22:59

Where is the mms located??

Nov 6th, 2012, 19:32	#1
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	2004 Volvo S40 Alarm Issues I have sold my bother in laws S40. I took it for a MOT and got it taxed ready for collection on Thursday. Anyway it had been fine until a few days ago when the every time i got in the car it said alarm activated check car. I did all well. To cut a long story short if I lock the car and leave it then walk past it the feckin alarm goes off. It does it every time I or my neighbour walks past it. I have read about the siren so found it in the plenum chamber and unplugged it. now it doesn't sound but hazards go off and keep going off if a walk near it??? I have ordered a new siren from Volvo £99. I was convinced that was the fault until I opened the old siren. The PCB and the battery look like new no sign of leaked acid as I expected. Am i about to waste £99???? Any advice or experiences would be appreciated.

Nov 7th, 2012, 11:31	#2
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	Well siren changed and no difference. I have unplugged the mass movement sensor and although it says alarm service required I can walk past the car without it activating the alarm. Looks like its time for new sensor!

Nov 7th, 2012, 12:30	#3
Bendolfc Premier Member Last Online: Apr 25th, 2024 12:10 Join Date: May 2010 Location: Liverpool	Probably no help at all but check you haven't left a phone in there or something, if I leave my Nexus 7 in the car the alarm goes off all the time, thought it was NFC at first but disabled that on the tablet but still happens, assume it must be WIFI as that doesn't sleep on the tablet with screen off like it does on most phones.

Nov 7th, 2012, 13:59	#4
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	its defo not that. its fine until someone stands within a foot of passenger side front door. if i turn off sensor with switch it behaves fine. found sensor on ebay 65 140 from dealer

Nov 7th, 2012, 19:54	#5
gilgamesh1066 Member Last Online: Feb 14th, 2017 12:35 Join Date: Jun 2010 Location: Birmingham	I had similar issues....see below - might help. http://volvoforums.org.uk/showthread.php?t=160879

Nov 8th, 2012, 11:12	#6
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	i doubt its something like that. i haven't got two weeks to rectify the fault anyway. ill change the mms and see. is it just me or is this forum slow? Im sure i.m not alone with the alarm issue. in fact the electrical faults in general with these cars

Nov 8th, 2012, 22:41	#7
gilgamesh1066 Member Last Online: Feb 14th, 2017 12:35 Join Date: Jun 2010 Location: Birmingham	Didn't take 2 weeks - I left if for 2 days ... I would start by locking it manually with the key overnight and see where you go from there.

Nov 9th, 2012, 12:47	#8
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	Ta mate. id been doing that anyway to stop alarm. if i disable sensor its perfect. I've got second hand sensor now so Will report back and hope it does trick

Nov 9th, 2012, 18:07	#9
Monkeymagic1 New Member Last Online: Nov 9th, 2012 18:07 Join Date: Oct 2012 Location: Redditch	well mms changed for second hand item £65 and problemn is resolved. I'll give it a couple more days to make sure but before everytime stepped within foot of front doors it went off. Hope this helps anyone with same problem, apparentoy volvo have reviced the sensor now but new one is 140 and needs setting up on VIDA.

Nov 11th, 2012, 22:59	#10
gilgamesh1066 Member Last Online: Feb 14th, 2017 12:35 Join Date: Jun 2010 Location: Birmingham	Where is the mms located??

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