Other S80 Problem: - False Alarm Operation

switcher · May 27th, 2010, 23:12

2004 S80 D5 Se !05K

Car just passed MOT test reqd only one sidelight/parking bulb plus one number plate bulb. However whether by coincidence or not the car alarm now operates anything from one hour to four hours after doors being locked.
I always ensure air vents are closed and have ditched air refresher tree just in case. The siren sounds loud and clear and the main battery appears in good nick. Have also tried disabling tilt/vibration feature to no avail
This happens whether locking with remote or key.

Someone suggested battery volt drop after a while might cause it.

Anyone got any other ideas what might cause this.

grass hopper · May 27th, 2010, 23:15

usually this is down to the mass movement sensor (in the roof) there has been a few upgrades to the sensor.

worth checking the activation codes though first.

switcher · May 28th, 2010, 15:12

Thnks Grasshopper, how do I check the activation codes. Does this mean vsiting a dealer.

grass hopper · May 28th, 2010, 18:10

yes afraid so,there read of with vida,the MMS fits behind the square panel in the roof.

switcher · May 28th, 2010, 23:02

Thanks Grasshopper. Have now read previous posts on this to which you have contributed and have a fair idea now about this problem. Will have codes read for a start.

RobbieH · May 28th, 2010, 23:24

1) Check the bump stops on the bonnet. On my 2004 V70 they had unscrewed just enough to hold the bonnet up enough that the alarm activated randomly. Screwed them back in and all solved.

2) Do you get "alarm service " message on DIM? If so, (or maybe even if not) the rechargable battery in the alarm module (behind driver side front wing/arch) may be dying. A search will reveal a few threads on this subject.

switcher · May 31st, 2010, 20:07

Thanks Robbie, will check bump stops.

May 27th, 2010, 23:12	#1
switcher switcher Last Online: Dec 16th, 2011 22:17 Join Date: Mar 2006 Location: Rothesay	False Alarm Operation 2004 S80 D5 Se !05K Car just passed MOT test reqd only one sidelight/parking bulb plus one number plate bulb. However whether by coincidence or not the car alarm now operates anything from one hour to four hours after doors being locked. I always ensure air vents are closed and have ditched air refresher tree just in case. The siren sounds loud and clear and the main battery appears in good nick. Have also tried disabling tilt/vibration feature to no avail This happens whether locking with remote or key. Someone suggested battery volt drop after a while might cause it. Anyone got any other ideas what might cause this.

May 27th, 2010, 23:15	#2
grass hopper Premier Member Last Online: Mar 18th, 2011 13:38 Join Date: May 2009 Location: grassmere!	usually this is down to the mass movement sensor (in the roof) there has been a few upgrades to the sensor. worth checking the activation codes though first. __________________

May 28th, 2010, 18:10	#4
grass hopper Premier Member Last Online: Mar 18th, 2011 13:38 Join Date: May 2009 Location: grassmere!	yes afraid so,there read of with vida,the MMS fits behind the square panel in the roof. __________________

May 28th, 2010, 23:24	#6
RobbieH Two wheeled lycra lout Last Online: Jan 30th, 2024 16:56 Join Date: Jan 2007 Location: Salford View Photos By: RobbieH	1) Check the bump stops on the bonnet. On my 2004 V70 they had unscrewed just enough to hold the bonnet up enough that the alarm activated randomly. Screwed them back in and all solved. 2) Do you get "alarm service " message on DIM? If so, (or maybe even if not) the rechargable battery in the alarm module (behind driver side front wing/arch) may be dying. A search will reveal a few threads on this subject. __________________ Can we share the road please. Yes, I am insured on both 2 and 4 wheels. Not a motorist, not a cyclist, but a road user. 54 V70 D5 SE (163, EUIII) MTE, Eibach, Powerflex, IPD arb's, TWR FMIC, Ferrita cat-back.

May 28th, 2010, 15:12	#3
switcher switcher Last Online: Dec 16th, 2011 22:17 Join Date: Mar 2006 Location: Rothesay	Thnks Grasshopper, how do I check the activation codes. Does this mean vsiting a dealer.

May 28th, 2010, 23:02	#5
switcher switcher Last Online: Dec 16th, 2011 22:17 Join Date: Mar 2006 Location: Rothesay	Thanks Grasshopper. Have now read previous posts on this to which you have contributed and have a fair idea now about this problem. Will have codes read for a start.

May 31st, 2010, 20:07	#7
switcher switcher Last Online: Dec 16th, 2011 22:17 Join Date: Mar 2006 Location: Rothesay	Thanks Robbie, will check bump stops.

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