Alarm keeps going off after a few hours

levon · 25th January 2015, 11:13

I have an 02 Rover 75 and just yesterday this issue occurred at night. The car has been parked and locked by fob outside the house for several hours when the alarm starts going off. We go outside to see whats what but nothing wrong,no doors open or windows or bonnets or anything. So lock it again by fob and after an hour it starts going off once more. We leave it unlocked this time for a few hours and all is ok, start it up for a few minutes and then lock it by fob once more. All is ok until 4am this morning when the alarm starts going off once more so it has been left unlocked since.
Anybody any ideas what is causing this?
Also just wondering if there was a fuse or such that I could just disconnect the alarm altogether? As long as the car locks Id be happy to do without an alarm.

myfirstrover · 25th January 2015, 12:09

Quote:

Originally Posted by levon

I have an 02 Rover 75 and just yesterday this issue occurred at night. The car has been parked and locked by fob outside the house for several hours when the alarm starts going off. We go outside to see whats what but nothing wrong,no doors open or windows or bonnets or anything. So lock it again by fob and after an hour it starts going off once more. We leave it unlocked this time for a few hours and all is ok, start it up for a few minutes and then lock it by fob once more. All is ok until 4am this morning when the alarm starts going off once more so it has been left unlocked since.
Anybody any ideas what is causing this?
Also just wondering if there was a fuse or such that I could just disconnect the alarm altogether? As long as the car locks Id be happy to do without an alarm.

Mine did the same , it turned out to be a faulty BCU .

RAY OF THE ROVERS · 25th January 2015, 12:10

I had the same problem a few months back, it was the battery, a loose earth clamp on the battery. I tried tightening them but ended up opening the clamp gap with a file to get a tighter fit. Yours may be a completely different problem but its worth testing and cleaning the poles and clamps. Good luck.

Arctic · 25th January 2015, 12:21

HI Pat.
Double check the bonnet switch as these can cause trouble in the very cold weather, also spray some white lithium grease into each door lock, if that fails you can unplug the alarm horn under the bonnet, it is next to the ecu .

Also try a battery reset and check the battery is in good condition fully charged, and lets not forget the plenums just in case they are flooded.

levon · 26th January 2015, 12:22

Just an update for you.The alarm didn't go off all day yesterday or last night while locked but at 6am this morning it started up. Now the car won't lock at all it says there is a fault but not what the fault is and also the ignition doesnt seem to be off fully. The speedometer and temp gauge are on and I can use the windows and wipers though I shouldn't be able to. It seems to be getting more complicated..

dadragon · 26th January 2015, 12:41

levon, as Arctic says battery reset is favourite, I had my alarm go off over the Christmas period and it kept happening every half Hour or so, cleaned the bonnet switch and left the battery off over night and it's been fine since.
Regards DaDragon

Arctic · 26th January 2015, 13:45

Hi Pat.
What is the weather like in Ireland is it raining a lot then freezing at night if so once again I would check the plenums because if it is blocked with ice the water can and will build up rapid, but please make sure also you have a good battery even if you think it is good give it a charge over night.

http://www.the75andztclub.co.uk/foru...d.php?t=125864

levon · 26th January 2015, 16:42

Arctic, Thank you for the advice,however that was cleaned out last Thursday and a new pollen filter fitted. Just seems to have started suddenly.I have the battery disconnected until tomorrow morning and then we shall see. I shall keep you all posted.

JEK · 26th January 2015, 17:52

Quote:

Originally Posted by levon

Arctic, Thank you for the advice,however that was cleaned out last Thursday and a new pollen filter fitted. Just seems to have started suddenly.I have the battery disconnected until tomorrow morning and then we shall see. I shall keep you all posted.

As ARCTIC originally suggested, the problem may well be with the bonnet switch on the top of the slam panel.

I had the same problem with my ZT-T after coming through heavy rain in Cheltenham. The 'bonnet open' warning came on for a short while and then went out.
I thought all was OK until 3am in the morning when the alarm went off.
I shut all the doors and locked the car with the key but ended up having to disconnect the battery
It went off again the next evening and I had to do the same again.
I put the battery on charge and all seemed ok but it went off again.
The problem was only resolved when I changed the bonnet switch, making sure it was sprayed with WD40 first.

It has been ok since and that's a year back now.

Union Wheels · 26th January 2015, 19:52

Hi levon,
in your first post, you ask if there is some fuse you can pull to prevent the alarm going off.

I am sure I have read on this forum, that locking the car with the key in the door lock, does not set the alarm, although it locks the car.

Pete.

25th January 2015, 11:13	#1
levon Newbie Rover 75 Join Date: Aug 2012 Location: Co.Mayo Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Alarm keeps going off after a few hours I have an 02 Rover 75 and just yesterday this issue occurred at night. The car has been parked and locked by fob outside the house for several hours when the alarm starts going off. We go outside to see whats what but nothing wrong,no doors open or windows or bonnets or anything. So lock it again by fob and after an hour it starts going off once more. We leave it unlocked this time for a few hours and all is ok, start it up for a few minutes and then lock it by fob once more. All is ok until 4am this morning when the alarm starts going off once more so it has been left unlocked since. Anybody any ideas what is causing this? Also just wondering if there was a fuse or such that I could just disconnect the alarm altogether? As long as the car locks Id be happy to do without an alarm. Last edited by levon; 25th January 2015 at 11:27..

25th January 2015, 12:21	#4
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,719 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	HI Pat. Double check the bonnet switch as these can cause trouble in the very cold weather, also spray some white lithium grease into each door lock, if that fails you can unplug the alarm horn under the bonnet, it is next to the ecu . Also try a battery reset and check the battery is in good condition fully charged, and lets not forget the plenums just in case they are flooded. __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

26th January 2015, 13:45	#7
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,719 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Hi Pat. What is the weather like in Ireland is it raining a lot then freezing at night if so once again I would check the plenums because if it is blocked with ice the water can and will build up rapid, but please make sure also you have a good battery even if you think it is good give it a charge over night. http://www.the75andztclub.co.uk/foru...d.php?t=125864 __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

26th January 2015, 19:52	#10
Union Wheels Loves to post Honda Accord Tourer i dtec Join Date: Jul 2011 Location: Wakefield Posts: 331 Thanks: 56 Thanked 90 Times in 75 Posts	Not setting alarm Hi levon, in your first post, you ask if there is some fuse you can pull to prevent the alarm going off. I am sure I have read on this forum, that locking the car with the key in the door lock, does not set the alarm, although it locks the car. Pete. __________________ [SIGPIC][/SIGPIC] How to Retrofit Diesel Cruise Control + Loom http://www.the75andztclub.co.uk/foru...87&postcount=1 How to Modify a 3 Speed Fan for CDT & V6 into a 2 Speed with a Resistor. http://www.the75andztclub.co.uk/foru...d.php?t=209920 CDT now gone to new owner, but still on forum

25th January 2015, 12:10	#3
RAY OF THE ROVERS Avid contributor rover 75 tourer Join Date: Jan 2012 Location: Burnley Posts: 103 Thanks: 35 Thanked 13 Times in 9 Posts	I had the same problem a few months back, it was the battery, a loose earth clamp on the battery. I tried tightening them but ended up opening the clamp gap with a file to get a tighter fit. Yours may be a completely different problem but its worth testing and cleaning the poles and clamps. Good luck.

26th January 2015, 12:22	#5
levon Newbie Rover 75 Join Date: Aug 2012 Location: Co.Mayo Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Just an update for you.The alarm didn't go off all day yesterday or last night while locked but at 6am this morning it started up. Now the car won't lock at all it says there is a fault but not what the fault is and also the ignition doesnt seem to be off fully. The speedometer and temp gauge are on and I can use the windows and wipers though I shouldn't be able to. It seems to be getting more complicated..

26th January 2015, 12:41	#6
dadragon Gets stuck in Jaguar 3 litre sport. (Lee) Rover 75 Connoisseur T4'd (Roger) Rover 75 Connoisseur SE (Gaynor) Join Date: Oct 2007 Location: Wilmslow Posts: 691 Thanks: 194 Thanked 142 Times in 121 Posts	levon, as Arctic says battery reset is favourite, I had my alarm go off over the Christmas period and it kept happening every half Hour or so, cleaned the bonnet switch and left the battery off over night and it's been fine since. Regards DaDragon

26th January 2015, 16:42	#8
levon Newbie Rover 75 Join Date: Aug 2012 Location: Co.Mayo Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Arctic, Thank you for the advice,however that was cleaned out last Thursday and a new pollen filter fitted. Just seems to have started suddenly.I have the battery disconnected until tomorrow morning and then we shall see. I shall keep you all posted.