MG ZT Alarm going and couldn't turn it off

MartynSudworth · 14th February 2009, 20:31

Help!
Last night (3am) my MG ZT alarm went off - no-one near it, no flashing car lights anywhere, just the sounder going off, for about 30 seconds (about) then stopping and then going off again. The remote (or just the key locking the door) did nothing, no 'door open' on the dashboard, I checked boot and bonnet but it all had no effect.

I could even start the car and drive it with the alarm doing the same thing (so immobiliser wasn't active). After about 20 minutes, it stopped and has been OK since.
Obviously, me and the neighbours aren't too keen on this, does anyone have any clues as to why it did this?
It's been raining a lot recently so I suspect rain somewhere maybe, but where do I look/spray WD40?

CDTi · 14th February 2009, 20:57

Quote:

Originally Posted by MartynSudworth

Help!
Last night (3am) my MG ZT alarm went off - no-one near it, no flashing car lights anywhere, just the sounder going off, for about 30 seconds (about) then stopping and then going off again. The remote (or just the key locking the door) did nothing, no 'door open' on the dashboard, I checked boot and bonnet but it all had no effect.

I could even start the car and drive it with the alarm doing the same thing (so immobiliser wasn't active). After about 20 minutes, it stopped and has been OK since.
Obviously, me and the neighbours aren't too keen on this, does anyone have any clues as to why it did this?
It's been raining a lot recently so I suspect rain somewhere maybe, but where do I look/spray WD40?

I had a problem with a windscreen leak at one stage and it caused the alarm to go off. It was caused by water intrusion into the BCU, which is located under the glove box.

Tim · 14th February 2009, 21:03

.............plus there is a security module which may also have water in it. But would also stop the doors from double locking so perhaps not.

And welcome to the forum

MartynSudworth · 14th February 2009, 21:39

leak under the glove box makes sense - the passenger side got very wet. Initially I thought a bottle had leaked onto the floor but now suspect water came from outside. Where exactly is the BCU (and what does it look like)?
Thank for the reply

Tim · 14th February 2009, 21:44

Quote:

Originally Posted by MartynSudworth

leak under the glove box makes sense - the passenger side got very wet. Initially I thought a bottle had leaked onto the floor but now suspect water came from outside. Where exactly is the BCU (and what does it look like)?
Thank for the reply

Where you have had the leak by the sound of it. Its that area, and is on a bracket. What leaked?

Lots of write ups on here on what will cause water to come into the cabin. Most common is blocked water outlets at the two hinge fixings location, plus one between the bulkhead (centre of the car between the engine and cabin).

MartynSudworth · 15th February 2009, 08:37

The front passenger carpet was soaked, not sure exactly how the water got in. The water outlet above on the passenger side was blocked, so I've now cleared that. I'll check the centre one, thanks.

CDTi · 15th February 2009, 10:55

IIRC you need to take out the govebox to get a good look at the BCU. Mine was cream coloured but I think the colour depends on the spec of the car i.e. if your model has rear electric windows etc.

The leak on my car was caused by poor bonding of the windscreen to the car on the passenger side.

Kandyman · 15th February 2009, 13:05

If you have a read to of the clubs "How To" there is a write up and picture

http://www.the75andztclub.co.uk/foru...read.php?t=102

14th February 2009, 20:31	#1
MartynSudworth Newbie MG ZT Join Date: Feb 2009 Location: bristol Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	MG ZT Alarm going and couldn't turn it off Help! Last night (3am) my MG ZT alarm went off - no-one near it, no flashing car lights anywhere, just the sounder going off, for about 30 seconds (about) then stopping and then going off again. The remote (or just the key locking the door) did nothing, no 'door open' on the dashboard, I checked boot and bonnet but it all had no effect. I could even start the car and drive it with the alarm doing the same thing (so immobiliser wasn't active). After about 20 minutes, it stopped and has been OK since. Obviously, me and the neighbours aren't too keen on this, does anyone have any clues as to why it did this? It's been raining a lot recently so I suspect rain somewhere maybe, but where do I look/spray WD40?

14th February 2009, 21:03	#3
Tim Feel the size of my Quads MG ZT 440SE, MG HS PHEV & MG3 Join Date: Nov 2006 Location: Addlestone Posts: 1,735 Thanks: 0 Thanked 128 Times in 85 Posts	.............plus there is a security module which may also have water in it. But would also stop the doors from double locking so perhaps not. And welcome to the forum __________________ Member 23 or 63 depending on what you look at. https://www.two-sixties.co.uk/mgoc26...0rum/forum.php http://two-sixties-blog.com/ http://www.youtube.com/user/TheTwoSi.../1/1wPt2rhd_Ps

15th February 2009, 10:55	#7
CDTi This is my second home No longer in the MGR club Join Date: Nov 2006 Location: Tipperary Posts: 3,933 Thanks: 35 Thanked 51 Times in 35 Posts	IIRC you need to take out the govebox to get a good look at the BCU. Mine was cream coloured but I think the colour depends on the spec of the car i.e. if your model has rear electric windows etc. The leak on my car was caused by poor bonding of the windscreen to the car on the passenger side. __________________ 'Tis better to be silent and be thought a fool, than to speak and remove all doubt.

14th February 2009, 21:39	#4
MartynSudworth Newbie MG ZT Join Date: Feb 2009 Location: bristol Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	leak under the glove box makes sense - the passenger side got very wet. Initially I thought a bottle had leaked onto the floor but now suspect water came from outside. Where exactly is the BCU (and what does it look like)? Thank for the reply

15th February 2009, 08:37	#6
MartynSudworth Newbie MG ZT Join Date: Feb 2009 Location: bristol Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	The front passenger carpet was soaked, not sure exactly how the water got in. The water outlet above on the passenger side was blocked, so I've now cleared that. I'll check the centre one, thanks.

15th February 2009, 13:05	#8
Kandyman Banned ROVER 75 2.5 V6 Connoisseur SE Limousine 2004 Join Date: Oct 2006 Location: Welling Posts: 10,995 Thanks: 0 Thanked 2 Times in 2 Posts	If you have a read to of the clubs "How To" there is a write up and picture http://www.the75andztclub.co.uk/foru...read.php?t=102