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post #1 of 4 (permalink) Old 27th April 2008 Thread Starter
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Megane scenic '04 plate alarm problem

Hi Folks,

Wondering if anyone can help out here.

My mother in law has a megan scenic diesel '04 plate. The alarm intermittantly goes off by itself, and she asked me to take a look. Has been doing it for a while, but in 2 weeks she is moving to a high rise flat, so if it goes of in the car park there, she faces a bit of a trip down the lift to the car park to switch it off!

What I can say is that I have asked here to disable the interior sensors when she leaves the car, but she says it still goes off. I have covered the rear sensors in insulating tape. I have fitted a pad to the underside of bonnet to increase the travel on the pin switch there, but all to no avail. I can also say that after the alarm has sounded, upon unlocking the car, it beeps 4 times, and only seems to do this if the alarm has activated. Does the number of beeps indicate what caused the alarm to sound?

Any one have any ideas what the cause may be? Or is there anyway to disable the alarm entirely - a fuse maybe? I realise that the fuse for the alarm may also serve other systems, but would be willing to pull the fuse if those other systems weren't critical.

Any suggestions welcome, and thanks in advance to anyone who takes the time to read my first post!

Last edited by Gairloch; 27th April 2008 at 06:54 PM.
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post #2 of 4 (permalink) Old 5th May 2008 Thread Starter
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Apologies for bumping up this thread, but I am still having probs with this car. I have now fitted a plate to permanently hold down the boonet switch to rule that out. I have also disconnected all the door handle sensors (the little button on the front and the infra red sensor behind the handle), thinking that it may have been a problem with the keyless entry, but the alarm is still going off. Can anyone help me out on this? Please?

I did notice (prior to removing the upper internal door trims to disconnect the handle sensor multi plug), that one or twice when i opened the car with the hands free, that although I had opened the drivers door (opened, not just unlocked), the the central locking made noises as if it was attempting to lock and unlock repeatedly for a few seconds, and the courtesy lights on the inner door panels were going on and off. This only happened to me after I had used my hand down the back of the handle to open the car without using the key. This is what prompted me to disconnect the sensors, but maybe to someone more in the know, it indicates a problem elsewhere? Possibly the car doors are attempting to lock or unlock themselves at times, and this is triggering the alarm?

Many thanks

Last edited by Gairloch; 5th May 2008 at 07:10 PM.
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post #3 of 4 (permalink) Old 2nd July 2008 Thread Starter
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Just thought that I'd let anyone else who may have a similar problem, what I did here. Ultimately, I couldn't isolate, and therefore fix the alarm problem. The ocuurences were too random to be able to point me in any useful direction. I ended up disconnecting the alarm. In the boot, passenger side, under the carpet just behind the passenger rear seat, is a multi plug. This comes from the alarm unit which is behind the side trim on the left hand side of the boot. I disconnected this multiplug. The central locking still works as it did, the immobiliser still works, but no alarm, and therefore no false activation. Not a solution, and maybe not ideal in all cases, but at least it worked for me. Thought I'd share.
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post #4 of 4 (permalink) Old 15th July 2009
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hi, i was told if you insert the key card twice within 10 seconds then lock the car within 20 seconds the buzzer will sound 4 times to confirm deactivation of the volumetric sensors , hope this info is useful.
Currently in deni.babe's garage:
2003 megane 2 1.6vvt dynamic
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alarm , megane , plate , problem , scenic

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