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Perspicacious

Member Since: 05 Feb 2010
Location: Melbourne
Posts: 20

Help: alarm keeps going off (Puma)

Nearly every time I lock my doors the alarm goes off, even though all of the doors are shut. The alarm is the double beep-beep beep-beep beep-beep that you get when you lock the car with a door open. But it just keeps going instead of beep-beeping once.

When I do manage to lock the without the beep-beeping then, after some indeterminate period, the alarm goes off but this is the single beep beep beep.

I have noticed that the internal light often comes on when I drive even though I have the switch in the position for the light to come on only when a door is open. This makes me think there is a loose wire somewhere as the car seems to think a door is open when it is not.

I have taken to the dealer, who said they found a frayed wire and fixed it. Problem was solved for 2 weeks but has come back.

I have noticed that when I lock the car with the key (not the fob) the doors lock and then immediately unlock.

Any ideas?

1st Oct 2011 3:29am

WelshGas

Member Since: 01 Oct 2010
Location: Vale of Glamorgan
Posts: 935

2010 Defender 90 Puma 2.4 XS CSW Santorini Black

Have you checked the "Dealer" repair?

Each door has a pressure switch, as does the bonnet, that completes a circuit to earth. Normally held in a door pillar via 1 self-tapper. Check each one. Obviously drivers door has most use.

LANDYWATCH

Neighbourhood Watch for Land Rover Owners

http://www.landywatch.co.uk/smf2/index.php

1st Oct 2011 4:51am

kingofthesparks

Member Since: 06 Jan 2011
Location: Very close to Watford gap services , northants
Posts: 987

had this problem several times when i had my puma, either the bracket on the door needs bending out to push switch in more or screw needs tightening i,e poor earth, seems worse on hot days due to expansion.

1st Oct 2011 7:40am

markb110

Member Since: 22 May 2010
Location: Guildford
Posts: 2644

Also worth looking at is the bracket for the bonnet switch.

Both mine and a mates car had the same issue.

To test make a ball out of tape and put it on to the switch, shut the bonnet and test the alarm. If Ok bend the bracket up a little.

Good luck

Mark

1st Oct 2011 9:28am

pjw4233

Member Since: 30 Nov 2009
Location: Lake District & Cheshire
Posts: 273

2011 Defender 90 Puma 2.4 HT Stornoway Grey

Have the same problem with mine. Bad connection/earth on the inside light. It only effects mine when really wet, ie just after using jet wash or after travelling on motorway when there is alot af spray. I've had to disconnect the central locking and just use the key to lock and unlock doors until I have time to go to dealer which probably will not happen until the the first service is due. I didn't realise there was also a switch on bonnet, I'll have a look at this is I've tried all the door switches.

3rd Oct 2011 7:29pm

Dave-H

Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

2007 Defender 90 Puma 2.4 HT Tonga Green

Try a better dealer!

If they plug it in to nanocom it will tell them exactly what switch/sensor activated it. The alarm ECU logs the last two activations.

HTH Guns and Landrovers .... anything else is irrelevant.

3rd Oct 2011 7:42pm

Perspicacious

Member Since: 05 Feb 2010
Location: Melbourne
Posts: 20

Turned out be a ECU problem. New ECU (second replacement) sorted the problem.

IMHO the electronics on the Defender is the Achilles heel. I have had plenty of problems with the alarm system, doors not locking and the engine not starting. All ultimately sourced back to an electronic problem. Apart from a weeping transfer case seal (but that is normal as far as I can tell) I've not had a mechanical problem.

Sometimes I think about selling my girl because of the problems. But I'd miss her. Now I have 35,000km on the clock and most of the problems sorted. A few trips to the High Country, Fraser Island, the Simpson Desert and assorted days trips around Melbourne have convinced me that a Defender has no peer for serious off road work. And my wife loves it! She drives the Defender in preference to "her" Mercedes.

20th Oct 2011 9:15am

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