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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2227   
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Do you have the interior ultrasonic sensor (above drivers side b pillar or by rear view mirror)?
Might sound stupid but make sure you have no coins or metal objects (keys, spanners etc) exposed nor anything plugged into the cigarette lighter within the range of the sensor. Most likely it is moisture caused the ultrasonic sensor to rust. Simply pull it free of the roof lining and unplug it, it can then be pushed back to fill the hole. Should stop triggering for now until you can source a replacement. Steve 02' 110 TD5 Double Cab Rebuild Thread |
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7th Jul 2015 10:53am |
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| Lambley Member Since: 20 Apr 2013 Location: Mid Devon Posts: 1435 
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Thanks Steve,
I do have the sensor behind my right ear, but I unplugged it after the first time it went off, so last nights events were without the sensor. It did look ok and not damaged or rusty though. There's nothing plugged into the ciggy lighter at the moment. It just seems strange that it's gone off totally randomly. |
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7th Jul 2015 11:20am |
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| GREENI Member Since: 22 Aug 2010 Location: staffs Posts: 10381
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If you want a replacement sensor, get in touch with Kevin at MUD UK, he has a bag full, won't be expensive!!!
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7th Jul 2015 11:25am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372 
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If the vehicle battery voltage drops low enough the BBUS will sound, but not the vehicle horn (same as if the battery was disconnected. I doubt when the alarm was sounding you noticed whether just the BBUS on its own, or both the BBUS and the horns were sounding, but when it next happens see if you can determine this.
If it is a sensor (or other) problem causing the alarm to active, they'll all sound. If it is low battery voltage, just the BBUS wil sound. If you have access to a diagnostic tool (eg Nanocom) the AS10 unit should have logged the trigger event, unless it was low battery voltage in which case the BBUS will just have done its own thing autonomously. (I am assuming that you have a BBUS, of course). |
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7th Jul 2015 11:51am |
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| Lambley Member Since: 20 Apr 2013 Location: Mid Devon Posts: 1435
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Thanks for the replies - but what's a BBUS?
The horn was sounding in a constant tone until I pressed the blipper |
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7th Jul 2015 12:25pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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Battery Back Up Sounder. An additional little plug and play item that protects against battery cables being cut.
http://www.defender2.net/forum/topic35612.html?highlight=bbus If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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7th Jul 2015 3:28pm |
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| Dora Member Since: 12 May 2015 Location: South East Posts: 170 
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Has it been raining where you are lately? I had a similar thing some years back. The alarm kept going off randomly and the only common thing was it was always wet when it happened. Finally traced it to water getting across a door switch fooling it into thinking the door had been opened! New switch, job done, but frustrating in the mean time!!
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7th Jul 2015 6:11pm |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467 
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Could be a faulty or mis-aligned bonnet switch.
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7th Jul 2015 6:13pm |
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| Lambley Member Since: 20 Apr 2013 Location: Mid Devon Posts: 1435
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It was certainly windy and showery last night, the previous time (now I come to think about it) - I'd jet washed it earlier that day
 All over, even cleaned the engine bay (eek) maybe some water has got in somewhere and it's still not dry yet. I don't use much pressure when washing, I just got carried away.
I've ordered a set of door switches just in case though 
The bonnet switch is new, the old one gave up and stayed down constantly so it was replaced a few months ago but I'll check that too. Thinking about it now though - I might check the bonnet switch position as my vehicles a Td5 but I've had a Puma bonnet fitted ages ago. |
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7th Jul 2015 7:46pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372
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If it's a faulty switch causing this a Nanocom would let you find out which one - the AS10 should log the trigger events.
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7th Jul 2015 8:52pm |
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| Lambley Member Since: 20 Apr 2013 Location: Mid Devon Posts: 1435
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Yes, I'd like a diagnostic tool, I've put a wanted ad in 'for sale/wanted'
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7th Jul 2015 8:59pm |
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