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D4 alarm keeps going off (new battery and linked bonnet swit
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Jowniofownio212
 


Member Since: 29 Jun 2023
Location: UK
Posts: 4

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Scotia GreyDiscovery 4
D4 alarm keeps going off (new battery and linked bonnet swit

Hello all

Having a problem with my 2011 D4 alarm randomly going off. Searched online and tried the obvious and still no joy.

It seems to go off after a few hours of being locked up. I’m not double clicking the lock to activate the interior sensors. I have fit a new Bosch battery and I have disconnected the bonnet closed switch and linked it out.

On occasions (not every time) when I go to start it, it says battery low, please start engine.

Is there any way to diagnose the alarm system to see what is causing the alarm to go off?

The rear boot switch has been a bit temperamental to open too but when it’s locked up, I can bang the boot and mess with the switch and the alarm doesn’t go off.

Thanks in advance  
Post #234072529th Jun 2023 7:03 am
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1670

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

My thoughts are that it sounds like you have a battery drain issue, and that may be causing the alarm. Have you fitted any new electrical equipment to the car recently ( camera, tow electrics etc)? Gary
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Discovery 4 HSE 2016MY  
Post #234073229th Jun 2023 8:29 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 13022

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

Worth checking the earth straps/battery negative cabling. .


Dean
====================================

2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer Sad ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms  
Post #234073429th Jun 2023 8:34 am
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Jowniofownio212
 


Member Since: 29 Jun 2023
Location: UK
Posts: 4

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Scotia GreyDiscovery 4

Thanks for the input, will report back but now you mention it, I’ve recently altered some settings on the dash cam to pick up motion. Wonder if it’s that!  
Post #234074129th Jun 2023 8:57 am
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1670

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Just in case it's useful, there are also reports of a faulty bonnet latch causing the alarm to go off. Might also be worth checking if you have got to the bottom of it. Search bonnet latch/ alarm on the forum.
Good luck Gary
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Discovery 4 HSE 2016MY  
Post #23410623rd Jul 2023 9:21 am
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Jowniofownio212
 


Member Since: 29 Jun 2023
Location: UK
Posts: 4

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Scotia GreyDiscovery 4

Thanks for the replies.

Dash cam has been removed. Connections to the battery have been checked and look ok.

Leaving car unlocked and over night the battery is going flat so it seems it’s either a faulty battery (only 6 months old and Bosch) or something is draining the battery. This morning it was so flat that the car would not start.

Not sure if to try a new battery or is there something that could be draining it?

Thanks  
Post #23411304th Jul 2023 7:01 am
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1670

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Yes, it’s going to be a process of elimination. There’s a lot of info on the forum on quiescent battery drain testing and how to go about doing it. You might want to check that out. I’ve read through it , although never had to do it. It seems you need to be thorough, disciplined and rigorous when doing it.
Hopefully there’ll be others along with more experience and technical input on how to proceed. Good luck
Cheers. Gary
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Discovery 4 HSE 2016MY  
Post #23411424th Jul 2023 9:00 am
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1670

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Here’s the topic I had in mind:

https://www.disco3.co.uk/forum/robbies-gui...tery+drain

Another’s experience with great help from a member called Pete K:

https://www.disco3.co.uk/forum/power-drain...tery+drain

And another that might be useful:

https://www.disco3.co.uk/forum/topic187920.html

As you can see it’s not uncommon. Gary
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Discovery 4 HSE 2016MY  
Post #23411434th Jul 2023 9:11 am
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Jowniofownio212
 


Member Since: 29 Jun 2023
Location: UK
Posts: 4

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Scotia GreyDiscovery 4

Think I have got to the bottom of this. Cleaned up the battery terminals and it hasn’t come back.

Thanks for the advice and suggestions everyone  
Post #234201313th Jul 2023 12:52 pm
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Pedros
 


Member Since: 25 Jun 2011
Location: Cumbria
Posts: 454

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Santorini BlackDiscovery 4

It's really encouraging when a problem with a D4 is solved simply and easily. Wish that all such issues were so....  
Post #234204113th Jul 2023 4:06 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8230

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

It took the power of the forum to sort it, Hardware suggested it on 29th of June Bow down It can when others can't,
It will when others won't,
It goes where others don't.  
Post #234204613th Jul 2023 4:46 pm
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