V 40 seemingly random alarm

N11EYA · Mar 4th, 2024, 12:11

Hi all, it seems that I have a fault that could be relatively common if my searching is up to scratch & I am seeing advice/help.

I get seemingly random alarm activations & I think it is the bonnet switch as I occasionally see the warning that it is open when it isn't.

I am going to have a look at the obvious this afternoon & am wondering (in case that is not the issue) if anyone can post a wiring diagram for the 2015 v40 D2 alarm system?

Alternatively, if there are any adjustments I can do which may help.

Many thanks.

N11EYA · Mar 6th, 2024, 08:00

If anyone comes across this & wonders what the problem/fix was, here goes.

As expected the issue was the bonnet switch.

What I found was that the "loops" that come from the bonnet to latch into the bonnet catches were both a bit out of alignment.

Both were off to one side & one (the one with the switch on it) was off too far forward meaning that it was only catching the latch right on its rearmost corner, so not fully making it all of the time.

With everything adjusted as they should be the alarm is now not alarming randomly.

Petey80 · Mar 10th, 2024, 02:39

Good to know as I've seen a lot of posts from people (mainly on the V40 crew Facebook Group) about this type of issue.

Will also come in handy for me when it inevitably occurs.

Mar 4th, 2024, 12:11	#1
N11EYA New Member Last Online: Mar 6th, 2024 08:00 Join Date: Jan 2023 Location: York	V 40 seemingly random alarm Hi all, it seems that I have a fault that could be relatively common if my searching is up to scratch & I am seeing advice/help. I get seemingly random alarm activations & I think it is the bonnet switch as I occasionally see the warning that it is open when it isn't. I am going to have a look at the obvious this afternoon & am wondering (in case that is not the issue) if anyone can post a wiring diagram for the 2015 v40 D2 alarm system? Alternatively, if there are any adjustments I can do which may help. Many thanks.

Mar 10th, 2024, 02:39	#3
Petey80 Premier Member Last Online: Apr 25th, 2024 20:13 Join Date: Feb 2017 Location: North East, Teesside	Good to know as I've seen a lot of posts from people (mainly on the V40 crew Facebook Group) about this type of issue. Will also come in handy for me when it inevitably occurs. __________________ Thread V40 T2 R-Design - https://www.volvoforums.org.uk/showt...56#post2901756 Thread V50 D2 R-Design - https://www.volvoforums.org.uk/showthread.php?t=264890 - CRASHED

Mar 6th, 2024, 08:00	#2
N11EYA New Member Last Online: Mar 6th, 2024 08:00 Join Date: Jan 2023 Location: York	If anyone comes across this & wonders what the problem/fix was, here goes. As expected the issue was the bonnet switch. What I found was that the "loops" that come from the bonnet to latch into the bonnet catches were both a bit out of alignment. Both were off to one side & one (the one with the switch on it) was off too far forward meaning that it was only catching the latch right on its rearmost corner, so not fully making it all of the time. With everything adjusted as they should be the alarm is now not alarming randomly.

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