2005 S40 Hazards Flashing when parked

Welton · Apr 18th, 2018, 12:21

I'm sat at work and someone from next door came in saying my Hazards were flashing.

Went to the car and unlocked and no Alarm had been triggered so I'm confused. I locked/unlocked a few times and it's not happened since (2hrs) it's making me wonder if this has been happening before or during the night and I don't know about it.

I've noticed recently when I lock the car the Hazards don't flash instantly but maybe a second later which is unusual behavior.

Any thoughts?

domhart10 · Apr 18th, 2018, 12:28

sure you got all your doors closed properly when leaving the car?

If i havent closed some of mine properly it doesnt really lock properly and does a weird hazard flash I think. I will have to check again and get back here.

Welton · Apr 20th, 2018, 09:44

This has moved on a bit, yesterday I got back to the car and the display read: ALARM TRIGGERED - CHECK CAR or something.

I've dealt with this by turning off the interior sensors, that'll teach it

Bit bothered that it's the Siren Unit though, we'll see.

Ignatz · Apr 20th, 2018, 09:58

I had a similar problem which was fixed under warranty. Other threads in this forum suggest that leaving wifi enabled devices in the car can trigger the alarm.

Andy c70 · Apr 20th, 2018, 12:25

It might be worth spraying a bit of silicone or grease into the door latches. There is a microswitch/sensor in some that might randomly sense that the door is open even though it's not causing interior lights ect to come on. It has happened with my c70(solved by lubing the door catches) and I guess it might trigger the alarm?

Andy

Apr 18th, 2018, 12:21	#1
Welton Premier Member Last Online: Sep 14th, 2021 17:03 Join Date: Feb 2009 Location: Market Harborough	2005 S40 Hazards Flashing when parked I'm sat at work and someone from next door came in saying my Hazards were flashing. Went to the car and unlocked and no Alarm had been triggered so I'm confused. I locked/unlocked a few times and it's not happened since (2hrs) it's making me wonder if this has been happening before or during the night and I don't know about it. I've noticed recently when I lock the car the Hazards don't flash instantly but maybe a second later which is unusual behavior. Any thoughts? __________________ 2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale) 2010 Citroen C4 1.6 HDi (bizarre Gearbox model). 2010 Renault Twingo (refreshingly simple) 2018 Infiniti Q30 1.6T Business Executive (what's this button do?)

Apr 18th, 2018, 12:28	#2
domhart10 Volvo S40 Last Online: Today 11:50 Join Date: Mar 2015 Location: Chichester	sure you got all your doors closed properly when leaving the car? If i havent closed some of mine properly it doesnt really lock properly and does a weird hazard flash I think. I will have to check again and get back here. __________________ ----------------------------------------- Current: 2009 Volvo S40 T5 Progress Thread: https://www.volvoforums.org.uk/showthread.php?t=271945 Previous Volvo: 2008 S40 SE Lux R Design 2.0D

Apr 20th, 2018, 09:44	#3
Welton Premier Member Last Online: Sep 14th, 2021 17:03 Join Date: Feb 2009 Location: Market Harborough	This has moved on a bit, yesterday I got back to the car and the display read: ALARM TRIGGERED - CHECK CAR or something. I've dealt with this by turning off the interior sensors, that'll teach it Bit bothered that it's the Siren Unit though, we'll see. __________________ 2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale) 2010 Citroen C4 1.6 HDi (bizarre Gearbox model). 2010 Renault Twingo (refreshingly simple) 2018 Infiniti Q30 1.6T Business Executive (what's this button do?)

Apr 20th, 2018, 09:58	#4
Ignatz Junior Member Last Online: Feb 2nd, 2024 15:56 Join Date: Jan 2017 Location: Lincolnshire	I had a similar problem which was fixed under warranty. Other threads in this forum suggest that leaving wifi enabled devices in the car can trigger the alarm.

Apr 20th, 2018, 12:25	#5
Andy c70 Junior Member Last Online: Apr 4th, 2019 21:29 Join Date: Apr 2018 Location: Bishops Stortford	It might be worth spraying a bit of silicone or grease into the door latches. There is a microswitch/sensor in some that might randomly sense that the door is open even though it's not causing interior lights ect to come on. It has happened with my c70(solved by lubing the door catches) and I guess it might trigger the alarm? Andy

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