Siren spoof with Micro-controller?

sexton16 · Jul 18th, 2013, 14:50

Hi, I'm in the first week of Volvo ownership and discovering just how complicated they are.My alarm appears to do nothing but blink a LED so I've been reading all the posts I could find about the siren and its' inevitable demise.
I was wondering if anyone had ever built a replacement using a micro-controller to give the security module the reply it wants to see?Does anyone know the question and the required answer?

Ovlovdriver · Jul 19th, 2013, 11:44

have you sat in the car with it locked? any volvo i've had only has motion sensors on the inside that go off with the slightest of movement

sexton16 · Jul 19th, 2013, 14:26

Did another test while it was quiet.Sat in car set alarm then bounced about,heard a sound like a very small mouse inside a box some distance away.Looks like the siren is on it's last legs, will have to get a pop rivet gun.
Did find more on the theory of operation though.
http://www.kvaser.com/zh/about-can/r...ndards/46.html

Jul 18th, 2013, 14:50	#1
sexton16 Junior Member Last Online: May 9th, 2021 05:34 Join Date: Jul 2013 Location: vansbro	Siren spoof with Micro-controller? Hi, I'm in the first week of Volvo ownership and discovering just how complicated they are.My alarm appears to do nothing but blink a LED so I've been reading all the posts I could find about the siren and its' inevitable demise. I was wondering if anyone had ever built a replacement using a micro-controller to give the security module the reply it wants to see?Does anyone know the question and the required answer?

Jul 19th, 2013, 11:44	#2
Ovlovdriver Senior Member Last Online: Jan 17th, 2015 09:36 Join Date: Nov 2012 Location: Kingsbridge	have you sat in the car with it locked? any volvo i've had only has motion sensors on the inside that go off with the slightest of movement __________________ My car: V40 2.0 se Previous: s60 2.4t, 2.0t, s70 and v70, s40, 240, 122s

Jul 19th, 2013, 14:26	#3
sexton16 Junior Member Last Online: May 9th, 2021 05:34 Join Date: Jul 2013 Location: vansbro	Did another test while it was quiet.Sat in car set alarm then bounced about,heard a sound like a very small mouse inside a box some distance away.Looks like the siren is on it's last legs, will have to get a pop rivet gun. Did find more on the theory of operation though. http://www.kvaser.com/zh/about-can/r...ndards/46.html

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