Alarm malfunction -maintenance required

[ambrosedheffernan]

Hi all,

Volvo s60 2014 D4 181hp business edition

Quick question on this error code:

I noticed my stop/start was not working just before this error code appeared, does anyone know from which battery the alarm backup batteries inside the alarm sensor diode charge from?

I presume if I charge the main battery, it will charge the support battery and in turn the alarm system (if working ok)?

Or am I just going to have to replace the alarm siren unit?

[Chrisv60]

The alarm batteries are a couple of AAA NiMH batteries of the type you find in a cordless phone. The main car batteries would have to be virtually completely dead for them not to provide any charge.

The alarm batteries tend to fail/corrode after 6 years or so, see the other thread on here for fixing suggestions.

[ambrosedheffernan]

Originally Posted by Chrisv60

The alarm batteries are a couple of AAA NiMH batteries of the type you find in a cordless phone. The main car batteries would have to be virtually completely dead for them not to provide any charge.

The alarm batteries tend to fail/corrode after 6 years or so, see the other thread on here for fixing suggestions.

Thanks! Will gove that a try.