Thread: V70: Electrical - VIDA Reading off alarm cause - help!
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Old May 4th, 2021, 12:37   #12
george57l
George
 

Last Online: Apr 26th, 2024 22:32
Join Date: Dec 2004
Location: London, UK
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Quote:
Originally Posted by ShadeTek View Post
If the car horn sounds, this means the ECU has lost connection to the siren and as a failsafe, it sounds the car horn, assuming it has been deliberatley tampered with in attempt to disable the siren.
Ah - thanks for that. I should have been more precise...

When I said it went off with "horn", I am not sure if it was horn or siren.

IIRC it was horn (but I would not swear to it) so maybe there is a problem, if it has lost connection between ECU and siren. But I would not expect such a problem to actually trigger the alarm in the first place - which is my 'first level' problem.



Anyway, it will be off to the dealer for a check/diagnosis soon enough.
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XC70 T6 Polestar (2014 registered, MY15)
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