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Volvo V70 CEM-Vin-Code OK = NO

Posted: 13 Jun 2024, 21:28
by Hexxeh
Hi all,

I've got a 2004 Volvo V70 2.4 non-turbo petrol that won't start. It cranks but won't fire.

Vida shows no error codes but has "CEM-Vin-Code OK: NO" in livedata. Dealer has tried to reload CEM/ECM with no change.

I got dumps of the ECM/CEM to check sync, I think it's okay (files attached).

What else can I try? Will an immo emulator work here?

Thanks in advance for any help you can offer!

Re: Volvo V70 CEM-Vin-Code OK = NO

Posted: 14 Jun 2024, 08:41
by repair
If the starter works, it means that the CEM has authorised the engine block to start.
So there is synchronisation between CEM and ECU.
Which can be seen from your dumps ... .

Re: Volvo V70 CEM-Vin-Code OK = NO

Posted: 14 Jun 2024, 08:54
by Hexxeh
According to the manuals in Vida there's different stages of authorisations for the immo, the "CEM-Vin-Code OK" being no will permit the starter to turn but the car still won't start (attached screenshot of text in Vida that states this). Is there something about the data in the dumps that would cause that? Or do I just have a faulty CEM/ECM?