VIDA faults - Com with 5 control modules signal missing

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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FinReaper
Posts: 3
Joined: Mon Jan 07, 2019 9:17 am
Year and Model: 2001 V70
Location: OR

VIDA faults - Com with 5 control modules signal missing

Post by FinReaper »

2001 V70 base 283k miles.

Below are all the faults listed from VIDA. Does this mean my CEM is going bad with all these missing signals?

Steering wheel - no turn signals, no cruise, no bright head lights, no radio controls, wipers only one speed.

UEM - no cabin light control, no sun roof motor control

Image

jimmy57
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Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
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Post by jimmy57 »

GO to the fuebox and relay box under left dash. That is also the CEM in the middle of that box. CHeck that every fuse and relay is pushed in and also that you have no blown fuse. Those modules aren't all on one leg of the comm line but I do think they may all share a power supply point. If that relay is partway out and isn't powering up the list of modules then they can't talk.

FinReaper
Posts: 3
Joined: Mon Jan 07, 2019 9:17 am
Year and Model: 2001 V70
Location: OR

Post by FinReaper »

I should've mentioned that I checked every fuse in the cabin, driver side. I also replace every relay/diode on the CEM with those from my xc70. No change.

FinReaper
Posts: 3
Joined: Mon Jan 07, 2019 9:17 am
Year and Model: 2001 V70
Location: OR

Post by FinReaper »

It is fixed! I had the CEM cloned and that didn't change anything. I found a like SWM at the JY and replaced it. No dealer software reload or software needed. Plug and play, which pleasantly surprised me. Now everything is working back as it should. :)

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