ha_smith wrote:I may pull the starter and have a look at it as it does pull the volts down a lot when the engine is cranking.
Anybody in central Texas with Vadis that might want to help check codes?

Allen

Well, it is not the starter! Or the battery!

As much as I hate to do it for the short time I am planning on keeping this car I am going to have to buy the Vadis. I thought I was on to something when I saw the volts drop at the CEM from key off to key on but new battery didn't help. I may pull the starter and have a look at it as it does pull t...

[/quote] Going to swap the battery with another known to be good and see what happens. Allen[/quote] Okay, put in new battery; volts at CEM key off is 12.4, key on is 12.2. Continued watching volt meter as engine was cranked, dropped to 9.6 volts. After engine started made a smooth, steady increase ...

Allen[/quote] Next step will be to check voltages! Allen[/quote] Finally got around to checking voltage this morning after car sat overnight. Key in off position, volts at battery 12.36, volts at CEM 12.44 Key in on position (engine off) volts at battery 11.68, volts at CEM 11.8 Engine running volts...

My money's on the CEM. Try contacting XeModex in Canada for a rebuild quote. Before this check earth and voltage supplies to all modules. Is the alternator producing too much AC voltage? ( yes I DO MEAN AC not DC) Measure this voltage with engine running. I will work on checking grounds and voltage...

I will look at that, although nothing has been knowingly spilled in that area. I am open to all suggestions!! The airbag module is the only one that comes up ready on the self test.

My money's on the CEM. Try contacting XeModex in Canada for a rebuild quote. Before this check earth and voltage supplies to all modules. Is the alternator producing too much AC voltage? ( yes I DO MEAN AC not DC) Measure this voltage with engine running. I will work on checking grounds and voltage...

precopster wrote:IPD Volvo sell a tool for this job. It is pretty much a necessity if you want to reseat the computers on the P2 chassis.

Thanks Mike, I will get that if I decide to go that route. I still can't believe that someone else has not had the same issue and not posted a resolution!

Allen

Is there a way to remove the two control modules located in the box at front right fender? I would like to check the connectors for corrosion and re-seat them.

An Ebay Via/Dice might be worth your time if you plan on keeping the vehicle for a while. The CEM might be at fault, but I doubt you want to shotgun parts at the thing. Especially when they're so expensive. I would like to drive it another year, son is getting his drivers license. Did just have to ...