I have a 2007 xc90 4.4 v8 and was driving fine then parked it and the nxt time I went to start it it would start but no instrument panel lights or ac systems worked. But motor ran and was driveable.

so I researched and the module under the dash at drivers feet was removed and I looked at the board and it had water damaged.

I ordered a used module and replaced and plugged up now I have instruments lights and ac but when you go to turn it over it will not crank. Totally confused at this point please someone help....

thanks in advance

 

Which module did you replace? Did it look like this? If so your CEM needs to be programmed to work with your car, A used one will not simply just work. Someone like these folks can help you.

https://xemodex.com/us/central-elect...ule-for-volvo/

 

You can have the original CEM rebuilt by xemodex as previous poster said.

you should find the cause of the water leak first though else you'd keep fixing it.

 

so Got a used CEM and now it just won’t start so can I go to a Volvo certified shop and get this done or do I have to send it off. Those guys want a lot just to reprogram.

thank you for the info I just thought it was a plug and play, that’s what I get for thinking

 

The normal process to replace a CEM =

1. Diagnose bad CEM and remove
2. Buy a NEW CEM ~$780 and install
3. Program CEM, at a minimum requires an account with Volvo ($0), A DICE unit (~$100 to ~$500, clone versus Volvo), a 3 day VIDA subscription and the needed software (~$150), the appropriate windows cpu to run the software, a high quality battery charger (can't let voltage get low when programming) and the technical knowledge/ability to use VIDA (it takes a while to figure out how to make it work)
4. Solve the water leak problem into the CEM - that is common and Volvo suggested a fix - probably somewhere in their technical journal or a service bulletins - you can read those with your subscription.

So you could replace and program a NEW CEM yourself or find a shop that has used VIDA, has a DICE unit and is capable. My shop used to replace and program all sorts of control units using my VIDA subscription, it's not really that complicated once you get used to using the software. (I had about 15 years of practice though) I would charge 1 hour labor to program the NEW CEM, plus labor to diagnose, R&R, and whatever it took to seal the cowl area to prevent water from coming in.

BUT - you have a used part - you CAN'T program a USED module with VIDA - A company such as xemodex does offer that service - it looks like for $329 + shipping to transfer your program from your old CEM to your used CEM - if - it is compatible.

By the way - Volvo cars North America does not "Certify" or approve or in any way sanction any independent shops/garages - to work on their cars. Nor do they offer any formal technician training for non-dealer techs. Anything we learned was through independent means (or trial and error) - Training opportunities were usually a dealer sponsored event, or one of the several major parts wholesale houses sponsored training events, or classes at trade shows like SEMA.

 

Not an official/recommended solution but I took my CEM apart after water damage,

Cleaned the corrosion with isopropyl alcohol and a brush and left to dry properly and almost all functionality has been restored.

I've heard some people replace relays and the like but I'm not that savvy.

 

I appreciate all the info thank you guys for responding.....