Am I screwed

exzile9 · Post by **exzile9** » 05 Jun 2018, 12:37

Hey how's it going folks. I'm looking for anybody who might be able to get me out of this Jam LOL. I have a 2005 XC90 2.9 Turbo all-wheel drive. I had a burnt circuit in my cem, swapped it out, and now the ECU is not communicating. Is there anyway Vida can fix this? Thanks in advance for any info.

Post by **RickHaleParker** » 05 Jun 2018, 12:50

You need to have the old CEM software and data cloned to the new CEM. Yes it is done with VIDA or you can send both out and have the cloneing done. If you do send them out to be cloned, mark the old one "Source" and the new one "Destination".

Central electronic module (CEM), replacing
Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

For further information, see Downloading software and replacing the control module

Preparatory work
Disconnecting the battery lead
Caution! The customer-programmed data must be read off before the control module is replaced. The relevant data must then be programmed into the new control module, via VIDA vehicle communication, after it has been installed.

Ignition off
Disconnect the battery negative cable. See: Battery, disconnecting .
Note! For vehicles equipped with Volvo On Call Plus, the automatic alarm for the emergency services may deploy.
Note! The driver information module (DIM) must not be replaced at the same time. This would erase the mileage.
Removal
Removing the wiper mechanism and cover

IMG-328728 Remove the wiper mechanism according to: Wiper mechanism windshield, replacing

IMG-328729
Removing the soundproofing panel on the driver's side

D8502309 Remove the 2 screws.
Hint:
The soundproofing panel sits in a groove at the pedal box.
Remove the soundproofing panel by pulling it straight down and back.
Removing the central electronic module (CEM)

M3703348 Remove:
the connectors
the control module by inserting a screwdriver up between the bracket and the relay box. Twist the screwdriver so that the bracket opens out. At the same time, pull the control module out of the bracket towards the underside of the dashboard
the control module from the bracket and pull downwards under the dashboard.
Installation

Ensure that the central electronic module (CEM) has as many fuses and relays as the replaced one.

Hint:
For the location of the fuses, see:
The wiring diagram for the relevant model year
The decals by the relevant fuse box in the vehicle
The Pocket Data booklet
The Owner's manual.
Installing the central electronic module (CEM)
Caution! The pins are fragile. Check that the connectors go straight down into the control module.
Install:
the control module on the bracket. Press the control module forward so that the catches enter the bracket
the connectors
the soundproofing panel on the driver's side
the 2 screws on top of the control module
the 2 connectors on top of the control module.
Note! Ensure that the rubber seal is correctly positioned in the groove.
Install:
the cover
the wiper arm mechanism. See: Wiper mechanism windshield, replacing
the battery negative lead. See: Battery, disconnecting .
Finishing
Ordering software

Order software. See: 9438273 .

Programming data

Program in the data read off from the old control module (customer-programmed data for example). This is performed via VIDA vehicle communication.

Reset the service reminder indicator (SRI). Otherwise the lamp will receive incorrect reference data. (Global time is reset when the central electronic module (CEM) is replaced.) Reset the service reminder indicator (SRI). See: Resetting the service reminder indicator (SRI) .

Check that the CAN-communication is functioning. This is done by reading off the control module ID for the central electronic module (CEM), rear electronic module (REM) and engine control module (ECM) via VIDA vehicle communication.

Other information

For the location of other relay and fuse boxes, see: Relays, fuse boxes and wiring .

Post by **ggleavitt** » 05 Jun 2018, 13:24

Not sure if this is helpful, I've successfully used these folks for a DIM swap in a 2003 S80 and they do this stuff for a living.

Were I in your spot, I might give them a call and see what other options you might have- https://xemodex.com/us/central-electron ... -volvo-05/

Good luck !

Post by **Roger_850T** » 05 Jun 2018, 21:16

I second the referral to Xemodex. I have not needed to use them (yet), but have heard a lot of good, positive feedback about them that they will be the first people I call when I do need help with any of my modules!

Roger

Post by **SuperHerman** » 05 Jun 2018, 21:31

Couple of questions? Did you put in a new or used CEM?

If new it will need to have software installed. VIDA with a correct paid subscription can do this. Dealer or a Volvo repair facility with a VIDA subscription can also do this for a cost. RickHaleParker in his response lists the software that is required.

If you installed a used unit, as I understand the CEM (from my XC70 research), a like for like swap will work. You will have issues with mileage, the vehicle will display the higher mileage of the donor CEM or your vehicle. I would wager that any CEM with the right software (the one listed by RickHaleParker) would work (with minor issues listed below).

You should be able to send your damaged CEM to Xemodex for repair and they will send it back all correct. If it is too far damaged they can take your old unit, pull the software and transfer it to the other unit.

As I understand it any new or used CEM with the correct part number can be (re)programmed with the correct software for your vehicle. (As I see it - since the CEM can be updated with new software, it can be reprogrammed) A used CEM from a like vehicle should have the correct software installed already with the caveat that certain information (ie mileage) will be different. It will still communicate the car. I have swapped three used modules (not CEMs) from like vehicles on my XC90 without any problems.

All the modules, including the CEM, needs to have software installed at some point. I have been wrong before, but that is my understanding.

That said if you put in a used CEM check your connections. It appears you have VIDA - what is it telling you? Have you checked all the fuses, shunts and relays?

exzile9 · Post by **exzile9** » 07 Jun 2018, 16:27

Thanks for all the info guys!! I have a used CEM. I have Vida now , but I keep getting an error message (object doesn't support property or method "diagnostic allowed". . I'm not finding any concrete thru searching.

exzile9 · Post by **exzile9** » 07 Jun 2018, 16:29

exzile9 · Post by **exzile9** » 07 Jun 2018, 16:54

Also sorry for my late response... My notifications are on now.

Post by **oragex** » 07 Jun 2018, 20:14

Talk with Xemodex and explain them the whole issue. They know these things in and out. And I think it can be fixed if you still have the original CEM, fried or not.

exzile9 · Post by **exzile9** » 07 Jun 2018, 21:03

Yeah sounds like the best way out, I waited to late to call today, so I'll hit them up in the A.M.