Engine: B5254T2: Lots of DTC Codes? What is the fault?

[cornerwaysuk]

Hi All,
I have a 2005 XC90 2.5T AWD with an LPG conversion. I have owned the car for 3 years and no problems until 2 days ago. I started the car in the morning and drove 100yards stopped at a junction and the red triangle came on and the message was "Brake system......stop " it was accompanied by "Automatic Transmission needs serviceing" "Engine System needs service" anti skid needs service" . I may have the wording wrong but I am sure you get the picture. I switched the car off and started again but it was very difficyult to start the engine would not turn over all the time. I eventually got it going and the Red Traingle gone but all the messages remained. Driving the car appears fine with the messages. Since this episode the red triangle does come on and i can eventually get the car started but with messages. The car will drive with the red triangle on but in limp mode.
I have VIDA/DICE software etc and plugged the car in its 2011a version.
These are the errors that showed up....
BCM-0094 Communication Between Control Units Communication Problems with DEM.
BCM-0100 Communication Between Control Units Communication Problems with ECM.
BCM-0109 Communication Between Control Units Communication Problems with SAS. Internal Fault
BCM-0115 Communication Between Control Units Communication Problems with SAS. Signal Missing
BCM-0148 Communication Between Control Units Wrong Configuration ID.
BCM-E000 Communication Between Control Units Communicational Problems.
CEM-1A62 Communication with ECM Control Module Signal Missing.
CEM-1A64 Communication with AOC Control Module Signal Missing.
CEM-DF17 CAN-H, High Speed Network Faulty Signal
CEM-E000 Communication with Control Module Faulty Signal.
SAS-0016 Control Module Communication Fault.
SAS-E000 Control Module Communication Faulty Communication

Now I know there are a lot of codes but I dont know where to start to look for the fault or identify which component is faulty or even where it is on the car. I have read that it could be an earth wire, battery problem corroded terminals etc but just havnt a clue where to start.
Any help or advice would be much appreciated.
Many Thanks Eric

[cornerwaysuk]

Well a little disappointed, 89 views but no replies, this must be really bad. looks like the dealer gets it!

[Clan]

Originally Posted by cornerwaysuk

Well a little disappointed, 89 views but no replies, this must be really bad. looks like the dealer gets it!

I wouldnt be surprised if the CEM has got wet and corroded the two plugs and the CEM pins on top from those codes and a couple more faults too . Your dealer will know what to do , it MAY need a new CEM and a waterproofing kit if it hasnt already been done .

[cornerwaysuk]

Thanks for that, I know this may be a silly question but where is the CEM and what am I looking for? How would I know if it has a waterproofing kit? Cheers

[Clan]

Originally Posted by cornerwaysuk

Thanks for that, I know this may be a silly question but where is the CEM and what am I looking for? How would I know if it has a waterproofing kit? Cheers

the Central Electronic Module is above the throttle pedal with the fuses in .. you get to the top plugs by removing the windscreen lower panel , and the wiper motor assembly and take the cover off the box where the wiring goes through on the drivers side . It isnt really a DIY job as a new CEM has to have software loaded at the dealer , but you can see any corrosion on the two plugs there and the CEM pins which the plugs fit on to .

[danc]

Hi Eric, did you get this sorted and if so, what was the fix? Ive got similar behaviour and error codes...