Dem communication problems

[Harvey]

Remove the module and check it for water ingress , There are number of firms that wil repair them so not Volvo dealer only.
and have a look at the plugs for corrosion.

[Mick82]

Hi Harvey put a new dem on it cleaned all plugs changed oil n filter checked for voltage to the pump got that powered the pump up with separate 12v supply that worked checked canbus high n low and got voltage over both pins but just won't communicate with vida

[davebb]

Hi Open up the Dice unit and make shore tall the leads are plugged in,
Dave

[Harvey]

Hi Harvey put a new dem on it cleaned all plugs changed oil n filter checked for voltage to the pump got that powered the pump up with separate 12v supply that worked checked canbus high n low and got voltage over both pins but just won't communicate with vida

where did you get the new dem from ?, was it brand-new or new to the car .
They are coded to the car but if you have the old unit the new one can be cloned from it.
you could also unplug the pump to see if the dem comes to life .

Just had a quick look fuse F27 & F23 on the REM are both good ?.

[Mick82]

Got a recon 1 of a guy in London all software up to date but my original unit didn't communicate either everything works on the awd it's just not communicating

[Mick82]

Both fuses are good aswell