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2006 XC90 V8 170,000 miles

Wife wants her back up sensors back. The AWD seemed to fail at about the same time. I think they are related but not sure as the errors are all communication types..


I have a series of codes I was hoping someone could lead me in the right direction to troubleshoot.



From VIDA reader
Brake Control Module U011400 Lost Communication with DEM
CEM: 1A64 Communication with AOC Control Module missing
REM: DD10 Lin Communication Communication fault

My understanding is the backup sensors and the AWD are routed through the REM. I have had a lot of other intermittent, but these go away when reset...the above return immediately.

Does anybody know what the voltage to the DEM should be on the Lin connection?
 
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