A few days ago I had the DIM and CCM go out on my 2001 Volvo S60 with 187000 miles on it. I turned off the car, turned it back on and everything was fine for the rest of the day. The next day they were not working again and noticed the power seats did not work. The car runs perfectly fine, all exterior and interior lights, horn, radio, power windows and locks all work.
Autophix ES610 OBD2 states the following codes:
CEM-1A23 Increased Power Supply Relay
CEM-1A56 Communication with DIM
CEM-1A55 Communication with CCM
CEM-1A54 Communication with PSM
ECM-6B00 Malfunction indicator lamp (MIL)
SRS-00D5 Front Left front impact sensor/SRS indicator lamp
UEM-0005 Sun Roof
I pulled every single fuse out of the car and none were blown. I have disconnected and reconnected the battery. I am guessing the next step is checking out the CEM?
Any help on things to check to troubleshoot next would be greatly appreciated, thanks!

 

https://www.dtcdecode.com/Volvo/CEM-1A23 I think the first code is what is giving you the rest of the CEM codes. Points to a power relay issue for the CEM, whether it be incorrectly installed or possibly a bad connection. I assume this is under the hood, but maybe someone else can lead you in a better direction for location

 

Thanks for the reply Dingus. I swapped out the relay in position CMI22 for the Extended X feed relay 2/29 with CMI11 for Fog light relay 2/34. The DIM, CCM and PSM started working again but fog lights of course now do not work. Ordered a replacement relay with part number 9441161 from the dealership and will install it tomorrow.

 

awsome, good to hear that it fixed it!