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+--- Thread: S90 T8 HVCH(high voltage coolant heater) to CPM (combustion preheater) swap problem (/showthread.php?tid=755)
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RE: S90 T8 HVCH(high voltage coolant heater) to CPM (combustion preheater) swap problem - liushaohuai5 - 04-16-2025
(01-19-2025, 01:29 PM)naxitrall Wrote: Hi!
I recently swapped on my S90 LWB T8 2018my HVCH to CPM. Since my HVCH was bad i looked all the parts and saw that its pretty easy to swap from HVCH to CPM since all coolant hoses was already there. So i ordered all necessary parts for swapping - CPM, Fuel pump and lines + all needed connectors/pins.
Yesterday i finished all the wiring and changed carconfig as some similar type of car. Now i get Climate control relay error from cem (its wired up properly i think..) and no communication with CPM from CCM. When i manually run climate control relay on engine bay fuse box then i can get some parameters with Orbit(etc CPM part numbers) but still CCM has its no communication with CPM error. I have tried 2 different CPM and i know one is working 100%. I'm really getting frustrated with this. Have looked 1000 times all wiring diagrams in VIDA but still cant figure out where is the problem.
I hope someone here may have some good ideas..
What is CPM? I cannot find the HVCH loc either. Is it in the same location in XC90?