01-21-2025, 09:00 PM
(01-19-2025, 09:18 PM)IMAY2023 Wrote: Most likely you are missing the LIN connection from CPM to CCM.
4/7 COMBUSTION PREHEATER MODULE (CPM) Pigtail YE 0,75 (A3). This is the same LIN BUS as the front right heated seat.
Here is the wiring diagram for S/V90 https://forums.spaycetech.com/attachment.php?aid=334 Seqrch for CPM.
Hi!
I did not miss this. I used HVCH LIN wire from its old connector.
I figured this communication problem out. I had to disable rear booster fans from config and then CCM was able to communicate with CPM. Strange but that worked. Tried again to enable it and communication was lost again. I made temporary hillbilly solution to power CPM and couple of days everything seems working fine..
Now there is only Climate relay problem to solve to get it working as it should. I checked everything again and I'm 100% sure that I have wired everything as it should be.. so I'm now beginning to think that there might me some problem/difference in CEM or just another configuration error. When I manually ground BR12 (climate relay) control wire that comes from CEM then in engine bay fuse box BR12 relay clicks and powers CPM fuse as it should. So somehow CEM just wont drive this signal wire. I have double checked many times also that I have connected this wire also to correct pin.