Checking to see if anyone has experience with a constant L4-12. I will be going there tomorrow. All I know is that a fellow co-worker installed a drive unit and had to remove PCU PWB and now it has a constant L4-12. I am guessing it is the ribbon cable or PCU PWB. Was not sure if someone came across something else.
Thanks for any help.
L4-12 is problem with second transfer.
All connectors on right place?
Tech said he never removed ribbon cables and he moved board out of way. New springs for transfer assembly. I will go and check to see if he damaged cable or board. Thanks for suggestion
I had to fix an issue similar to this with the same code. Initially I thought it was isolated to the sec trans unit so I replaced it but that didnt fix it. SO testing further I discovered I wasnt getting any power to anything in the door. Checked the ribbon connection and those were fine. tested power and signal from pcu board fine. tested at right door pwb from pcu side and they were fine. I was Not getting anything on the output side if the right door pwb to the sensors and transfer unit etc. I replaced it and the issue went away. I would take a close look with a meter at the Right door PWB.
Stupid fix. Motor was not fully plugged in.
I am having the same issue.Originally Posted by repn1999
As I am reading this thread you changed the Right Door PWB and not the sensor. You don't happen to have the part number for the PWB, do you? I need to go to the client's location and due to the distance, wanted to be prepared. Thank you!
CPWBN2198FCE2 - Right door PWB
Located on the rear side of the side door.
Thank you for this info!
Curious as to how you went with this Tech2002. You wouldn't believe it, having one throw the same error.
Re: MX-3570 - L4-12
Seriously 2days ago i do one machine that giving me issue L4 12 i change the secondary transfer belt but not solved the fault until i change the transfer sensor actually not the same machine but it might help
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