I have a spare BCU, but thought they were vin coded, so didn't swap yet as I was going to code the vin?
Yes voltages are all good and DRB3 isn't reading the limit switches at the switch either up or down. (I can manually operate the motor) I was going to break out the wiring diagrams next to trace for continuity up to the BCU as limit switches are testing good.
I am leaning towards the BCU as when I took a look the electronic box cooling fan is not working. things were hot!
PTCM is saying blocked in DRB3 so signals aren't even getting that far.