In Antwort auf:

Should it be possible to run the fan via the diagnostics cable?



No.

You can try to unplug the connectors on the temperatursensors, watch attachment, german but I think you understand what it means

347782-Kuehlwassersensoren.jpg (0 Bytes, 140 downloads)
Gruess Roy http://roy-fuchs.smugmug.com/