Diagnostic socket fuse?

Plugged a mates diagnostic machine in last night and couldn’t get any response from my td5. The machine works fine on another td5 the same age. Didn’t have much time to fiddle about last night but I’m wondering if there is a fuse related to the diagnostic system I can check first before I go taking the cubby box out etc. Thanks in advance

The manual says F30 but I don’t seem to have that row of fuses in my box. Am I being stupid here or are they else where?

There are fuses in the seat box under the drivers seat.