Fiat Ducato
2021–2025

Illustration — use it to know where to look.

Location

Lower dashboard on the driver's side, inside the dashboard fusebox compartment. Open the small cubby/storage pocket low on the dash beside the steering column, undo the two crosshead screws below it and drop the fusebox cover — the 16-pin connector sits behind a rubber blanking cap with a yellow centre, right next to the cab fuses. The location is the same across panel van, chassis cab and motorhome-base trims, though on camper conversions the converter sometimes fits trim over the cubby that has to come off first.

How to access

Open the lower dashboard cubby/storage tray, undo the two crosshead screws beneath it and remove the fusebox cover panel. The OBD socket is capped with a rubber plug that has a yellow centre — pull the cap off and the 16-pin connector is exposed beside the cabin fuses. No special tools beyond a crosshead screwdriver. Note the diagnostic socket on these vans is policed by a Security Gateway: on most 2021-onwards builds a separate SGW module sits behind the glovebox, and on later builds the gateway is folded into the BCM. Plain OBD reads/clears may pass, but immobiliser work does not go through this socket (see the programming notes).