Is there a wiring diagram for the OBD2 socket to the ECU. I have a feeling that there is a fault somewhere and want to checked that all the wires are connecting.

The Multiecuscan s/w keeps coming up with a connection fault whatever interface I use. I have been sent some diagnostic s/w from UK-Diagnostics which gives the following readout

"[18:51:18.756] Thu Aug 02 18:51:18 2018
[18:51:18.756] PCMSCAN™ v2.4.8 (Build 855)
[18:51:18.787] No licenses found.
[18:51:25.084] Creating New Configuration File...
[18:51:25.100] Loading OBD-II Parameter Set...
[18:51:25.194] Loading PID scripts...
[18:51:25.194] Loaded 3 PID scripts.
[18:51:46.787] Opening OBD-II Connection...
[18:51:46.787] Searching for ELM interface...
[18:51:46.787] Checking COM3...
[18:51:48.350] Found ELM interface on COM3!
[18:51:54.429] Failed to open OBD-II connection! Error 104: Error detecting OBD-II protocol."

This seems to point the fault at the car

Can anyone help here please.