Hi Lee

I can see you are asking for Advise, that’s why I asked the questions i did.
The response I get from these questions would give me a better understanding to the advice I would give.

This vehicle is fitted with a external gateway module. This is the HUB of the complete network and acts as the translator between all the various other "buses and networks.

Therefore when you stated you checked the pins 6 and 14 of the diagnostic socket the "can was poor". If you had the schematic of the CAN layout of this system you would see that is purely used as the diagnostic bus via CAN. (Used for communication purposes between the diagnostic tool and the vehicle systems).

This is why I said not all cars are the same with regards to CAN. If this was a 2005 Mondeo for example then checking the Pins 6 & 14 of the diagnostic would give you complete data transmission of the High Speed CAN network. This is because Ford Choose to Incorporate there Gateway internal within some other control unit and not a separate gateway module.

So putting your scope leads across these two pins and checking for a signal serves no purpose in diagnosing you problem ( on this Car )

From the gateway there are five “CAN networks” operating at different transmission speeds.

CAN-BUS Powertrain
CAN-BUS Comfort
CAN-BUS Infotainment
CAN-BUS Instrument panel
CAN-BUS Diagnostic

All these networks are completely individual to each the only common connection is the Gateway module.

The instrument Can-bus and diagnostic Can-bus are the Buses that have no other node connected to there bus.

All the other Can-bus networks can have several other nodes connected to there network.

The point I was making is there is lots of general information out there, which does explain the basic concepts of CAN-bus and some foundation. But this does not always relate to every vehicle.

Surely if you have a good understanding of electronics and CAN-bus then you should agree you should not really be attempting this type of repair without the correct schematics and product knowledge. From your post I can see you are half way there because you clearly have invested in the correct tools.

Like Matt as said you can check the various if the various networks and nodes are active by looking in dynamic data

MVB 125 to 127 will show all modules on the (powertrain bus)

MVB 130 to 133 will show all modules on the (comfort bus)

MVB 140 to 141 will show all modules on the (infotainment bus)

Make sure you have your sample rate and time base set to high and fast rate to capture the data.

Also Try the serial decoding function with Pico, but make so you have the Red lead connected to the CAN H signal and black to CAN L signal.

If time allows I could be doing some Training sessions towards the end of this year that will cover this in more detail.

Hope this helps

Darren………….