Volvo vnl d12 j1939 data link erratic no communication

When driving my truck it may lose power then kick back in once i let off the pedal and step back on it then i get message check engine ECU at next stop constantly then right after that i get messages check transmission at next stop then truck only lets me go in 1 or 2nd gear but all codes come back as j1939 data link communication erratic

 

I just purchased one but iam not familiar with using it and iam not sure on what data connector i have i can take a picture and send it to you so you can see it but iam willing to learn because if i can save myself money on fixing my truck myself iam down for it

 

Here the picture of my data connector

 

Between pin C and D iam getting 0.46 and 0.47

 

With key on getting 1.38 for pin A and C and Pin A and D 1.41

 

The codes was inactive and the transmission code was gone but i did notice a wire on my starter could that have been the reason

 

This how it look