Fit an isolation switch.Sorry just realised had this same problem 2years ago and Win told me it was eem not recognising injection pump. Case dealer cleared it....must be voltage drop when cranking but anyone know why?
I had deadly trouble with one dropping the voltage in winter if left for a few days.
Fit it to the negative I think if you fit them to the positive you can try pulling current though the ecus and do harm I might be wrong.
Them vp pumps do give trouble tho.