03 Civic Temp sensor error code on 3 replacement batteries
 

A friend has an 03 Civic and he's tried 3 different salvage yard packs and each one has given the same battery temp sensor error when installed in the car. I think it's a wiring/connector issue in the vehicle that got messed up during removal/installation of the first battery since it seems unlikely that all 3 have the exact same problem. Any idea where to start looking, which connector and/or circuit, or maybe fuse, could be the source?

Maybe a link to a wiring diagram or schematic that shows the temp sensor wiring?