Hello, guys in obd2diy.fr
Do you know the problem of JLR SDD show “Battery support unit is not connected”. please see the attached file
Make sure the ground cable is connected to a ground on the body or engine. If you connect it directly to the negative battery post, the vehicle will not recognize a state of charge. The negative cable must be connected before the battery monitor (the box on the negative cable).
JLR SDD works like a charm!