DTC U2109-09: Back-up Battery - Component failure: Action

Using the Jaguar Land Rover approved diagnostic equipment, run routine - Test Internal Backup Battery (0x040C). If the fault persists go to step 2, if not go to step 3
Check the front infotainment control module software release notes to see if a repair is available and update the front infotainment control module and repeat step 1. If no software update is available go to step 3
Check for other related Diagnostic Trouble Code(s) and refer to the relevant DTC index