DTC U2109-91: Back-up Battery - Parametric: Action

NOTE: Following an emergency call or stolen vehicle tracking alert, a new telematic control module internal battery must be installed before this DTC can be cleared

Replace the backup battery in the telematic control module. Using the Jaguar Land Rover approved diagnostic equipment, perform the routine - Telematics Battery Replacement Reset. Clear the DTCs and retest. To ensure the SOS limited message is cleared from the cluster, the battery parameter in the telematic control module needs to be reset via the diagnostic routine - Test Internal Backup Battery