DTC U2109-09: Back-up Battery - Component failures: Action
NOTE:
Following an emergency call or stolen vehicle tracking alert, a new telematics control module internal battery must be installed before this DTC can be cleared
- Check backup battery for poor connection or not connected
- Refer to the appropriate system wiring diagrams and check the telematics control module internal battery circuit for open circuit, high resistance
- Using JLR approved diagnostic equipment, clear the DTCs and perform routine - Test Internal Backup Battery (0x040C). If the fault persists, install a new telematics control module internal battery. Using JLR approved diagnostic equipment, reset the non rechargeable battery power level following the backup battery replacement process