DTC U2109-09: Back-up Battery - Component failures: Action
NOTE:
This DTC will cause the warning "SOS limited functionality" to be displayed on the instrument cluster
- 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 the Jaguar Landrover 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