# Service bulletin SSM74189

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10158986
- Published by NHTSA: 2019\-04\-22
- Manufacturer's number: SSM74189
- Manufacturer's date: 2019\-03\-26
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

During Pre Delivery Inspection \(PDI\) it may not be possible to activate the Telematics Control Module \(TCU\) or customers may complain that SOS Limited Functionality is displayed on the Instrument Cluster \(IC\). Both scenarios will be accompanied with Diagnostic Trouble Code \(DTC\) U2109\-09 \(Back up Battery Component Failures\) stored in the TCU.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158986-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158986-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Trouble codes named

U2109

## Vehicles listed

- 2017 to 2019 LAND ROVER DISCOVERY
- 2017 to 2019 LAND ROVER RANGE ROVER
- 2017 to 2019 LAND ROVER RANGE ROVER EVOQUE
- 2017 to 2019 LAND ROVER RANGE ROVER SPORT
- 2018 to 2019 LAND ROVER RANGE ROVER VELAR

## Recalls for the same vehicles and component

- [26V599000](/recalls/nhtsa/26V599000.md), 2026-09-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [26V248000](/recalls/nhtsa/26V248000.md), 2026-04-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [23V393000](/recalls/nhtsa/23V393000.md), 2023-06-01: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; LATCHES/LOCKS/LINKAGES:DOORS:LATCH
- [2020533](/recalls/tc/2020533.md), 2020-11-10: Electrical
- [20V694000](/recalls/nhtsa/20V694000.md), 2020-11-10: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [20V143000](/recalls/nhtsa/20V143000.md), 2020-03-12: ELECTRICAL SYSTEM:SOFTWARE; EXTERIOR LIGHTING
- [18V337000](/recalls/nhtsa/18V337000.md), 2018-05-23: ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE
- [17V679000](/recalls/nhtsa/17V679000.md), 2017-10-26: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## Other bulletins for the same vehicles and component

- [N861 Range Rover 17JUL26](/bulletins/11035875.md), 2026-08-05, Other: ELECTRICAL SYSTEM. Mild Hybrid Electric Vehicle \(MHEV\) Battery Offline
- [N861 Range Rover 16JUN26](/bulletins/11034884.md), 2026-07-08, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. This can result in illumination of the Malfunction Indicator Lamp \(MIL\) ,loss of start/stop functionality and no communication during diagnostic sessions.
- [N861 Range Rover 15MAY26](/bulletins/11033423.md), 2026-06-04, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended.
- [N861 Range Rover 17APR26](/bulletins/11032423.md), 2026-05-07, Other: ELECTRICAL SYSTEM. On certain 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. Malfunction Indicator Lamp \(MIL\) might be illuminated,
- [SSM76411 \- 10MAR26](/bulletins/11030751.md), 2026-04-06, Other: ELECTRICAL SYSTEM. Smart Key Deactivated message on instrument cluster and unable to start their vehicle
- [Range Rover\_N861 02\-20\-20](/bulletins/11029857.md), 2026-03-06, Other: ELECTRICAL SYSTEM. The 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. This can result in illumination of the Malfunction Indicator Lamp \(MIL\), loss of start/stop functionality and no communication during diagnostic sessions.
- [252602.027 \- 12FEB26](/bulletins/11029556.md), 2026-03-04, Service bulletin: ELECTRICAL SYSTEM. Once the vehicle is powered down via ignition cycle, it may not restart depending on remaining residual charge.
- [TUCC\_JAN2026\_25](/bulletins/11028601.md), 2026-02-06, Other: ELECTRICAL SYSTEM. There is a concern with the 48Volt charging system\(DC/DC\) with the vehicle.
- [Range Rover\_N861\_17OCT25](/bulletins/11024661.md), 2025-10-31, Other: ELECTRICAL SYSTEM. Mild Hybrid Electric Vehicle \(MHEV\) Battery Offline
- [Range Rover\_N861\_18AUG25](/bulletins/11022599.md), 2025-09-04, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. This can result in illumination of the Malfunction Indicator Lamp \(MIL\),

JSON: [/v1/bulletins/10158986](/v1/bulletins/10158986)

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