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Service bulletin 08-105-26

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11030115
Published by NHTSA2026-03-18
Manufacturer's number08-105-26
Manufacturer's date2026-03-10
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Flash: Global Telematics Box Module (TBM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● B22A9-96 - ECU Internal Performance-Component Internal Failure. ● B1560-11 - Cellular Antenna 1-Circuit Short To Ground. ● B1560-13 - Cellular Antenna 1-Circuit Open. ● B1561-11 - Cellular Antenna 2-Circuit Short To Ground. ● B1561-13 - Cellular Antenna 2-Circuit Open. ● B1562-14 - GPS Antenna-Circuit Short To Ground Or Open. The customer may experience the following: ● Uconnect Box requires service message at start up on the display screen. This bulletin involves reprogramming the TBM with the latest available software.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Trouble codes named

B1560, B1561, B1562, B22A9

Vehicles listed
JEEP GRAND WAGONEER2026
JEEP WAGONEER2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
08-374-262026-10-16. Service bulletin. R1H U43.17 Software Update - FOTA Customers may experience the following: SYMPTOM: ● CarPlay® application crash. ● Intermittent CarPlay® connection or extended connection time. ● Apple CarPlay® radio lagging, freezing or display glitches. ● Audio intermittently cuts out. ● Radio display blank. ● Intermittent Android Auto® / CarPlay® reconnection concern. ● Abnormal radio screen display when adjusting audio volume using the steering wheel controls after extended Bluetooth audio playback from an Android device. ● Unable to add or pair a device to the Head Unit (HU) while the vehicle is in motion. ● Bluetooth-enabled devices cannot be discovered when attempting to pair a phone, even when the device is inside the vehicle. ● Turn Signal Activated Blind Spot View activates slower when the left turn signal is used compared to the right turn signal. ● Android Auto® launches automatically with a blank screen. ● Radio display goes blank while audio continues to play, and radio functions become inoperative. ● Vehicle Settings page becomes unresponsive or frozen. ● Android Auto® fails to connect. ● FamCAM softkey requires multiple presses before launching. ● Radio resets or reboots while driving. ● Flashing odometer. ● Selectable Tire Fill Assist application displays an illegible "Save as Preset" softkey. ● Surround View Camera (SVC) guidelines remain displayed after the guidelines setting has been turned OFF through the radio. In addition, the following software enhancement is included: ● Improved Wi-Fi connectivity performance.
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9100861 Rev 42026-08-26. Service bulletin. PUMP, Auxiliary Coolant, High Temperature Before replacing the High Temperature Auxiliary Coolant Pump, please perform the following steps: 1) Key ON/OFF and let the after-run pump run for at least 20 minutes before moving on to step #2. 2) Inspect the pump connector area for presence of water. 3) Inspect the pump connector for corrosion. 4) Inspect the pump for coolant contamination as this can cause the pump to stall. 5) Inspect battery terminals for damage to rule out a battery drainage issue. 6) Ensure the PCM is up-to-date with the latest available flash.