{"nhtsa_id":11027726,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-01-21","date":"2026-01-15","document_id":"08-011-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Global Telematics Box Module (TBM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● B22A9-96 - ECU Internal Performance-component Internal Failure. ● B1560-13 - Cellular Antenna 1-circuit Open. ● B1561-13 - Cellular Antenna 2-circuit Open. ● B1562-13 - GPS Antenna-circuit Open.** Customers may experience the following: ● Uconnect Box requires service message at start up. This bulletin involves reprogramming the TBM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11027726-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11027726-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11027726","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["B1560","B1561","B1562","B22A9"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE L","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_jeep_grand-cherokee-l"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}