{"nhtsa_id":10184628,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-01-05","date":"2020-12-04","document_id":"SSM 49379","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Before attempting repairs for SYNC 4 system, Telematics Control Unit (TCU) or Gateway Module (GWM) concerns, dealers must complete workshop manual (WSM) diagnostics in section 415-00 for SYNC 4 or TCU concerns and 418-00 for GWM concerns. Do not attempt APIM, TCU or GWM reprogramming or replacement unless directed by a WSM pinpoint test. If the root cause of a concern is isolated to the APIM, TCU or GWM with all other possible causes ruled out, dealers must contact the Technical Assistance Center prior to performing repairs.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10184628-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10184628-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10184628","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-150","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_ford_f-150"]}],"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":[]}