{"nhtsa_id":10171057,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-02-05","date":"2020-01-13","document_id":"TT470","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; EQUIPMENT","mfr_system":null,"summary":"TECHNICAL TIP BULLETIN TT470: CELLULAR STRENGTH IMPROVEMENT OPTIONS. PURPOSE: Dealers with low cellular signal strength inside the dealership have experienced difficulty performing TCU (Telematic Control Unit) initialization. Harley-Davidson does not currently endorse any manufacturer or option of cell communications. The bulletin provides awareness of some options available if cellular reception is poor inside the dealership.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171057-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171057-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171057","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"HARLEY-DAVIDSON","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}