{"nhtsa_id":11025661,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-11-24","date":"2025-11-21","document_id":"40-0001","mfr_campaign":"CAM0187","replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE","mfr_system":null,"summary":"The term KL50, originates from the German DIN 72552 standard for automotive electrical terminal designations. It specifically refers to the starter control circuit. This is the wire that carries the positive signal (+12V or +24V, depending on the system) to the starter motor's solenoid when the ignition key is turned to the \"start\" position or a start button is pressed. A KL50 error message is a general term for any malfunction within this critical engine cranking circuit.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025661-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025661-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11025661","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"TERBERG TAYLOR AMERICAS","model":"YT SERIES","year_from":2025,"year_to":2025,"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":[]}