{"nhtsa_id":10194441,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-25","date":"2021-05-07","document_id":"SB1997","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN; POWER TRAIN","mfr_system":null,"summary":"Optimization of 3-speed fan clutch control. FIELD CHANGE PROGRAM: Van Hool has optimized the multiplex program regarding to the 3-speed fan clutch control. This optimization will give a solution for the overheating issues at certain operation conditions. Owners and operators are requested to load the new multiplex program according to the step-by-step instructions given in this service bulletin.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194441-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10194441-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10194441","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"cooling-fan","name":"Cooling fan","parent":"engine"},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"VAN HOOL","model":"TDX25","year_from":2021,"year_to":2021,"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":[]}