{"nhtsa_id":622377,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-17","date":"2001-06-01","document_id":"SF226AD","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP","mfr_system":null,"summary":"SOME SPECIFIC FREIGHTLINER CUSTOM CHASSIS FS-65 SCHOOL BUS CHASSIS, MB AND FB SHUTTLE BUSES AND MC RECREATIONAL VEHICLES MANUFACTURED BETWEEN 03/01/99 AND 01/13/00 EQUIPPED WITH A MERITOR-WABCO D-VERSION HYDRAULIC ABS, THE INTERNAL DIAGNOSTIC SYSTEM OF FIRST GENERATION MERITOR WABCO D-VERSION HYDRAULIC ABS IS NOT ABLE TO DETECT AN EXCESSIVE AIR GAP BETWEEN A WHEEL SPEED SENSOR AND TONE RING. IF THIS OCCURS, THE ABS FAULT LIGHT WILL NOT ACTIVATE AND THE ABS WILL NOT FUNCTION AT THIS WHEEL POSITION. THE MODIFICATION CONSISTS OF REMOVING AND REPLACING THE ABS ECU WITH THIRD GENERATION SOFTWARE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/622377","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"abs","name":"Anti-lock brakes","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"RECREATIONAL VEHICLE","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"SCHOOL BUS","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"SHUTTLE BUS","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":[]}