{"nhtsa_id":10204434,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-13","date":"2021-11-29","document_id":"TSB210259-112920","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of coolant intrusion into the high voltage junction box, through the wiring harness connections, which may cause various fault codes to activate and may disable the vehicle electrification system.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204434-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10204434-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10204434","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"hybrid-ev","name":"Hybrid and electric drive","parent":null},{"id":"traction-battery","name":"High-voltage battery","parent":"hybrid-ev"},{"id":"wiring","name":"Wiring and fuses","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"CUMMINS","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":[]}