{"nhtsa_id":11013538,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-02-04","date":"2021-06-04","document_id":"SC-21-077","mfr_campaign":"SC-21-077","replaces":null,"component":"ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM","mfr_system":null,"summary":"Transit bus software update to the batteries, charge controller and vehicle controller. Fixes coolant level LEDs, ESM updated specific parameters around temperatures and auto pack configuration, BMS SW resolves brick imbalance, min/max humidity levels.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013538-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013538-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11013538","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PROTERRA","model":"CATALYST","year_from":2019,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"PROTERRA","model":"ZX5","year_from":2019,"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":[]}