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Service bulletin SC-22-089

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11010662
Published by NHTSA2024-11-19
Manufacturer's numberSC-22-089
Manufacturer's date2022-12-16
Campaign id or software versionSC-22-089
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Bulletin to update ADA ramp software. The vendor provided new software to support the ramp deploying and retracting at normal speed. Prior to the software the ramps were functioning slower than expected.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
PROTERRA CATALYST2019
PROTERRA ZX52021

Listing a model year does not mean every vehicle of it is concerned: the document says which.