Freightliner Cascadia 2020–2021 — technical service bulletin
Bulletin SB54-339 · NHTSA communication 10185689 · issued Jan 20, 2021
Technical service bulletin
communication type
Power Train
component
2020–2021
model years
2
vehicle entries
Official summary
Freightliner Service Bulletin for Updating the Programming of the Integrative Predictive Powertrain Control (IPPC) Module. The integrative predictive powertrain control (IPPC) module programming should be updated to the newest software. If the ignition short-cycles on these vehicles with the previous software, there is a risk that the IPPC module will not have time to write EEPROM data in the controller. If this occurs, the IPPC will set check sum fault 520208/19 and will require programming to clear it.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.