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Service bulletin sbu54056

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 id10160707
Published by NHTSA2019-06-03
Manufacturer's numbersbu54056
Manufacturer's date2019-03-08
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

sbu54056 Powernet Troubleshooting Guide Batteries, Path, Alternator, and Starter

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
FCCC MT452017 to 2018
FCCC MT55G2017 to 2018
FCCC S22017 to 2018
FREIGHTLINER M22017
FREIGHTLINER M2 BUSINESS CLASS2018
THOMAS BUILT BUSES MINOTOUR2017 to 2018
THOMAS BUILT BUSES SAF-T-LINER C22017 to 2018
THOMAS BUILT BUSES SAF-T-LINER EFX2017 to 2018
THOMAS BUILT BUSES SAF-T-LINER HDX2017 to 2018

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

Other bulletins for the same vehicles and component
SS10327282021-06-09. Service bulletin. SS 1032728 Bulkhead Module Fault Codes 524280 thru 524286 with FMI 7 Clarification
SS10329892021-06-09. Service bulletin. Service Solution SS 1032989 – BHM Fault Code Changes
SS10332892021-06-09. Service bulletin. Service Solution SS 1033289 BHM Fault Code SPN 524249 / FMI 7
FAB1562021-05-18. Service bulletin. Freightliner Action Bulletin FAB156 M2 aux rear heat and AC
FAB1522021-05-18. Service bulletin. Freightliner Action Bulletin FAB152 Chassis Module Relocation
D19M3 GHG172019-06-03. Service bulletin. D19M3 GHG17 Detroit? DD5? Software Reprogramming
DOC-10337432018-12-10. Service bulletin. SS 1033743: M2 Parameters Disabled after Programming the BHM
15-0162018-03-05. Service bulletin. 15-016-DLR New Essential Tool For CPWA, CPPRA, Ltd CPPRA, & DSDWC Parties: Cadex CA-12 Battery Tester
0237-142018-01-05. Service bulletin. 0237-14 Engine Brake Solenoid
2017-09382017-08-01. Service bulletin. E-ONE vehicles are designed with electrical circuit protection (e.g. fuses), to provide overcurrent protection during short-circuit conditions or malfunction of components. Fuses are sometimes shared amongst different circuits. For example, the circuits for the pump primer motor and chassis power share a common 300Amp fuse. If either of these circuits experiences an electrical overload, the fuse will act as designed to protect the users and the vehicle from further damage. As such, an overcurrent condition in the pump primer circuit will also disconnect main power from the cab and chassis and cause the engine to shut down.