Description
ServiceMaxx Pro J1939 is a legacy engine diagnostic and service application for supported International/Navistar electronic engines. Its functions include diagnostic code access, engine data viewing, configurable parameters and supported service tests.
Diagnostic and service functions
- Read and clear supported diagnostic fault codes.
- View, graph and save engine data, and monitor engine-control input and output signals.
- View and modify supported configurable ECM parameters.
- Run supported KOEO and KOER tests, injector and cylinder-related tests, and cooling-fan or other actuator tests where supported.
- Record engine-signal snapshots for later playback.
Coverage and communication
The software is associated primarily with legacy International/Navistar J1939 MaxxForce engine diagnostics. Coverage varies by build, engine generation and installed data. It is designed for supported heavy-duty vehicle data links and RP1210 interfaces; ServiceMaxx communication documentation also references J1939/J1708-capable RP1210 interfaces.
Legacy software context
Navistar discontinued future development of ServiceMaxx J1939 and designated Navistar Engine Diagnostics (NED) as its direct replacement for J1939 MaxxForce/Navistar engine diagnostics. ServiceMaxx remains a legacy option for technicians working with compatible engines.









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