The filename typically refers to a compressed archive containing Cummins ECM Calibration files (Incal files) . These files are used by automotive technicians to update or reprogram Engine Control Modules (ECM) for Cummins engines. Common Context
: The "CI" suffix often stands for "Calibration Information" or is part of a naming convention for specific engine families (like the QSK23 or Tier 4 Interim engines). sc23204-CI.rar
: These .rar files are usually extracted and used with diagnostic software such as Cummins INSITE or ServiceRanger to flash new software onto a vehicle's computer. The filename typically refers to a compressed archive