The Cummins Engine Management System (EMS), centered on the Electronic Control Module (ECM), uses sensors (CKP, MAP, EGT, etc.) to monitor engine conditions and commands actuators (injectors, VGT, EGR) for precise control. It optimizes air-fuel ratios, manages emissions aftertreatment, and ensures engine protection, enabling performance, fuel efficiency, and emissions compliance. Understanding its architecture is key for diagnostics and maintenance.

Maintaining Cummins engine timing belts or chains requires precise replacement. Identify the system, prepare tools/genuine kits, remove components, align timing marks, install new parts, verify operation, and follow OEM procedures to avoid damage.