https://docs.emtronaustralia.com.au/engine-management/config/triggers/crank-sync-sensors/index.htmlOverview The Crank Index Sensor establishes the crankshaft position, while the Sync Sensor identifies the engine phase within the complete engine cycle. This allows the ECU to determine the exact engine position and correctly identify the individual cylinder events. For example, a conventional four-stroke engine has a 720° engine cycle, while a rotary engine has a 360° engine cycle.Hugoen-us