Crank Shaft Position Sensor (CKPS) is magnetic inductive type. Mounted on cylinder block, it senses magnetic encoder position of crank shaft. As magnetic encoder is divided with 58 teeth and 2 missing teeth (reference point), 1 tooth corresponds to 6 degree. CKPS which calculates RPM and crank angle is important to determine fuel injection quantity and injection timing with APS. Crank shaft position is closely related to engine starting.