DTC C1109: IGN Signal Error: General Description

EPS (MDPS=Motor Driving Power Steering) Control Module receives vehicle speed and engine RPM signal from EMS (Engine Management System) via CAN line and controls motor current accurately according to driver's steering intention. EPS CM (Control Module) monitors that operating voltage supplied as IG S/W is too high or too low on "power supply terminal". If excessive high voltage or low voltage is detected, EPS CM stops current supply to solenoid to prevent unexpected operation or damage.